Idaho Paycheck Calculator 2026

Idaho uses a flat state income tax rate of 5.7%.

Employees in Idaho still pay the same federal payroll taxes as workers in every other state: Social Security tax of 6.2% on wages up to $184,500, plus Medicare tax of 1.45% on all wages. Additional Medicare tax of 0.9% applies above $200,000 for single filers, $250,000 for married filing jointly, $125,000 for married filing separately, and $200,000 for head of household filers.

Step 2(b) increases federal withholding when there are multiple jobs, which usually reduces take-home pay now but helps avoid an underpayment later. Step 3 reduces federal withholding through dependent amounts, and this calculator uses $2,200 for each qualifying child under 17 and $500 for each other dependent. Step 4(a) adds other annual income into withholding calculations, Step 4(b) reduces taxable income using annual deduction worksheet amounts, and Step 4(c) adds an extra flat amount of withholding to each paycheck.

Traditional 401(k) contributions reduce federal taxable income, but they are still generally subject to Social Security and Medicare tax. Section 125 health insurance premiums, HSA contributions, and FSA contributions usually reduce both income-tax wages and FICA wages. Roth 401(k) contributions do not reduce current taxable income, so they lower take-home pay without lowering current federal withholding.

This calculator covers federal withholding, FICA, and state income tax rules used by the calculator engine, but it does not add city, county, or school district payroll taxes. If you work in a location with local wage taxes, your actual take-home pay may be lower than this estimate.

Idaho's minimum wage is $7.25/hr, which is about $15,080 per year before taxes for full-time work. The average salary is $54,200, the median salary is $48,500, and the cost-of-living index is 97.7.