Your Clackamas County property tax bill is your property’s assessed value multiplied by the combined rates of every local taxing district that serves your address, including schools, fire, library, and park districts. The Assessor sets your value each year as of January 1, the Tax Collector mails bills in the fall, and the full payment is due November 15 — with a 3 percent discount if you pay the whole thing by that date. Everything else about the bill, from why your assessment rose only 3 percent in a hot market to what happens if you fall behind, flows from Oregon’s two voter-approved constitutional tax limits.
How Your Bill Is Calculated
Two amendments to the Oregon Constitution shape every tax statement in the county. Measure 5 caps the total tax rate that can be applied to your property’s real market value: education taxes cannot exceed $5 per $1,000, and general government taxes cannot exceed $10 per $1,000. When overlapping districts push past those ceilings, each district’s rate is reduced proportionally in a process the county calls “compression,” and some districts end up collecting less than their approved rate.
Measure 50 controls how fast your taxable value can grow. It established a “maximum assessed value” for every property and limits annual increases to 3 percent, no matter what the market does. Your actual assessed value in a given year is whichever is lower: that capped maximum, or the current real market value.1Oregon State Legislature. Oregon Code 308 – Determination of Assessed Value If the market drops below your capped figure, your assessed value drops with it.
Real market value under Oregon law is what an informed buyer would pay an informed seller in a voluntary, arm’s-length transaction on January 1 of the assessment year.2Oregon State Legislature. Oregon Code 308 – Real Market Value Defined; Rules The Assessor arrives at it using comparable sales, construction costs, and income data for rental properties. Multiply the assessed value by the combined district rate for your parcel’s location and you have the tax.
When Improvements Can Push Your Assessment Past the 3 Percent Cap
The growth cap has an exception that catches homeowners off guard. New construction, additions, and major improvements get added on top of the capped amount as separate value.3Oregon Department of Revenue. Maximum Assessed Value Manual Build a garage or finish a basement, and the Assessor calculates the real market value the project added and converts it into assessed value using a ratio tied to your property’s existing figures.
Routine maintenance is excluded no matter the cost. A new roof or fresh paint will not move your assessment. A major addition that increases real market value by more than $10,000 will. Smaller projects individually under $10,000 can still trigger an adjustment if their combined value tops $25,000 across any five-year period, so phased renovations deserve some planning.3Oregon Department of Revenue. Maximum Assessed Value Manual
Payment Deadlines and the November 15 Discount
November 15 is the date to circle. Pay your entire bill by then and you get a 3 percent discount. Pay two-thirds by that date and you get a 2 percent discount. Pay only one-third and you enroll in the installment plan, with no discount but no penalty either.4Clackamas County. Property Tax Bill Payment Options On a $5,000 bill, paying in full saves $150. If November 15 lands on a weekend or holiday, the deadline shifts to the next business day.
The installment plan splits the bill into thirds. After the November payment, the second third is due February 15 and the final third May 15.5Oregon Department of Revenue. Property Tax Payment Procedure Those dates are firm.
How to Pay
The county accepts payments online, by mail, and through secure drop boxes at the Development Services Building. Online payments carry convenience fees through US Bank: $3 for an e-check, 2.49 percent for most credit cards, and $3.95 for a Visa debit card.4Clackamas County. Property Tax Bill Payment Options On a large bill, the percentage-based credit card fee adds up quickly, so an e-check is usually cheaper. If you mail payment, the postmark date controls whether you met the deadline, and the drop boxes take checks and money orders but not cash.
If your mortgage servicer pays through escrow, you still receive a copy of the statement, but it works as a notice rather than a bill you need to act on. Federal rules require your servicer to send an annual escrow statement showing what was collected and disbursed, which lets you confirm the payment went out on time.6Consumer Financial Protection Bureau. Escrow Accounts
What Late Payment Costs You
Oregon law charges interest at 1.333 percent per month on any installment not paid by its due date. That works out to 16 percent per year, and it accrues on any fraction of a month.7Oregon State Legislature. Oregon Code 311 – Due Dates; Interest on Late Payments That rate alone is enough reason to pay in full if you can.
A balance that stays delinquent for three years exposes your property to tax foreclosure. Oregon law allows the county to begin foreclosure proceedings once three years have passed from the earliest date of delinquency.8Oregon State Legislature. Oregon Code 312 – Tax Foreclosure The county sends notices well before that point, but ignoring them can cost you the property. Once foreclosure concludes, the property transfers to county ownership free of unpaid assessments and charges. If you are falling behind, contact the Tax Collector early; arrangements are easier before the file enters foreclosure.
Programs That Can Reduce or Defer What You Owe
Oregon does not have a general homestead exemption, so there is no automatic break for living in your own home. Relief is targeted at specific groups.
Senior and Disabled Deferral
If you are 62 or older, or under 62 and receiving Social Security disability benefits, you may qualify for Oregon’s property tax deferral program. The state pays your property taxes on time and records a lien against the home; you repay the accumulated balance when the property is sold or ownership changes. Interest accrues on the deferred amount at 6 percent per year.9Oregon Department of Revenue. Oregon Property Tax Deferral for Disabled and Senior Homeowners Program
To qualify, total household income for the prior calendar year cannot exceed $70,000, counting both taxable and nontaxable income for everyone living in the home.9Oregon Department of Revenue. Oregon Property Tax Deferral for Disabled and Senior Homeowners Program You must own and occupy the property, and you apply through the Oregon Department of Revenue rather than the county.
Disabled Veteran Exemption
A separate exemption reduces the assessed value of a disabled veteran’s home. Two tiers currently apply: $27,092 and $32,512, depending on the nature and documentation of the disability.10Oregon Department of Revenue. Disabled Veteran or Surviving Spouse Property Tax Exemption You need a disability rating of 40 percent or more certified by the U.S. Department of Veterans Affairs or a branch of the armed forces.11Clackamas County. Veterans Tax Exemptions Surviving spouses and registered domestic partners of qualifying veterans may also be eligible.
File the claim with the Clackamas County Assessor’s office. The standard filing deadline is April 1 before the tax year you want the exemption to apply, and you will need your DD-214 or equivalent discharge documentation along with your VA disability certification.10Oregon Department of Revenue. Disabled Veteran or Surviving Spouse Property Tax Exemption Miss April 1 and you wait a year.
Appealing Your Assessment
If you think the Assessor overvalued your property, start with an informal call to the Assessor’s office. They can explain the valuation and correct basic errors like wrong square footage or missed condition issues, often on the spot and at no cost.
If that does not resolve it, file a formal petition with the Clackamas County Property Value Appeal Board. The deadline is December 31 following receipt of your tax statement, or the next business day if that date falls on a weekend.12Clackamas County. Property Value Appeals Use Form OR-B-RPP, available from the Oregon Department of Revenue or the County Clerk’s office.13Oregon Department of Revenue. Oregon Property Value Appeals Board Real Property Petition Call the County Clerk at 503-655-8662 for filing details and any applicable fee.
The Board reviews real market value, not the tax bill itself. Bring evidence directly tied to value: recent comparable sales nearby, a professional appraisal (typically $300 to $800 for a residential property), photos of condition problems, or documentation of errors in the property record. Arguing that the tax is too high, or that your value rose faster than a neighbor’s, will not persuade the Board. If you disagree with its decision, or if you miss the December 31 filing deadline, you can appeal to the Oregon Tax Court Magistrate Division, which charges a $52 filing fee.12Clackamas County. Property Value Appeals
Business Personal Property
If you run a business in the county, you have a separate obligation. Oregon requires businesses to file a personal property return listing machinery, equipment, furniture, and other tangible assets, including items fully depreciated or in storage.14Oregon Department of Revenue. Confidential Personal Property Return The return goes to the Assessor by March 15 each year. If you do not file, the Assessor can estimate the value, and those estimates rarely favor the taxpayer. If your total assessed business value is below the annual cancellation threshold you may not receive a bill, but you still have to file the return.
Deducting Your Property Tax on Your Federal Return
You can deduct Clackamas County property taxes on your federal return if you itemize. The federal deduction for state and local taxes, known as the SALT deduction, is capped at $40,400 for the 2026 tax year ($20,200 for married filing separately). The cap covers property taxes, state income taxes, and local taxes combined, and it phases down for filers with modified adjusted gross income above $505,000, but cannot drop below a $10,000 floor. If you take the standard deduction, there is no separate benefit from your property tax payments, and because Oregon state income tax can consume a large share of the cap on its own, running the numbers both ways before filing is worth the time.