Oregon Measure 5 and Measure 50: Why Maximum Assessed Value (MAV) Drives Your Tax Escrow — Basalt & Byline
Updated October 2026
Two Oregon homes with similar market prices can carry different property tax bills. The difference often comes from their assessed-value histories, taxing districts, and exemptions rather than their current sale prices. For mortgage budgeting, the seller's tax statement is a starting point—not a promise about every future escrow payment.
Distinguish RMV, MAV, and assessed value
Real Market Value, or RMV, estimates market value for assessment purposes. Maximum Assessed Value, or MAV, is the separate value framework established by Measure 50. Assessed value is generally the lower of RMV and MAV.
Measure 50 generally limits annual MAV growth to 3%. That limit does not mean the tax bill itself can rise only 3%, and it does not mean a sale automatically resets taxable value to the purchase price.
Major remodeling, new construction, and other qualifying changes can create exception value. The assessor applies the relevant rules rather than simply adding renovation spending dollar for dollar. Routine maintenance and qualifying improvements should not be treated as interchangeable.
| Term | Mortgage-budget relevance |
|---|---|
| RMV | Market-value measure used in assessment and compression calculations |
| MAV | Often determines the lower taxable value for established properties |
| Assessed value | Value generally used to calculate district levies |
| Exception value | Can change the normal MAV growth calculation |
Read the Oregon Department of Revenue property tax materials and check the actual county assessment record.
Understand Measure 5 compression
Measure 5 limits covered property taxes to $5 per $1,000 of RMV for education and $10 per $1,000 for general government. When covered taxes exceed the applicable category limit, compression reduces them under statutory rules.
These are separate category limits, not a universal ceiling on every charge shown on the tax statement. Certain voter-approved bonded debt falls outside those limits. Changes in RMV, levies, and compression can affect taxes even when MAV follows its normal growth pattern.
Translate the assessment into escrow
Ask your lender which annual tax figure supports the proposed payment. New construction deserves particular attention because an earlier bill may reflect land or an incomplete home rather than the completed property.
Use the monthly payment calculator to test a higher tax estimate, then review the Oregon closing and tax payment guide for payment timing. Escrow also includes homeowners insurance, so wildfire-related premium changes can increase payments independently of property taxes.
The Consumer Financial Protection Bureau explains escrow accounts and annual adjustments. Ask how any shortage would be collected before comparing the revised payment with your household budget.
Compare Current Mortgage Rates
Compare current APRs, points, fees, and estimated monthly payments from participating lenders below.
Loan Program Comparison: 2026 Benchmarks
Oregon Measure 5 and Measure 50: Why Maximum Assessed Value (MAV) Drives Your Tax Escrow — Choose a mortgage by comparing eligibility, upfront cash and total monthly costs, not the advertised rate alone. Conventional, FHA, VA and USDA serve different borrowers. Confirm county limits, taxes, insurance and lender requirements before comparing personalized Loan Estimates for your household.
Historical 2025 one-unit comparison: conforming $832,750; FHA floor $541,287. County and unit-count limits can differ.
| Loan program | Down payment / equity | 2026 one-unit baseline | Costs and page-specific comparison |
|---|---|---|---|
| Conventional | 3%–5% subject to eligibility | $832,750 | PMI generally below 20% down |
| FHA | 3.5% at 580+; 10% at 500–579 | $541,287 floor | 1.75% upfront MIP; 0.55% annual for >95% LTV, base loan ≤$726,200, term >15 years |
| VA | 0% for eligible borrowers | No VA limit with full entitlement | No monthly PMI; funding fee unless exempt |
| USDA | 0% for eligible borrowers | Income, address and repayment eligibility | Guarantee and annual fees; confirm current schedule |
| Jumbo | Lender-specific cash and reserves | Above applicable conforming limit | Lender-specific pricing and insurance |
| Home Equity / Refinance | Equity and underwriting dependent | Property and lender dependent | Compare closing costs, term and break-even |
Sources: FHFA limits; HUD FHA limits.
Editorial Methodology & Primary Sources
Verification date: Not recorded; check the primary source and lender timestamp before relying on an estimate.
Rate comparisons use participating lender feeds, not a whole-market survey or guaranteed offers. Freddie Mac PMMS is a market benchmark, not a personalized quote. Calculator models rely on published regulatory formulas and disclosed assumptions rather than fabricated first-person loan testing.
Monthly principal and interest use the amortization formula P × r / (1 − (1 + r)−n), where r is the monthly note rate and n is the number of payments; at zero interest use P / n. PITI adds monthly property taxes and homeowners insurance; PMI is separate. APR includes applicable finance charges under Regulation Z and is not the note rate used for payments. Compare lender Loan Estimates for actual APR and fees.
- Consumer Financial Protection Bureau (CFPB) — Loan Estimates, APR and borrower disclosures; Regulation Z.
- U.S. Department of Housing and Urban Development (HUD / FHA) — FHA program guidance.
- U.S. Department of Veterans Affairs (VA) — VA loan eligibility and benefits.
- Freddie Mac Primary Mortgage Market Survey (PMMS) — published rate benchmarks.
- U.S. Census state tax collections — state property tax benchmarks; confirm parcel-specific assessments and exemptions with the state revenue department and local assessor.
- Oregon Housing and Community Services — state housing finance and property tax authority.
- Oregon Department of Revenue — state housing finance and property tax authority.
The payment snapshot uses illustrative annual taxes of 1% of home price, $1,200 insurance and 0.5% PMI below 20% down, not verified local quotes. Other calculators disclose their inputs and assumptions. Published guidance and lender feeds may change independently; confirm current program rules, taxes and offers before a decision.