What Washington’s New “Millionaires Tax” Means for Tech Buyers (Yes, It’s About Your RSUs)

What Washington’s New “Millionaires Tax” Means for Tech Buyers

Washington’s new “Millionaires Tax” has officially been signed into law by the governor—a move that’s already getting attention, especially among high-income earners.

Before you panic right away—it’s not immediate. The tax isn’t set to take effect until January 1, 2028. And even that timeline isn’t certain, as it’s already facing court challenges over whether it aligns with the state constitution.

(Yes, It’s About Your RSUs)

You’ve been thinking about upgrading. Not casually—strategically. Watching the market, saving (in a very tech-adjacent way), waiting for the right moment when lifestyle and liquidity finally align. Maybe it’s that beautiful Kirkland home—great light, great kitchen, the one that makes you feel like you might finally host Thanksgiving (you won’t, but it’s nice to have the option). The kind of house that quietly signals, “Yes, we’ve arrived… but in a very understated, Pacific Northwest way.”

And you’ve timed it perfectly. A big RSU vest is coming. This is your moment—very Seattle. Not lottery-ticket wealth, not sudden windfall—just a well-earned, slightly spreadsheeted, equity-driven step forward. The plan is clean. Predictable. Responsible, even.

Historically, the equation looked like this:
RSU vest → cash → strong offer → keys

Simple. Elegant. Almost suspiciously efficient.

Now there’s a small update:
RSU vest → federal tax → payroll tax → state tax → …pause… “Wait, how much is left?”

Welcome to the new math.

Before the state ever gets involved, there’s already a very familiar line item doing most of the work: federal income tax.

RSUs aren’t special in the eyes of the IRS. When they vest, they’re treated as ordinary income—the same as your salary. Which means they’re taxed at the top marginal brackets immediately.

Let’s walk through a very familiar scenario:

Income breakdown:

Salary: $250,000
RSUs vesting: $1,500,000
Total income: $1,750,000

Federal tax reality (approximate):

Top marginal rate: 37%
Effective blended rate: ~32%–35%

Estimated federal tax → ~$550,000–$600,000

Before anything else happens… more than half a million dollars is already gone.

And because RSUs are wages, they also trigger payroll taxes:

Social Security (capped)
Medicare (1.45% + additional 0.9% over $200K)

Estimated payroll taxes → ~$25,000–$35,000

Only after that does the state step in.

The state doesn’t look at what you have left—it looks at what you made.
Which means federal taxes don’t reduce the number Washington uses. Different systems, same income, separate calculations.

For years, Washington’s value proposition was beautifully simple: make a lot of money… and the state would politely look the other way, maybe nodding in quiet approval. It was efficient. It was elegant. It was, frankly, a little too good to question.

Enter the new “Millionaires Tax,” which reintroduces something the state had previously been very chill about: math. Not your math—its math. It doesn’t care if you feel like a millionaire. It doesn’t care if it was a one-time event, a fluke, or just excellent timing with your vesting schedule. It simply looks at your income for the year and says, “Thanks for sharing!”

And for most buyers, that moment of recognition tends to show up right on schedule—often in the same window as RSUs.

Let’s walk through that same scenario again, now with the state layered in:

State tax calculation:

First $1,000,000 → exempt
Remaining $750,000 → taxed at 9.9%

Estimated tax → ~$74,000

Not spread out. Not eased in. Just… a clean subtraction from your enthusiasm.

Now let’s add a spouse, because this is a team sport:

Household income:

Your income: $1,750,000
Spouse income: $250,000
Total: $2,000,000

Updated state tax calculation:

First $1,000,000 → exempt
Remaining $1,000,000 → taxed at 9.9%

Estimated tax → ~$99,000

Same RSUs. Same house. Slightly different emotional experience.

Now stack it the way it actually shows up:

$1,500,000 RSU vest →
– ~$575,000 federal tax
– ~$30,000 payroll taxes
– ~$74K–$99K state tax
= …a more thoughtful version of confidence

Which leaves something closer to ~$800K–$820K.

Or put differently:

What used to feel like $1.5M of buying power starts to look a lot more like… about half that.

Of course, RSUs have always had a personality trait worth noting: they don’t wait for you to be ready. They’re taxed as ordinary income when they vest—not when you sell, not when you plan, not when it feels convenient. So even if your shares are still sitting there, quietly existing, the tax bill has already RSVP’d “yes.” Only after that do they behave like investments.

Which brings you back to that Kirkland house. It’s still perfect. But now the conversation sounds a little different.

Before:
“Let’s go for it.”

Now:
“Let’s go for it… after we subtract everything the government would also like to enjoy.”

This isn’t nothing—it’s a meaningful change in the equation. There’s $74K–$99K less cash available before you even start thinking about a down payment. More shares need to be sold just to cover taxes. Timing suddenly matters more—when RSUs vest versus when you want to buy. And that once-casual “let’s just go $150K over asking” starts to feel… worth a second thought. Meanwhile, lenders are still doing what they do—politely questioning stock-based income.

So the real question becomes: what does that do to the market—and what does it do to you? Does it make buyers just a little more cautious? A little less aggressive? Does it slow down how quickly people move from “we could” to “we will”? And more personally—does it change your plan? Does it shift your timing, your price point, or how far you’re willing to stretch for that next home?

It may not remove demand—but it could change how that demand shows up. What it likely introduces is hesitation. And in real estate, even small pauses—when repeated across enough buyers—can start to look like a shift. The reality is, we don’t fully know the effect yet. But we do know this: when the math changes, behavior tends to follow.

And if nothing else, it means one thing: your next home search may involve just a little less “let’s wing it”… and a little more “let’s open Excel.”

Obligatory Disclaimer: This isn’t financial or tax advice—just a reflection on how the numbers tend to behave. For actual answers, your CPA or Tax Advisor is still the main character.