Idaho Income Tax Calculator
Calculate your 2026 Idaho state income tax. See your bracket breakdown, effective rate, and how Idaho compares to neighboring states.
Your Tax Inputs
Effective Rate vs Neighboring States
Idaho Tax Brackets (2026)
Federal vs Idaho Tax Comparison
Estimate for your income and filing status. Federal uses 2026 brackets and standard deduction.
| Item | Federal | Idaho | Total |
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About Idaho state taxes (Tax year 2026)
Idaho has a flat income tax rate of 5.695% on all taxable income, effective 2023. This replaced a progressive system. Idaho conforms to the federal standard deduction.
Groceries are taxed at the full state rate. Prescription drugs are exempt.
Idaho's 5.695% flat rate is above the national average. Its taxation of groceries at the full rate is notable, though a grocery tax credit helps offset the impact.
Filing in Idaho: returns for tax year 2026 are administered by the Idaho State Tax Commission and are generally filed in 2027 by the federal April deadline unless Idaho declares a state-specific extension. Tax type on this return: Flat. Top marginal rate: 5.695%. State sales-tax rate: 6.0%. For the most current contact info, see the Federation of Tax Administrators directory.
Idaho — What is Idaho's income tax rate? Idaho has a flat income tax rate of 5.695% on all taxable income. This flat rate replaced a progressive system in 2023.
Idaho — Does Idaho tax groceries? Yes, Idaho taxes groceries at the full 6% state sales tax rate. However, the state provides an annual grocery tax credit of $120 per person to offset this.
Idaho — How does Idaho compare to neighboring states? Idaho's 5.695% rate is higher than Montana's top rate for most taxpayers but lower than Oregon's. Compared to Washington and Wyoming (no income tax), Idaho's tax burden is higher.
How this page is reviewed
| Risk tier | High YMYL |
|---|---|
| Author | Calculover Editorial Team Tax education |
| Editorial owner | Calculover Tax & Payroll Desk State-tax methodology owner |
| Reviewer | Calculover Editorial Review Government-source and limitation review |
| Last reviewed | 2026-05-14 |
| Last verified | 2026-05-14 |
| Data effective date | 2026-01-01 |
| Jurisdiction | Idaho |
Methodology
State-tax per-state pages apply the published 2026 bracket schedule, standard deduction, and filing-status rules for the listed jurisdiction. Federal AGI inputs are mapped to state taxable income before bracket math runs. Local taxes (NYC, Philadelphia, certain Ohio cities) are flagged but not embedded in the base estimate.
Assumptions
- The user enters federal AGI, filing status, and state-specific adjustments as provided.
- Brackets, standard deductions, and credits reflect the 2026 statutory values published by the state Department of Revenue and the Tax Foundation.
- Local income taxes and reciprocity-agreement situations are noted but not auto-applied.
Limitations
- These pages do not predict mid-year legislative changes, rate adjustments, or new local tax assessments.
- Multi-state filers, convenience-of-employer rules, and special-circumstance credits require additional tax-professional analysis.
Sources
- State Tax Rates, Federation of Tax Administrators
- State Individual Income Tax Rates and Brackets, Tax Foundation
- State Government Resources, Internal Revenue Service
Professional guidance: This page is for state-tax education only and is not tax, legal, financial, or investment advice. State tax decisions and multi-state filing should be reviewed with a CPA or enrolled agent licensed in the relevant states.