How to Calculate the Cost of Raising a Child to Age 18

What raising a child costs

Ask ten parents what raising a child costs and you will get ten different answers — the grocery bill, the childcare invoice, the bigger rent. The USDA asked a different question: add up everything a middle-income married couple with two children spends on one child, from birth through age 17, and what is the total? The answer, in the USDA’s 2015 report, is $233,610.00 — $12,978.33 a year, $1,081.53 a month, $35.56 a day. Low-income families spend $174,690.00 and high-income families $372,210.00. This guide works through the five steps that turn those totals into your number — and shows you what the number leaves out.

Step 1: Pick your income band

The USDA publishes three totals because the cost of a child depends on the household around it. Low-income families spend $174,690.00 from birth to 18, middle-income families $233,610.00, and high-income families $372,210.00. The gap is mostly housing and childcare: a high-income family pays more for a bigger home in a pricier school district and for dearer childcare and education. Pick the band that matches your household — most families land in the middle, and the middle total is the one this guide works through. If you are between bands, run both and take the range.

Step 2: Divide by 18

The total runs birth through age 17 — eighteen years of spending. Divide the band total by 18 and you have the annual cost. $233,610.00 ÷ 18 = $12,978.33 a year. Divide again by 12 for the monthly cost — $1,081.53 a month — and by 365 for the daily cost — $35.56 a day. The low-income annual cost is $9,705.00 and the high-income annual cost is $20,678.33. One division is the whole calculation; everything after it is refinement.

Step 3: Multiply for extra children

A second child does not cost as much as the first. They share bedrooms, hand down clothes, and eat in bulk — so the USDA counts each additional child at 78% of the first. The multi-child factor is 1 + 0.78 × (children − 1): two children cost 1.78 times one child, or $415,825.80 in total, and three children cost 2.56 times, or $598,041.60. Three children is also the first count whose total passes $500,000 — two children cost $415,825.80, below the line.

Step 4: Subtract the years already lived

The annual cost does not change with age — only the years left change. Multiply the annual cost by the years remaining, 18 minus the child’s age, and you have the cost still to come. At age 10 there are 8 years left, so the remaining cost is $12,978.33 × 8 = $103,826.67, and $129,783.33 is already spent. At age 15 there are 3 years left: $38,935.00 to come, $194,675.00 spent. The halfway point is age 9 — $116,805.00 spent and $116,805.00 remaining, exactly half the total either way.

Step 5: Compare with the 2022-adjusted basis

The USDA stopped publishing the report after the 2017 edition, so the 2015 figures are the latest official ones — but prices have moved since. Brookings updated the middle total to $310,605.00 in 2022, and the calculator applies the same multiplier, 310,605/233,610, to every band: the 2022-adjusted low total is $232,265.69 and the high total is $494,885.87. The 2022 annual cost is the straight $310,605.00 ÷ 18 = $17,255.83 a year. Brookings itself reports an average of $18,271 a year, which is its inflation-projected average rather than the straight division — the two numbers answer slightly different questions, so the calculator quotes the division.

The worked example

$233,610.00 total, middle income, one child, age 0, 2015 dollars. Annual: $233,610.00 ÷ 18 = $12,978.33. Monthly: $12,978.33 ÷ 12 = $1,081.53. Daily: $12,978.33 ÷ 365 = $35.56. Remaining: $12,978.33 × 18 = $233,610.00. Spent: $12,978.33 × 0 = $0.00. Housing, the biggest slice at 29%, is $3,763.72 a year; childcare and education is $2,336.10; food is $2,076.53. Totals are computed from unrounded values, so rounded parts may differ by a cent from their rounded sum.

Working backwards

A $15,000-a-year budget needs a total of $270,000.00 — $15,000 × 18. The remaining cost first drops below $100,000 at age 11, when $90,848.33 is left; at age 10 it is still $103,826.67. Three children is the first count over $500,000. To cover a $200,000 remaining cost over 10 years you need $1,666.67/mo — though the rounded figure actually forwards to $200,000.40, forty cents over. The 2022-adjusted low total is $232,265.69. And the halfway point, where spent equals remaining, is age 9.

When the numbers change

At high income the annual cost is $20,678.33 and the total is $372,210.00. In 2022 dollars the middle annual cost is $17,255.83. At age 17 there is one year left: $12,978.33 to come, $220,631.67 spent. With six children the factor is 4.90 and the total is $1,144,689.00 — $63,593.83 a year. With two children in 2022 dollars the total is $552,876.90.

What the number leaves out

The total excludes college, prenatal care, and lost income from reduced work hours — three of the biggest costs of raising a child, and the three the USDA could not measure cleanly. It is a national average for a married couple with two children, so single-parent and one-child families differ, and it assumes the annual cost is flat across ages when in reality childcare is dearest early and food, transport and activities grow as the child grows. Treat it as a budget anchor, not a bill.

How this connects

Run your own numbers with the cost of raising a child calculator; for the college costs this total excludes, see the 529 plan vs Roth IRA for college comparison.