$18 an hour is $37,440 a year before tax, and about $31,492 after modelled 2026 tax for a single filer in Iowa.
Single filer, no pre-tax deductions, 40 hours a week for 52 weeks.
| Category | Annual | Monthly | Per hour | Share of gross |
|---|---|---|---|---|
| Gross pay | $37,440 | $3,120 | $18.00 | 100% |
| Federal income tax | $2,313 | $193 | $1.11 | 6.2% |
| Social Security | $2,321 | $193 | $1.12 | 6.2% |
| Medicare | $543 | $45 | $0.26 | 1.5% |
| Iowa income tax | $771 | $64 | $0.37 | 2.1% |
| Estimated take-home | $31,492 | $2,624 | $15.14 | 84.1% |
Across 2,080 paid hours a year at 40 hours a week. State income tax only — local and municipal taxes are excluded.
The $16,100 standard deduction leaves $21,340 of taxable income, which puts the last dollar in the 12% federal bracket. Only $8,940 of it is actually taxed at 12% — the income below $12,400 is taxed at the lower rates first, which is why the effective rate lands well under the bracket number. The 12% band runs to $50,400, so a raise of about $29,060 would be needed before any dollar is taxed at 22%.
Iowa taxes wage income at a single 3.8% rate rather than a graduated schedule, so the state share does not change shape as the salary rises. After $16,100 of deductions the state taxes $21,340, producing $771 — 2.06% of gross pay.
Federal income tax of $2,313 on $37,440 of gross pay is 6.18% of the salary, against a 12% marginal bracket — a gap of about 5.8 points. The bracket describes the next dollar earned, not the pay already earned, and quoting the bracket as the tax rate overstates the bill by $2,180 at this salary.
A dollar more an hour is $2,080 more a year at 2,080 paid hours. Against a combined marginal rate of about 23.45% -- the 12% federal band, Iowa's 3.8%, 1.45% Medicare and 6.2% Social Security -- roughly $1,592 of that reaches the bank, or about $0.77 of the extra dollar.
$18 an hour across 52 weeks, at different weekly hours.
| Hours a week | Per week | Per year |
|---|---|---|
| 20 hours | $360 | $18,720 |
| 25 hours | $450 | $23,400 |
| 30 hours | $540 | $28,080 |
| 35 hours | $630 | $32,760 |
| 40 hours | $720 | $37,440 |
| 45 hours | $810 | $42,120 |
| 50 hours | $900 | $46,800 |
$18 an hour in Iowa works out to about $31,492 a year after modelled 2026 federal, FICA, and state tax for a single filer — roughly $15.14 for every hour worked.
$18 an hour is $37,440 a year before tax at 40 hours a week for 52 weeks.
About 15.9% of gross pay, combining federal, FICA, and Iowa state tax for a single filer with no pre-tax deductions.
40 paid hours a week for 52 weeks, with no unpaid leave or overtime premium. Take-home is a 2026 estimate for a single filer with no pre-tax deductions and excludes local taxes.
Iowa’s tax treatment traces to Iowa DOR — 2026 withholding formula. Sources were reviewed through August 9, 2026.
Read the calculation methodology