★ MONEY · CASH FLOW · DEBT

Cash Flow to Debt Ratio Calculator: Can Debt Be Paid?

On the defaults — $500,000 of operating cash flow against $2,000,000 of total debt — the cash flow to debt ratio is 0.25 (25.00%), so the business generates 25 cents of operating cash for every dollar of debt. Put in your own operating cash flow, total debt and target ratio, and the calculator works out the cash flow to debt ratio and the operating cash flow or total debt any target needs. No cash-flow-to-debt page of any kind exists on the site — the operating-cash-flow-ratio page measures operating cash flow against current liabilities, which is a liquidity ratio, not cash flow against total debt, the cash-flow-margin page measures cash flow as a share of revenue, the debt-to-equity page measures debt against owners’ money, the free-cash-flow calculator (run 451) measures the cash left after capital spending, and the EBITDA calculator (run 449) measures EBITDA itself. This one is CASH FLOW TO DEBT ONLY — operating cash flow divided by total debt — whether the cash the day-to-day work generates can cover what the business owes.

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Cash flow to debt ratio calculator

Cash flow to debt ratio = operating cash flow ÷ total debt. Operating cash flow needed at the target = target ratio × total debt. Total debt allowed at the target = operating cash flow ÷ target ratio. The cash flow to debt ratio is operating cash flow divided by total debt — it measures whether the cash the day-to-day work generates can cover what the business owes. Operating cash flow is the cash the day-to-day work brings in — customers paying, suppliers and staff paid, before buying long-lived assets. Total debt is all the interest-bearing borrowing — loans, bonds and leases — everything the business owes that charges interest. A ratio of 0.25 means 25 cents of operating cash for every dollar of debt — at that pace the business would need four years of today’s cash flow to clear its debt, if it spent every cent on debt, which it cannot, so the ratio is read alongside other measures, not alone. A higher ratio is better: above 0.40 (40%) is generally considered strong, below 0.20 is a warning sign, and above 1.00 the business generates more operating cash in a year than its entire debt. Lenders and credit analysts use it to judge repayment capacity — a low ratio means the business leans on refinancing to stay afloat, rolling old debt into new debt instead of paying it down. The ratio differs from debt-to-equity: debt-to-equity compares debt to the owners’ money, not to the cash the business generates, so a business can look fine on debt-to-equity while its cash flow barely covers its interest. The ratio differs from free cash flow: free cash flow subtracts capital spending first, so it is stricter — a business can have a healthy cash-flow-to-debt ratio and a weak free cash flow if its assets eat the cash. The ratio differs from interest coverage: interest coverage compares earnings to the interest bill only, while cash flow to debt compares cash to the whole debt pile. A negative ratio means the business burns cash — negative operating cash flow cannot pay debt from operations at all, whatever the debt level. The ratio is read year over year and within one industry: a utility carries more debt by design than a software firm, so the same 0.25 is a different story in each. A ratio that falls year after year while debt rises is the classic early warning — the business is borrowing faster than its cash flow grows.

The operating cash flow — the default is $500,000.

The total debt — the default is $2,000,000.

The cash flow to debt ratio you want to reach — the default is 0.40.

Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,250,000.00Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,250,000.00Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,250,000.00. On $500,000.00 of operating cash flow and $2,000,000.00 of total debt the cash flow to debt ratio is 0.25 (25.00%) — the business generates 25 cents of operating cash for every dollar of debt.

Operating cash flow: $500,000.00

Total debt: $2,000,000.00

Target ratio: 0.40

Cash flow to debt ratio: 0.25 (25.00%)

Operating cash flow needed for the 0.40 target: $800,000.00

Total debt allowed for the 0.40 target: $1,250,000.00

Verdict: the business generates 25 cents of operating cash for every dollar of debt

Branch: Operating cash flow $600,000: Operating cash flow $600,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.30 (30.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,500,000.00

Branch: Total debt $1,500,000: Operating cash flow $500,000.00; total debt $1,500,000.00; cash flow to debt ratio 0.3333… (33.33%); operating cash flow needed for the 0.40 target $600,000.00; total debt allowed for the 0.40 target $1,250,000.00

Branch: Total debt $2,500,000: Operating cash flow $500,000.00; total debt $2,500,000.00; cash flow to debt ratio 0.20 (20.00%); operating cash flow needed for the 0.40 target $1,000,000.00; total debt allowed for the 0.40 target $1,250,000.00

Branch: Operating cash flow $300,000: Operating cash flow $300,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.15 (15.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $750,000.00

Branch: Operating cash flow $2,000,000: Operating cash flow $2,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 1.00 (100.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $5,000,000.00

Branch: Total debt $4,000,000: Operating cash flow $500,000.00; total debt $4,000,000.00; cash flow to debt ratio 0.125 (12.50%); operating cash flow needed for the 0.40 target $1,600,000.00; total debt allowed for the 0.40 target $1,250,000.00

Branch: Ratio bars — operating cash flow $700,000, total debt $1,000,000, operating cash flow $400,000: operating cash flow $700,000: cash flow to debt ratio 0.35 (35.00%); total debt $1,000,000: cash flow to debt ratio 0.50 (50.00%); operating cash flow $400,000: cash flow to debt ratio 0.20 (20.00%)

Reverse: Smallest whole-dollar operating cash flow for the ratio to reach 0.40: $800,000

Reverse: Smallest whole-dollar operating cash flow for the ratio to reach 0.40 (rounded): $800,000

At $800,000 the figures are: Operating cash flow $800,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.40 (40.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,000,000.00

At the lower neighbor the figures are: Operating cash flow $799,999.00; total debt $2,000,000.00; cash flow to debt ratio 0.3999995 (39.99995%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,999,997.50

At the upper neighbor the figures are: Operating cash flow $800,001.00; total debt $2,000,000.00; cash flow to debt ratio 0.4000005 (40.00005%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,000,002.50

Reverse verdict: STEP

Reverse: Largest whole-dollar total debt for the ratio to STAY at or above 0.40: $1,250,000

Reverse: Largest whole-dollar total debt for the ratio to STAY at or above 0.40 (rounded): $1,250,000

At $1,250,000 the figures are: Operating cash flow $500,000.00; total debt $1,250,000.00; cash flow to debt ratio 0.40 (40.00%); operating cash flow needed for the 0.40 target $500,000.00; total debt allowed for the 0.40 target $1,250,000.00

At the lower neighbor the figures are: Operating cash flow $500,000.00; total debt $1,249,999.00; cash flow to debt ratio 0.40000032 (40.000032%); operating cash flow needed for the 0.40 target $499,999.60; total debt allowed for the 0.40 target $1,250,000.00

At the upper neighbor the figures are: Operating cash flow $500,000.00; total debt $1,250,001.00; cash flow to debt ratio 0.39999968 (39.999968%); operating cash flow needed for the 0.40 target $500,000.40; total debt allowed for the 0.40 target $1,250,000.00

Reverse verdict: STEP

Reverse: Smallest whole-dollar operating cash flow for the ratio to reach 0.50: $1,000,000

Reverse: Smallest whole-dollar operating cash flow for the ratio to reach 0.50 (rounded): $1,000,000

At $1,000,000 the figures are: Operating cash flow $1,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.50 (50.00%); operating cash flow needed for the 0.50 target $1,000,000.00; total debt allowed for the 0.50 target $2,000,000.00

At the lower neighbor the figures are: Operating cash flow $999,999.00; total debt $2,000,000.00; cash flow to debt ratio 0.4999995 (49.99995%); operating cash flow needed for the 0.50 target $1,000,000.00; total debt allowed for the 0.50 target $1,999,998.00

At the upper neighbor the figures are: Operating cash flow $1,000,001.00; total debt $2,000,000.00; cash flow to debt ratio 0.5000005 (50.00005%); operating cash flow needed for the 0.50 target $1,000,000.00; total debt allowed for the 0.50 target $2,000,002.00

Reverse verdict: STEP

Reverse: Largest whole-dollar total debt for the ratio to STAY at or above 0.25: $2,000,000

Reverse: Largest whole-dollar total debt for the ratio to STAY at or above 0.25 (rounded): $2,000,000

At $2,000,000 the figures are: Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.25 target $500,000.00; total debt allowed for the 0.25 target $2,000,000.00

At the lower neighbor the figures are: Operating cash flow $500,000.00; total debt $1,999,999.00; cash flow to debt ratio 0.250000125 (25.0000125%); operating cash flow needed for the 0.25 target $499,999.75; total debt allowed for the 0.25 target $2,000,000.00

At the upper neighbor the figures are: Operating cash flow $500,000.00; total debt $2,000,001.00; cash flow to debt ratio 0.249999875 (24.9999875%); operating cash flow needed for the 0.25 target $500,000.25; total debt allowed for the 0.25 target $2,000,000.00

Reverse verdict: STEP

Reverse: Smallest whole-dollar operating cash flow for the ratio to reach 0.30: $600,000

Reverse: Smallest whole-dollar operating cash flow for the ratio to reach 0.30 (rounded): $600,000

At $600,000 the figures are: Operating cash flow $600,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.30 (30.00%); operating cash flow needed for the 0.30 target $600,000.00; total debt allowed for the 0.30 target $2,000,000.00

At the lower neighbor the figures are: Operating cash flow $599,999.00; total debt $2,000,000.00; cash flow to debt ratio 0.2999995 (29.99995%); operating cash flow needed for the 0.30 target $600,000.00; total debt allowed for the 0.30 target $1,999,996.67

At the upper neighbor the figures are: Operating cash flow $600,001.00; total debt $2,000,000.00; cash flow to debt ratio 0.3000005 (30.00005%); operating cash flow needed for the 0.30 target $600,000.00; total debt allowed for the 0.30 target $2,000,003.33

Reverse verdict: STEP

Reverse: Largest whole-dollar total debt for the ratio to STAY at or above 0.20: $2,500,000

Reverse: Largest whole-dollar total debt for the ratio to STAY at or above 0.20 (rounded): $2,500,000

At $2,500,000 the figures are: Operating cash flow $500,000.00; total debt $2,500,000.00; cash flow to debt ratio 0.20 (20.00%); operating cash flow needed for the 0.20 target $500,000.00; total debt allowed for the 0.20 target $2,500,000.00

At the lower neighbor the figures are: Operating cash flow $500,000.00; total debt $2,499,999.00; cash flow to debt ratio 0.20000008 (20.000008%); operating cash flow needed for the 0.20 target $499,999.80; total debt allowed for the 0.20 target $2,500,000.00

At the upper neighbor the figures are: Operating cash flow $500,000.00; total debt $2,500,001.00; cash flow to debt ratio 0.19999992 (19.999992%); operating cash flow needed for the 0.20 target $500,000.20; total debt allowed for the 0.20 target $2,500,000.00

Reverse verdict: STEP

Edge: Operating cash flow $0: Operating cash flow $0.00; total debt $2,000,000.00; cash flow to debt ratio 0.00 (0.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $0.00

Edge: Total debt $0: Operating cash flow $500,000.00; total debt $0.00; cash flow to debt ratio undefined — the business owes nothing, so there is nothing to compare against

Edge: Operating cash flow $800,001: Operating cash flow $800,001.00; total debt $2,000,000.00; cash flow to debt ratio 0.4000005 (40.00005%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,000,002.50

Edge: Total debt $1,250,001: Operating cash flow $500,000.00; total debt $1,250,001.00; cash flow to debt ratio 0.39999968 (39.999968%); operating cash flow needed for the 0.40 target $500,000.40; total debt allowed for the 0.40 target $1,250,000.00

Edge: Operating cash flow $500,000: Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,250,000.00

Edge: Operating cash flow $1,000,000: Operating cash flow $1,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.50 (50.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,500,000.00

Edge: Ratio bars: operating cash flow $700,000: cash flow to debt ratio 0.35 (35.00%); total debt $1,000,000: cash flow to debt ratio 0.50 (50.00%); operating cash flow $400,000: cash flow to debt ratio 0.20 (20.00%)

Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,250,000.00. On the defaults $500,000 of operating cash flow and $2,000,000 of total debt give a cash flow to debt ratio of 0.25 (25.00%) — the business generates 25 cents of operating cash for every dollar of debt. If the operating cash flow rose to $800,000, the ratio would reach 0.40 — and at $799,999 it is 0.3999995 (39.99995%), which displays as 40.00% but is below the 0.40 target.

Operating cash flow $600,000: Operating cash flow $600,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.30 (30.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,500,000.00.

Total debt $1,500,000: Operating cash flow $500,000.00; total debt $1,500,000.00; cash flow to debt ratio 0.3333… (33.33%); operating cash flow needed for the 0.40 target $600,000.00; total debt allowed for the 0.40 target $1,250,000.00.

Total debt $2,500,000: Operating cash flow $500,000.00; total debt $2,500,000.00; cash flow to debt ratio 0.20 (20.00%); operating cash flow needed for the 0.40 target $1,000,000.00; total debt allowed for the 0.40 target $1,250,000.00.

Operating cash flow $300,000: Operating cash flow $300,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.15 (15.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $750,000.00.

Operating cash flow $2,000,000: Operating cash flow $2,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 1.00 (100.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $5,000,000.00.

Total debt $4,000,000: Operating cash flow $500,000.00; total debt $4,000,000.00; cash flow to debt ratio 0.125 (12.50%); operating cash flow needed for the 0.40 target $1,600,000.00; total debt allowed for the 0.40 target $1,250,000.00.

Ratio bars — operating cash flow $700,000, total debt $1,000,000, operating cash flow $400,000: operating cash flow $700,000: cash flow to debt ratio 0.35 (35.00%); total debt $1,000,000: cash flow to debt ratio 0.50 (50.00%); operating cash flow $400,000: cash flow to debt ratio 0.20 (20.00%).

Reverse: The smallest whole-dollar operating cash flow for the ratio to reach 0.40 is $800,000; at $800,000 the figures are Operating cash flow $800,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.40 (40.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,000,000.00; at the lower neighbor the figures are Operating cash flow $799,999.00; total debt $2,000,000.00; cash flow to debt ratio 0.3999995 (39.99995%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,999,997.50 — verdict: STEP. Reverse: The largest whole-dollar total debt for the ratio to STAY at or above 0.40 is $1,250,000; at $1,250,000 the figures are Operating cash flow $500,000.00; total debt $1,250,000.00; cash flow to debt ratio 0.40 (40.00%); operating cash flow needed for the 0.40 target $500,000.00; total debt allowed for the 0.40 target $1,250,000.00; at the upper neighbor the figures are Operating cash flow $500,000.00; total debt $1,250,001.00; cash flow to debt ratio 0.39999968 (39.999968%); operating cash flow needed for the 0.40 target $500,000.40; total debt allowed for the 0.40 target $1,250,000.00 — verdict: STEP. Reverse: The smallest whole-dollar operating cash flow for the ratio to reach 0.50 is $1,000,000; at $1,000,000 the figures are Operating cash flow $1,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.50 (50.00%); operating cash flow needed for the 0.50 target $1,000,000.00; total debt allowed for the 0.50 target $2,000,000.00; at the lower neighbor the figures are Operating cash flow $999,999.00; total debt $2,000,000.00; cash flow to debt ratio 0.4999995 (49.99995%); operating cash flow needed for the 0.50 target $1,000,000.00; total debt allowed for the 0.50 target $1,999,998.00 — verdict: STEP. Reverse: The largest whole-dollar total debt for the ratio to STAY at or above 0.25 is $2,000,000; at $2,000,000 the figures are Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.25 target $500,000.00; total debt allowed for the 0.25 target $2,000,000.00; at the upper neighbor the figures are Operating cash flow $500,000.00; total debt $2,000,001.00; cash flow to debt ratio 0.249999875 (24.9999875%); operating cash flow needed for the 0.25 target $500,000.25; total debt allowed for the 0.25 target $2,000,000.00 — verdict: STEP. Reverse: The smallest whole-dollar operating cash flow for the ratio to reach 0.30 is $600,000; at $600,000 the figures are Operating cash flow $600,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.30 (30.00%); operating cash flow needed for the 0.30 target $600,000.00; total debt allowed for the 0.30 target $2,000,000.00; at the lower neighbor the figures are Operating cash flow $599,999.00; total debt $2,000,000.00; cash flow to debt ratio 0.2999995 (29.99995%); operating cash flow needed for the 0.30 target $600,000.00; total debt allowed for the 0.30 target $1,999,996.67 — verdict: STEP. Reverse: The largest whole-dollar total debt for the ratio to STAY at or above 0.20 is $2,500,000; at $2,500,000 the figures are Operating cash flow $500,000.00; total debt $2,500,000.00; cash flow to debt ratio 0.20 (20.00%); operating cash flow needed for the 0.20 target $500,000.00; total debt allowed for the 0.20 target $2,500,000.00; at the upper neighbor the figures are Operating cash flow $500,000.00; total debt $2,500,001.00; cash flow to debt ratio 0.19999992 (19.999992%); operating cash flow needed for the 0.20 target $500,000.20; total debt allowed for the 0.20 target $2,500,000.00 — verdict: STEP.

Edges: Operating cash flow $0 gives Operating cash flow $0.00; total debt $2,000,000.00; cash flow to debt ratio 0.00 (0.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $0.00. Total debt $0 gives Operating cash flow $500,000.00; total debt $0.00; cash flow to debt ratio undefined — the business owes nothing, so there is nothing to compare against. Operating cash flow $800,001 gives Operating cash flow $800,001.00; total debt $2,000,000.00; cash flow to debt ratio 0.4000005 (40.00005%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,000,002.50. Total debt $1,250,001 gives Operating cash flow $500,000.00; total debt $1,250,001.00; cash flow to debt ratio 0.39999968 (39.999968%); operating cash flow needed for the 0.40 target $500,000.40; total debt allowed for the 0.40 target $1,250,000.00. Operating cash flow $500,000 gives Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,250,000.00. Operating cash flow $1,000,000 gives Operating cash flow $1,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.50 (50.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,500,000.00. Ratio bars — operating cash flow $700,000, total debt $1,000,000, operating cash flow $400,000 gives operating cash flow $700,000: cash flow to debt ratio 0.35 (35.00%); total debt $1,000,000: cash flow to debt ratio 0.50 (50.00%); operating cash flow $400,000: cash flow to debt ratio 0.20 (20.00%).

Is a 0.25 cash flow to debt ratio high or low?

On the defaults — $500,000 of operating cash flow and $2,000,000 of total debt — the cash flow to debt ratio is 0.25 (25.00%). A 0.25 ratio is neither high nor low on its own: it means 25 cents of operating cash for every dollar of debt — at that pace the business would need four years of today’s cash flow to clear its debt, if it spent every cent on debt, which it cannot. Above 0.40 (40%) is generally considered strong, below 0.20 is a warning sign, and above 1.00 the business generates more operating cash in a year than its entire debt. A ratio that falls year after year while debt rises is the classic early warning — the business is borrowing faster than its cash flow grows. The ratio is read year over year and within one industry: a utility carries more debt by design than a software firm, so the same 0.25 is a different story in each.

Three things about the model are worth stating plainly.

First, the cash flow to debt ratio is $500,000 ÷ $2,000,000 = 0.25 (25.00%). Second, the operating cash flow needed for a 0.40 ratio is 0.40 × $2,000,000 = $800,000.00. And third, the total debt allowed for a 0.40 ratio is $500,000 ÷ 0.40 = $1,250,000.00; all listed in Accuracy & limitations.

The worked example, line by line

Setup: $500,000 operating cash flow, $2,000,000 total debt, target ratio 0.40.

Line 1 — the cash flow to debt ratio. The ratio is $500,000 ÷ $2,000,000 = 0.25 (25.00%).

Line 2 — the operating cash flow needed. The operating cash flow needed for a 0.40 ratio is 0.40 × $2,000,000 = $800,000.00.

Line 3 — the total debt allowed. The total debt allowed for a 0.40 ratio is $500,000 ÷ 0.40 = $1,250,000.00.

Line 4 — the check. $800,000.00 ÷ $2,000,000.00 = 0.40 (40.00%), the target ratio; and $500,000.00 ÷ $1,250,000.00 = 0.40 (40.00%), the target ratio.

Every branch, checked

Operating cash flow $600,000: Operating cash flow $600,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.30 (30.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,500,000.00 — With operating cash flow of $600,000 the ratio rises to 0.30 (30.00%).

Total debt $1,500,000: Operating cash flow $500,000.00; total debt $1,500,000.00; cash flow to debt ratio 0.3333… (33.33%); operating cash flow needed for the 0.40 target $600,000.00; total debt allowed for the 0.40 target $1,250,000.00 — With total debt of $1,500,000 the ratio rises to 0.3333… (33.33%) — one-third, rounded to 33.33%.

Total debt $2,500,000: Operating cash flow $500,000.00; total debt $2,500,000.00; cash flow to debt ratio 0.20 (20.00%); operating cash flow needed for the 0.40 target $1,000,000.00; total debt allowed for the 0.40 target $1,250,000.00 — With total debt of $2,500,000 the ratio falls to 0.20 (20.00%) — the warning line.

Operating cash flow $300,000: Operating cash flow $300,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.15 (15.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $750,000.00 — With operating cash flow of $300,000 the ratio falls to 0.15 (15.00%).

Operating cash flow $2,000,000: Operating cash flow $2,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 1.00 (100.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $5,000,000.00 — With operating cash flow of $2,000,000 the ratio is 1.00 (100.00%) — the business generates more operating cash in a year than its entire debt.

Total debt $4,000,000: Operating cash flow $500,000.00; total debt $4,000,000.00; cash flow to debt ratio 0.125 (12.50%); operating cash flow needed for the 0.40 target $1,600,000.00; total debt allowed for the 0.40 target $1,250,000.00 — With total debt of $4,000,000 the ratio falls to 0.125 (12.50%).

Ratio bars — operating cash flow $700,000, total debt $1,000,000, operating cash flow $400,000: operating cash flow $700,000: cash flow to debt ratio 0.35 (35.00%); total debt $1,000,000: cash flow to debt ratio 0.50 (50.00%); operating cash flow $400,000: cash flow to debt ratio 0.20 (20.00%) — An operating cash flow of $700,000 gives a ratio of 0.35 (35.00%); total debt of $1,000,000 gives a ratio of 0.50 (50.00%); an operating cash flow of $400,000 gives a ratio of 0.20 (20.00%).

The reverses, worked backwards

Smallest operating cash flow for the ratio to reach 0.40: At the displayed $800,000 the figures are Operating cash flow $800,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.40 (40.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,000,000.00. At the displayed $800,000 the ratio is 0.40 (40.00%) (exactly 0.40). At $799,999 the ratio is 0.3999995 (39.99995%) — it displays as 40.00% but is below the 0.40 target — so $800,000 is the smallest whole-dollar operating cash flow for the ratio to reach 0.40.

Largest total debt for the ratio to STAY at or above 0.40: At the displayed $1,250,000 the figures are Operating cash flow $500,000.00; total debt $1,250,000.00; cash flow to debt ratio 0.40 (40.00%); operating cash flow needed for the 0.40 target $500,000.00; total debt allowed for the 0.40 target $1,250,000.00. At the displayed $1,250,000 the ratio is 0.40 (40.00%) (exactly 0.40). At $1,250,001 the ratio is 0.39999968 (39.999968%) — it displays as 40.00% but is below the 0.40 target — so $1,250,000 is the largest whole-dollar total debt for the ratio to stay at or above 0.40.

Smallest operating cash flow for the ratio to reach 0.50: At the displayed $1,000,000 the figures are Operating cash flow $1,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.50 (50.00%); operating cash flow needed for the 0.50 target $1,000,000.00; total debt allowed for the 0.50 target $2,000,000.00. At the displayed $1,000,000 the ratio is 0.50 (50.00%) (exactly 0.50). At $999,999 the ratio is 0.4999995 (49.99995%) — it displays as 50.00% but is below the 0.50 target — so $1,000,000 is the smallest whole-dollar operating cash flow for the ratio to reach 0.50.

Largest total debt for the ratio to STAY at or above 0.25: At the displayed $2,000,000 the figures are Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.25 target $500,000.00; total debt allowed for the 0.25 target $2,000,000.00. At the displayed $2,000,000 the ratio is 0.25 (25.00%) (exactly 0.25). At $2,000,001 the ratio is 0.249999875 (24.9999875%) — it displays as 25.00% but is below the 0.25 target — so $2,000,000 is the largest whole-dollar total debt for the ratio to stay at or above 0.25.

Smallest operating cash flow for the ratio to reach 0.30: At the displayed $600,000 the figures are Operating cash flow $600,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.30 (30.00%); operating cash flow needed for the 0.30 target $600,000.00; total debt allowed for the 0.30 target $2,000,000.00. At the displayed $600,000 the ratio is 0.30 (30.00%) (exactly 0.30). At $599,999 the ratio is 0.2999995 (29.99995%) — it displays as 30.00% but is below the 0.30 target — so $600,000 is the smallest whole-dollar operating cash flow for the ratio to reach 0.30.

Largest total debt for the ratio to STAY at or above 0.20: At the displayed $2,500,000 the figures are Operating cash flow $500,000.00; total debt $2,500,000.00; cash flow to debt ratio 0.20 (20.00%); operating cash flow needed for the 0.20 target $500,000.00; total debt allowed for the 0.20 target $2,500,000.00. At the displayed $2,500,000 the ratio is 0.20 (20.00%) (exactly 0.20). At $2,500,001 the ratio is 0.19999992 (19.999992%) — it displays as 20.00% but is below the 0.20 target — so $2,500,000 is the largest whole-dollar total debt for the ratio to stay at or above 0.20.

A warning about the neighbours: every neighbour above sits one dollar from the star — $1 of operating cash flow or $1 of total debt — and every neighbour displays as the target when rounded to two decimals, yet sits below it. The ratio is linear in whole dollars, so the reverses have exact closed forms: the operating cash flow needed is the target times the total debt, and the total debt allowed is the operating cash flow divided by the target. The page prints the unrounded percents in full so the rounding does not mislead you: 39.99995%, 39.999968%, 49.99995%, 24.9999875%, 29.99995% and 19.999992%.

What the defaults assume

The defaults are $500,000 of operating cash flow, $2,000,000 of total debt and a target ratio of 0.40 — Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,250,000.00. With Operating cash flow $600,000, Operating cash flow $600,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.30 (30.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,500,000.00. With Total debt $1,500,000, Operating cash flow $500,000.00; total debt $1,500,000.00; cash flow to debt ratio 0.3333… (33.33%); operating cash flow needed for the 0.40 target $600,000.00; total debt allowed for the 0.40 target $1,250,000.00. With Total debt $2,500,000, Operating cash flow $500,000.00; total debt $2,500,000.00; cash flow to debt ratio 0.20 (20.00%); operating cash flow needed for the 0.40 target $1,000,000.00; total debt allowed for the 0.40 target $1,250,000.00. With Operating cash flow $300,000, Operating cash flow $300,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.15 (15.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $750,000.00. With Operating cash flow $2,000,000, Operating cash flow $2,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 1.00 (100.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $5,000,000.00. With Total debt $4,000,000, Operating cash flow $500,000.00; total debt $4,000,000.00; cash flow to debt ratio 0.125 (12.50%); operating cash flow needed for the 0.40 target $1,600,000.00; total debt allowed for the 0.40 target $1,250,000.00. With Ratio bars, operating cash flow $700,000: cash flow to debt ratio 0.35 (35.00%); total debt $1,000,000: cash flow to debt ratio 0.50 (50.00%); operating cash flow $400,000: cash flow to debt ratio 0.20 (20.00%). With Operating cash flow $0, Operating cash flow $0.00; total debt $2,000,000.00; cash flow to debt ratio 0.00 (0.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $0.00. With Total debt $0, Operating cash flow $500,000.00; total debt $0.00; cash flow to debt ratio undefined — the business owes nothing, so there is nothing to compare against — the ratio is undefined, shown as undefined with that note, never a crash and never a made-up number. With Operating cash flow $800,001, Operating cash flow $800,001.00; total debt $2,000,000.00; cash flow to debt ratio 0.4000005 (40.00005%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,000,002.50 (unrounded 40.00005% — displays 40.00% but is above the 0.40 target). With Total debt $1,250,001, Operating cash flow $500,000.00; total debt $1,250,001.00; cash flow to debt ratio 0.39999968 (39.999968%); operating cash flow needed for the 0.40 target $500,000.40; total debt allowed for the 0.40 target $1,250,000.00 (unrounded 39.999968% — displays 40.00% but is below the 0.40 target). With Operating cash flow $500,000, Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,250,000.00 (exactly 0.25). With Operating cash flow $1,000,000, Operating cash flow $1,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.50 (50.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,500,000.00. With Ratio bars, operating cash flow $700,000: cash flow to debt ratio 0.35 (35.00%); total debt $1,000,000: cash flow to debt ratio 0.50 (50.00%); operating cash flow $400,000: cash flow to debt ratio 0.20 (20.00%).

A note on the rounding: the percent is displayed to two decimals, half-up. At $799,999 of operating cash flow the unrounded percent is 39.99995% — it displays as 40.00% but is below the 0.40 target. At $1,250,001 of total debt the unrounded percent is 39.999968% — it displays as 40.00% but is below the 0.40 target. At $800,001 of operating cash flow the unrounded percent is 40.00005% — it displays as 40.00% but is above the 0.40 target. The page prints the unrounded percents so the rounding does not mislead you.

Output · formula · meaning

OutputFormulaWhat it means
Operating cash flowinput$500,000.00.
Total debtinput$2,000,000.00.
Target ratioinput0.40.
Cash flow to debt ratiooperating cash flow ÷ total debt0.25 (25.00%).
Operating cash flow needed for the 0.40 targettarget ratio × total debt$800,000.00.
Total debt allowed for the 0.40 targetoperating cash flow ÷ target ratio$1,250,000.00.
Verdictwhat the cash the day-to-day work generates can coverthe business generates 25 cents of operating cash for every dollar of debt.
Reverse: Smallest whole-dollar operating cash flow for the ratio to reach 0.40step$800,000 → $800,000.
Below the revr1 starneighborOperating cash flow $799,999.00; total debt $2,000,000.00; cash flow to debt ratio 0.3999995 (39.99995%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,999,997.50.
Above the revr1 starneighborOperating cash flow $800,001.00; total debt $2,000,000.00; cash flow to debt ratio 0.4000005 (40.00005%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $2,000,002.50.
Reverse: Largest whole-dollar total debt for the ratio to STAY at or above 0.40step$1,250,000 → $1,250,000.
Below the revr2 starneighborOperating cash flow $500,000.00; total debt $1,249,999.00; cash flow to debt ratio 0.40000032 (40.000032%); operating cash flow needed for the 0.40 target $499,999.60; total debt allowed for the 0.40 target $1,250,000.00.
Above the revr2 starneighborOperating cash flow $500,000.00; total debt $1,250,001.00; cash flow to debt ratio 0.39999968 (39.999968%); operating cash flow needed for the 0.40 target $500,000.40; total debt allowed for the 0.40 target $1,250,000.00.
Reverse: Smallest whole-dollar operating cash flow for the ratio to reach 0.50step$1,000,000 → $1,000,000.
Below the revr3 starneighborOperating cash flow $999,999.00; total debt $2,000,000.00; cash flow to debt ratio 0.4999995 (49.99995%); operating cash flow needed for the 0.50 target $1,000,000.00; total debt allowed for the 0.50 target $1,999,998.00.
Above the revr3 starneighborOperating cash flow $1,000,001.00; total debt $2,000,000.00; cash flow to debt ratio 0.5000005 (50.00005%); operating cash flow needed for the 0.50 target $1,000,000.00; total debt allowed for the 0.50 target $2,000,002.00.
Reverse: Largest whole-dollar total debt for the ratio to STAY at or above 0.25step$2,000,000 → $2,000,000.
Below the revr4 starneighborOperating cash flow $500,000.00; total debt $1,999,999.00; cash flow to debt ratio 0.250000125 (25.0000125%); operating cash flow needed for the 0.25 target $499,999.75; total debt allowed for the 0.25 target $2,000,000.00.
Above the revr4 starneighborOperating cash flow $500,000.00; total debt $2,000,001.00; cash flow to debt ratio 0.249999875 (24.9999875%); operating cash flow needed for the 0.25 target $500,000.25; total debt allowed for the 0.25 target $2,000,000.00.
Reverse: Smallest whole-dollar operating cash flow for the ratio to reach 0.30step$600,000 → $600,000.
Below the revr5 starneighborOperating cash flow $599,999.00; total debt $2,000,000.00; cash flow to debt ratio 0.2999995 (29.99995%); operating cash flow needed for the 0.30 target $600,000.00; total debt allowed for the 0.30 target $1,999,996.67.
Above the revr5 starneighborOperating cash flow $600,001.00; total debt $2,000,000.00; cash flow to debt ratio 0.3000005 (30.00005%); operating cash flow needed for the 0.30 target $600,000.00; total debt allowed for the 0.30 target $2,000,003.33.
Reverse: Largest whole-dollar total debt for the ratio to STAY at or above 0.20step$2,500,000 → $2,500,000.
Below the revr6 starneighborOperating cash flow $500,000.00; total debt $2,499,999.00; cash flow to debt ratio 0.20000008 (20.000008%); operating cash flow needed for the 0.20 target $499,999.80; total debt allowed for the 0.20 target $2,500,000.00.
Above the revr6 starneighborOperating cash flow $500,000.00; total debt $2,500,001.00; cash flow to debt ratio 0.19999992 (19.999992%); operating cash flow needed for the 0.20 target $500,000.20; total debt allowed for the 0.20 target $2,500,000.00.
Operating cash flow $600,000same modelOperating cash flow $600,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.30 (30.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,500,000.00.
Total debt $1,500,000same modelOperating cash flow $500,000.00; total debt $1,500,000.00; cash flow to debt ratio 0.3333… (33.33%); operating cash flow needed for the 0.40 target $600,000.00; total debt allowed for the 0.40 target $1,250,000.00.
Total debt $2,500,000same modelOperating cash flow $500,000.00; total debt $2,500,000.00; cash flow to debt ratio 0.20 (20.00%); operating cash flow needed for the 0.40 target $1,000,000.00; total debt allowed for the 0.40 target $1,250,000.00.
Operating cash flow $300,000same modelOperating cash flow $300,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.15 (15.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $750,000.00.
Operating cash flow $2,000,000same modelOperating cash flow $2,000,000.00; total debt $2,000,000.00; cash flow to debt ratio 1.00 (100.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $5,000,000.00.
Total debt $4,000,000same modelOperating cash flow $500,000.00; total debt $4,000,000.00; cash flow to debt ratio 0.125 (12.50%); operating cash flow needed for the 0.40 target $1,600,000.00; total debt allowed for the 0.40 target $1,250,000.00.
Ratio bars — operating cash flow $700,000, total debt $1,000,000, operating cash flow $400,000same modeloperating cash flow $700,000: cash flow to debt ratio 0.35 (35.00%); total debt $1,000,000: cash flow to debt ratio 0.50 (50.00%); operating cash flow $400,000: cash flow to debt ratio 0.20 (20.00%).

Who uses this

  • The investor checking a company before buying: they learn $500,000 of operating cash flow against $2,000,000 of total debt is a ratio of 0.25 (25.00%) — and they check the $800,000 reverse to see the operating cash flow a 0.40 ratio needs.
  • The owner planning next year’s borrowing: they learn $1,250,000 of total debt is the most the business can carry and still hold a 0.40 ratio — and they check the $2,000,000 reverse to see the total debt a 0.25 ratio allows.
  • The analyst comparing two companies in one industry: they learn the same 0.25 is a different story in a utility and a software firm — and they check the $1,000,000 reverse to see the operating cash flow a 0.50 ratio needs.
  • The student learning solvency measures: they learn the cash flow to debt ratio is operating cash flow divided by total debt — and they check the $600,000 reverse to see the operating cash flow a 0.30 ratio needs.

Accuracy & limitations

The math is first-principles: the cash flow to debt ratio is operating cash flow divided by total debt; the operating cash flow needed for the target is the target ratio times total debt; the total debt allowed for the target is operating cash flow divided by the target ratio — all in whole dollars, the percent displayed to two decimals half-up. At $0 of total debt the ratio is UNDEFINED — the business owes nothing, so there is nothing to compare against — the page shows the ratio as undefined with that note, never a crash and never a made-up number. A negative ratio means the business burns cash — at −$100,000 of operating cash flow the ratio is −0.05 (−5.00%) — a negative ratio means the business burns cash — it cannot pay debt from operations at all — and a negative ratio is not a bargain signal, it is a warning sign — so the ratio is negative and the calculator shows the negative figure with a note, never hides it and never shows “—” for it. What the model cannot do is judge the business: the ratio says nothing about the interest bill, the debt maturity, or the quality of the operating cash flow — a low ratio means the business leans on refinancing to stay afloat, rolling old debt into new debt instead of paying it down. The ratio differs from debt-to-equity: debt-to-equity compares debt to the owners’ money, not to the cash the business generates. The ratio differs from free cash flow: free cash flow subtracts capital spending first, so it is stricter. The ratio differs from interest coverage: interest coverage compares earnings to the interest bill only, while cash flow to debt compares cash to the whole debt pile. Use it to see whether the cash the day-to-day work generates can cover what the business owes — then read the rest of the accounts.

Cite this calculatorBright Side Kit. “Cash Flow to Debt Ratio Calculator: Can Debt Be Paid?” brightoolbox.com, 2026. Method: Cash flow to debt ratio = operating cash flow ÷ total debt; operating cash flow needed at the target = target ratio × total debt; total debt allowed at the target = operating cash flow ÷ target ratio. Reverses: smallest whole-dollar operating cash flow for the ratio to reach 0.40 is $800,000 (at $800,000 the ratio is 0.40 (40.00%), exactly 0.40; at $799,999 the ratio is 0.3999995 (39.99995%) — displays 40.00% but is below the 0.40 target); largest whole-dollar total debt for the ratio to STAY at or above 0.40 is $1,250,000 (at $1,250,000 the ratio is 0.40 (40.00%), exactly 0.40; at $1,250,001 the ratio is 0.39999968 (39.999968%) — displays 40.00% but is below the 0.40 target); smallest whole-dollar operating cash flow for the ratio to reach 0.50 is $1,000,000 (at $1,000,000 the ratio is 0.50 (50.00%), exactly 0.50; at $999,999 the ratio is 0.4999995 (49.99995%) — displays 50.00% but is below the 0.50 target); largest whole-dollar total debt for the ratio to STAY at or above 0.25 is $2,000,000 (at $2,000,000 the ratio is 0.25 (25.00%), exactly 0.25; at $2,000,001 the ratio is 0.249999875 (24.9999875%) — displays 25.00% but is below the 0.25 target); smallest whole-dollar operating cash flow for the ratio to reach 0.30 is $600,000 (at $600,000 the ratio is 0.30 (30.00%), exactly 0.30; at $599,999 the ratio is 0.2999995 (29.99995%) — displays 30.00% but is below the 0.30 target); largest whole-dollar total debt for the ratio to STAY at or above 0.20 is $2,500,000 (at $2,500,000 the ratio is 0.20 (20.00%), exactly 0.20; at $2,500,001 the ratio is 0.19999992 (19.999992%) — displays 20.00% but is below the 0.20 target). Defaults: Operating cash flow $500,000.00; total debt $2,000,000.00; cash flow to debt ratio 0.25 (25.00%); operating cash flow needed for the 0.40 target $800,000.00; total debt allowed for the 0.40 target $1,250,000.00 Bright Side Kit. "Cash Flow to Debt Ratio Calculator: Can Debt Be Paid?" https://brightoolbox.com/cash-flow-to-debt-ratio-calculator/ Accessed October 27, 2026.
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Frequently asked questions

What is the cash flow to debt ratio?

Operating cash flow divided by total debt. On $500,000 of operating cash flow and $2,000,000 of total debt the ratio is 0.25 (25.00%) — the business generates 25 cents of operating cash for every dollar of debt.

How do I calculate the cash flow to debt ratio?

Divide the operating cash flow by the total debt. $500,000 ÷ $2,000,000 = 0.25 (25.00%).

What does a 0.25 cash flow to debt ratio mean?

The business generates 25 cents of operating cash for every dollar of debt. At that pace the business would need four years of today’s cash flow to clear its debt, if it spent every cent on debt, which it cannot.

How much operating cash flow do I need for a 0.40 ratio?

$800,000 with $2,000,000 of total debt. The smallest whole-dollar operating cash flow for the ratio to reach 0.40 is $800,000. At $800,000 the ratio is 0.40 (40.00%), exactly 0.40.

How much debt can I carry and still hold a 0.40 ratio?

$1,250,000 with $500,000 of operating cash flow. The largest whole-dollar total debt for the ratio to stay at or above 0.40 is $1,250,000. At $1,250,000 the ratio is 0.40 (40.00%), exactly 0.40.

What does a negative cash flow to debt ratio mean?

The business burns cash. At −$100,000 of operating cash flow the ratio is −0.05 (−5.00%) — a negative ratio means the business burns cash — it cannot pay debt from operations at all — and a negative ratio is not a bargain signal, it is a warning sign — and the calculator shows the negative figure with a note, never hides it and never shows “—” for it.

What if the business owes nothing?

The ratio is undefined. At $0 of total debt the ratio is undefined — the business owes nothing, so there is nothing to compare against — shown as undefined with that note, never a crash and never a made-up number.

Why does $799,999 of operating cash flow miss the 0.40 target?

Because $799,999 ÷ $2,000,000 = 0.3999995 (39.99995%). The ratio displays as 40.00% but is below the 0.40 target — the smallest whole-dollar operating cash flow for the ratio to reach 0.40 is $800,000.