When you are budgeting to buy a home in Seattle, the mortgage payment gets all the attention. Property taxes are the line item most first-time buyers underestimate, and in King County they are not small.
I have sat across from buyers who found a home right at the top of their budget, then realized the monthly number was a few hundred dollars higher than they planned once taxes were folded in. Here is how Seattle property taxes actually work in 2026, what you can expect to pay, and how to build them into your budget before you fall for a house.
How Seattle Property Taxes Actually Work
Washington does not have a state income tax, so property taxes carry more of the load here than they do in a lot of other states. They fund schools, roads, emergency services, libraries, and a long list of local levies that voters approve at the ballot box.
Two numbers decide your bill. The first is your home's assessed value, which the King County Assessor sets each year. The second is the combined levy rate for your specific location, expressed as a dollar amount per 1,000 dollars of assessed value. Multiply the two and you have your annual tax.
Your levy rate depends on exactly where the home sits. Two houses a few blocks apart can fall into different school or taxing districts and end up with different rates. That is why I always tell buyers not to assume a neighborhood average applies to the specific house in front of them.
What You Will Actually Pay
For 2026, the levy rate inside Seattle works out to roughly 9.9 dollars per 1,000 dollars of assessed value, which lands close to a 1 percent effective rate. On a home assessed near the Seattle median of about 865,000 dollars, the annual tax bill runs in the neighborhood of 7,700 to 7,800 dollars. That is real money, and it shows up every year for as long as you own the home.
Here is a simple way to sanity check any listing. Take the price, move the decimal two places to the left, and you are close to the annual tax. A 900,000 dollar home is roughly 9,000 dollars a year, or about 750 dollars a month folded into your payment. It is a rough estimate, not a quote, but it keeps you honest while you shop.
Rates drift year to year as levies pass and assessed values change. Countywide, the total property tax collected for 2026 rose about 10 percent over the prior year, so this is not a fixed number you can set and forget.
How You Actually Pay Them
Most buyers never write a separate check for property taxes. If you have a mortgage, your lender usually collects one twelfth of the estimated annual bill with each monthly payment and holds it in an escrow account. When the county bill comes due, your servicer pays it for you.
King County splits the bill into two installments, due April 30 and October 31. If you pay through escrow, your lender handles those dates. If you own free and clear or choose to pay the taxes yourself, those two deadlines are on you, and late payments carry interest and penalties.
One thing that catches people off guard: escrow accounts get reviewed every year. If your assessed value jumps or a new levy passes, your monthly payment can rise even though your loan itself did not change. It is worth planning for a modest bump rather than being surprised by one.
How to Budget Before You Buy
Do not rely on the tax figure shown in an old listing or a national estimate. Pull the actual parcel on the King County Assessor's site and look at the current assessed value and the taxes billed. That is the closest thing to a real number you will get before closing.
Watch the first-year quirk, too. The tax bill on a home often reflects the previous owner's assessed value, and reassessments can lag a sale. If you buy a home that was under-assessed, your bill may climb once the county catches up. I would rather a buyer plan for that possibility now than get surprised by an escrow shortage a year in.
When I run numbers with buyers, I fold taxes and insurance into the monthly figure from day one. Principal and interest is only part of the story. The full picture is what tells you whether a house actually fits your life.
Exemptions and Ways to Push Back
If you are a senior, a veteran with a disability, or living on a fixed or limited income, King County has property tax exemption and deferral programs that can meaningfully lower what you owe. They have income thresholds and an application, and they are underused mostly because people do not know they exist.
You can also appeal your assessed value if you believe the county has it too high. There is a filing window and you will need comparable sales to make your case, but a successful appeal lowers your bill for more than just one year.
Property taxes are not the exciting part of buying a home, but they are one of the easiest places to get your budget wrong, and one of the easiest to plan for once you know how the math works. If you are thinking about buying in Seattle and want help running the real monthly numbers on a specific house, taxes and all, reach out. My team at Emerald Group does this every day, and I would rather you walk in with clear eyes than get surprised after the keys are in your hand.
Ready to buy in Seattle? Brennen Clouse at Emerald Group is here to help. Call or text 206-899-9101 or visit emeraldgroupre.com.
