Idaho charges 5.3% flat state income tax. Use the rsu tax calculator pre-loaded with Idaho rates.
Open RSU Tax Calculator →RSU vesting in Idaho triggers a flat 5.3% state income tax, treated as ordinary income just like your salary. Your employer typically sells shares at vesting to cover the combined federal, state, and FICA withholding, which can consume 35-50% of the vested shares depending on your income level. This calculator shows you exactly how many shares (or dollars) you keep after all Idaho tax layers are applied.
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 rsu 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.