Idaho Property Taxes:
What Every Homeowner
Needs to Know

If you're buying a home in the Treasure Valley — or you already own one — property taxes are one of those costs people underestimate until they get their first bill. Idaho actually has some of the most buyer-friendly tax rules in the country. But you have to know how to use them.

Here's everything you need to know: how Idaho property taxes work, what the homeowner's exemption is worth, and what the recent changes in Boise mean for your wallet.

How Idaho Property Taxes Actually Work

Property taxes in Idaho are calculated based on your home's assessed value — set annually by the county assessor — multiplied by the local tax levy rate for your area. In Ada County, the effective tax rate runs roughly 0.6% to 0.8% of assessed value for owner-occupied homes after exemptions. That's significantly lower than most states.

For comparison: California's effective rate is around 0.73%, Texas is 1.6%, and Florida is 0.8%. Idaho competes well — especially when you factor in the homeowner's exemption.

The Homeowner's Exemption: Don't Skip This

Idaho's homeowner's exemption is one of the most valuable things you can claim as a new homeowner — and a lot of people don't know it exists.

Here's how it works: if you own and occupy your home as your primary residence, you can exempt 50% of your home's assessed value, up to $125,000, from property taxes. You only need to apply once — and you need to apply with your county assessor.

On a $500,000 home, that exemption removes $125,000 from your taxable value. At a 0.75% effective rate, that's roughly $937 in annual savings. Over five years, that's nearly $5,000 you leave on the table if you forget to file.

What About Investment Properties and Second Homes?

The homeowner's exemption only applies to your primary residence. If you own a rental property or second home in Idaho, you pay the full assessed rate — no exemption. This is important to factor in when analyzing rental income potential on investment properties.

Investment properties in Ada County at a $400K assessed value run roughly $3,200–$4,000/year in property taxes depending on the levy area. Canyon County is slightly lower.

Boise's Proposed Tax Increase — What Changed

In June 2026, Boise Mayor Lauren McLean revised the city's FY27 budget proposal, cutting the proposed property tax increase from 4% down to 2.7%. That change saves Boise residents a combined $2.9 million compared to the earlier version.

The revised budget reflects a push to tighten spending, delay low-priority projects, and focus resources on housing, core infrastructure, and public safety. The city council still needs to approve it — public meetings are scheduled before the vote later this year.

For current Boise homeowners, the practical impact is modest — but it's a signal that the city is hearing the concerns around housing costs. And for buyers considering Boise vs. the suburbs, it's worth tracking.

When Are Property Taxes Due in Idaho?

Idaho property taxes are billed twice a year:

• First half due December 20th
• Second half due June 20th

Most homeowners with a mortgage pay through an escrow account — your lender collects monthly and pays the bills for you. If you own free and clear or have a loan without escrow, mark those dates on your calendar.

How to Apply for the Homeowner's Exemption

You apply through your county assessor's office. In Ada County, you can file online at adacountyassessor.org or in person. The deadline to apply is April 15th for the current tax year.

If you moved into your home in 2026, apply now. The exemption doesn't apply retroactively — you have to file.

The Bottom Line

Idaho's property tax structure is genuinely favorable for primary homeowners. The key is knowing what you qualify for and actually filing. For investors and second-home buyers, taxes are higher than most people expect — run the numbers before you close.

Have questions about what property taxes will look like on a specific home you're considering? I run through those numbers with every buyer I work with — it's part of understanding your true monthly cost. Reach out and let's talk.