Moving into a Mason County home means inheriting a property tax calendar that may look different from what newcomers are used to — especially if the last place you owned was outside Washington State. The first-half 2026 Mason County property tax payment is due Thursday, April 30, 2026, and new homeowners in Shelton, Belfair, Allyn, Union, Hoodsport, and the rest of the county need to know how the system works before that date. Here is the practical walkthrough for anyone paying a Mason County property tax bill for the first time.

How Mason County Property Tax Differs From What You May Be Used To

Washington State does not levy an income tax, which pushes more of the cost of local services — sheriff, roads, schools, public health, courts — onto property taxes than most other states. Mason County, like all 39 counties in Washington, collects property tax twice a year rather than monthly through an escrow account (although many mortgage servicers still escrow monthly and pay the county on your behalf twice a year). The key dates are:

• April 30 — first-half payment due
• October 31 — second-half payment due

If your mortgage servicer escrows your taxes, the servicer pays these bills directly from your escrow account and you typically will not receive a payment notice from Mason County. If you own free and clear — or if you are a new buyer in a cash sale or a buyer whose lender does not escrow — the responsibility is entirely yours, and the Treasurer does not send reminders beyond the initial bill mailed earlier in the year.

How to Confirm Whether You Owe Directly or Through Escrow

New residents often ask: did I already pay this in closing? The answer depends on the closing date and the terms of the sale. A portion of the annual tax is usually prorated between buyer and seller at closing, but that proration only covers the days the seller owned the home — not the tax bill itself. If closing happened before April 30, the outstanding first-half bill is typically paid at or before closing. If closing happened after April 30, the first half has usually already been paid by the seller and the buyer’s first real bill is the October 31 second half.

To know for sure, log into the Mason County Property Tax Inquiry at masoncountywa.gov or call the Treasurer’s Office at 360-427-9670, extension 484. You will need your parcel number or property address to look up the current status of the tax account. If the balance shows as paid, nothing is due. If the balance shows as unpaid, you owe it by April 30 regardless of anything else.

How to Actually Pay It

Mason County accepts three payment methods. Each works. Pick whichever fits the day you realize you owe.

• Online through Point & Pay — Access from masoncountywa.gov. Accepts Visa, MasterCard, Discover, American Express, and E-checks. A 2.5% credit card fee applies ($2 minimum); E-check fees are typically lower for larger amounts.
• By phone — Call Point & Pay at 1-855-331-3631. Same cards accepted as online. Visa Debit and E-Checks are not available through the phone system — use the web portal for those.
• In person or by mail — Mason County Treasurer’s Office, 411 N. 5th Street, Shelton, WA. Mailed payments must be postmarked on or before April 30, 2026, to be on time. Make checks payable to the Mason County Treasurer and write the parcel number on the memo line.

What Is on Your Mason County Property Tax Bill

A Mason County property tax bill is not a single tax — it is a stack of levies from different taxing districts layered onto the property. A typical Mason County bill includes:

• County general fund (sheriff, roads, courts, treasurer, assessor, auditor)
• State school levy (Washington’s contribution to public education)
• Local school district levy (e.g., North Mason School District if the property is in the Belfair–Allyn–Tahuya area, or Shelton School District, or the Hood Canal or Pioneer districts depending on address)
• Fire district levy (which district depends on address)
• Library district levy
• Port district levy (Port of Shelton, Port of Allyn, Port of Hoodsport, etc.)
• Hospital district or public utility district assessments where applicable
• Conservation district fee

All of this is rolled into the single “total due” number on the bill. Each district’s rate is set annually, which is why the tax bill can change from year to year even when the assessed value of the home is flat. For new residents trying to understand why a neighbor’s bill looks different, the answer is almost always a different combination of taxing districts — a home in the city of Shelton pays different levies than a home in unincorporated Mason County outside any city limit.

The Other Civic Deadline Newcomers Should Know About

New residents who live in the North Mason School District (Belfair, Allyn, Tahuya) also have a special election on April 28, 2026, on a replacement Educational Programs & Operations levy that the district has asked voters to approve. That’s a school-funding question on its own timeline — the April 28 ballot — separate from the April 30 tax-payment deadline. If you recently registered to vote at your new Mason County address, your ballot has already been mailed. For coverage of what’s on that ballot, see our report on the North Mason School District levy.

If You Are New and Overwhelmed

The single most useful phone call a new Mason County resident can make is to the Treasurer’s Office at 360-427-9670, extension 484. The staff there can pull up your parcel in seconds, tell you exactly how much you owe for the first half, whether any portion was paid at closing, whether your mortgage servicer is handling it, and what your options are if you need a payment plan. For a broader orientation to the county you just moved into, our guide on living in Mason County, Washington covers most of the other questions newcomers ask in their first year.

Frequently Asked Questions

I just moved to Mason County. Do I owe property tax by April 30?

It depends on your closing date and whether your mortgage escrows taxes. If closing happened before April 30, 2026, the first-half tax is usually paid at closing or is in the buyer’s hands to pay by April 30. If closing happened after April 30, the first half has usually already been paid by the seller, and the next bill you owe is the October 31 second half. Call the Mason County Treasurer at 360-427-9670 extension 484 with your parcel number to confirm your specific status.

Does my mortgage company pay my Mason County property tax?

Possibly. If your mortgage includes an escrow account for taxes and insurance, the servicer collects a portion of your monthly payment and pays the Treasurer directly by April 30 and October 31. Check your most recent mortgage statement for an escrow account balance, or call your servicer. If you have no escrow account, the full responsibility for paying Mason County directly is yours.

What if I didn’t get a property tax bill from Mason County?

The Treasurer’s Office mails annual tax statements earlier in the year, but new residents who closed on a home mid-year often do not receive one because the mailing went to the prior owner or to the mortgage servicer’s address. A missing bill does not excuse the deadline. Look up your balance at masoncountywa.gov using your parcel number, or call the Treasurer at 360-427-9670 extension 484 to get the amount.

Can I set up monthly property tax payments in Mason County?

Mason County does not offer a standard monthly-installment program for property taxes in the way a mortgage servicer does. Washington state law authorizes two payments per year: half on April 30 and half on October 31. Taxpayers who cannot meet a deadline can contact the Treasurer’s Office at 360-427-9670 extension 475 to discuss a case-by-case payment plan. The most common “monthly” approach is to set up an escrow account voluntarily through your bank or to self-budget monthly and make the two large payments yourself.

Why does my Mason County property tax bill have so many line items?

Your bill is a stack of levies from every taxing district your property sits in — county general fund, state school levy, local school district, fire district, library district, port district, conservation district, and sometimes a hospital or PUD assessment. Each district sets its own rate annually. The “total” on the bill is the sum. Homes in different Mason County communities pay different totals because they sit in different combinations of districts, not because the county charges them more.

Mason County seniors who own their home and live in it full-time may be eligible for a Washington State property tax exemption that can substantially reduce the annual tax bill — but the exemption is not automatic, and the clock is ticking on the April 30, 2026, first-half payment deadline. This is what homeowners 61 and older in Shelton, Belfair, Allyn, Union, and every other Mason County community need to know about qualifying, applying, and what to do in the meantime.

Who Qualifies for the Mason County Senior Property Tax Exemption

Washington State’s senior citizen and disabled-person property tax exemption is administered at the county level. To qualify in Mason County, a homeowner generally must meet all of these conditions:

• Age or disability — Be 61 years or older by December 31 of the year before the exemption takes effect, or be retired from regular employment because of a physical disability, or be a disabled veteran with an 80% or greater service-connected disability rating.
• Ownership — Own the home as of December 31 of the qualifying year, and hold the title in the applicant’s name (or through a qualifying life estate or trust).
• Primary residence — Live in the home as a primary residence for at least nine months of the year.
• Income — Have a total household disposable income of $55,000 or less per year. Mason County’s income threshold was increased to $55,000 effective for the 2024 tax year and remains the qualifying ceiling for the current program.

Income under the program includes Social Security, pensions, IRA distributions, wages, rental income, interest, and dividends. Some items can be deducted — for example, non-reimbursed medical expenses and certain long-term care costs — which means households that look over the threshold on paper may still qualify once deductions are applied.

What the Exemption Actually Does to Your Tax Bill

The exemption is tiered by income. At the lowest income tier, a qualifying senior’s property value is frozen at the level it was when they first qualified (preventing future increases from raising the tax bill) and a portion of regular levy taxes is removed. At higher income tiers within the $55,000 ceiling, the reduction is smaller but still meaningful. For many Mason County seniors on fixed incomes, the difference between qualifying and not qualifying can run into the hundreds or low thousands of dollars per year.

The exemption does not apply to special assessments like fire district fees, local improvement districts, or conservation district fees. Those remain payable in full regardless of exemption status.

How to Apply Through the Mason County Assessor

Applications for the senior and disabled exemption go through the Mason County Assessor’s Office, not the Treasurer. This is an important distinction — the Treasurer collects taxes, but the Assessor determines who qualifies for the exemption that reduces those taxes in the first place.

Questions and application packets are available at 360-427-9670, extension 491. Applicants need to provide:

• Proof of age (birth certificate, driver’s license) or proof of disability (from Social Security, VA, or a physician)
• Proof the home is the primary residence
• Documentation of total household income — typically prior-year tax returns plus Social Security and pension statements

First-time applicants should plan for the process to take several weeks after paperwork is received. Retroactive refunds may be available if it turns out the applicant has qualified for prior years and was unaware of the program.

What to Do About the April 30, 2026, Deadline in the Meantime

If a qualifying senior has not yet applied — or has applied but not yet been approved — the April 30 first-half property tax payment is still due at the full amount. Missing the deadline creates interest and penalties that accrue beginning May 1, 2026, and those charges are not waived retroactively even if the exemption is later granted.

Mason County seniors who are close to the income threshold or think they may qualify should do two things right now: (1) pay the first-half bill by April 30 through any of the three available methods — in person at 411 N. 5th Street in Shelton, by mail postmarked on time, or online/by phone through Point & Pay at 1-855-331-3631; and (2) start the exemption application process through the Assessor so it is in place for the October 31 second-half bill and future years.

For broader payment guidance on the April 30 deadline, see our complete Mason County property tax payment guide. For the full picture of how the county government works and how the Assessor and Treasurer fit together, see how Mason County government works.

The Federal Deferral Program (Different From the Exemption)

Washington State also runs a property tax deferral program for seniors and disabled residents, separate from the exemption. The deferral does not reduce the tax — it delays payment, with the deferred amount becoming a lien against the property that is collected when the property is sold or transferred. The deferral program is useful for residents whose income qualifies but who want to preserve liquidity in a given year rather than reduce the long-term cost. The Assessor’s Office can explain both options during the application conversation.

Frequently Asked Questions

What is the income limit for the Mason County senior property tax exemption in 2026?

The current income threshold for the Mason County senior and disabled-person property tax exemption is $55,000 per year in total household disposable income. Mason County raised the limit from $40,000 to $55,000 effective for the 2024 tax year, and that threshold applies to the current program. Deductions for non-reimbursed medical expenses and long-term care costs can bring households under the ceiling even if gross income looks higher.

How do I apply for the Mason County senior property tax exemption?

Applications are filed with the Mason County Assessor’s Office, not the Treasurer. Call 360-427-9670 extension 491 to request an application packet. You will need to provide proof of age or disability, proof the home is your primary residence, and documentation of your total household income from the prior year. The application is not automatic and must be renewed periodically.

Do I still have to pay the April 30 property tax bill if I’ve applied for the senior exemption?

Yes. If your exemption has not yet been approved by April 30, 2026, you must pay the first-half property tax at the full billed amount. Interest begins accruing May 1 on any unpaid balance and is not waived even if the exemption is later granted. Once the exemption is approved, future bills reflect the reduction. Ask the Assessor’s Office whether you qualify for any retroactive refund for prior years you may have been eligible but unenrolled.

What’s the difference between the senior exemption and the senior deferral in Mason County?

The senior exemption reduces the amount of property tax owed for qualifying homeowners. The senior deferral program delays payment rather than reducing it — deferred amounts become a lien on the property that is paid when the property is sold or transferred. Both are administered through the Assessor’s Office. Seniors below the income threshold can generally choose either program based on their cash-flow needs.

Does the Mason County exemption apply to all property taxes?

No. The exemption applies to regular levy property taxes. It does not apply to special assessments such as fire district fees, local improvement districts, conservation district fees, or similar non-ad-valorem charges. Those continue to be billed and owed in full regardless of exemption status. The Treasurer’s Office can explain which portions of your specific bill are and are not subject to the exemption.

Mason County property owners have until Thursday, April 30, 2026, to pay the first half of their 2026 property taxes. The Mason County Treasurer’s Office has confirmed that delinquent charges begin Friday, May 1, 2026, and is urging anyone who can pay early to do so before last-minute mail and online backlogs create problems. Here is the complete payment guide for every property owner from Shelton to Dewatto — what you can pay, how you can pay, what it costs, and what happens if you miss the deadline.

April 30 Is a Hard Deadline Under State Law

Under Washington state law, property tax payments of $50 or more can be split into two halves: the first due on or before April 30 and the second due on or before October 31 of the same year. Payments under $50 must be paid in full by April 30. This is not a Mason County-specific rule — every county treasurer in the state enforces the same schedule — but Mason County Treasurer’s Office has reminded local taxpayers that mail delivery times through the USPS may be delayed, so payments should be mailed well ahead of the deadline.

Payments postmarked on or before April 30 are considered on time. After that, interest and penalties accrue on the unpaid balance beginning May 1.

Three Ways to Pay Your Mason County Property Tax

The Mason County Treasurer’s Office offers three primary methods for the 2026 first-half payment.

1. Pay in Person

The Mason County Treasurer’s Office is located at 411 N. 5th Street, Shelton, WA. In-person payments accept cash, check, cashier’s check, money order, and credit or debit cards. Office hours are generally Monday through Friday during standard business hours; Mason County residents making the trip should call ahead to confirm hours on the day of payment.

2. Pay by Mail

Mail-in payments must be postmarked on or before April 30, 2026, to be considered on time. The Treasurer’s Office recommends mailing early — delivery windows through the USPS can stretch several business days, and a payment received after the deadline but postmarked on time is still credited as timely. Checks should be payable to the Mason County Treasurer and include the property account number or parcel number on the memo line.

3. Pay Online or by Phone

Mason County uses Point & Pay for online and telephone credit/debit card processing. The online portal is accessible from masoncountywa.gov, and the automated phone payment system can be reached at 1-855-331-3631. Accepted cards are Visa, MasterCard, Discover, and American Express. Visa Debit and E-Checks are not available over the phone but are available online.

A processing fee applies to credit card payments: 2.5% of the amount due, with a $2.00 minimum. E-checks carry a flat fee that is generally lower than the card fee for larger payments; the exact amount is disclosed at checkout on the Point & Pay portal.

What If You Can’t Pay the Full Amount by April 30?

Mason County offers payment plan arrangements for taxpayers who cannot pay in full by the deadline. These are not advertised on the standard payment page — they are handled case-by-case through the Treasurer’s Office at 360-427-9670, extension 475. Interest generally continues to accrue on the unpaid balance during a payment plan, so contacting the office before April 30 typically produces a better outcome than waiting until after the deadline has passed.

Senior and Disabled Property Tax Exemptions

Mason County participates in Washington State’s senior citizen and disabled-person property tax exemption program. The program can reduce or freeze the taxable value of a primary residence for qualifying owners. Eligibility generally requires the applicant to be 61 years or older, or to be disabled, and to own and occupy the home as a primary residence. The income threshold for Mason County was raised to $55,000 per year effective for the 2024 tax year and remains the current qualifying ceiling for the program.

The exemption is applied for through the Mason County Assessor’s Office, not the Treasurer, and does not happen automatically. Applicants must file paperwork and provide income documentation. Questions about qualification or how to apply can go to the Assessor’s Office at 360-427-9670, extension 491.

What Happens If You’re Late

Interest accrues on delinquent property taxes under state law. In Washington, unpaid first-half taxes accrue interest at 1% per month beginning May 1, and additional penalties compound as the tax remains unpaid. Extended delinquency can eventually place the property at risk of foreclosure, though that process plays out over multiple years and involves formal notice before any action. The Treasurer’s Office will work with property owners who contact them early; the worst outcomes almost always involve owners who do not reach out.

Why the April 30 Deadline Matters to Every Mason County Community

Property taxes fund the services that show up in every Mason County community from Shelton to Dewatto. That includes the Mason County Sheriff’s Office, county roads, district courts, public health, planning, and the county elections office that runs votes like the North Mason levy special election on April 28. A high percentage of first-half collections is what keeps those services funded through the summer months until the October 31 second-half deadline brings in the next major revenue cycle.

For a broader look at how Mason County government departments interact with each other and with residents, see our guide on how Mason County government works. Property owners weighing how the North Mason School District levy on the same election cycle affects their tax bill can also consult our coverage on what the levy means for your tax bill.

Key Contacts and Deadlines at a Glance

• First-half property tax due: Thursday, April 30, 2026
• Second-half property tax due: Saturday, October 31, 2026
• Treasurer’s Office: 411 N. 5th Street, Shelton, WA
• Treasurer general line: 360-427-9670, extension 484
• Payment plans: 360-427-9670, extension 475
• Senior/disabled exemption (Assessor): 360-427-9670, extension 491
• Automated phone payment (Point & Pay): 1-855-331-3631
• Online portal: masoncountywa.gov

Frequently Asked Questions

When is the Mason County property tax deadline in 2026?

The first-half 2026 Mason County property tax payment is due Thursday, April 30, 2026. The second-half payment is due Friday, October 31, 2026. Payments postmarked on or before the deadline are considered on time. Delinquent charges begin accruing the day after the deadline.

How do I pay my Mason County property tax online?

Mason County uses Point & Pay to process online property tax payments. Access the portal from masoncountywa.gov and select the property tax payment link. Visa, MasterCard, Discover, and American Express cards are accepted, along with E-checks. A 2.5% fee ($2.00 minimum) applies to credit card transactions. You can also pay by phone at 1-855-331-3631 using the same system.

Can I split my Mason County property tax into two payments?

Yes. Under Washington state law, any Mason County property tax bill of $50 or more can be split into two halves. The first half is due April 30 and the second half is due October 31. Bills under $50 must be paid in full by April 30. You do not need to file a special request — half-payment is the default if your bill is $50 or more.

What happens if I miss the April 30 Mason County property tax deadline?

Interest and penalties begin accruing May 1 under Washington state law. Interest is charged at 1% per month on the unpaid balance. Extended delinquency eventually places the property at risk of foreclosure, though that process takes years and involves multiple formal notices. If you cannot pay in full, contact the Treasurer’s Office at 360-427-9670 extension 475 before the deadline to discuss payment plan options.

Does Mason County have a senior property tax exemption?

Yes. Mason County participates in Washington State’s senior citizen and disabled-person property tax exemption. Owners who are 61 or older or disabled, own and occupy a primary residence in Mason County, and have an annual household income of $55,000 or less may qualify. Applications go through the Mason County Assessor’s Office at 360-427-9670 extension 491. The exemption is not automatic — you must apply and provide income documentation.

Can I set up a payment plan for Mason County property tax?

Yes. Mason County Treasurer’s Office works with property owners who cannot pay the full amount by the deadline. Payment plans are arranged case-by-case. Contact the Treasurer’s Office at 360-427-9670 extension 475 to discuss options. Interest continues to accrue during a payment plan, so reaching out before April 30 typically produces a better outcome than waiting until after the deadline.

Where is the Mason County Treasurer’s Office located?

The Mason County Treasurer’s Office is located at 411 N. 5th Street, Shelton, WA. In-person payments accept cash, check, cashier’s check, money order, and credit or debit cards. Confirm office hours at 360-427-9670 extension 484 before visiting, especially close to the April 30 deadline when lines can be long.