This New $40K Tax Break Is a Big Deal for Washington Homeowners

1. A Big Tax Change Most Washington Homeowners Haven’t Planned For Yet

If you own a home in Washington, there’s a major tax change coming that could quietly affect your finances — and a lot of homeowners don’t even realize it yet.

Starting with the 2025 tax year (filed in 2026), the federal government increased the State and Local Tax (SALT) deduction cap from $10,000 to $40,000 for many households. That’s a four-times increase in how much state and local tax you may be able to deduct on your federal return.

This doesn’t mean everyone gets $40,000 back.
But it does mean the rules changed — and for Washington homeowners who pay higher property taxes, this can create real savings if planned correctly.

2. What the $40,000 SALT Deduction Actually Means

The SALT deduction allows homeowners to deduct certain state and local taxes from their federal taxable income if they itemize deductions.

These include:

• Property taxes

• State income taxes or sales taxes

• Certain local taxes

Previously, you could only deduct up to $10,000 total, even if you paid far more than that. Under the new law, the cap increases to $40,000 for eligible homeowners through 2029.

This is especially relevant in Washington, where property taxes alone often exceed the old limit.

3. Why This Matters So Much in Washington

Washington doesn’t have a state income tax — but we do have property taxes that add up quickly, especially in Pierce, King, Thurston, and Snohomish counties.

Many homeowners were already paying:

• $12,000

• $15,000

• or even $20,000+ in property taxes

Under the old rules, anything above $10,000 didn’t count for federal deductions. That’s why understanding how property taxes work — and what happens if they’re mismanaged — matters so much. If you want a deeper breakdown, this article explains it well:
👉Behind on Property Taxes in washington: what happens next and your real housing options

With the new cap, more of what you already pay may now be deductible, which can lower your taxable income and improve your overall financial picture.

4. Who Benefits Most From the New $40K Cap

You’re more likely to benefit if:

• You itemize deductions

• Your property taxes exceed $10,000

• You own a higher-value home

• You’ve owned your home for several years

• You’re planning a sale, purchase, or both

There are income phase-outs at higher income levels, so not every homeowner will qualify for the full cap — but many Washington homeowners should at least run the numbers with a tax professional.

5. Important Disclaimer (Because This Is Real Money)

This article is for educational purposes only and is not tax or legal advice.

Tax rules depend on income, filing status, and personal circumstances. A CPA or tax professional should always confirm how this applies to your situation.

That said, knowing what to ask before tax season is exactly how homeowners avoid costly surprises.

6. A Simple Example

Let’s say a Washington homeowner pays:

• $14,000 in annual property taxes

• $6,000 in other eligible state or local taxes

Old rules:
Only $10,000 deductible

New rules:
Up to $20,000 deductible — and potentially more if other SALT expenses apply

That difference alone can significantly reduce taxable income, especially when combined with mortgage interest and other itemized deductions.

7. Why Timing Matters If You’re Selling or Buying

Tax planning doesn’t live in a vacuum — it often overlaps directly with real estate decisions.

When you sell, buy, or do both at the same time, timing affects:

• How much property tax you pay that year

• Which deductions apply

• How cash flow lines up

If you’re considering selling and buying simultaneously, this guide explains the process clearly:
👉 What to Expect in a Simultaneous Closing In Washington: How Same-Day Selling & Buying Really Works

And if you’re trying to determine when selling makes the most sense financially, this breakdown is worth reading:
👉 How to time the sale of your curent home: A clear, confident guide for Washington sellers

Written by Lani Fisher — Washington State Realtor, founder of Lani Fisher Homes, and real estate professional with over 400 successful home sales specializing in relocation, military moves, and buy-sell transitions.