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Idaho Tax Refund Calculator
Use this free calculator to estimate your Idaho state tax refund for the 2025-2026 tax year. Idaho uses a flat income tax system with rates from 5.8%. Enter your income, filing status, and deductions below to see your estimated refund or balance due.
This calculator uses official Idaho Department of Revenue tax tables and standard deduction amounts for the 2026 tax year. Results are estimates and should be verified with a tax professional.
Idaho State Tax Calculator 2025-2026
Idaho Tax System Details
Idaho operates a flat-rate income tax system with 1 tax bracket. Tax rates range from 5.8%, applying to all taxable income earned by Idaho residents. The state standard deduction for 2026 is $13,850 for single filers and $27,700 for married filing jointly.
How Idaho Compares to Other States
Idaho's 5.8% flat rate is higher than neighboring Montana's progressive rate up to 5.9%, and significantly higher than Wyoming's 0% income tax. Washington has no income tax but high sales tax, and Oregon has no sales tax but progressive income tax up to 9.9%. Idaho's flat rate means high earners don't face escalating brackets.
A single filer earning $65,000 after the standard deduction would pay about $3,770 in state tax. For a gross income of $80,000, the effective rate is approximately 4.6%.
Deductions and Credits Available in Idaho
Idaho offers a grocery tax credit (up to $120 per household member), a child care expense deduction, and a retirement income deduction of up to $35,842 of Social Security and other retirement benefits for those 65+. Contributions to Idaho's 529 plan (IDeal) are also deductible.
For federal tax purposes, Idaho residents can deduct their state income tax payments on their federal return if they itemize deductions, subject to the $40,000 SALT cap.
Sales Tax in Idaho
Idaho's state sales tax rate is 6% on most goods, and groceries are taxed at the full rate. Local jurisdictions add up to 3% in additional sales tax. Property taxes average about 0.69% of home value.
Idaho Income Tax Overview
This state uses a flat income tax system — all taxable income is taxed at the same rate regardless of your income level, making the calculation straightforward. The standard deduction is $13,850 single / $27,700 married, which directly reduces the amount of income subject to tax. Practical tip: the effective rate you actually pay is usually far lower than the top marginal rate. For typical middle-income earners, the effective state tax rate lands well below the headline rate.
The standard deduction directly reduces your taxable income before the flat rate is applied. The state sales tax rate is 6% (avg combined 6.4%), which applies to most goods and some services depending on local laws. Property taxes in Idaho average approximately 0.72% of home value. For context, the national average property tax rate is roughly 1.1%. Residents should check their city and county rates, as local add-ons can significantly increase the combined sales tax rate above the state base rate.
Compared to neighboring states — Washington (none), Oregon (9.9%), Montana (6.75%), Wyoming (none) — Idaho offers a distinct balance of rates, deductions, and available credits that can significantly impact your total tax burden. For retirement income: SS exempt, retirement income partially taxable. Idaho standard deduction matches the federal amount. Idaho offers various credits including potential property tax relief, earned income tax credits, and retirement income deductions depending on eligibility. The annual filing deadline for state income tax returns is April 15, matching the federal deadline. Taxpayers who cannot file by the deadline can request an automatic six-month extension, though any tax owed must still be paid by April 15 to avoid interest and penalty charges. Self-employed individuals, recent movers, and retirees with complex income sources should consult a qualified tax professional for personalized guidance.
Frequently Asked Questions About Idaho Taxes
What is the Idaho state income tax rate structure?
Idaho uses Flat 5.8% system. This rate structure determines how much state tax you owe based on your taxable income after subtracting the standard deduction of $13,850 single / $27,700 married. Understanding where your income falls within this structure is the first step in estimating your state tax liability. Taxpayers should verify current year rates with the state department of revenue, as legislative changes can affect brackets and rates from year to year.
Does Idaho tax Social Security and retirement income?
SS exempt, retirement income partially taxable. Social Security benefits are generally treated favorably across most states, and Idaho follows this approach. However, federal taxation of Social Security may still apply based on your combined income level. Retirees should also consider how Idaho handles pension income, 401(k) withdrawals, and IRA distributions when planning their retirement budget, as state-level treatment varies significantly across the country.
What are the sales and property tax rates in
The Idaho state sales tax rate is 6% (avg combined 6.4%). Combined state and local rates can vary by city and county. Property taxes average approximately 0.72% of home value. Idaho standard deduction matches the federal amount. Taxpayers should consider these consumption-based and property-based taxes when evaluating their overall tax burden, as they can significantly affect the true cost of living in Idaho compared to other states with different tax structures.