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Idaho Paycheck Calculator (2026)

Estimate your Idaho take-home pay after federal tax, FICA, and Idaho state income tax (flat 5.3%). No local tax and no second Idaho payroll tax.

How this calculator works

Like our other paycheck calculators, this estimates federal tax and FICA the same way regardless of state. On top of that, it applies Idaho’s flat 5.3% state income tax to your Idaho taxable income: your federal-taxable wages, minus Idaho’s own standard deduction (which now matches the federal standard deduction), minus a small additional zero-rate threshold Idaho’s tax statute carves out before the 5.3% rate begins.

Idaho has no second state-level payroll tax like Colorado’s FAMLI premium or Connecticut’s Paid Leave contribution, and no local or municipal income tax anywhere in the state, so Idaho’s state-tax line is a single number.

The formula

(federal tax, FICA, and net-pay assembly are identical to the Colorado calculator)

idTaxableIncome = max(0, wagesAfterPretax − idahoStandardDeduction)
                (matches the federal standard deduction: $16,100 single/MFS, $32,200 joint)
idTaxAboveThreshold = max(0, idTaxableIncome − zeroRateThreshold)
                (zeroRateThreshold: $2,500 single/MFS, $5,000 joint)
idIncomeTax = idTaxAboveThreshold x 5.3%

stateTax = idIncomeTax

Worked example

A single filer earning $60,000/year, paid biweekly, with no 401(k) or extra deductions:

  • FICA: $4,590.00/year (6.2% + 1.45% of $60,000, same as any state)
  • Federal tax: $5,020.00/year ($60,000 minus $16,100 standard deduction = $43,900 taxable, same as any state)
  • Idaho taxable income: $60,000 minus $16,100 standard deduction = $43,900
  • Above the $2,500 zero-rate threshold: $41,400 x 5.3% = $2,194.20/year
  • Net pay: $60,000 minus $4,590.00 minus $5,020.00 minus $2,194.20 = $48,195.80/year, or $1,853.68 per biweekly paycheck

We cross-checked the income-tax portion against SmartAsset’s Idaho Paycheck Calculator for the same inputs (accessed 2026-08-25). Its “State Income” line of $85/paycheck annualizes to $2,210/year, within $15.80 (about 0.7%) of our $2,194.20 figure, a gap consistent with the difference between SmartAsset’s allowance-based withholding-table estimate and this calculator’s exact annual-liability model.

Frequently asked questions (FAQ)

What is Idaho's 2026 state income tax rate?

A flat 5.3% on Idaho taxable income above a small zero-rate threshold, the same rate for every filer regardless of income. Idaho cut its rate from 5.695% to 5.3% in 2025 under House Bill 40, described by the governor as the largest income tax cut in state history, and the rate has stayed at 5.3% for 2026.

Does Idaho have its own standard deduction, or does it use the federal one?

Idaho has its own standard deduction written into state law, but as of a February 2026 conformity bill, it matches the federal standard deduction. This calculator uses the same federal 2026 figure ($16,100 single, $32,200 married filing jointly) as Idaho's own deduction, since Idaho now tracks federal changes on an ongoing basis.

What is the $2,500 (or $5,000 for joint filers) threshold I've seen mentioned for Idaho taxes?

Idaho's tax rate statute exempts the first $2,500 of Idaho taxable income from tax for single filers ($5,000 for joint filers), on top of the standard deduction, before the 5.3% rate applies to the rest. This calculator uses that statutory figure directly, cross-checked against a live paycheck calculator for accuracy.

Does Idaho have a state disability insurance or paid family leave payroll tax?

No. Unlike California, Colorado, New Jersey, New York, and a handful of other states, Idaho does not operate any mandatory employee-paid disability or paid-family-leave program. Idaho unemployment insurance is funded entirely by employers, so Idaho income tax is the only state-level deduction this calculator applies.

Does any Idaho city or county have its own local income tax?

No. Idaho has no local or municipal income tax anywhere in the state, unlike Pennsylvania, Ohio, Michigan, or Indiana, where cities and counties often levy their own income tax on top of the state rate. Your take-home pay in Idaho depends only on federal tax, FICA, and the flat state rate.

Does contributing to a 401(k) lower my Idaho state tax the way it lowers my federal tax?

Yes. Idaho taxable income starts from the same federal-taxable-wages figure used for your federal tax, which is already reduced by your 401(k) elective deferrals. Contributing more to a 401(k) lowers both your federal and your Idaho taxable income by the same dollar amount.

Why is my actual Idaho paycheck different from this calculator's estimate?

This calculator spreads your estimated annual tax liability evenly across paychecks, while employers use IRS and Idaho withholding tables built around W-4 allowances, which don't produce identical per-paycheck amounts. It also excludes any employer-specific benefit elections not entered here.

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