What is Idaho's income tax rate in 2026?

Idaho uses a flat 5.695% state income tax rate. It applies to your income after deductions, having replaced Idaho's former graduated brackets with a single flat rate.

How is Idaho take-home pay calculated?

Take-home equals gross minus federal income tax (2026 progressive brackets), Idaho's 5.695% flat state tax, Social Security (6.2% up to the $176,100 wage base) and Medicare (1.45%). The federal standard deduction is $15,750 single or $31,500 married filing jointly.

Does Idaho tax Social Security benefits?

Idaho does not tax Social Security retirement benefits, but this calculator models wage income, where the 5.695% flat rate applies to your taxable salary after the standard deduction.

Is this calculator exact?

It is a close estimate. It applies the headline 2026 federal brackets, the standard deduction, Idaho's 5.695% flat rate and FICA, but excludes 401(k) contributions, itemized deductions, credits and other adjustments.

Idaho Take-Home Pay Calculator

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Idaho take-home pay calculator

Estimate your Idaho net pay after taxes. Idaho applies a single flat 5.695% state income tax rate, and this tool combines that with the 2026 federal income-tax brackets and FICA so you can see your real monthly and annual take-home pay.

How it works

The calculator subtracts four things from your gross salary. Federal income tax is charged on gross − standard deduction ($15,750 single, $31,500 married filing jointly) using the 2026 progressive brackets, so only the slice of income inside each band is taxed at that band’s rate. Idaho state tax is a flat 5.695% applied to income after the same standard deduction. FICA adds Social Security at 6.2% up to the $176,100 wage base, plus Medicare at 1.45% on all wages. Net pay is gross minus all four.

Example

A single Idaho worker earning $75,000: taxable income is $75,000 − $15,750 = $59,250. Federal tax across the 10%, 12% and 22% bands is about $7,747. Idaho state tax is 5.695% of $59,250 = $3,374. Social Security is $4,650 and Medicare is $1,088. Total tax is roughly $16,859, leaving take-home pay near $58,141 a year, about $4,845/month, an effective rate of about 22.5%.

Notes

Estimate only — not financial or tax advice. Figures use 2026 IRS federal brackets, the federal standard deduction, the Idaho State Tax Commission’s 5.695% flat rate and 2026 FICA limits. Pre-tax retirement contributions, itemized deductions, credits and other adjustments are not modelled. All math runs in your browser.