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Idaho Paycheck Calculator

Calculate your Idaho take-home pay after the flat 5.3% state income tax, federal taxes, and FICA. Free 2026 Idaho paycheck calculator.

Pay details

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Net pay per paycheck

$1,899.35

Gross pay per paycheck

$2,500.00

Net annual income

$49,383.03

Paycheck breakdown

  • Take-home pay$49,383.0376.0%
  • Federal + FICA$10,202.5015.7%
  • Idaho state tax$2,164.473.3%

Annual tax breakdown

Federal income tax$5,230.00
Social Security$4,030.00
Medicare$942.50
Idaho state tax$2,164.47
Total tax withheld$12,366.97

Tax rates

Federal marginal rate12.0%
Idaho marginal rate5.3%
Effective tax rate19.0%
Federal brackets, standard deductions, FICA rates, and Idaho tax tables reflect the 2026 tax year. Actual paycheck withholding depends on your W-4, local taxes, and employer payroll settings.
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How the Idaho paycheck calculator works

Idaho uses a flat 5.3% state income tax on taxable income above a filing-status threshold. Income below the threshold is not taxed at the state level. This calculator estimates your 2026 take-home pay after federal withholding, FICA payroll taxes, and Idaho state tax. All calculations run locally in your browser.

For a full federal tax breakdown, open the income tax calculator. To isolate Social Security and Medicare amounts, use the FICA tax calculator. To compare with a neighboring no-tax state, see the Alaska paycheck calculator.

What gets withheld from an Idaho paycheck

A typical Idaho W-2 paycheck includes federal tax, FICA, state tax above the threshold, and voluntary deductions:

  • Federal income tax: Calculated from 2026 IRS brackets, your W-4 filing status, and qualifying child tax credits.
  • FICA taxes: Social Security at 6.2% (capped at the 2026 wage base of $184,500) and Medicare at 1.45%, with an additional 0.9% on wages above $200,000 for single filers.
  • Idaho state income tax: A flat 5.3% applied to federally taxable wages above $4,811 (single) or $9,622 (married filing jointly or head of household).

Idaho flat tax with income threshold

Idaho state tax uses federally taxable wages as its base. If that amount is below the threshold, no state tax is owed:

ID Tax=max⁡(0, Federal Taxable−T)×5.3%\mathrm{ID\ Tax} = \max(0,\ \mathrm{Federal\ Taxable} - T) \times 5.3\%

T is the Idaho threshold: $4,811 for single filers and $9,622 for married filing jointly or head of household. Federal taxable wages equal gross salary minus pre-tax 401(k) contributions minus the 2026 federal standard deduction.

Federal Taxable=max⁡(0, Gross−Pre-tax 401(k)−Federal Standard Deduction)\mathrm{Federal\ Taxable} = \max(0,\ \mathrm{Gross} - \mathrm{Pre\text{-}tax\ 401(k)} - \mathrm{Federal\ Standard\ Deduction})

Worked example: $65,000 salary, single, bi-weekly, 5% 401(k)

A single Idaho employee earning $65,000 per year, paid bi-weekly, contributing 5% to a traditional 401(k), with no dependents:

  1. Pre-tax 401(k): $65,000 x 5% = $3,250 per year.
  2. Federal taxable wages: $65,000 - $3,250 - $16,100 (federal standard deduction) = $45,650.
  3. Idaho state tax: ($45,650 - $4,811) x 5.3% = $2,162.87 per year.
  4. Estimated net per paycheck: About $1,899.35 bi-weekly after all withholdings.

The biweekly pay calculator shows how gross and net amounts spread across 26 paychecks. The salary calculator converts between hourly wages and annual compensation. For a flat-tax comparison, try the Colorado paycheck calculator.

Frequently asked questions

What is the Idaho state income tax rate for 2026?
Idaho applies a flat 5.3% rate on federally taxable income above the filing-status threshold. Income below the threshold is not taxed at the state level.
What is the Idaho income threshold?
Single filers pay no Idaho tax on federally taxable income up to $4,811. Married filing jointly and head of household filers have a $9,622 threshold.
Do 401(k) contributions reduce Idaho state tax?
Yes. Traditional 401(k) deferrals lower federally taxable wages, which reduces Idaho state withholding. They do not reduce FICA taxes.
What tax year does this calculator use?
Federal brackets, standard deductions, FICA limits, and Idaho state rates reflect the 2026 tax year.
Does Idaho have local income taxes?
Idaho does not permit city or county income taxes. State withholding is the only income tax on your paycheck.
Are the results stored on a server?
No. All math runs in your browser. Changing inputs updates the page URL so you can share your scenario.

Resources and references

The formulas and methods in this calculator were checked against these independent sources.