Estimate your combined federal and Idaho state income tax liability in under 60 seconds. Updated with the latest 2026 brackets and FICA rates.
Idaho has a flat income tax rate of 5.8% for the 2026 tax year. Idaho moved to a flat income tax rate of 5.8% in 2023, simplifying its previous graduated bracket system. The state has no estate or inheritance tax.
Understanding how your state tax brackets work is essential for effective tax planning. Since Idaho uses a flat rate, calculating your state tax is straightforward — simply multiply your taxable income by 5.8%.
| Tax Rate | Income Range | Tax Owed |
|---|---|---|
| 5.8% | Above $0 | $0 + 5.8% of amount over $0 |
Source: Idaho State Tax Commission. Brackets shown for single filers, tax year 2025 (filed in 2026).
Sales Tax: Idaho has a state sales tax rate of 6.0%. Local jurisdictions may add additional sales tax.
Federal income tax applies to all U.S. taxpayers regardless of state. Below are the 2026 federal brackets for single filers.
| Rate | Single Filer Income Range |
|---|---|
| 10% | $0 – $11,925 |
| 12% | $11,925 – $48,475 |
| 22% | $48,475 – $103,350 |
| 24% | $103,350 – $197,300 |
| 32% | $197,300 – $250,525 |
| 35% | $250,525 – $626,350 |
| 37% | Above $626,350 |
The standard deduction for single filers in 2026 is $15,000. Married filing jointly: $30,000.
Source: IRS Revenue Procedure for tax year 2025.
FICA taxes fund Social Security and Medicare and are calculated on gross wages before deductions.
| Tax | Rate | Wage Base |
|---|---|---|
| Social Security | 6.2% | First $168,600 |
| Medicare | 1.45% | All wages |
| Additional Medicare | 0.9% | Wages above $200,000 |
The minimum wage in Idaho for 2026 is $7.25/hour, which is the federal minimum rate. Federal rate applies At full-time hours (40 hours/week, 52 weeks), this equals approximately $15,080/year before taxes.
The median household income in Idaho is approximately $69,000, based on U.S. Census Bureau American Community Survey estimates. Use the calculator above to see how your income compares after federal and state taxes.
Starting a business in Idaho requires filing Articles of Organization with the state. Here are the key costs:
| Item | Cost | Frequency |
|---|---|---|
| Articles of Organization Filing | $100 | One-time |
| Annual report (no fee) | N/A | N/A |
| Registered Agent | $0 – $150/yr | Yearly |
Source: Idaho Secretary of State.
Northwest Registered Agent handles all the paperwork for $39 + state fee. Includes free registered agent service for the first year, privacy protection, and compliance alerts.
Start My Idaho LLCIdaho has a flat income tax rate of 5.8% for the 2026 tax year (single filers).
Idaho has a state sales tax rate of 6.0%. Local jurisdictions may add additional sales tax.
The minimum wage in Idaho for 2026 is $7.25 per hour. Federal rate applies
Filing an LLC in Idaho costs $100 for the Articles of Organization. Annual report (no fee).
The median household income in Idaho is approximately $69,000, based on U.S. Census Bureau estimates.