Idaho’s recent tax cuts dropped the state’s flat income tax rate to 5.3% for both individuals and corporations starting with the 2025 tax year, raised the grocery tax credit to $155 per person, and sent new state money to school districts with instructions to reduce local property tax bills by the same amount. Together these changes have returned over half a billion dollars to residents and businesses across three legislative sessions.
The 5.3% Flat Income Tax Rate
Idaho taxes individual income at a single flat rate of 5.3% for 2025 and every year after, until the legislature changes it. The governor’s office called the 2025 reduction the largest income tax cut in state history, estimating it returned $253 million to taxpayers.1Office of the Governor. Idaho Delivers Largest Income Tax Cut in State History The rate replaced a graduated bracket system that was collapsed into a flat 5.8% in 2023, then trimmed to 5.695% in 2024 before reaching 5.3%.
For 2025 returns filed in 2026, single filers pay nothing on the first $4,811 of taxable income and 5.3% on anything above that. Married couples filing jointly pay nothing on the first $9,622 and 5.3% on the rest.2Idaho State Tax Commission. Individual Income Tax Rate Schedule Because that first slice is taxed at zero, lower-income filers see an effective rate below 5.3%.
Idaho conforms its standard deduction to the federal amounts. For 2026 that means $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for head of household. If your 2024 or early-2025 paychecks were withheld at the older, higher rate, the difference showed up as a larger refund or smaller balance when you filed.
Corporate and Pass-Through Businesses
Idaho locks its corporate income tax rate to the individual rate, so the corporate rate also fell to 5.3% for 2025 and later years.3Idaho State Legislature. Idaho Code 63-3025 – Tax on Corporate Income The tax applies to C-corporations transacting business in Idaho or earning income attributable to the state. S-corporations are not taxed at the corporate rate because their income passes through to owners, who pay at the individual rate.
For pass-through owners of S-corps, partnerships, and sole proprietorships, the federal Section 199A qualified business income deduction continues to apply. It allows up to a 20% deduction of qualified business income on the federal return, with the phase-in threshold for 2026 beginning at $201,750 for single filers and $403,500 for joint filers. Paired with Idaho’s 5.3% state rate, the combined picture for pass-through owners is relatively light.
Property Tax Relief Routed Through Schools
Idaho’s main property tax cut works indirectly. The state sends money to school districts earmarked for existing debt, and districts must reduce the property tax levies they would otherwise collect by the amount received. House Bill 521 in 2024 committed roughly $1.5 billion in new school facilities funding over a decade on top of the mechanism created in 2023.4Idaho State Tax Commission. 2024 Taxable Values and Property Taxes
Districts must spend the money in a fixed order: existing bonds issued before July 1, 2025 first, then supplemental levies, then plant facility levies. Only after those obligations are covered can a district direct remaining dollars to new construction, renovation, or a reserve for future facility needs.5Idaho State Legislature. Idaho Code 33-911 – School Funds Every dollar received must be subtracted from the property taxes local homeowners would otherwise pay for the same expenses. Districts certify the amount received when they file their annual budgets, which ties the state funding to the reduction on your bill.
For a homeowner, this shows up as a smaller school-related line on the property tax statement. How much smaller depends on how much bond and levy debt your district carries.
Homeowner’s Exemption and the Circuit Breaker
Two long-standing programs sit alongside the school funding mechanism and apply directly to your parcel.
Homeowner’s Exemption
The homeowner’s exemption removes 50% of the assessed value of your primary residence from property taxation, capped at $125,000 of exempt value.6Ada County Assessor. Homeowners Tax Relief A home assessed at $200,000 has $100,000 shielded; a home assessed at $400,000 or more has the full $125,000 shielded. Starting January 1, 2026, House Bill 354 prorates the exemption based on the number of days you qualified during the year, so a mid-year move no longer forces an all-or-nothing result.
Property Tax Reduction (Circuit Breaker)
The property tax reduction program can cut property taxes by $250 to $1,500 on your home and up to one acre for 2026.7Idaho State Tax Commission. Property Tax Reduction Your 2025 income after medical expenses must be $39,130 or less, and you must be 65 or older, blind, widowed, disabled, a former prisoner of war, or a parentless child under 18. You have to own and occupy the home as your primary residence and have the homeowner’s exemption in place. Applications run January 1 through April 15, 2026.
Grocery Tax Credit
Idaho still charges its 6% sales tax on groceries,8Idaho State Tax Commission. Sales and Use Taxes Basics Guide and the grocery tax credit on your income tax return offsets some of that cost. For 2025 and later years, the credit is $155 per person, covering you, your spouse, and each dependent.9Idaho State Legislature. Idaho Code 63-3024A – Food Tax Credits and Refunds That is up from $120 in 2023 and 2024. A family of four claims $620. If the credit exceeds what you owe in state tax, Idaho pays you the difference as a refund, and residents who are not required to file a return can still claim it through a simplified application.
Starting with 2025 returns, you can skip the flat amount and instead submit scanned grocery receipts, claiming the actual sales tax paid on food up to $250 per person.9Idaho State Legislature. Idaho Code 63-3024A – Food Tax Credits and Refunds The receipt method beats the flat credit once you spend more than about $2,583 per person per year on groceries, since 6% of that figure equals $155. For a family of four that spends heavily on food, the maximum climbs to $1,000 versus the $620 flat amount, in exchange for keeping receipts all year.
One restriction: if a household member received federal SNAP benefits during the year, that person’s credit is prorated based on the months they did not receive assistance. Three months on SNAP and nine months off produces three-quarters of the credit.
How Idaho’s Cuts Affect Your Federal Return
A smaller state tax bill changes a few numbers on the federal side.
More Room Under the SALT Cap
If you itemize federally, state and local income, sales, and property taxes combined are deductible up to the SALT cap, which is $40,400 for most filers and $20,200 for married filing separately in 2026. Because Idaho’s 5.3% rate pulls less of your SALT cap into income taxes, more room is left for property tax deductions. For many Idaho homeowners, that increases the federal benefit of the property taxes they still pay.
Taxability of a State Refund
If you itemized last year and deducted Idaho income taxes, part or all of your Idaho refund may be taxable on this year’s federal return. Idaho issues Form 1099-G showing the refund amount. The refund is only taxable to the extent it produced a federal tax benefit; if your SALT deduction was already capped and the refund falls within the capped portion, it generally is not taxable.
No State Estate or Inheritance Tax
Idaho imposes no estate tax, inheritance tax, or gift tax. The state’s estate tax expired in 2004 and was not reinstated.10Idaho State Tax Commission. Estates and Taxes Idaho residents only need to plan around federal estate tax, where the 2026 exemption is $15 million per person, or $30 million combined for married couples.