How King County Senior Citizens Can Reduce Their Property Taxes

Property values across King County have climbed for years—great news if you’re building equity, but a real problem if you’re a senior on a fixed income watching your tax bill climb right along with them. Every year, longtime homeowners get priced out of the houses they’ve lived in for decades, not because they can’t afford the mortgage, but because they can’t keep up with rising property taxes.

The good news: Washington State has a program specifically designed to help. If you’re 61 or older and meet the income requirements, you may be able to significantly reduce—or even eliminate—a portion of your King County property taxes. Here’s how it works, what’s changing soon, and how to apply.

What Is the Senior Property Tax Exemption?

The Senior Citizen and Disabled Persons Property Tax Exemption is a State of Washington program, administered by your county assessor, that reduces the taxable value of your home. Depending on your income level, it can lower your property tax bill by 30% to 90%. It works by freezing the assessed value of your home in the year you’re approved—so even as market values in your neighborhood keep climbing, you’re taxed on the frozen (lower) value instead.

Note: the figures above are specific to King County. Every Washington county administers this program locally, and income thresholds vary—Snohomish County’s limit, for example, is different from King County’s. If your home isn’t in King County, check with your local county assessor’s office for the exact income requirements and application process where you live.

Exemption vs. Deferral: Two Different Programs

Washington actually offers two related programs, and it’s worth knowing the difference before you apply:

• Exemption: Reduces or eliminates a portion of what you owe. You pay less—or nothing—on the exempted portion, permanently, for as long as you remain eligible.
• Deferral: Lets you postpone payment of your property taxes to a later date. This doesn’t reduce what you owe—it delays it, and the deferred amount plus interest becomes a lien on your property until it’s repaid.

For most seniors, the exemption is the better first option to explore, since it’s a true reduction rather than a debt against the home. Deferral may still make sense as a backstop if you don’t qualify for the full exemption you need, but go in aware that it places a lien on the property.

Big Changes Are Coming: SB 6162

Governor Ferguson signed Senate Bill 6162 on March 23, 2026—the most significant overhaul of this program in years. Starting with the 2027 tax year, King County’s income thresholds rise substantially, and the program moves to a three-tier structure instead of a single cutoff:

In plain terms: if you’re currently over the $84,000 limit and assumed you didn’t qualify, it’s worth checking again—you may fall well within the new range starting in 2027.

A few other details worth knowing:

• You likely don’t need to reapply. If you’re already enrolled, the county will generally move you to the appropriate new tier automatically in 2027.
• Renting out part of your home? If you have income from a non-short-term rental on your property (an ADU, for example), up to $6,000 of that income can be deducted if you itemize instead of taking the standard deduction.
• Veterans receiving Combined Service Retirement Compensation (CRSC) are an exception to the auto-upgrade—the county can’t verify that income change automatically, so you’ll need to file a status change notice if your income shifts.

Note: these 2027–2029 thresholds are published by the Department of Revenue but aren’t finalized until August 1, 2026—income data changes before that date could still adjust the numbers slightly. We’ll confirm and update this post once they’re locked in.

How to Apply

1. Apply online through the King County Assessor’s website, or download a paper application if you prefer.
2. There’s no specific application deadline—you can apply anytime, for the current year and up to three prior years.
3. If approved, you’ll stay in the program until a renewal is required (typically every 6 years), at which point the Assessor’s office will mail you a renewal notice.
4. Questions? The King County Assessor’s exemptions team can be reached at 206-296-3920.

What About a Reverse Mortgage?

Some seniors use a reverse mortgage alongside—or instead of—the property tax exemption, particularly if property taxes are only part of a larger cash flow challenge. Reverse mortgages (HECMs) are available to homeowners 62 and older and allow you to access home equity without a monthly mortgage payment. It’s a different tool solving a related problem, and the two aren’t mutually exclusive.

Property taxes are just one piece of retirement financial planning—your mortgage and home equity more broadly can play a role too, whether that’s restructuring debt, freeing up monthly cash flow, or building flexibility for the years ahead.

Read: Your Mortgage and Home Equity Should Be Part of Your Financial Planning

Read: HELOC Options for Seniors in Washington

Read: Retirement Mortgage Strategies for Washington State Homeowners

The Bottom Line

If you’re a King County homeowner 61 or older living on a fixed income, this program exists specifically so rising property values don’t force you out of the home you’ve worked to keep. It’s also underused—many eligible seniors never apply simply because they don’t know it’s available. With SB 6162 expanding eligibility even further starting in 2027, it’s worth checking your situation now, and again once the new thresholds are finalized in August.

If you’d like to talk through your options—whether that’s the exemption, a deferral, a reverse mortgage, or some combination—I’m happy to help you sort through it. Schedule a free consultation.