Idaho income tax rates for 2026
A flat 5.3% on taxable income above a 0% band ($4,811 single, $9,622 joint in 2025). The calculation starts from federal adjusted gross income less the federal standard deduction.
| Rate | Taxable income |
|---|---|
| 0% | $0 – $4,811 |
| 5.3% | Over $4,811 |
| Rate | Taxable income |
|---|---|
| 0% | $0 – $9,622 |
| 5.3% | Over $9,622 |
Heads of household use the joint brackets. Married people filing separately use the single brackets.
Deductions, exemptions and credits
Before the rates apply, Idaho allows the federal standard deduction of $16,100 (single) or $32,200 (married filing jointly). The calculator uses these for the filing status you choose; dependent exemptions and credits, which lower the tax further for families, are not included.
Worked example: $75,000 in Idaho
Single filer with $75,000 of income before state deductions.
Taxable income = $75,000 − $16,100 (federal standard deduction) = $58,900.00
Brackets: 0% × $4,811.00 + 5.3% × $54,089.00 = $2,866.72
Idaho income tax = $2,866.72 — an effective rate of 3.82% and a marginal rate of 5.3%.
Idaho income tax at common incomes
| Income | Single | Effective | Married jointly | Effective |
|---|---|---|---|---|
| $30,000 | $482 | 1.61% | $0 | 0% |
| $50,000 | $1,542 | 3.08% | $433 | 0.87% |
| $75,000 | $2,867 | 3.82% | $1,758 | 2.34% |
| $100,000 | $4,192 | 4.19% | $3,083 | 3.08% |
| $150,000 | $6,842 | 4.56% | $5,733 | 3.82% |
| $250,000 | $12,142 | 4.86% | $11,033 | 4.41% |
Income before state deductions; standard deduction and personal exemptions for the filer (and spouse) only; no dependents, itemized deductions or local taxes.
Idaho compared with nearby states
At $75,000 (single), Idaho ranks 20 of 51 for state income tax, where 1 is the highest. Washington, Nevada and Wyoming do not tax wages.
| State | Tax on $75,000 | Effective rate | Top rate |
|---|---|---|---|
| Idaho | $2,867 | 3.82% | 5.3% |
| Washington | $0 | 0% | none |
| Oregon | $5,059 | 6.74% | 9.9% |
| Nevada | $0 | 0% | none |
| Utah | $3,110 | 4.15% | 4.45% |
| Wyoming | $0 | 0% | none |
| Montana | $2,877 | 3.84% | 5.65% |
Idaho’s 2026 rate is 5.3%; the inflation-adjusted 2026 width of its 0% band had not been published when we checked, so the 2025 amount ($4,811 single) is used.
Frequently asked questions
What is the Idaho income tax rate for 2026?
A flat 5.3% on taxable income above a 0% band ($4,811 single, $9,622 joint in 2025). A single filer with $75,000 of income pays an effective 3.82% after deductions.
How much Idaho income tax do I pay on $75,000?
About $2,867 for a single filer — 3.82% of income — after $16,100 of federal standard deduction. A married couple with $150,000 owes about $5,733.
What deductions does Idaho allow?
Idaho allows the federal standard deduction of $16,100 (single) or $32,200 (married filing jointly). Dependent exemptions or credits, where the state offers them, lower the tax further.
Is Idaho's income tax higher than its neighbors'?
At $75,000 (single), Idaho ranks 20 of 51 for state income tax, where 1 is the highest. Among nearby states, Washington is lowest at $0 and Oregon is highest at $5,059.
Estimates only — not tax advice. Idaho figures: Tax Foundation, State Individual Income Tax Rates and Brackets, 2026 (as of Jan. 1, 2026); Idaho State Tax Commission 2026 withholding tables (rate). Checked October 2026. Your return may include income, deductions and credits this estimate leaves out.