$18 an hour after taxes in Idaho
$18 an hour is $37,440 a year before tax at 40 hours a week. After 2026 federal, FICA and Idaho taxes:
You keep
$31,377
a year after taxes
- Every two weeks
- $1,207
- A month
- $2,615
- Effective tax rate
- 16.2%
ID A flat 5.3% income tax
| Line | Every two weeks | Year |
|---|---|---|
GROSS Gross pay |
$1,440.00 | $37,440.00 |
FED Federal income tax |
-$88.95 | -$2,312.80 |
OASDI Social Security tax |
-$89.28 | -$2,321.28 |
MED Medicare tax |
-$20.88 | -$542.88 |
ST Idaho income tax |
-$34.08 | -$886.04 |
NET Take-home pay | $1,206.81 | $31,377.00 |
$18 an hour per paycheck, month and day in Idaho
| Period | Gross | Taxes | Take-home |
|---|---|---|---|
| Year | $37,440 | -$6,063 | $31,377 |
| Month | $3,120 | -$505 | $2,615 |
| Every two weeks | $1,440 | -$233 | $1,207 |
| Week | $720 | -$117 | $603 |
| Day | $144 | -$23 | $121 |
Biweekly means 26 paychecks a year. A day is one of 260 working days (five a week). "Taxes and deductions" includes every line on the stub above.
If you work more or fewer hours
| Hours a week | Yearly gross | Yearly take-home |
|---|---|---|
| 20 | $18,720 | $17,026 |
| 25 | $23,400 | $20,738 |
| 30 | $28,080 | $24,344 |
| 35 | $32,760 | $27,865 |
| 40 | $37,440 | $31,377 |
| 45 (5 overtime) | $44,460 | $36,926 |
| 50 (10 overtime) | $51,480 | $42,476 |
From 2026, federal income tax exempts the overtime premium (the extra half of time-and-a-half) up to $12,500 a year for single filers. Social Security, Medicare and Idaho tax still apply to it in this estimate.
What $18 an hour affords in Idaho
- Rent at 30% of gross pay
- $936 a month
- Needs (50% of take-home)
- $1,307 a month
- Wants (30%)
- $784 a month
- Savings and debt (20%)
- $523 a month
The 30% rule is the benchmark HUD uses for housing cost burden. The 50/30/20 split applies to the $2,615 monthly take-home figure above.
How Idaho compares
Idaho taxes wages at a flat 5.3%. On $18 an hour ($37,440 a year) the state takes $886 in income tax (2.4% of gross), the 21st lowest of 51 jurisdictions.
| State | State taxes | Take-home a year |
|---|---|---|
| Idaho | $886 | $31,377 |
| Montana | $1,003 | $31,260 |
| Nevada | $0 | $32,263 |
| Oregon | $2,522 | $29,741 |
| Utah | $944 | $31,319 |
| Washington | $519 | $31,744 |
| Wyoming | $0 | $32,263 |
Questions people ask about $18 an hour in Idaho
How much is $18 an hour a year after taxes in Idaho?
Working 40 hours a week for 52 weeks, $18 an hour is $37,440 before tax. After $2,313 federal income tax, $2,864 Social Security and Medicare, and $886 in Idaho state taxes, you take home $31,377 a year as a single filer in 2026.
How much is $18 an hour biweekly after taxes in Idaho?
$18 an hour is $1,440 gross every two weeks. After taxes a biweekly paycheck comes to about $1,207.
$18 an hour is how much a month?
$18 an hour is $3,120 a month before tax and about $2,615 after tax in Idaho, averaged over 12 months.
How much rent can I afford on $18 an hour?
The 30% rule puts rent at $936 a month on $3,120 gross. Budgeting from take-home pay with 50/30/20, all needs including rent get $1,307.
How much is $18 an hour with overtime in Idaho?
At 50 hours a week (10 hours at $27.00), you earn $51,480 a year and keep $42,476. The 2026 federal overtime deduction takes $4,680 of overtime premium out of federal taxable income; Social Security and Medicare still apply.
How much Idaho state tax comes out of $18 an hour?
$886 a year, or $34 per biweekly paycheck, in Idaho income tax. Local income taxes, where they exist, are not included.
Try your own numbers
Sources and assumptions
Tax year 2026. Annual tax for a filer with no dependents, no other income and no credits, working 52 weeks. Hours over 40 a week are paid at 1.5×. Local income taxes are not included. How we calculate.
- IRS Revenue Procedure 2025-32: federal brackets and standard deduction (retrieved 2026-09-26)
- Social Security Administration: 2026 wage base; IRS: Medicare and Additional Medicare Tax
- Idaho tax source (retrieved 2026-09-26; some 2026 amounts projected until the state publishes them, see the data notes)