Idaho Paycheck Calculator

Idaho Paycheck Calculator: Calculate Your 2026 Take-Home Pay

Our Idaho Paycheck Calculator helps you estimate your net (take-home) pay after federal taxes, FICA (Social Security and Medicare), Idaho state income tax, and pre-tax deductions. Idaho applies a flat 5.3% income tax rate after a generous zero-tax threshold, using the same standard deduction as the federal government. This tool provides a detailed breakdown of your earnings and deductions for the 2026 tax year. Use our Take Home Paycheck Calculator for a general estimate and the Income Tax Calculator for federal tax planning.

How Idaho State Income Tax Works

Idaho uses a flat 5.3% income tax rate on taxable income above a threshold. For 2025, the rate was reduced from 5.695% to 5.3% by House Bill 40. The first $4,811 of taxable income is taxed at 0% for single filers, and the first $9,622 for married filing jointly, making the effective rate lower than the headline rate for most taxpayers. Idaho uses the same standard deduction amounts as the federal government: $16,100 for single filers, $32,200 for joint filers, and $24,150 for head of household in 2026.

Key features of Idaho state income tax:

• Flat 5.3% rate on taxable income above the threshold
• Zero-tax threshold: $4,811 single / $9,622 married (adjusted for inflation)
• Uses federal standard deduction amounts as starting point
• No additional state-level standard deduction or personal exemption
• No local income taxes

Federal Tax and FICA Deductions

This calculator applies the 2026 federal income tax brackets based on your filing status. The standard deduction for 2026 is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for head of household. FICA taxes include Social Security at 6.2% (up to the annual wage base of $184,500), Medicare at 1.45%, and Additional Medicare at 0.9% for high earners above $200,000 ($250,000 for joint filers).

How This Is Calculated

This calculator is based on 2026 IRS federal tax brackets and FICA, plus each state's latest published income-tax schedule. Idaho's tax is calculated on your federal taxable income (after the federal standard deduction). If your taxable income is below the Idaho threshold, no state tax is owed. For income above the threshold, the excess is taxed at 5.3%. Pre-tax deductions (401(k), HSA, health premiums) reduce your taxable income before all taxes are applied.

Sources:

• IRS: Federal income tax rates and brackets
• IRS Topic No. 751: Social Security and Medicare withholding rates
• SSA: Social Security wage base (contribution and benefit base)
• Idaho State Tax Commission - Income Tax Rate Schedule