Your Property Tax Bill Is Due April 30. Here Is What It Actually Says.

The Treasurer mails these in the middle of February. Most of us put the envelope somewhere safe and think about it again at the end of April, when the number is bigger than last year and the obvious conclusion is that the county has decided our houses are worth more.

That is not what happened, and the difference is worth ten minutes of your time, particularly if you are thinking about selling.

The dates

• April 30 is the first half, or the full year if you would rather be done with it
• October 31 is the second half
• If your total for the year is under $50, the whole amount is due April 30

Miss it and interest runs from the month you go delinquent at a rate set in state law, not by the county. The Treasurer's page on interest and penalties spells that out.

What the typical bill did

The Assessor publishes these numbers every January and hardly anybody reads them. From the 2026 release, for the typical residence countywide:

• Assessed value went from $695,200 to $741,800, up 6.7%
• The tax bill went from $5,754.59 to $6,078.98, up $324.39, or 5.6%

Closer to home, in Arlington the typical residence went from $510,400 to $523,200 and the bill went from $4,427.67 to $4,559.79. That is $132 more, a 3.0% increase.

Here is the part that surprises people

The rate went down. The typical levy rate in this county fell from $8.2776 per thousand dollars of assessed value to $8.1949.

And yet the county collected $1.948 billion for 2026, up $97 million on the $1.851 billion collected in 2025. A 5.26% increase, in a year the rate dropped.

Both of those are true at once because Washington does not work the way people assume. We do not have a system where a rate is applied to your value and whatever comes out is the bill. We have a budget-based system. Each taxing district works out the dollars it is allowed to ask for, the Assessor adds up all the assessed value in that district, and the rate is what falls out of the division. The rate is the answer, not the question.

Which means a rising market does not, by itself, raise anybody's taxes. If every house in a district doubled in value overnight and the district asked for the same dollars, the rate would halve and the bills would not move.

Where the money actually goes

Every property tax dollar in Snohomish County, 2026

Almost two thirds of it is schools, split between your local district and the state school levy. Fire districts are the next largest share at 14.4%. The county's own share, the part actually run out of Everett, is 5.9%, and roads are another 4.0%.

I mention that because "my county taxes went up" is the usual phrasing and it is nearly always the wrong target. Ninety-four cents of the dollar is going somewhere other than county government.

What moved this year

Increase by type of taxing district, 2025 to 2026

Fire districts went up 17.5%, which is $41.9 million on its own. Local school districts went up 5.2%, which is $34.1 million. Between them that is just under four fifths of the entire countywide increase.

None of that arrived by accident. Voters approved seven of the eleven property tax measures on the ballot in 2025, including permanent lid lifts for the Marysville Regional Fire Authority and the North County Regional Fire Authority, EMS levies in Mukilteo and Fire District 4, and a bond for the Lake Stevens School District. Those show up on this year's statements. I spent close to eight years with Arlington Fire, so I have some idea what a fire levy pays for, but the point here is narrower than that: this increase was voted in, not assessed in.

Your assessed value is not why your bill moved

This is the one I would want a seller to take away. Every city in the county saw assessed values rise this year. What the bills did afterwards had almost nothing to do with it.

Change in the typical tax bill, 2025 to 2026

Marysville's typical residence gained 2.8% in value and its typical tax bill dropped $87.68. Granite Falls, which is not on the chart, gained 4.7% in value and its bill fell $512.90, a 12.4% cut. Edmonds gained 6.5% in value and its bill rose $1,220.45, up 18.7%.

Same county, same year, same direction on value, and the bills went in opposite directions. What separates them is which districts they sit in and what those districts asked for.

The value on this bill is fifteen months old

Here is the detail almost nobody knows. The value being taxed on your 2026 statement is the January 1, 2025 assessed value, set from sales that closed before that date. New construction gets a July 31, 2025 date.

So when you open that envelope on the 30th of April 2026, you are looking at an opinion of value formed more than fifteen months earlier, from sales older than that again.

Two things follow.

Do not price your house off it

I get asked about this most weeks. The county says my place is worth this, so should we list there? No, and not because the Assessor is bad at the job. They are valuing a very large number of properties from the outside on a single date, for a purpose that is not selling your house. They have not been inside it. They do not know you replaced the roof, and they do not know the neighbour's shop backs onto your fence line.

An assessed value and a listing price are two different instruments built for two different jobs. Use recent comparable sales for the listing price. I will pull them for your address and you do not have to list with me to get them.

You cannot appeal the bill in your hand

The window for the value on this statement closed in the summer of 2025. Which brings us to the useful part.

What you can still do

Check whether you qualify for relief

The Senior Citizens and People with Disabilities exemption is the one most people miss. For the 2026 tax year the disposable income threshold in Snohomish County is $75,000, which is higher than most people expect and includes social security. Broadly, you need to be 61 or older by December 31 of the prior year, or retired because of a disability, and you need to own and occupy the place as your principal residence for at least six months of the year.

The reduction does not have to be paid back. There are also deferral programs, an exemption for certain home improvements, and open space and forest land classifications for acreage. They are all listed on the Assessor's property tax relief page, and the exemptions division answers the phone at 425-388-3540.

Be ready for the notice that decides next year's bill

The Assessor mails Official Notices of Assessed Value in late June. That notice sets the value behind the bill you will pay in 2027, and it is the one you can do something about.

From the Board of Equalization, you have 60 calendar days from the date on the notice to file a petition, or until July 1 of the assessment year if you never received one, whichever is later. Filing is free. You keep paying your taxes on time while it is pending.

What the Board can do is narrow, and knowing that in advance saves people a wasted summer. The Assessor's value is presumed correct under state law. You have to prove two things: that the value is wrong as of the assessment date, and what it should have been instead. The standard is clear, cogent and convincing evidence.

What works:

• An error in the property record. That is the clearest win available. If they have your square footage or your acreage wrong, show it.
• A recent arm's length purchase. If you bought it near the assessment date in an ordinary sale, that is evidence. A sale between family members is not.
• Comparable sales close to January 1. Adjusted for the differences, with the work shown. The Board's own guide notes that many real estate agents will do this analysis, and I am happy to be one of them.
• Written bids for real repairs. A failing foundation or a leaking roof, priced. Carpet, fences, decks and driveways do not count; that is wear and tear.

What does not work, and this is straight from the Board:

• Other properties' assessed values, and list prices. The Board cannot use either one.
• The size of the increase. A 30% jump is not itself an argument.
• What you can afford. The Board is not permitted to weigh personal hardship.
• Complaining about the level of taxes. Wrong forum, and they will tell you so politely.

One trap in the timing: your evidence has to be with both the Board and the Assessor at least 21 business days before your hearing, and late evidence cannot be accepted. Do not sit on it waiting for a hearing date.

If your lender pays it for you

Plenty of people never see this bill at all because it is escrowed and paid out of the monthly mortgage payment. That does not mean it is not yours. A $324 increase is roughly $27 a month, and it turns up as an escrow shortage and a payment adjustment, usually with no explanation attached. If your payment moved this spring and nobody told you why, this is a good candidate. I went through how the different loan types work in 4 Common Home Loan Types Every Buyer Should Understand.

The bottom line

Pay it by the 30th. Check the relief programs, because the income threshold is higher than most people assume. Read the notice that arrives in late June rather than filing it unopened, because that is the only piece of this you get a say in, and the clock on it is 60 days.

And if you are selling this year, do not let the number on this statement anywhere near your asking price. It is a fifteen month old valuation of a house nobody looked inside, produced for a completely different purpose. Your buyers will be pricing off what sold last month.