Washington property taxes are due April 30 and October 31 each year
Washington State splits property tax payments into two installments. The first half is due by April 30, and the second half is due by October 31. Both dates are firm — if your payment arrives after midnight on those dates, it is considered late, and you will owe a penalty.
Your county assessor sends a tax statement in the mail before each important date. The statement shows what you owe, where to send payment, and the exact due date for your county (a few counties have slightly different rules, so check your statement). If you do not receive a statement, contact your county treasurer's office — not receiving it does not extend your important date.
Payment methods vary by county. Most accept checks by mail, online payment through their website, phone payment, or in-person payment at the treasurer's office. Some counties also accept credit card or electronic bank transfer, though credit card payments often carry a processing fee.
Key Takeaways
- Property taxes in Washington are due April 30 for the first half and October 31 for the second half, with no grace period.
- Your county assessor mails a tax statement before each important date that shows the exact amount owed and payment instructions for your county.
- Late payments trigger a penalty starting November 1 for spring taxes and May 1 for fall taxes, calculated as a percentage of the unpaid amount.
- Most counties allow online payment through their treasurer's website, which is faster and creates a dated record of when you paid.
- If you cannot pay by the important date, contact your county treasurer to ask about payment plans or hardship deferrals before the penalty date.
What happens if you miss the important date
A penalty of 1% per month accrues on unpaid taxes starting the day after the important date. For spring taxes (due April 30), the penalty clock starts May 1. For fall taxes (due October 31), it starts November 1. The penalty compounds monthly, so the longer you wait, the more you owe on top of the original tax bill.
If taxes remain unpaid for three years, the county can foreclose on the property and sell it at a tax deed sale. This is a real consequence — the county has a legal right to recover the money owed, and your home can be sold to satisfy the debt. However, Washington law gives you a redemption period after a tax deed sale during which you can reclaim the property by paying the full amount owed plus costs.
If you are struggling to pay, do not wait until after the important date to act. Contact your county treasurer's office before April 30 or October 31 and explain your situation. Some counties offer payment plans that let you spread the payment over several months without triggering the full penalty, or they may defer taxes under hardship rules.
How to pay your property taxes
Start by locating your county treasurer's office website — search "[your county name] treasurer" to find the payment portal. Most counties display their current tax statements online, and you can pay directly through their website using a bank account or debit card. Online payment usually posts within one to three business days and gives you an when ready confirmation number.
If you prefer to mail a check, write the check to your county treasurer and include the tax statement or account number on the memo line. Mail it early enough that it arrives by the important date — the postmark date does not count, only the date received. If you are cutting it close, pay in person at the treasurer's office or use online payment instead.
Some counties accept phone payments or automatic bank drafts set up in advance. Ask your county treasurer whether they offer these options and what the process is. Automatic payment can be useful if you want to may support you never miss a important date, though you should still verify the payment went through each time.
Finding your county treasurer and tax information
Washington has 39 counties, and each one handles property tax collection independently. Your county treasurer's office is the only place that can tell you your exact balance, accept your payment, or discuss payment plans. You can find contact information by searching "[your county] treasurer" online or by calling your county's main line and asking for the treasurer's office.
Many county treasurer websites now allow you to look up your property tax account by parcel number or address, see your current balance, and view payment history. If you have recently bought a home, the previous owner's name may still be on the mailing list — contact the assessor's office to update the owner information so you receive future statements.
If you own property in multiple counties, each county will send you a separate statement and has its own important date. Keep track of all of them, because missing one important date does not excuse you from the others.
Payment plans and hardship deferrals
If you cannot pay the full amount by the important date, your county treasurer may allow you to set up a payment plan. This typically lets you pay in installments over several months without the full 1% monthly penalty. The exact terms depend on your county and your situation — some require you to pay a portion by the important date and the rest in installments, while others may defer the entire amount.
Washington also has a property tax deferral program for homeowners who are elderly, disabled, or low-income. If you may have access to, you can defer paying property taxes for one or more years, though the taxes still accrue and must be paid eventually (usually when the property is sold or transferred). The deferral program has income and home value limits that vary by year, so contact your county assessor to learn whether you may be may be able to access.
To explore either option, call your county treasurer's office before the important date and explain your situation. They cannot waive the tax, but they can often work with you to prevent a foreclosure or large penalty. Acting before the important date shows good faith and gives you more options than waiting until after.
Automatic payment and reminders
If you own your home outright, you are responsible for paying property taxes directly. If you have a mortgage, your lender may require you to pay property taxes through an escrow account — the lender collects the money each month along with your mortgage payment and pays the county on your behalf. Check your mortgage documents or call your lender to confirm whether they handle this.
Even if your lender pays through escrow, you should know when the important date are. Errors happen, and if the lender fails to pay, the county will pursue you for the debt, not the lender. Some homeowners set a phone reminder for mid-April and mid-September to double-check that payment has been made.
If you pay online, most county websites let you save your payment information and set up a one-time or recurring payment. This reduces the chance of forgetting and gives you a digital record of every payment.
Frequently Asked Questions
What if I pay after the important date but before the penalty date?
If you pay between the important date and the first day of the next month (May 1 for spring taxes, November 1 for fall taxes), no penalty is charged. Once the penalty date passes, even a one-day delay triggers the 1% penalty. Pay as soon as possible after the important date if you miss it.
Can I pay property taxes online in Washington?
Most Washington counties offer online payment through their treasurer's website. Search your county name plus "treasurer" to find the payment portal. Some counties charge a small processing fee for credit card payments, but bank account payments are usually free.
What if my property tax statement never arrived?
Contact your county treasurer's office when ready. Not receiving the statement does not extend the important date. The treasurer can tell you the amount owed and accept payment over the phone or online. Update your mailing address with the assessor's office to prevent future missed statements.
Do I have to pay property taxes if I am selling my home?
Yes, property taxes are due on the important date regardless of whether the home is being sold. At closing, the seller and buyer typically split the year's taxes based on the sale date, but both parties remain liable to the county until the deed transfers. Your title company handles this calculation at closing.
What happens if property taxes go unpaid for several years?
After three years of unpaid taxes, the county can foreclose and sell the property at a tax deed sale. You have a redemption period after the sale (the length varies by county) during which you can reclaim the property by paying all back taxes, penalties, and costs. If you do not redeem, the new owner receives the deed and you lose the property.