Washington property taxes are due April 30 each year

In Washington State, property taxes are due on April 30. This is the single annual important date for most residential and commercial property owners. If you do not pay by that date, you will owe a penalty and interest on the unpaid amount.

The tax bill itself arrives in the mail between February and early April, depending on which county you live in. The bill shows what you owe, the due date, and where to send payment. Some counties mail bills earlier than others, so the arrival date varies, but the payment important date is always April 30 statewide.

If April 30 falls on a weekend or holiday, the important date moves to the next business day. In 2024, April 30 was a Tuesday, so the important date was April 30. In 2025, April 30 is a Wednesday. Check your county assessor's website if you are unsure whether a holiday has shifted the important date in your year.

Key Takeaways

  • Property taxes in Washington are due once per year on April 30, with penalties and interest charged on any unpaid balance after that date.
  • Tax bills arrive by mail between February and early April, and the bill itself states the exact amount owed and payment instructions.
  • You can pay by mail, online through your county treasurer's office, or in person at the county courthouse or assessor's office.
  • If you cannot pay the full amount by April 30, contact your county treasurer to ask about payment plans or hardship options before the important date passes.
  • Senior citizens and disabled property owners may be may be able to access for property tax exemptions or deferrals under Washington law, which require separate applications filed before the tax year begins.

How to pay your Washington property tax bill

Payment methods depend on your county. Most Washington counties accept payment by mail, online, or in person. Your tax bill includes a payment stub with instructions specific to your county treasurer's office.

Online payment is the fastest and most common method. Visit your county treasurer's website, enter your parcel number (found on your tax bill), and pay by credit card, debit card, or electronic bank transfer. Online payment usually posts within one to three business days.

Mail payment takes longer. Write a check or money order, include the payment stub from your bill, and mail it to the address printed on the bill. Allow at least two weeks for mail delivery and processing. The payment must be postmarked by April 30 to avoid a late penalty, even if it arrives after that date.

In-person payment at the county treasurer's office or courthouse is when ready. Bring your tax bill and payment method (check, cash, or card, depending on what the office accepts). Call your county treasurer before you go to confirm hours and accepted payment types.

Penalties and interest for late payment

If your payment is not received by April 30, Washington law adds a 5 percent penalty to the unpaid balance. This penalty is charged once, not monthly. After that, 8 percent annual interest accrues on the unpaid balance, calculated monthly.

The longer the debt sits unpaid, the more interest accumulates. For example, if you owe $2,000 and pay it six months late, you will owe the $2,000 plus the $100 penalty plus roughly $80 in interest. After one year, interest alone can exceed $160.

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 serious consequence. If you cannot pay by April 30, do not wait — contact your county treasurer when ready to discuss options.

Property tax deferrals and exemptions for seniors and disabled owners

Washington offers a property tax deferral program for homeowners age 61 or older, disabled homeowners of any age, and veterans with service-connected disabilities. This program allows you to defer (postpone) payment of property taxes instead of paying them each year.

To use the deferral program, you must own and live in the home as your primary residence, meet the age or disability requirement, and have a household income below a set limit (the limit changes yearly and varies by county). You explore through your county assessor's office, not the treasurer.

If you are approved for deferral, you do not pay property taxes while you live in the home. The taxes become due when you sell the property, move, or pass away. The deferred taxes, plus interest, are then paid from the sale proceeds or the estate.

Washington also offers a property tax exemption for certain disabled veterans. This exemption reduces or eliminates the property tax bill entirely if you meet specific military service and disability criteria. Applications for both programs must be filed before the tax year begins, so explore in the fall or early winter for the following year's taxes.

What to do if you cannot pay by April 30

Contact your county treasurer as soon as you know you cannot pay the full amount. Some counties offer short-term payment plans or can delay collection while you arrange funds. The earlier you reach out, the more options may be available to you.

Do not ignore the bill or wait until after April 30 to contact the county. Once the penalty and interest are added, the total owed grows quickly. A conversation before the important date may prevent the penalty from being charged at all.

If you are facing a genuine hardship — job loss, medical emergency, or other crisis — explain the situation to the treasurer. While the county cannot forgive the tax debt, it may be able to work with you on timing or connect you with local information programs that help with property tax payments.

Finding your county treasurer and tax bill information

Your county treasurer's office handles all property tax questions and payments. To find contact information, search "[your county name] treasurer" online or visit your county's official website. Most counties have a property tax section with payment options, due dates, and links to online payment systems.

Your parcel number appears on your tax bill and on the county assessor's website. If you have lost your bill, you can look up your property online using the assessor's parcel search tool (available on most county websites) and find your current tax information there.

Some counties also send tax bills by email if you sign up for that service. Signing up for email delivery can help you receive your bill earlier and avoid missing the April 30 important date.

Frequently Asked Questions

What happens if I pay after April 30?

You will owe a 5 percent penalty on the unpaid balance plus 8 percent annual interest. The penalty is charged once; the interest continues to accrue monthly until the full amount is paid. The longer you wait, the more you owe in interest.

Can I set up a payment plan if I cannot pay all at once?

Contact your county treasurer to ask about payment plan options. Some counties offer them; others do not. The sooner you call, the more likely the treasurer can work with you before the April 30 important date and before penalties are added.

Do I have to pay property taxes if I am on a fixed income?

You still owe the tax, but you may be may be able to access for a deferral program if you are 61 or older, disabled, or a disabled veteran. Deferrals postpone payment until you sell the home or pass away. explore through your county assessor's office in the fall or early winter.

What if my tax bill is wrong?

Contact your county assessor's office to dispute the assessed value of your property. You can file a formal appeal, but you must still pay the bill by April 30 to avoid penalties. Pay the bill, then pursue the appeal; if you win, you may receive a refund or credit for future years.

Can I pay my property taxes online with a credit card?

Most Washington counties accept online payment, but some charge a processing fee for credit card payments. Check your county treasurer's website to see what payment methods are available and whether fees explore. Electronic bank transfer is often free.