Idaho Income Tax Calculator 2026

Calculate your Idaho state income tax for 2026. Idaho has a flat 0.053% income tax rate.

$
Deduction

Federal Income Tax

$7,670.00

Effective Tax Rate

10.23%

Marginal Tax Rate

22%

FICA (SS + Medicare)

$5,737.50

Total Tax Burden

$13,407.50

After-Tax Income

$61,592.50

Tax Calculation Breakdown

Gross Income$75,000.00
Above-the-Line Deductions- $0.00
Adjusted Gross Income (AGI)$75,000.00
Standard Deduction- $16,100.00
Taxable Income$58,900.00
10% on $0.00 – $12,400.00$1,240.00
12% on $12,400.00 – $50,400.00$4,560.00
22% on $50,400.00 – $105,700.00$1,870.00
Federal Income Tax (before credits)$7,670.00
Federal Income Tax (after credits)$7,670.00
Social Security (6.2%)$4,650.00
Medicare (1.45%)$1,087.50
Total FICA$5,737.50
Total Tax$13,407.50
After-Tax Annual Income$61,592.50
Monthly Take-Home$5,132.71

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

Idaho Income Tax Overview

Idaho levies a single flat income tax of 5.3% on taxable income, a structure the state moved to in recent years after retiring its old multi-bracket system. The Idaho State Tax Commission administers it, and the same rate applies whether you earn a modest salary or a high one. For 2026 the standard deduction for a single filer is $15,750, mirroring the federal figure, which means the first chunk of income is shielded before the 5.3% rate touches anything.

State tax stacks on top of federal tax rather than replacing it. You first determine federal taxable income, and Idaho begins from that federal starting point before applying its own additions, subtractions, and the flat rate. Most Idaho residents owe the tax on wages, self-employment earnings, and investment income; part-year residents and nonresidents pay only on the income tied to Idaho. Because the rate is flat, planning moves that simply shift income between years rarely change your effective Idaho rate the way bracket-management can federally.

Idaho Income Tax Rate

0.053%

Flat rate — same for all income levels

Idaho Tax Snapshot

Sales Tax 0.06%
Avg. Property Tax 0.0063%
Minimum Wage $7.25/hr

Official Sources:

Idaho Income Tax FAQ

Who has to pay Idaho income tax?
Full-year residents owe Idaho tax on all of their income regardless of where it was earned. Part-year residents owe on income received while living in Idaho plus any Idaho-source income, and nonresidents owe only on income connected to the state, such as wages from an Idaho employer or rent from Idaho property. Filing requirements depend on gross income and filing status thresholds set by the State Tax Commission.
Is Idaho's 5.3% really flat for everyone?
Yes. Idaho applies the same 5.3% rate to all taxable income above the standard deduction, so there are no graduated brackets that raise your rate as you earn more. Your effective rate still rises slightly with income because the fixed standard deduction covers a smaller share of a larger paycheck, but the marginal rate stays at 5.3%.
How does the standard deduction work against the flat rate?
Idaho generally conforms to the federal standard deduction, which for a single filer in 2026 is $15,750. You subtract that amount (or your itemized deductions, if larger) before the 5.3% rate is applied, so only income above the deduction is actually taxed. Filers who itemize federally and have significant deductible expenses may come out ahead by itemizing on the Idaho return as well.
Do I pay Idaho tax on retirement or Social Security income?
Social Security benefits are not taxed by Idaho. Other retirement income, such as 401(k) and traditional IRA withdrawals, is generally taxable at the flat 5.3% rate, though Idaho offers a limited deduction for certain government and military pensions for qualifying retirees. Check the current State Tax Commission rules, since eligibility depends on age and the pension source.