Bought an Idaho Home in 2026? File Your Homeowner's Exemption by Dec. 31

By James Brazil

James Brazil lives in Mérida, Mexico. He founded Swift Agent Sites and studied Classics at the University of Mississippi.

Published 4 November 2026 · Updated 4 November 2026

Real estate for buyers

If you bought and moved into an Idaho home in 2026, apply for the homeowner's exemption with your county assessor by the close of business on the last business day of the year, which is Thursday, December 31, 2026. It exempts 50% of your home and up to one acre of land from property tax, capped at $125,000.

It doesn't happen automatically. The exemption doesn't transfer with the house, and the title company doesn't file it for you. If you closed this year, especially if you're new to Idaho, this is worth fifteen minutes before the holidays.

What is the Idaho homeowner's exemption?

It's a property tax break for owner-occupied primary homes, set out in Idaho Code 63-602G. According to the Idaho State Tax Commission, it exempts 50% of the value of your home and up to one acre of land, up to a maximum of $125,000. That cap has been $125,000 since 2021.

A quick example. If your house and lot are assessed at $500,000, half would be $250,000, so the $125,000 cap applies and your taxable value drops to $375,000. On a $200,000 home, the full 50% ($100,000) would come off.

It also unlocks another credit. Under House Bill 292, passed in 2023, Idaho sets aside a share of state sales tax for homeowner property tax relief, and Ada County says homes that qualify for the homestead exemption by the second Monday in July get that credit on their tax bill without a separate application.

Who qualifies?

You have to own the home and live in it as your primary residence. Houses and manufactured homes both count. Rentals and second homes don't.

Ada County's assessor lists a few practical requirements:

• Own and occupy the home on or before the last county business day in December
• Provide your full name, date of birth, address and previous address
• Provide your Idaho driver's license or Idaho ID number

If you just moved here and don't have an Idaho license yet, Ada County says you can still apply but must supply the Idaho license or ID number within 90 days of applying, or the exemption is denied. So don't put off that trip to the DMV.

What's the deadline for 2026?

For the current tax year, file by close of business on the last business day of the year. In 2026 that's December 31. Elmore County, for example, lists 5:00 p.m. on December 31.

There's good news for late filers. In 2026 the Legislature passed House Bill 843, and the Tax Commission's guidance says the exemption is no longer prorated by when you apply. If you qualify and file by year end, you get the full exemption for 2026.

If you apply after the second Monday in July, the full value may stay on the assessment roll, but the guidance says the county cancels the tax equal to the exemption you'd have received. The result is the same savings. The paperwork just looks different.

This is a separate deadline from Idaho's Property Tax Reduction program, sometimes called the circuit breaker. That program has an April 15 deadline and is for qualifying homeowners who are 65 or older, disabled, widowed or meet other conditions, with income limits.

How do you apply?

You apply with the assessor in the county where the home is, not with the state. Each county handles it a little differently.

• Ada County takes applications through an online form, or by mail, email or in person at 190 E. Front Street, Suite 107, in Boise.
• Elmore County says its applications aren't available online or through title companies.
• Other counties post forms on their assessor's website or at the office.

The Idaho State Tax Commission's homeowner's exemption page explains the rules and points you to county assessors. Keep a copy of what you submit and note the date.

Do you have to reapply every year?

No. Once it's approved, it stays in place until ownership changes or the home stops being your primary residence. You don't refile each year.

You do have to apply again if something changes. Ada County lists moving, adding or removing an owner, and transferring the home into a trust as changes that need a new application.

And if you had the exemption on your old Idaho home, HB 843 guidance says that older exemption is removed the year after the new one is granted. You can't keep both.

What should sellers and buyers watch at closing?

Property taxes in Idaho are usually prorated between buyer and seller at closing, based on the current bill. If the seller had the exemption and you don't file, your future bills can come in higher than the number you saw at closing.

Sellers moving within Idaho should file at the new home as soon as they move in. Buyers relocating from out of state should get the Idaho license sorted early, since the 90-day ID rule can sink an otherwise valid application.

While you're dealing with paperwork, check whether your new address sits in a mapped flood zone on FEMA's Flood Map Service Center, since it matters for insurance. FloodFireCheck explains how to read FEMA flood data in plain English. If you're new to the state and still sorting out coverage, see our guide to Idaho's 2027 health insurance changes, and if you're shopping for a home, read our look at the Boise-area housing market this fall.

FAQ

How much does the Idaho homeowner's exemption save?

It removes 50% of the assessed value of your primary home and up to one acre of land from property tax, up to $125,000. Your actual dollar savings depend on your local tax levy, which varies by county, city and taxing district.

Can I still get the exemption if I closed on my home in November or December?

Yes. You need to own and occupy the home and file with your county assessor by close of business on the last business day of the year. Under the 2026 law change, a qualifying application filed by then gets the full exemption.

Does the homeowner's exemption carry over from the seller?

No. It's tied to the owner who lives in the home. A new owner has to file a new application with the county assessor.

Do I need an Idaho driver's license to apply?

You need to provide an Idaho driver's license or Idaho ID number. If you've lived in Idaho fewer than 90 days and don't have one yet, counties like Ada let you apply and then provide the number within 90 days.

Next step

If you're buying or just bought, a licensed local real estate agent can walk you through how property taxes were prorated at closing, point you to the right county assessor, and flag anything else new Idaho owners tend to miss in their first year.

Sources: Idaho State Tax Commission homeowner's exemption page and April 7, 2026 HB 843 guidance memorandum; Ada County Assessor; Elmore County Assessor; Idaho State Tax Commission April 7, 2026 press release.