Are property taxes lower in Washington or Idaho?

Idaho wins on property tax, generally speaking. Kootenai County’s effective property tax burden runs below Spokane County’s, and Idaho layers a homeowner’s exemption on top for owner-occupied primary residences. But the rate is only half the equation — the other half is the assessed value it applies to, and Idaho-side homes near the line tend to cost more. Property tax is also one line on a much bigger ledger that includes Washington’s lack of a personal income tax.

How the two systems actually differ

Both states assess property tax locally — the county assessor sets the taxable value, and the bill is a stack of levies from the county, city, school district, fire district, and library. The structural differences:

• Idaho offers a homeowner’s exemption that shields a portion of a primary residence’s value from taxation. It applies only to owner-occupied homes, so second homes and rentals in Kootenai County don’t get it.
• Washington has no equivalent broad exemption for primary residences, though limited programs exist for qualifying seniors and people with disabilities.
• Washington also charges a graduated real estate excise tax when you sell, which Idaho does not. That’s a transaction cost, not an annual one, but it belongs in the comparison if you plan to move again.

For current figures, go to the source: the Spokane County Assessor, the Kootenai County Assessor, the Washington Department of Revenue, and the Idaho State Tax Commission publish the actual levy rates and exemption amounts each year.

The price-tag wrinkle

A lower rate on a more expensive house can produce a similar bill. As of June 2026, the median asking price in Coeur d’Alene was $749,900 and in Hayden $799,999, against $449,000 in Spokane and $465,000 in Spokane Valley. Post Falls sat between at $577,900. So a buyer comparing a Spokane Valley house to a comparable Post Falls house may see a real annual savings on the Idaho side — but a buyer trading up in price to get into Coeur d’Alene may not. Run the math on the specific house, not the headline rate. Our market reports track current pricing on both sides of the line.

Property tax is one line, not the whole ledger

The full picture cuts both ways. Idaho has a state income tax; Washington doesn’t. Washington’s sales tax structure is heavier; Idaho’s is lower but applies to groceries. Washington has an estate tax; Idaho doesn’t. Which side comes out ahead depends on your income mix, retirement status, and how long you plan to hold the home. We walk through the whole comparison in our Washington vs Idaho tax guide, and for anything beyond general information, a CPA who knows both states is worth the hour.

What to do before you commit to a side

Pull the actual tax history on any house you’re serious about — both county assessors publish parcel records online, and the prior year’s bill is a far better predictor than any average. Then confirm whether the Idaho homeowner’s exemption would apply to your situation, since investment and second-home buyers don’t get it. We write contracts in both states every month, so we see how these bills land in practice on real closings.

If you want the numbers run on a specific house or a side-by-side for your situation, reach out and we’ll walk through it.