Idaho charges 5.3% flat state income tax. Use the overtime tax calculator pre-loaded with Idaho rates.
Open Overtime Tax Calculator →When you work overtime in Idaho, each extra hour is subject to federal supplemental withholding (typically 22%), FICA (7.65%), and Idaho's flat 5.3% state tax. Without local income taxes, the state rate is the only additional layer. The overtime calculator shows you the real after-tax value of overtime work with Idaho rates, so you can decide whether extra hours are worth it.
Idaho levies a flat 5.3% state income tax on all taxable income regardless of how much you earn. This makes tax planning straightforward: for every additional dollar you earn, 5.3 cents goes to Idaho. Idaho does not impose local income taxes, so the 5.3% flat rate is the only state-level income tax you owe.
The table below shows what you actually keep at five salary levels in Idaho, accounting for federal tax, FICA, and Idaho's flat 5.3% state tax.
See how Idaho compares to other West states. Each link takes you to the overtime tax calculator landing page for that state.
For a comprehensive breakdown of Idaho’s tax structure, salary comparisons, cost-of-living analysis, and more, visit the full Idaho take-home pay page.