How checking and savings interest compare
This page compares a checking account and a savings account on interest and fees only — not on features. Checking is for spending and savings is for keeping, and this page does not score which is better to use. Each APY is treated as a nominal rate compounded monthly: the monthly rate is the APY divided by 12, and the future value is the balance grown by the monthly rate for 12 times the years. The interest is the future value minus the balance. The fees total is the monthly fee times 12 times the years, and the net is the interest minus the fees. The winner is the account with the higher net, and the gap is the difference between the two nets. The monthly interest is the interest divided by the months, and the effective yield is (1 + the monthly rate) to the power of 12, minus 1.
At the defaults — a $5,000 balance, checking at 0.01% APY, savings at 4.00% APY, 1 year, no fees — the checking monthly rate is 0.01% ÷ 12 = 0.000833%, and the checking future value is $5,000 × 1.0000083312 = $5,000.50, so the checking interest is $0.50. The savings monthly rate is 4% ÷ 12 = 0.3333%, and the savings future value is $5,000 × 1.00333312 = $5,203.71, so the savings interest is $203.71. With no fees the nets are the same as the interest, so savings wins by $203.71 − $0.50 = $203.21 a year. The monthly interest is $0.04 for checking and $16.98 for savings, and the effective yields are 0.01% and 4.07%.
| Case | Checking interest | Savings interest | Checking net | Savings net | Gap |
|---|
| Default ($5,000, 0.01% / 4.00%, 1 yr) | $0.50 | $203.71 | $0.50 | $203.71 | $203.21 |
| Balance $1,000 | $0.10 | $40.74 | $0.10 | $40.74 | $40.64 |
| Balance $25,000 | $2.50 | $1,018.54 | $2.50 | $1,018.54 | $1,016.04 |
| Balance $10,000 | $1.00 | $407.42 | $1.00 | $407.42 | $406.42 |
| Checking APY 0.50% | $25.06 | $203.71 | $25.06 | $203.71 | $178.65 |
| Checking APY 0.00% | $0.00 | $203.71 | $0.00 | $203.71 | $203.71 |
| Savings APY 5.00% | $0.50 | $255.81 | $0.50 | $255.81 | $255.31 |
| Savings APY 2.00% | $0.50 | $100.92 | $0.50 | $100.92 | $100.42 |
| Years 5 | $2.50 | $1,104.98 | $2.50 | $1,104.98 | $1,102.48 |
| Checking fee $12/mo | $0.50 | $203.71 | -$143.50 | $203.71 | $347.21 |
| Savings fee $5/mo | $0.50 | $203.71 | $0.50 | $143.71 | $143.21 |
The worked example, line by line
Setup: balance $5,000, checking APY 0.01%, savings APY 4.00%, years 1 (12 months), monthly fees $0.
Line 1 — the checking interest. The monthly rate is 0.01% ÷ 12 = 0.000833%. $5,000 × 1.0000083312 = $5,000.50, so the interest is $0.50.
Line 2 — the savings interest. The monthly rate is 4% ÷ 12 = 0.3333%. $5,000 × 1.00333312 = $5,203.71, so the interest is $203.71.
Line 3 — the nets. With no fees the nets are the interest: checking $0.50, savings $203.71.
Line 4 — the gap. $203.71 − $0.50 = $203.21 a year, so savings wins.
Line 5 — the monthly interest and the yields. Checking earns $0.04 a month and savings $16.98 a month, and the effective yields are 0.01% and 4.07% (exact 4.0742%).
Reverse: the balance where the savings interest beats checking by $100 a year is $2,460.54 (exact 2,460.5368); the savings APY needed to earn $500 of interest in 1 year on $5,000 is 9.57% (exact 9.5690); and the years for savings at 4% to earn $1,000 of interest on $5,000 is 4.57 (exact 4.5656).
Every branch, checked
Balance $1,000: checking earns $0.10 and savings earns $40.74, so savings wins by $40.64. A fifth of the balance earns a fifth of the interest.
Balance $25,000: checking earns $2.50 and savings earns $1,018.54, so savings wins by $1,016.04. Five times the balance earns five times the interest, and the gap is over a thousand dollars a year.
Balance $10,000: checking earns $1.00 and savings earns $407.42, so savings wins by $406.42. Doubling the balance doubles the gap.
Checking APY 0.50% (high-yield checking): checking earns $25.06 and savings earns $203.71, so savings wins by $178.65. A high-yield checking account closes the gap a little, but savings still wins by a lot.
Checking APY 0.00%: checking earns $0.00 and savings earns $203.71, so savings wins by $203.71. At 0% the checking account pays nothing at all.
Savings APY 5.00%: savings earns $255.81 and checking earns $0.50, so savings wins by $255.31. One more point of savings APY adds $52.10 a year on $5,000.
Savings APY 2.00%: savings earns $100.92 and checking earns $0.50, so savings wins by $100.42. Halving the savings rate more than halves the gap, because the checking interest stays the same.
Years 5: checking earns $2.50 and savings earns $1,104.98 over 5 years, so savings wins by $1,102.48. Over 5 years the savings interest is more than five times the 1-year interest, because the interest compounds.
Checking fee $12 a month: the checking fees are $144.00 over the year, so the checking net is $0.50 − $144.00 = -$143.50, and savings wins by $347.21. A $12 monthly fee costs more than the checking interest earns by a long way.
Savings fee $5 a month: the savings fees are $60.00 over the year, so the savings net is $203.71 − $60.00 = $143.71, and savings wins by $143.21. The fee eats $60.00 of the interest, but savings still wins.
Reverse — the other way round: the balance where the savings interest beats checking by $100 a year is $2,460.54; the savings APY needed to earn $500 of interest in 1 year on $5,000 is 9.57%; and the years for savings at 4% to earn $1,000 of interest on $5,000 is 4.57.
What the defaults assume
The model assumes the APYs stay the same for the whole term, no money is added or taken out, and the monthly fee is charged every month for the whole term. It assumes each APY is a nominal rate compounded monthly and shows the effective yield alongside it. It assumes no taxes on the interest and no minimum-balance rules — check the account terms, because savings accounts often need a minimum balance and limit withdrawals. It compares interest and fees only, not features: it does not score debit cards, bill pay, ATM access, or overdraft rules, and it does not say which account to use for spending. With a balance of $0 both nets are $0.00 and it is a tie. With 0 years both nets are $0.00 and it is a tie. With equal APYs both earn $203.71 and it is a tie. With a savings APY of 0% checking wins by $0.50. Rounding convention: all figures are computed from unrounded values, rounded only for display — money to cents, percents to two decimals, the reverses to two decimals with the exact value to four.
Output · formula · meaning
| Output | Formula | What it means |
|---|
| Checking future value | balance × (1 + checking monthly rate)12 × years | $5,000.50. |
| Checking interest | checking future value − balance | $0.50. |
| Checking fees total | checking monthly fee × 12 × years | $0.00. |
| Checking net | checking interest − checking fees | $0.50. |
| Checking monthly interest | checking interest ÷ (12 × years) | $0.04. |
| Checking effective yield | (1 + checking monthly rate)12 − 1 | 0.01% (exact 0.0100). |
| Savings future value | balance × (1 + savings monthly rate)12 × years | $5,203.71. |
| Savings interest | savings future value − balance | $203.71. |
| Savings fees total | savings monthly fee × 12 × years | $0.00. |
| Savings net | savings interest − savings fees | $203.71. |
| Savings monthly interest | savings interest ÷ (12 × years) | $16.98. |
| Savings effective yield | (1 + savings monthly rate)12 − 1 | 4.07% (exact 4.0742). |
| Winner | the account with the higher net | Savings wins. |
| Gap | |savings net − checking net| | $203.21. |
| Break-even balance for a $100/yr gap | $100 ÷ (savings growth factor − checking growth factor) | $2,460.54 (exact 2,460.5368). |
| Savings APY for $500 interest in 1 year | the savings APY that earns $500 of interest on $5,000 in 1 year | 9.57% (exact 9.5690). |
| Years for savings to earn $1,000 interest | the years for savings at 4% to earn $1,000 of interest on $5,000 | 4.57 (exact 4.5656). |
| Balance $0 | same model, $0 balance | Checking net $0.00, savings net $0.00, Tie. |
| Years 0 | same model, 0 years | Checking net $0.00, savings net $0.00, Tie. |
| Equal APYs | same model, both APYs 4.00% | Checking interest $203.71, savings interest $203.71, Tie, gap $0.00. |
| Savings APY 0% | same model, savings APY 0% | Checking net $0.50, savings net $0.00, Checking wins, gap $0.50. |
| Balance $1,000 | same model, $1,000 balance | Checking interest $0.10, savings interest $40.74, checking net $0.10, savings net $40.74, gap $40.64, Savings wins. |
| Balance $25,000 | same model, $25,000 balance | Checking interest $2.50, savings interest $1,018.54, checking net $2.50, savings net $1,018.54, gap $1,016.04, Savings wins. |
| Balance $10,000 | same model, $10,000 balance | Checking interest $1.00, savings interest $407.42, checking net $1.00, savings net $407.42, gap $406.42, Savings wins. |
| Checking APY 0.50% | same model, checking APY 0.50% | Checking interest $25.06, savings interest $203.71, checking net $25.06, savings net $203.71, gap $178.65, Savings wins. |
| Checking APY 0.00% | same model, checking APY 0.00% | Checking interest $0.00, savings interest $203.71, checking net $0.00, savings net $203.71, gap $203.71, Savings wins. |
| Savings APY 5.00% | same model, savings APY 5.00% | Checking interest $0.50, savings interest $255.81, checking net $0.50, savings net $255.81, gap $255.31, Savings wins. |
| Savings APY 2.00% | same model, savings APY 2.00% | Checking interest $0.50, savings interest $100.92, checking net $0.50, savings net $100.92, gap $100.42, Savings wins. |
| Years 5 | same model, 5 years | Checking interest $2.50, savings interest $1,104.98, checking net $2.50, savings net $1,104.98, gap $1,102.48, Savings wins. |
| Checking fee $12/mo | same model, checking fee $12 a month | Checking interest $0.50, savings interest $203.71, checking net -$143.50, savings net $203.71, gap $347.21, Savings wins. |
| Savings fee $5/mo | same model, savings fee $5 a month | Checking interest $0.50, savings interest $203.71, checking net $0.50, savings net $143.71, gap $143.21, Savings wins. |
Who uses this
- The saver with $5,000 sitting in checking: they learn checking earns $0.50 a year and savings earns $203.71 — so they know moving the money is worth $203.21 a year, and they check the $16.98 a month of savings interest before leaving it where it is.
- The saver with $25,000 to place: they learn savings earns $1,018.54 a year against checking’s $2.50 — so they know the gap is $1,016.04 a year, and they check the $2,460.54 balance where the gap first passes $100 a year before deciding the move is worth the effort.
- The saver paying a $12 monthly checking fee: they learn the fee costs $144.00 a year and the checking net is -$143.50 — so they know the account loses money every month, and they check the $347.21 gap before paying another month of fees.
- The saver offered a 0.50% high-yield checking account: they learn it earns $25.06 a year, against $203.71 in savings — so they know the better checking rate still loses by $178.65 a year, and they check the 9.57% savings APY that would earn $500 a year before chasing a rate.
Accuracy & limitations
The math is exact for the numbers you enter: each APY is a nominal rate compounded monthly, the future value is the balance grown month by month, the interest is the future value minus the balance, and the net is the interest minus the fees. What the model cannot do is know your real rates: check the APYs, because bank rates move and the rate you see today is not the rate you will earn in 5 years. It assumes the APYs stay fixed, no money is added or taken out, and the monthly fee is charged every month. It assumes no taxes on the interest and no minimum-balance rules. It compares interest and fees only, not features: it does not score debit cards, bill pay, ATM access, or overdraft rules, and it does not say which account to use for spending — checking is for spending and savings is for keeping. For how compounding grows any deposit, see compound growth calculator; for how much to save each month to hit a target, see savings goal calculator.
Cite this calculatorBright Side Kit. “Checking vs Savings Calculator: Interest & Fees 2026.” brightoolbox.com, 2026. Method: monthly rate i = APY ÷ 12; future value = balance × (1 + i)12 × years; interest = future value − balance; fees total = monthly fee × 12 × years; net = interest − fees; winner = higher net; gap = |savings net − checking net|; monthly interest = interest ÷ (12 × years); effective yield = (1 + i)12 − 1; APY is treated as a nominal rate compounded monthly. This compares the two account types on interest and fees, not on features. Defaults: $5,000 balance, checking APY 0.01%, savings APY 4.00%, 1 year, no fees → checking interest $0.50, savings interest $203.71, nets $0.50 and $203.71, savings wins by $203.21/yr, monthly interest $0.04 / $16.98, effective yields 0.01% / 4.07% (exact 4.0742%). Branches: balance $1,000 → savings $40.74, gap $40.64; balance $25,000 → savings $1,018.54, gap $1,016.04; balance $10,000 → savings $407.42, gap $406.42; checking APY 0.50% → checking $25.06, gap $178.65; checking APY 0.00% → checking $0.00, gap $203.71; savings APY 5.00% → savings $255.81, gap $255.31; savings APY 2.00% → savings $100.92, gap $100.42; years 5 → savings $1,104.98, gap $1,102.48; checking fee $12/mo → checking net -$143.50, gap $347.21; savings fee $5/mo → savings net $143.71, gap $143.21. Reverses: break-even balance for a $100/yr gap $2,460.54 (exact 2,460.5368); savings APY for $500 interest in 1 year 9.57% (exact 9.5690); years for savings at 4% to earn $1,000 interest 4.57 (exact 4.5656). Edges: balance $0 → tie, both nets $0.00; years 0 → tie, both nets $0.00; equal APYs → tie, both $203.71, gap $0.00; savings APY 0% → checking wins by $0.50. Bright Side Kit. "Checking vs Savings Calculator: Interest & Fees 2026." https://brightoolbox.com/checking-vs-savings/ Accessed October 25, 2026.
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