Benton County Property Tax: Rates, Deadlines, and Exemptions

Benton County property tax is calculated by multiplying your property’s taxable assessed value by the combined rates of every taxing district covering your parcel, with a bill due November 15 each year and discounts for paying early. Oregon’s constitutional limits cap how fast assessed values grow and how much districts can collect, so your bill often rises more slowly than the market. Paying on time, claiming any exemption you qualify for, and appealing a bad valuation are the three things that actually move the number.

How Your Bill Is Calculated

Every property carries two values. Real market value is what it would sell for on January 1 of the assessment year. Maximum assessed value is a separate, capped figure that can grow by no more than 3% a year under ORS 308.146.¹ Your taxable assessed value is whichever is lower. In a rising market the cap holds your bill down; in a falling one, the assessed value drops to the lower real market value.²

The county then applies the rates of every overlapping district: schools, the city of Corvallis if you’re inside its limits, fire districts, and the county itself. Oregon’s Measure 5 caps those combined rates at $5 per $1,000 of real market value for education and $10 per $1,000 for general government. If the rates would exceed those ceilings, the tax is compressed down so you never pay more than the cap allows. You can pull up your parcel’s assessed value, tax code area, and itemized district charges through the county property search at assessment.bentoncountyor.gov.³

Payment Deadlines and Discounts

Oregon splits the tax year into three installments, and paying early earns a real discount. The anchor date is November 15, shifted to the next business day when it lands on a weekend or holiday. In 2025, that pushed the deadline to November 17.⁴

Pay in full by November 15 and take a 3% discount on the entire bill.
Pay two-thirds by November 15 and the rest by February 15 for a 2% discount on the total.
Pay in three equal installments on November 15, February 15, and May 15 with no discount but no interest, as long as each installment is on time.

On a $4,000 bill, paying in full saves $120. The two-installment plan still saves $80 while easing cash flow.⁵

Miss a deadline and interest begins at 1⅓% per month (16% annualized) on the unpaid portion, starting December 15 for the first installment, February 15 for the second, and May 15 for the third.⁵ Even a partial payment by the deadline stops interest from compounding on that portion, so pay what you can when you can.

Ways to Pay

The county’s online portal takes credit card, debit card, and electronic check. Fees differ by method: credit cards and non-Visa debit cards run 2.5% of the transaction, Visa debit is a flat $3.95, and electronic checks cost $2.00 under $10,000 or $10.00 above.⁶ On a bill of any size, the credit card fee can swallow the early-payment discount, so electronic check is usually the better call.

You can also mail a check to the Benton County Tax Collector at PO Box 964, Corvallis, OR 97339, or drop payment at the tax box at 4500 SW Research Way in Corvallis. The county uses the USPS postmark date, not the arrival date, to decide whether a mailed payment is on time.⁴ Lost your statement? Look up your account by address or map and tax lot through the property search.³

Relief Programs for Seniors, Disabled Homeowners, and Veterans

Senior and Disabled Deferral

If you’re 62 or older, or you’re disabled and receive (or are eligible for) Social Security Disability benefits, Oregon will pay your property taxes on your behalf and record a lien for the amount. The household income limit for 2026 is $70,000, counting all taxable and non-taxable income for you and any spouse who lived in the home during 2025.⁷ You have to own and live in the home as your primary residence.

The deferred balance accrues interest at 6% a year and comes due when you sell, move out for non-medical reasons, transfer the home, or pass away. For a long-term homeowner on a fixed income, deferral prevents displacement, but 6% roughly doubles the balance every twelve years, so do the math before you enroll.⁸

Disabled Veteran and Surviving Spouse Exemption

Veterans with a service-connected disability of 40% or more can exempt up to $32,512 of their homestead’s assessed value under ORS 307.250. Other qualifying veterans and surviving spouses get a lower tier of up to $27,092. Both figures grow 3% a year.⁹ You must be a U.S. citizen, discharged under honorable conditions, and own and live on the property.¹⁰

Surviving spouses and registered domestic partners can also claim the exemption if they haven’t entered a new marriage or partnership. File the claim with the County Assessor and attach your DD-214 or other discharge paperwork, along with a VA disability certification if you’re claiming the higher tier.⁹

Appealing a Valuation You Believe Is Wrong

If you think the county overvalued your property, file a petition with the Benton County Clerk. Petitions go to the Property Value Appeals Board (PVAB), and there’s no filing fee. The deadline is December 31 of the tax year on your statement, extended to the next business day if that falls on a weekend or holiday.¹¹ Your petition has to be complete when you file. Incomplete ones get returned, and if you don’t fix the problems by the date on the defective petition notice, the appeal is dismissed.

Hearings run from the first Monday in February through April 15. They’re informal. No lawyer required, and you can represent yourself. If you can’t attend, the board decides on your written evidence alone, so put your best material in the petition: recent comparable sales, photos of condition issues the assessor missed, or a professional appraisal. PVAB only hears the current tax year’s values, not prior years.

If the board rules against you and you still believe the value is wrong, you have 30 days to appeal to the Oregon Tax Court. That process is formal enough that it may justify hiring help.

What Happens If You Don’t Pay

Ignoring the bill triggers a predictable sequence that ends in foreclosure. Interest at 1⅓% per month accrues on any unpaid balance after each installment deadline.⁵ Taxes still unpaid on May 16 of the following year are formally delinquent.

Once taxes have been delinquent three years, the county can begin foreclosure under ORS 312.010. The county files for judgment in circuit court and publishes the foreclosure list in a local newspaper. After the court grants judgment, a two-year redemption period opens. During that window you can reclaim the property by paying the full delinquent amount plus accrued interest and a 5% penalty. Partial payments are not accepted.¹²

If nobody redeems within those two years, the property is deeded to the county and ownership rights are extinguished. The whole arc runs about five years from first missed payment to loss of the property, but the interest and penalties stacking up each month make catch-up more expensive as you wait. If you’re struggling, call the Benton County Tax Collector before you fall behind. A payment arrangement is far easier to work out than a foreclosure.

A Note for Business Owners

If you also run a business, property tax doesn’t stop at your land and building. Oregon requires a Confidential Personal Property Return (Form OR-CPPR) each year reporting the value of taxable business assets, such as equipment, furniture, machinery, and leasehold improvements. The filing deadline is March 15, and late-filing penalties start at 5% and climb to 50% depending on how late you are.¹³ First-year business owners are the ones most often caught off guard, so put it on the calendar.

1
Oregon Public Law. Oregon Code ORS 308.146 – Determination of Maximum Assessed Value and Assessed Value
2
Oregon Department of Revenue. Real Property Assessment and Taxation
3
Benton County Assessment. Property Account Search
4
Benton County Board of Commissioners. Benton County Releases 2025 Property Tax Statements
5
Oregon Public Law. Oregon Code ORS 311.505 – Due Dates, Interest on Late Payments, Discounts on Early Payments
6
Benton County Financial Services. Pay Your Property Taxes
7
Oregon Department of Revenue. Oregon Property Tax Deferral for Disabled and Senior Homeowners Program
8
Oregon Department of Revenue. Oregon Property Tax Deferral for Disabled and Senior Homeowners
9
Oregon Department of Revenue. Disabled Veteran or Surviving Spouse Property Tax Exemption
10
Oregon Public Law. Oregon Code ORS 307.250 – Property of Veterans or Surviving Spouses
11
Oregon Department of Revenue. Oregon Property Value Appeals Board Real Property Petition Instructions
12
Oregon State Legislature. Oregon Revised Statutes Chapter 312 – Foreclosure of Tax Liens on Real Property – Section 312.120
13
Oregon Department of Revenue. Confidential Personal Property Return