$21 an Hour Is How Much a Year?
- Federal income tax$3,0627.0%
- FICA — Social Security + Medicare$3,3427.6%
- Take-home pay$37,27785.3%
At 40 hours a week and 52 weeks a year — 2,080 paid hours — $21 an hour is $43,680 a year. Federal income tax and FICA take about $6,403, so you keep roughly $37,277 a year, or $3,106 a month and $1,434 per biweekly check. That is before any state income tax.
The same $21, at different hours
"How much a year" depends entirely on how many hours you actually get. The table below re-runs the whole calculation for each schedule instead of scaling the 40-hour answer, because federal tax is progressive: a 30-hour week lands in a lower bracket and keeps a bigger share of each dollar. Hours above 40 are paid at 1.5× under the FLSA.
| Hours a week | Weekly gross | Annual gross | Annual after tax | Monthly after tax |
|---|---|---|---|---|
| 20 | $420 | $21,840 | $19,595 | $1,633 |
| 30 | $630 | $32,760 | $28,503 | $2,375 |
| 35 | $735 | $38,220 | $32,890 | $2,741 |
| 40 (full time) | $840 | $43,680 | $37,277 | $3,106 |
| 45 (incl. OT) | $998 | $51,870 | $43,858 | $3,655 |
| 50 (incl. OT) | $1,155 | $60,060 | $50,438 | $4,203 |
| 55 (incl. OT) | $1,313 | $68,250 | $56,844 | $4,737 |
Overtime rows assume time-and-a-half above 40 hours, which is the federal floor. A union contract, a state law or a company policy can set a higher multiplier; none of them can set a lower one.
Where the $43,680 goes
| Line | Annual | Share of gross |
|---|---|---|
| Gross pay | $43,680 | 100.0% |
| Federal income tax | -$3,062 | 7.0% |
| Social Security | -$2,708 | 6.2% |
| Medicare | -$633 | 1.5% |
| Federal only state income tax | -$0 | 0.0% |
| Take-home pay | $37,277 | 85.3% |
Social Security is 6.2% of the first $184,500 of wages, so it stops mid-year for high earners and never stops at this level. Medicare is 1.5% with no cap. Federal income tax is progressive: with the $16,100 standard deduction, a single filer at this income sits in the 12.0% bracket at the margin, not at 14.7%.
State tax on $43,680: three reference states
State income tax is the one layer this page cannot settle for you, so here is the same salary in three states with very different rules — no income tax, a progressive coastal state, and a progressive state with city tax on top.
| State | State + local tax | Annual after everything | Monthly |
|---|---|---|---|
| Texas | None | $37,277 | $3,106 |
| California | $1,263 | $36,014 | $3,001 |
| New York | $1,762 | $35,515 | $2,960 |
The state rows link to the nearest salary page that exists for that state (the ladder runs in $25,000 steps at the bottom and $10,000 steps higher up). City taxes (New York City, for example) are added inside the state figure.
Overtime is where hourly pay actually compounds
At $21 an hour, 40 hours pays $840 a week. Five hours of overtime pays those five hours at $31.50 each, so a 45-hour week is $998 — $158 more than the same job at 40 hours. A 50-hour week is $1,155, which is 37.5% more gross for 25.0% more hours.
Two catches. First, overtime is paid on hours actually worked, so a salary offer of $43,680 for the same job is not the same deal if you regularly work 45 hours — as an exempt salaried employee you would get nothing extra for those five. Second, overtime is ordinary wages for tax purposes: it pushes you up the brackets, so the 37.5% gross premium does not translate into the same percentage of take-home.
What unpaid weeks do to the yearly number
| Paid weeks | Annual gross | Annual after tax | Difference from 52 weeks |
|---|---|---|---|
| 52 | $43,680 | $37,277 | — |
| 50 | $42,000 | $35,927 | −$1,350 |
| 48 | $40,320 | $34,577 | −$2,700 |
Hourly work has no paid vacation by default. Two weeks unpaid costs $1,350 of take-home, not $1,680 of gross — the tax you no longer owe comes back to you.
Nearby hourly rates
Questions people ask about $21 an hour
Is $21 an hour a good wage?
This page does arithmetic, not judgement. What it can tell you: $43,680 a year before tax, $37,277 after federal tax and FICA, $3,106 a month. Whether that is enough depends on rent where you live and how many hours you actually get — and hourly work has no paid time off, so the yearly figure assumes you are paid for all 52 weeks.
How many hours is "a year" at $21 an hour?
2,080 hours, from 40 hours a week times 52 weeks. That convention is why 40-hour payroll is usually quoted as 2,080 hours a year, and why a full-time salary divided by 2,080 gives the hourly equivalent.
Does $21 an hour become a different number with overtime?
Yes, and the table above shows both. Five hours of overtime a week at 1.5× adds $158 a week, or $8,190 a year before tax. Nothing in the tax code treats overtime differently — it is ordinary wages, taxed at the margin.
Why is the after-tax number different from what my paycheck shows?
Three usual reasons: your state withholds its own income tax (this page is federal-only until the state table further up), you contribute to a 401(k) or an HSA, or your W-4 asks for extra withholding. The $24,500 401(k) limit for the year matters most: pre-tax contributions cut federal taxable income but not Social Security or Medicare.
What is $21 an hour in monthly and biweekly terms?
Monthly gross is $3,640 and monthly take-home is $3,106. Biweekly gross is $1,680 and biweekly take-home is $1,434 — that is the number that matches most pay stubs, since 26 checks a year is not 24.
Sources
- IRS Publication 15 (Circular E) — federal withholding tables and FICA rates.
- Social Security Administration — annual wage base for Social Security withholding.
- US Department of Labor, Wage and Hour Division — FLSA overtime at 1.5× above 40 hours.
- State income tax brackets from each state's published 2026 table; the three states above are linked, and all 51 jurisdictions are in the state index.
Single filer, standard deduction, no pre-tax contributions, no credits beyond the standard deduction. Educational estimate, not tax advice.