Idaho Income Tax Calculator
Calculate your Idaho state income tax alongside federal tax. See the full bracket breakdown, effective rate, and combined tax liability.
Last updated: · Tax Foundation (2025 state brackets) + IRS Rev. Proc. 2025-32 (2026 federal)
On a $75,000 salary in Idaho (single filer, 2025), your estimated state income tax is $3,503.20 (4.7% effective rate). Combined with federal tax of $7,670.00, your total income tax is $11,173.20 (14.9% combined effective rate). Idaho uses a flat tax rate of 5.80%. Source: Tax Foundation, state revenue department.
Idaho Deduction: $14,600.00
Standard deduction: $14,600.00
Flat rate of 5.8% as of 2023. Previously had progressive brackets.
Federal estimates use 2026 IRS brackets. State estimates use 2025 state rate data.
Results
Idaho Tax Bracket Breakdown
| Rate | Range | Tax |
|---|---|---|
| 5.80% | $0 – ∞ | $3,503.20 |
| Total Idaho Tax | $3,503.20 | |
Compare Idaho with Other States
How This Is Calculated
Idaho levies a flat income tax rate of 5.80% on all taxable income.
After applying the state deduction of $14,600.00, the tax is: (Income − Deduction) × 5.80%
Data source
State bracket data from the Tax Foundation (2025 State Individual Income Tax Rates and Brackets). Cross-referenced with the Idaho revenue department. Federal brackets from IRS Rev. Proc. 2025-32 (2026).
Frequently Asked Questions
- How much is Idaho income tax on $75,000?
- On a $75,000 salary in Idaho, you would owe approximately $3,503.20 in state income tax (4.7% effective rate) plus $7,670.00 in federal income tax, for a combined total of $11,173.20 (14.9% combined effective rate).
- What is the Idaho income tax rate for 2025?
- Idaho has a flat income tax rate of 5.80%. All taxable income is taxed at the same rate. Flat rate of 5.8% as of 2023. Previously had progressive brackets.