How Idaho taxes your income
Idaho has a flat 5.3% state income tax for 2026. The Idaho salary calculator above works out federal income tax, Social Security, Medicare and the Idaho items listed here, then shows what is left each year, month, week and hour.
- Standard deduction: $16,100 (single) or $32,200 (married filing jointly).
- Pre-tax 401(k) contributions reduce your Idaho taxable wages.
Idaho tax brackets for 2026
| Taxable income over | Rate |
|---|---|
| $0 | 0% |
| $4,811 | 5.3% |
| Taxable income over | Rate |
|---|---|
| $0 | 0% |
| $9,622 | 5.3% |
Notes about Idaho rules
Idaho starts from federal taxable income, so the federal standard deduction applies. Bracket widths use 2025 inflation-adjusted amounts because 2026 amounts were not yet available when this data was sourced.
What this calculator includes
It uses 2026 federal income tax brackets for single filers and married couples filing jointly, Social Security and Medicare tax, and the Idaho rules above. It does not include dependents, tax credits other than those listed, itemized deductions, self-employment tax, or head of household filing.
Rates, brackets and deductions as published for tax year 2026 (state data sourced February 2026).
Frequently asked questions
What is the state income tax rate in Idaho?
Idaho uses a flat rate of 5.3% on taxable income for 2026. Taxable income is your wages after the deductions and exemptions listed on this page.
What deductions does Idaho allow in this calculator?
Idaho has a standard deduction of $16,100 (single) or $32,200 (married filing jointly). These are the only Idaho deductions and credits the calculator uses. Itemized deductions and dependents are not included.
Do 401(k) contributions lower my Idaho income tax?
Yes. Pre-tax 401(k) contributions are taken out of your Idaho taxable wages as well as your federal taxable wages. They do not reduce Social Security or Medicare tax.
Which federal taxes apply to my pay in Idaho?
Federal income tax uses 2026 brackets from 10% to 37% after the $16,100 standard deduction for single filers. Social Security is 6.2% on wages up to $184,500 and Medicare is 1.45% on all wages, with 0.9% extra above $200,000 ($250,000 for joint filers).
Does this calculator include local taxes?
No. City, county and school-district income or payroll taxes are not included. If your area charges one, your real take-home pay will be a little lower.
How is the hourly figure calculated?
Your yearly take-home pay is divided by the hours you enter per week multiplied by 52 weeks.
How current is the Idaho data?
Rates, brackets and deductions as published for tax year 2026 (state data sourced February 2026). Tax laws change, so confirm important numbers with the official sources listed below.
Official and data sources
- Idaho – state tax agency
- IRS – Federal income tax rates and brackets
- Social Security Administration – Contribution and benefit base
- Tax Foundation – State Individual Income Tax Rates and Brackets, 2026
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Also for Idaho: Idaho Income Tax Calculator · Idaho Paycheck Calculator
Disclaimer: results are estimates for information only. They are not tax, legal or financial advice.