Travis Bunn

Founder, AppealDesk · Published March 27, 2026 · Updated August 25, 2026

Oregon's Measure 50 Caps Your Assessed Value at 3% a Year. For Many Homeowners, an Appeal Won't Touch the Tax Bill At All.

Updated August 2026

Oregon taxes real property on two different numbers, and confusing them is the single most common mistake homeowners make before they appeal. Real Market Value, or RMV, is the assessor's estimate of what your home would sell for, required to sit at 100% of that estimate under ORS 308.232. Assessed Value, the number your tax rate is actually applied against, is a different figure entirely, capped by Measure 50, the 1997 ballot measure that limits your home's Maximum Assessed Value, or MAV, to no more than a 3% increase over last year's figure, under ORS 308.146. Your actual Assessed Value is whichever is lower, RMV or MAV. In a market where prices climb faster than 3% a year, and most of Oregon has for most of the last two decades, those two numbers drift apart, and Assessed Value often ends up sitting well below Real Market Value for anyone who has owned their home more than a few years.

That gap is not a technicality. If your Assessed Value is already capped below your Real Market Value, appealing RMV downward can leave your tax bill, and your monthly escrow payment, completely unchanged, because the number the county actually taxes never moved. Your county mails the tax statement carrying all three figures no later than October 25, and you have only until December 31 to petition, a shorter and later window than most states in this series. Meanwhile your mortgage servicer runs its own clock. Under Regulation X, 12 CFR 1024.17, it analyzes your escrow account once a computation year regardless of what is happening at the assessor's office, paying whatever bill the county's roll produces, appeal pending or not.

What "Over-Assessed" Actually Means in Oregon

Every Oregon property carries three numbers on the assessment roll. Real Market Value (RMV) is the assessor's opinion of full market value, required by ORS 308.232 to sit at 100% of that estimate. Maximum Assessed Value (MAV) is a separate, statutorily controlled ceiling: under ORS 308.146, it can rise no more than to 103% of last year's Assessed Value, or 100% of last year's MAV, whichever is greater. Your actual Assessed Value (AV), the number your tax rate is multiplied against, is simply whichever of RMV or MAV is lower. MAV only resets to current market value when specific events happen: new construction or improvements, a subdivision or partition, a rezoning paired with a change in use, previously omitted property being added to the roll, or a loss of exemption. A change of ownership is not on that list. If you buy a home in Oregon, you inherit the seller's MAV trajectory, not a fresh number tied to your purchase price, which surprises buyers used to states that reset value at sale.

This is why an Oregon appeal can be pointless even when the assessor's RMV genuinely looks too high. If your AV has been sitting well below RMV for years, because MAV has been capped at 3% growth while the neighborhood's market value climbed faster, knocking RMV down in an appeal does not touch your AV at all. Your tax bill is calculated from AV, and AV was already the lower number before you filed anything. The appeal only changes what happens later, if RMV keeps falling toward MAV, or stays flat long enough for MAV's 3% creep to catch up. Appealing helps right now only when AV and RMV are close together or equal, which usually means a newer home where MAV was recently reset by new construction, a home in a market that has been flat or falling, or a property where a data error, wrong square footage, a phantom improvement, inflated RMV enough to push it below the current AV cap. Before you spend an evening building comparable sales, pull your most recent tax statement and compare the RMV and AV lines side by side. If AV is meaningfully lower than RMV, ask whether this year's appeal will do anything besides feel satisfying.

Four Levels, Starting With a Notice That Doesn't Arrive Until Fall

Oregon's appeal calendar starts later than most states covered in this series. Your assessment date is January 1, but the county does not have to mail your tax statement, carrying that year's RMV, MAV, and AV, until October 25 under ORS 311.250. From there, the ladder has four possible stops:

1. County Assessor (Informal). Contact the assessor's office as soon as your statement arrives if you spot an outright data error, wrong square footage, a bedroom that does not exist, an improvement that was demolished. There is no separate statutory deadline for this conversation, but it only helps if you still have time to escalate before December 31, so do not let an informal call eat your formal window.
2. Property Value Appeals Board (PVAB). File a written, signed petition after your statement is mailed and no later than December 31, under ORS 309.100(2). The Board, historically known as the Board of Property Tax Appeals or BOPTA before a July 1, 2024 rename, can rule on RMV, AV, MAV, or specially assessed value as of January 1, but only for value that was on the roll before December 1 of the tax year, under ORS 309.026. Sessions convene on or after the first Monday in February and must adjourn no later than April 15.
3. Magistrate Division, Oregon Tax Court. If you disagree with the PVAB's order, you have 30 days from the date of that order's notice, mailing, or delivery to file with the Magistrate Division, under ORS 305.280(4).
4. Regular Division, Oregon Tax Court. A magistrate's written decision becomes final unless you appeal it to a tax court judge within 60 days, under ORS 305.501. That appeal is heard de novo and is the sole and exclusive route to further review.

Stop at the Board and you typically have an answer by mid-April, still inside the same July-to-June tax year your statement covered. Escalate to Tax Court and there is no comparable backstop. A Magistrate Division case can run months, and a Regular Division appeal, full civil litigation with de novo review, can run past a year.

Meanwhile: The RESPA Clock

Federal law runs on its own schedule, one that has nothing to do with your county's fiscal year. Under Regulation X, 12 CFR 1024.17(c)(3), your mortgage servicer must analyze your escrow account once every twelve-month computation year set by your loan, not by Oregon's assessment calendar. That analysis pays whatever bill the treasurer sends, built off whatever is currently on the roll. Oregon's assessment year runs by calendar, January 1, but the tax year is a fiscal year running July 1 through June 30, so a roll stamped 2025 covers the tax year that started July 1, 2025 and stays the operative roll all the way through June 30, 2026, regardless of what month your appeal happens to resolve in.

If your case stays inside the Property Value Appeals Board and you get a decision by that April adjournment deadline, the correction usually reaches the county's records well before the fiscal year closes on June 30, meaning your servicer's next scheduled analysis, or an off-cycle one you request, has a real shot at catching the new number before a full extra cycle passes. If your case goes to the Magistrate Division and then the Regular Division, there is no such backstop. A Tax Court case still open the following October means your servicer has already funded at least one more full tax year at the disputed value, and your escrow account has no way of knowing a case is even pending.

A worked example (hypothetical, not a real case)

Say a homeowner in Washington County finishes building a new home and moves in that summer. Because new construction resets Maximum Assessed Value under ORS 308.146, her first tax statement shows MAV landing at almost exactly the assessor's Real Market Value, which the county set at Oregon's median, $397,000. There is no cap gap yet for MAV to hide behind. At Oregon's 0.87% effective rate, that is roughly $3,454 in annual property tax, or about $288 a month if spread evenly across an escrow payment. (Rates vary by taxing district, so treat this as illustration, not a quote.) She believes the assessor leaned on builder cost data instead of finished comparable sales, and pulls three recent sales of similar new construction nearby supporting a value closer to $360,000. She files her petition with the Property Value Appeals Board before December 31.

• Tax statement, year one: Escrow funds the full $3,454 based on the original $397,000 RMV and AV. Petition still pending.
• PVAB hearing, spring: The Board agrees the comparable sales support $360,000 and corrects both RMV and, because MAV had no cushion to fall back on yet, AV to match.
• New annual tax: $360,000 at 0.87%, or roughly $3,132, a savings of about $322 a year, or $27 a month.
• County issues corrected statement: Because the Board ruled before the fiscal year closed, the correction lands on the same tax year's roll rather than waiting for the following October.
• Escrow catches up: Only after the corrected bill reaches the servicer, at the next scheduled analysis or an off-cycle one she requests.

Compare that to a homeowner three doors down who has owned her home for eleven years. Her RMV also gets corrected downward at PVAB, by a similar percentage, but her Assessed Value had already been capped by Measure 50 for years and was sitting thousands of dollars below her old RMV before she ever filed. Her tax bill, and her escrow payment, do not move at all. Same Board, same hearing, same percentage RMV reduction, completely different outcome, because one homeowner's AV had room to fall and the other's did not.

When the Win Finally Reaches Your Escrow Account

Whichever level rules in your favor, and only when your AV actually moves, the mechanics of getting that savings into your monthly payment are federal, not Oregon-specific. The assessor updates the roll, the county issues a corrected tax statement, and none of that changes your mortgage payment until your servicer sees it. Three provisions of 12 CFR 1024.17 control what happens next:

• The surplus rule. If your next analysis shows a surplus of $50 or more, the servicer must refund it within 30 days, provided you are current on the loan (Section 1024.17(f)(2)(i) and (f)(2)(ii)).
• The cushion cap. Servicers can hold a cushion of no more than one-sixth of estimated annual disbursements, roughly two months' worth (Section 1024.17(c)(5)). A lower AV shrinks that allowed cushion too, which often makes a post-appeal refund bigger than the tax savings alone.
• The off-cycle option. A servicer is permitted, not required, to run an analysis outside its normal annual cycle (Section 1024.17(f)(1)(ii)). Send the corrected statement from the county and ask. You lose nothing by asking, and the annual analysis will pick it up regardless.

Do not assume your servicer is tracking your PVAB docket or your Tax Court case. Nobody in an escrow department is watching Oregon Tax Court filings on your behalf. The corrected statement from your county treasurer is the document that actually moves your payment, so keep a copy of the Board's order or the court's judgment alongside the revised statement, and send both the moment they arrive.

Key Counties

The highest-volume appeal jurisdictions in Oregon are Multnomah, Washington, Clackamas, Lane, and Marion counties. Multnomah County's board has used the Property Value Appeals Board name since the July 2024 rename, though some older county pages and forms elsewhere in the state still say Board of Property Tax Appeals or BOPTA, the same body under its previous name. Filing portals, forms, and local scheduling differ by county even though the statewide December 31 petition deadline and the federal escrow rules apply everywhere, so confirm procedure with your specific county's PVAB clerk before you file.

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