Idaho Tax Brackets 2026
Idaho state income tax rates for tax year 2026 — a flat 5.3% on all taxable income.
Tax year
2026
Type
Flat
Rate range
Flat 5.3%
Brackets
1
Idaho state tax at common incomes (2026)
| Taxable income | Single — tax | Single — effective | MFJ — tax | MFJ — effective |
|---|---|---|---|---|
| $50,000 | $2,395 | 4.79% | $2,140 | 4.28% |
| $75,000 | $3,720 | 4.96% | $3,465 | 4.62% |
| $100,000 | $5,045 | 5.05% | $4,790 | 4.79% |
| $150,000 | $7,695 | 5.13% | $7,440 | 4.96% |
| $250,000 | $12,995 | 5.20% | $12,740 | 5.10% |
| $500,000 | $26,245 | 5.25% | $25,990 | 5.20% |
State income tax only. Excludes federal tax, FICA, and local/city taxes. Assumes taxable income (after deductions).
How Idaho tax is calculated on $75,000 (2026, single filer)
$75,000 × 5.3% = $3,720.
Assumes $75,000 of state taxable income (after deductions and exemptions). State income tax only — federal tax, FICA, and any local/city tax are separate.
About Idaho's 2026 rates
Because Idaho Code 63-3024 imposes the 5.3% rate on taxable income over the floor rather than on every dollar, the floor is worth up to $255 of tax to a single filer and $510 on a joint return, and everything above it is taxed at the same rate no matter how much you earn. Idaho conforms closely to the federal tax code for determining taxable income, with some modifications. The state does not tax Social Security benefits.
State tax sits on top of federal — see the current federal tax brackets and standard deductions to estimate your full 2026 liability.
Compare every state at the state tax brackets hub, or calculate your Idaho income tax.
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 5.3% for tax year 2026 — applied to all taxable income regardless of filing status.
What is the top Idaho income tax rate in 2026?
5.3%.
How much Idaho state tax on $100,000 in 2026?
A single filer with $100,000 of taxable income owes $5,045 in Idaho state income tax for 2026 — an effective rate of 5.05%. Married filing jointly with the same income owes $4,790 (4.79% effective). Federal tax is separate.
Are Idaho 2026 tax brackets the same as 2025?
Idaho indexes its bracket thresholds to inflation each year, and the state has not yet published the 2026 schedule. The figures on this page are the most recently published thresholds (2025), which is what the state directs filers to use until the 2026 schedule is released.
Explore more Idaho tax info
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