How Property Tax Prorations Work at Closing in Oregon

A property tax proration splits one year's tax bill between the seller and the buyer based on who owns the home for how many days. Oregon's tax year runs July 1 through June 30, so the seller covers July 1 up to closing and the buyer covers closing through June 30. Escrow does the math and shows it as a credit or a charge on each side's settlement statement. Which way the money moves depends almost entirely on what time of year you close, and right now, in early November, is the trickiest window of all.

Why Oregon's Tax Calendar Makes Prorations Unusual

In a lot of states, property taxes are paid in arrears, so the seller almost always owes the buyer at closing. Oregon works differently. The tax year starts July 1, but the bill for that year isn't certified until October. According to Lawyers Title of Oregon's Title and Escrow Overview, taxes from July 1 to mid-October are "a lien, due but not yet payable." Once the rolls are certified, they become due and payable.

That means an Oregon tax bill covers the current year, and much of it is paid in advance. A homeowner who pays in full in November is paying for July through the following June, including months that haven't happened yet. When that home sells in the spring, the seller has already paid for months the buyer will live there, so the buyer reimburses the seller.

Clackamas County's 2026 schedule shows how this plays out. According to the county's Assessment and Taxation press release dated October 14, 2026, most statements were mailed by October 25. Payment is due November 16, 2026 (November 15 lands on a Sunday this year). Pay the full amount by then and you get a 3% discount. Pay two-thirds and you get 2%. Or pay in thirds on November 16, February 16 and May 17, with no discount.

The Two Proration Scenarios

Closing between July 1 and mid-October

The new bill doesn't exist yet. Lawyers Title explains that the seller credits the buyer for the seller's share, using the prior year's tax amount as the estimate. The buyer then pays the full new bill when it arrives in the fall.

Here's a simple illustration (made-up numbers, not a real property). Say last year's bill was $5,800 and you close on August 14. The seller owned the home for 44 days of the new tax year, so escrow credits the buyer about $699. In November, the buyer pays the whole new bill.

The catch: the new bill is usually higher. In Clackamas County, total taxes imposed for 2026-27 rose 3.95%, and the county says the typical increase is 3% because of Measure 50's cap on assessed value growth. If that $5,800 bill becomes $5,974, the seller's true share of 44 days would have been about $720. The buyer absorbs the roughly $21 gap, because prorations are generally treated as final at closing. On a typical home that's small money, but it's worth knowing so the November bill isn't a surprise.

Closing between mid-October and June 30

Now the bill is out, and the direction usually flips. If the seller has already paid, the buyer reimburses the seller for the days from closing through June 30.

Another illustration with made-up numbers: a $6,000 bill, paid in full by the seller, and a closing on December 1, 2026. The seller owned the home for 153 days of the tax year and the buyer will own it for 212. The seller's share is about $2,515, so the buyer pays the seller about $3,485 at closing. That line item can surprise a buyer who budgeted only for loan costs.

If the bill is unpaid when you close (very common in late October and early November), escrow sorts out who pays the current installment and still splits the cost by days owned. Ask your escrow officer how they'll handle it, since timing around the November 16 deadline matters.

The Details That Trip People Up

The 3% discount

When a seller pays in full and takes the 3% discount, ask escrow whether the proration is figured on the full bill or the amount actually paid. Practices can differ, and on a $6,000 bill the discount is $180, so it's worth a quick question rather than an assumption.

Day counts

Escrow companies may count days slightly differently, and contracts can set the proration date at closing or at possession. If the seller is staying in the home after closing on a rent-back, read the sale agreement closely so the tax split matches who is actually living there.

Lender reserves are a separate thing

If you're financing, your lender will likely collect property taxes monthly and pay the bill for you. That's called an impound or escrow account, and it's different from the proration. Old Republic Title's Oregon homeowner manual shows how the reserve amount changes by closing month: a November closing typically means a first loan payment on January 1 and about three months of tax reserves, while a January closing shows six months. So a buyer closing this month might see a proration charge and a reserve deposit on the same statement. Neither is a fee. Both go toward your taxes.

Who gets the bill after closing

Tax statements generally go to the owner of record when the roll is certified. If you buy in late fall, the paper bill may go to the seller. Clackamas County notes that a yellow statement means a mortgage lender may be paying, and owners should check with their lender before paying. Either way, look up your account on the county site so nothing slips past a deadline.

New construction

Oregon assesses property as of January 1 each year (ORS 308.210). A home finished after that date may carry a bill for just the land, or a partially built house, for the current year. Prorating that small bill is easy. The real surprise comes the next fall, when the finished home lands on the roll. If you're buying new construction, ask the builder or escrow what the completed home is likely to be taxed at, not just what the current bill says.

What's Happening in Clackamas County Right Now

The county's 2026 figures give useful context for anyone closing this fall. Total taxes imposed reached $1,284,178,209, up from $1,235,352,377 a year earlier. Real market value grew just 1.5% for 2026, compared with 3.3% in 2025, and the county put the median single-family real market value at $594,679. That gap between slow market value growth and roughly 3% assessed value growth is Measure 50 at work. Most Oregon owners are taxed on assessed value, which is often well below market value. The county reports that only 5.7% of properties are taxed on real market value.

Financing costs matter too, since they affect how much cash buyers have left for closing. Freddie Mac's Primary Mortgage Market Survey put the 30-year fixed rate at 7.24% on October 29, 2026, compared with 6.17% a year earlier.

If you have questions about your own bill, Clackamas County is hosting a property tax virtual town hall on Wednesday, November 4, and value appeals to the Property Value Appeals Board are accepted through December 31, 2026.

What This Means for You

If you're buying

Ask for an estimated settlement statement early and find the property tax line. Closing between now and spring often means reimbursing the seller for taxes they've already paid, on top of your down payment and loan costs. Budget for it.

If you're selling

If you've already paid this year's bill, you'll likely get part of it back at closing. Keep your payment receipt handy, and tell your escrow officer whether you took the 3% discount.

If you close before November 16

Coordinate with escrow on who pays the current installment and whether the discount can still be captured. A few days of planning can keep a deadline from slipping between two owners.

For everyone

The proration is fair by design. Each side pays for the days they own the home. The confusion comes from Oregon's calendar, not the math. More local guides are on Jennifer's website.

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Jennifer Schurter serves buyers, sellers, and investors throughout South Clackamas County and the North Willamette Valley — including Canby, Oregon City, Wilsonville, Aurora, Hubbard, Molalla, Woodburn, Newberg, Sherwood, Tualatin, West Linn, Lake Oswego, and the greater Portland metro south. Her goal is simple: to be the most knowledgeable, most responsive, and most genuinely helpful real estate agent in the area — every single time. Jennifer is a licensed Oregon real estate broker with Real Broker LLC.

Ready to talk through your next move? Schedule a time with Jennifer here. No pressure, no pitch, just a real conversation.