Idaho Paycheck Calculator

Paycheck taxes in Idaho

Idaho cut its income tax rate from 5.695% to 5.3% for tax year 2025 via House Bill 40, made retroactive to January 1, 2025 — the largest income tax cut in state history. The tax is effectively flat: 5.3% applies to taxable income above a small zero-rate band ($4,673 single / $9,346 married filing jointly), after a standard deduction that mirrors the federal amounts.

Bonuses and supplemental wages in Idaho

Bonuses and other supplemental wages are frequently withheld differently from regular pay, and states set their own rules. This calculator applies Idaho's regular withholding to every dollar and does not model a separate supplemental rate, so a bonus paycheck can come out higher or lower than the figure above. Federal supplemental withholding is a flat 22% up to $1 million; for Idaho's own treatment, check the state authority linked below.

For the federal half, which this site does model, compare what withholding takes from a bonus against what you actually owe — the 22% flat rate is withholding, not a tax bill, and the difference comes back at filing.

Idaho vs. its neighbors

On a $100,000 salary you keep $74,962 in Idaho — $4,218 less than in neighboring Washington, $3,959 more than in Oregon, and $232 more than in Utah.

Federal income tax and FICA are identical in every state, so the whole gap above is state income tax. Single filer, $100,000 of wages, no 401(k) or other pre-tax deductions, 2025 state tables. Local income taxes (city and county) are not included. Run your own salary through the calculator above, or on any state's page.

Neighbours are only part of the picture. The study behind these figures ranks what a $100,000 salary takes home in all 50 states, with Idaho's row in place — the entire spread between best and worst is state income tax, since federal tax and FICA are identical everywhere.

A worked example at Idaho's median income

Idaho's median household income is $81,650 (2024, U.S. Census Bureau via FRED (real median household income)). Run through the same engine as the calculator above (single filer, taxes only):

That is an effective all-in tax rate of 22.8% at the median — your own number depends on filing status, 401(k), and benefits. Enter your salary above for the exact figure.

Common questions