Idaho Tax Brackets 2026
Idaho state income tax rates for tax year 2026 — a flat 5.8% on all taxable income.
Tax year
2026
Type
Flat
Rate range
Flat 5.8%
Brackets
1
Idaho state tax at common incomes (2026)
| Taxable income | Single — tax | Single — effective | MFJ — tax | MFJ — effective |
|---|---|---|---|---|
| $50,000 | $2,900 | 5.80% | $2,900 | 5.80% |
| $75,000 | $4,350 | 5.80% | $4,350 | 5.80% |
| $100,000 | $5,800 | 5.80% | $5,800 | 5.80% |
| $150,000 | $8,700 | 5.80% | $8,700 | 5.80% |
| $250,000 | $14,500 | 5.80% | $14,500 | 5.80% |
| $500,000 | $29,000 | 5.80% | $29,000 | 5.80% |
State income tax only. Excludes federal tax, FICA, and local/city taxes. Assumes taxable income (after deductions).
About Idaho's 2026 rates
Idaho's flat tax rate means all taxable income is taxed at the same 5.8% rate regardless of income level. Idaho conforms closely to the federal tax code for determining taxable income, with some modifications. The state does not tax Social Security benefits.
View 2025 Idaho tax brackets for comparison.
Frequently asked questions
What are the Idaho tax brackets for 2026?
Idaho has a flat state income tax of 5.8% for tax year 2026 — applied to all taxable income regardless of filing status.
What is the top Idaho income tax rate in 2026?
5.8%.
How much Idaho state tax on $100,000 in 2026?
A single filer with $100,000 of taxable income owes $5,800 in Idaho state income tax for 2026 — an effective rate of 5.80%. Married filing jointly with the same income owes $5,800 (5.80% effective). Federal tax is separate.
Are Idaho 2026 tax brackets the same as 2025?
Bracket thresholds may have changed for 2026 via inflation indexing or legislative action. The figures on this page are the Idaho bracket thresholds in effect for tax year 2026.
Explore more Idaho tax info
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