Idaho Paycheck Calculator
Idaho has a flat 5.695% state income tax — calculate your take-home pay with this simple, predictable rate.
Idaho Flat Tax: 5.695%
Idaho uses a flat income tax rate of 5.695% on all taxable income — the same rate regardless of how much you earn.
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Idaho Tax Summary
| Federal Income Tax | 10% – 37% |
| Social Security | 6.2% |
| Medicare | 1.45% |
| Idaho State Income Tax | 5.695% flat (2026) |