Idaho Income Tax Calculator (2026 Federal + State)
Flat 5.3% state rate — combined tax on $75k is about $11,645
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7/16/2026
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Your Details
Your pay before any taxes or deductions, for the frequency you picked.
Deductions
401(k), HSA, and pre-tax health premiums. Lowers income tax (401k is still subject to FICA).
Optional. Leave at 0 to use your state's 2026 rate. Graduated states use an estimated effective rate — adjust here for precision.
Pre-set to Idaho. Adjust your salary, filing status, and deductions — federal, state, and FICA tax update instantly.
How Income Tax Works in Idaho (2026)
Idaho levies a flat 5.3% state income tax in 2026 — the same rate for every dollar of taxable income. On top of federal tax, a single filer earning $75,000 pays about $3,975 in Idaho state income tax, bringing the combined federal + state income tax bill to roughly $11,645. That's an effective income tax rate of about 15.5%.
A flat tax has a clear advantage for budgeting: a raise never pushes any of your income into a higher state bracket. Every extra dollar earned in Idaho is taxed at the same 5.3% at the state level. The 5.3% rate is above the 4.8% average among states that tax income.
Idaho income tax by salary level (2026, single filer)
| Gross salary | Federal tax | State tax | Total income tax | Effective rate | After-tax income |
|---|---|---|---|---|---|
| $40,000 | $2,620 | $2,120 | $4,740 | 11.8% | $32,200 |
| $60,000 | $5,020 | $3,180 | $8,200 | 13.7% | $47,210 |
| $75,000 | $7,670 | $3,975 | $11,645 | 15.5% | $57,618 |
| $100,000 | $13,170 | $5,300 | $18,470 | 18.5% | $73,880 |
| $150,000 | $24,734 | $7,950 | $32,684 | 21.8% | $105,841 |
| $200,000 | $36,734 | $10,600 | $47,334 | 23.7% | $138,327 |
Single filer, standard deduction, no pre-tax deductions. After-tax income includes FICA deductions. 2026 federal brackets per IRS Rev. Proc. 2025-32.
Beyond your income tax
See your paycheck breakdown by pay period with the Idaho Paycheck Calculator. For capital gains on investments, use the Capital Gains Tax Calculator. Freelancers and contractors can estimate self-employment tax with the Self-Employment Tax Calculator. Planning a home purchase? The Home Affordability Calculator factors in your after-tax income.
Compare Idaho income tax with nearby states
- Washington income tax calculator — no state income tax
- Oregon income tax calculator — graduated (~8.0%)
- Montana income tax calculator — graduated (~5.9%)
- Utah income tax calculator — flat 4.5%
See all 50 states on the Income Tax Calculator hub.
Frequently asked questions
What is the income tax rate in Idaho for 2026?
Idaho has a flat 5.3% state income tax rate in 2026, applied to all taxable income regardless of amount.
How much income tax do I pay on $75,000 in Idaho?
A single filer earning $75,000 in Idaho pays approximately $11,645 in combined federal and state income tax for 2026 — an effective income tax rate of about 15.5%. Adding FICA (Social Security + Medicare) brings total tax to about $17,383.
How does Idaho's income tax compare to other states?
Idaho's flat rate of about 5.3% is above the 4.8% average among states that tax income. Use the comparison links below to see specific neighboring states.
Does Idaho really tax groceries?
Yes, groceries are subject to Idaho sales tax, but residents claim a grocery tax credit on their state return that offsets much of it — an unusual rebate-style approach compared with states that simply exempt food.
Methodology & sources
Federal tax uses 2026 IRS brackets and standard deductions (Revenue Procedure 2025-32). State tax rates reflect 2026 law from the Tax Foundation and state revenue departments; graduated-state figures are estimated effective rates. FICA uses the 2026 Social Security wage base of $184,500 (6.2%) plus Medicare (1.45%). Local city or county taxes (e.g. NYC, Portland) are not included. Estimates for planning only, not tax advice. See our editorial policy for how we verify formulas.