Your hub for Idaho taxes: state income tax (Flat 5.8%), plus free calculators for take-home pay, self-employment tax, quarterly estimates, and salary conversion.
Last updated: May 2026 · Data: IRS, BLS, Idaho State Tax Commission
Idaho levies a state income tax (Flat 5.8%) that is withheld from wages on top of federal tax and FICA. Idaho moved to a flat income tax rate of 5.8% in 2023, simplifying its previous graduated bracket system. The state has no estate or inheritance tax.
| Tax | 2026 Rate / Detail |
|---|---|
| Idaho State Income Tax | Flat 5.8% |
| Idaho State Sales Tax (base) | 6% |
| Federal Income Tax | 10% to 37% (progressive brackets) |
| Social Security | 6.2% on first $176,100 |
| Medicare | 1.45% on all wages (plus 0.9% above $200,000) |
| Federal Standard Deduction (Single / MFJ) | $15,000 / $30,000 |
| Minimum Wage | $7.25 / hour |
| State Tax Authority | Idaho State Tax Commission |
Idaho has a state income tax. The 2026 rate is Flat 5.8%. This applies on top of federal income tax and FICA (Social Security and Medicare) withheld from your pay.
For 2026, Idaho income tax is Flat 5.8%. Idaho moved to a flat income tax rate of 5.8% in 2023, simplifying its previous graduated bracket system. The state has no estate or inheritance tax.
A Idaho paycheck has federal income tax, Idaho state income tax (Flat 5.8%), Social Security (6.2% up to $176,100), and Medicare (1.45%) withheld. Try the take-home pay calculator for a personalized net-pay estimate.
Yes. Self-employed workers in Idaho generally make quarterly estimated payments to the IRS and to the state if they expect to owe tax. The quarterly estimated tax calculator estimates each payment and the due dates.
The Idaho statewide base sales tax rate is 6%. Local jurisdictions may add their own rates on top of the state rate.