| Topic | Washington | Idaho |
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| Income tax on wages | None | 5.3% flat on all your income once you live here; Social Security is not taxed |
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| Sales tax (average combined) | 9.57% | 6.03%; groceries are taxed, with a $155 food tax credit per person |
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| Minimum wage, 2026 | $17.13 statewide; some cities set higher rates | $7.25, the federal rate |
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| Car taxes | Seattle-area drivers pay Sound Transit's 1.1% tax on depreciated value | $21 title plus $45 to $69 a year in state registration by age, plus county fees; no value-based fee |
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Tax rates are top state rates as of Jan. 1, 2026 and average combined sales tax rates for midyear 2026 (Tax Foundation); local income taxes are not included. Minimum wages are state rates (U.S. Department of Labor, updated July 1, 2026). Source: Tax Foundation: State income tax rates, 2026, Tax Foundation: State and local sales tax rates, midyear 2026, U.S. Department of Labor: State minimum wage laws