$18 an Hour Is How Much a Year After Taxes in Idaho?
Full time, $18 an hour is $37,440 a year before taxes. After 2026 federal, Idaho, and FICA taxes, a single filer in Idaho takes home about $31,387 a year: $2,616 a month, or $15.09 for each hour worked.
Take-home pay on $18/hour full-time in Idaho (single filer, 2026)
- Per year
- $31,387
- Per month
- $2,616
- Every 2 weeks
- $1,207
- Per hour
- $15.09
Total tax $6,053 · effective rate 16.2% · federal bracket 12%
$18 an hour before and after taxes
| Period | Before tax | After tax |
|---|---|---|
| Hourly | $18.00 | $15.09 |
| Daily (8 hours) | $144.00 | $120.72 |
| Weekly (40 hours) | $720 | $604 |
| Biweekly | $1,440 | $1,207 |
| Semimonthly | $1,560 | $1,308 |
| Monthly | $3,120 | $2,616 |
| Yearly | $37,440 | $31,387 |
Where the taxes go
| Item | Year | Month | Biweekly |
|---|---|---|---|
| Gross pay | $37,440 | $3,120 | $1,440 |
| Federal income tax | -$2,313 | -$193 | -$89 |
| Idaho income tax | -$876 | -$73 | -$34 |
| Social Security (6.2%) | -$2,321 | -$193 | -$89 |
| Medicare (1.45%) | -$543 | -$45 | -$21 |
| Take-home pay | $31,387 | $2,616 | $1,207 |
How $18 an hour is taxed in Idaho
Full time, $18 an hour is $37,440 a year (2,080 hours). Here is how each tax on that income is calculated.
1. Federal income tax: $2,313
Start with $37,440 of wages and subtract the $16,100 standard deduction. That leaves $21,340 of taxable income, taxed in brackets:
| Taxable income band | Rate | Income taxed | Tax |
|---|---|---|---|
| $0 to $12,400 | 10% | $12,400 | $1,240 |
| $12,400 to $50,400 | 12% | $8,940 | $1,073 |
| Federal income tax | $2,313 | ||
2. Idaho income tax: $876
Idaho starts from federal taxable income, $21,340. That leaves $21,340 of Idaho taxable income.
| Taxable income band | Rate | Income taxed | Tax |
|---|---|---|---|
| $0 to $4,811 | 0% | $4,811 | $0 |
| Over $4,811 | 5.3% | $16,529 | $876 |
| Idaho income tax | $876 | ||
3. Social Security and Medicare: $2,864
Social Security is 6.2% of wages up to the $184,500 wage base ($2,321), and Medicare is 1.45% of all wages ($543).
Result: $37,440 minus $6,053 in total tax leaves $31,387 a year, an effective tax rate of 16.2%.
What this income means in Idaho
Because Idaho starts from federal taxable income, a lower earner gets both the $16,100 federal deduction and the 0% band on the next $4,811. A single filer earning $30,000 owes just $482 to Idaho and takes home $25,803. At $50,000 the bill is $1,542, an effective 3.08%, and take-home pay is $40,813, about $3,401 a month. A full-time worker at $41,600 a year keeps $34,509. File a return to collect the refundable grocery credit.
More in the Idaho paycheck guide.
Part-time and overtime at $18 an hour
| Schedule | Yearly gross | Take-home | Tax rate |
|---|---|---|---|
| 20 hours/week | $18,720 | $17,026 | 9.1% |
| 30 hours/week | $28,080 | $24,354 | 13.3% |
| 40 hours/week | $37,440 | $31,387 | 16.2% |
| 40 hours + 5 overtime | $44,460 | $36,656 | 17.6% |
Overtime is shown at time and a half ($27.00/hour) with normal withholding. For 2025 through 2028, eligible workers can also deduct the premium half of qualified overtime pay on their federal return (up to $12,500, or $25,000 filing jointly), which is not reflected in paycheck withholding.
$18 an hour in nearby states
Idaho ranks 24th of 51 for take-home pay at this wage. See $18 an hour after taxes in every state.
| State | State tax | Take-home | vs Idaho |
|---|---|---|---|
| Montana | $1,003 | $31,260 | -$127 |
| Wyoming | $0 | $32,263 | +$876 |
| Utah | $944 | $31,319 | -$68 |
| Nevada | $0 | $32,263 | +$876 |
| Oregon | $2,237 | $30,026 | -$1,361 |
| Washington | $0 | $32,263 | +$876 |
| Texas | $0 | $32,263 | +$876 |
| Florida | $0 | $32,263 | +$876 |
Use your exact hours
Convert other hours and wages with the hourly-to-salary calculator, or add deductions in the Idaho paycheck calculator.
$18 an hour in Idaho: FAQ
$18 an hour is how much a year after taxes in Idaho?
Working 40 hours a week, $18 an hour is $37,440 a year before taxes. After federal, Idaho, and FICA taxes, a single filer takes home about $31,387 a year, or $15.09 for every hour worked.
How much is $18 an hour per month after taxes in Idaho?
About $2,616 a month after taxes ($3,120 before taxes). A biweekly paycheck is about $1,207 and a weekly paycheck about $604.
How much is $18 an hour part-time in Idaho?
At 20 hours a week, $18 an hour is $18,720 a year, and take-home pay is about $17,026 ($1,419 a month). Lower annual income means a lower effective tax rate: 9.1% versus 16.2% full-time.
How is overtime taxed at $18 an hour?
Overtime is paid at $27.00 an hour (time and a half). Five overtime hours every week would raise yearly gross pay to $44,460 and take-home to about $36,656. Federal law for 2025-2028 also lets eligible workers deduct the premium half of qualified overtime pay (up to $12,500, or $25,000 filing jointly, phasing out above $150,000 of income) when they file, which can mean a refund even though withholding is unchanged.