# How much is Idaho income tax?

Estimates 2026 Idaho income tax from federal AGI, filing status, and dependents.

- Page: https://www.acalculator.org/finance/idaho-income-tax-calculator
- JSON spec: https://www.acalculator.org/finance/idaho-income-tax-calculator.json
- Version: dc32100e153e

## Default answer

Example with the default inputs (Filing status Single, Federal adjusted gross income $75,000.00, Dependents 0): On $75,000.00 of AGI, filing Single, Idaho income tax is $2,866.72 (3.82% effective).

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| status | Filing status | Your federal filing status. |
| income | Federal adjusted gross income | Your federal AGI (Form 1040 line 11). |
| deps | Dependents | Dependents you claim, not yourself or your spouse. |
| itemized | State itemized deductions | Used if above the standard deduction. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| total | Idaho income tax | State tax after credits, plus any local tax. |
| stateTax | State income tax | State tax after credits. |
| effectiveRate | Effective rate | Tax as a percent of AGI. |
| marginalRate | State marginal rate | State rate on the next dollar. |
| taxableIncome | State taxable income | AGI less deduction and exemptions. |
| deduction | Deduction | Standard or itemized, whichever is larger. |
| exemptions | Exemptions | Personal and dependent exemptions. |
| credits | Credits | State credits used. |
| notice | Note | Rates year note. |

## Method

Taxable income = AGI − larger of standard or itemized deduction − exemptions; tax = state rates on taxable income − credits.

## Assumptions

- An estimate for a full-year resident, 2025 rates, not tax advice.
- Starts from federal AGI; Idaho additions and subtractions are not modelled.
- Not modelled for Idaho: Uses the 2025 rate schedule; Idaho indexes the zero bracket each year. Idaho uses the federal standard deduction.
- Not modelled: part-year and nonresident returns, other state credits, and state AMT.

## Worked examples

1. status = single, income = $50,000.00, deps = 0 gives taxableIncome = $33,900.00, stateTax = $1,541.72, total = $1,541.72. Source: Idaho State Tax Commission, Individual Income Tax Rate Schedule (2025), https://tax.idaho.gov/taxes/income-tax/individual-income/individual-income-tax-rate-schedule/ (worked from it at AGI $50,000, single).
2. status = mfj, income = $100,000.00, deps = 2 gives taxableIncome = $67,800.00, stateTax = $3,083.43, total = $3,083.43.
3. status = hoh, income = $200,000.00, deps = 1 gives taxableIncome = $175,850.00, stateTax = $8,810.08, total = $8,810.08.

## FAQ

### What is the Idaho income tax rate?

Idaho taxes income at a flat 5.3%. For a single filer the schedule is 0% from $0, 5.3% above $4,811 of taxable income. These are the 2025 (the latest Idaho has published) rates.

### How is Idaho income tax calculated?

Start from federal adjusted gross income. Subtract the larger of the Idaho standard deduction and your itemized deductions, then the exemptions. Apply the rates to what is left and subtract any credits. Idaho uses the federal standard deduction ($16,100 single, $32,200 joint, $24,150 head of household for 2026). The model has no exemptions or credits for this state.

### Does Idaho have a local income tax?

This page has no local income tax for Idaho; if your city or county has one, add it yourself.

### What does this Idaho calculator leave out?

Uses the 2025 rate schedule; Idaho indexes the zero bracket each year. Idaho uses the federal standard deduction. It also leaves out state additions and subtractions to federal AGI (such as retirement or Social Security exclusions), part-year and nonresident returns, and credits such as child care, earned income, and tax paid to another state.

### Which tax year do the Idaho rates cover?

The page uses 2025 amounts, because Idaho had not published 2026 amounts when this page was built. They come from Idaho State Tax Commission.

### Which states have no income tax on wages?

Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. They have no page of their own, because there is no wage income tax to work out; the state income tax calculator answers 0 for them. Federal income tax and Social Security and Medicare still apply.

### Is this the same as my paycheck withholding?

No. This is the tax for the whole year on your return. Your employer withholds by the state's own withholding formula, so your refund or balance due is the difference between the two.

## Sources

- Idaho State Tax Commission, Individual Income Tax Rate Schedule (2025), https://tax.idaho.gov/taxes/income-tax/individual-income/individual-income-tax-rate-schedule/