Idaho Income Tax Guide

5.3% above a zero-rate bandThe latest posted individual schedule leaves an initial amount untaxed before applying 5.3%.

Federal-style deductionThe calculator uses supported 2026 federal standard-deduction amounts as an Idaho planning assumption.

2026 threshold is provisionalIdaho had not posted a separate 2026 individual schedule when this guide was updated.

Updated August 24, 2026

Official SourcesIdaho rate schedule Idaho basics Idaho conformity IRS

Idaho rate schedule Idaho basics Idaho conformity IRS

Calculate for Idaho

Federal taxable income is approximatedThe estimate starts from supported income and subtracts the matching 2026 federal standard-deduction amount.

The latest official schedule is usedThe calculator leaves the first $4,811 untaxed for non-joint filers and $9,622 on a joint return, then applies 5.3%.

The threshold is a planning assumptionThe rate page currently labels those zero-rate thresholds for 2025; revisit the result when Idaho publishes its 2026 schedule.

The food tax credit is outsideHousehold-member eligibility and residency details are needed to calculate Idaho's food tax credit.

Residency affects the income basePart-year and nonresident Idaho-source income allocation is not modeled.

Is Idaho simply a 5.3% flat tax?Not quite. The latest official schedule has a zero-rate band before the 5.3% rate begins.

Are the 2026 thresholds final?No separate 2026 schedule was posted at the update date, so the calculator transparently uses the latest official thresholds.

Are itemized deductions compared?No. The estimate uses a supported standard-deduction assumption.

Is the food tax credit included?No. It requires household and residency details beyond the current inputs.

Is a local Idaho wage tax added?No broad local individual wage tax is added automatically.

Is this Idaho Form 40?No. It is a planning model and does not calculate every Idaho addition, subtraction, and credit.

Idaho Income Tax Guide

How Idaho taxes work

Common Idaho tax questions