Oregon Const. Art. XI § 11b

Oregon Real Estate Calculators

Oregon's Measure 50 assessment system — the 3% annual MAV growth cap, RMV vs MAV mechanics, and the structural divergence between market value and the taxable base that defines Oregon property-tax math.

Anchored to: Oregon Const. Art. XI § 11b; ORS Chapter 308

1 calculator live. Reviewed against current statute and regulation. Last updated 2026-05-16.

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Oregon Constitution Article XI §§ 11

Oregon Measure 50 Property Tax Calculator

Compute an Oregon property's annual tax bill under Measure 50 (Article XI § 11 of the Oregon Constitution, ratified 1997) and ORS Chapter 308. Models the Maximum Assessed Value (MAV) frozen at 90% of 1995-96 Real Market Value with a 3% annual cap, the ORS 308.146(2) "lesser of MAV or RMV" tax basis, the $15 per $1,000 combined statutory rate cap under Article XI § 11b (Measure 5) with compression flagging, and the ORS 311.668 Senior and Disabled Property Tax Deferral (age 62+ at the $60,000 household income limit for the 2026 program year).

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Oregon Measure 50 Property Tax Calculator
Compute an Oregon property's annual tax bill under Measure 50 (Article XI § 11 of the Oregon Constitution, ratified 1997) and ORS Chapter 308. Models the Maximum Assessed Value (MAV) frozen at 90% of 1995-96 Real Market Value with a 3% annual cap, the ORS 308.146(2) "lesser of MAV or RMV" tax basis, the $15 per $1,000 combined statutory rate cap under Article XI § 11b (Measure 5) with compression flagging, and the ORS 311.668 Senior and Disabled Property Tax Deferral (age 62+ at the $60,000 household income limit for the 2026 program year).

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Every YMYL calculator is reviewed quarterly and after every legislative session in the jurisdiction it covers. Citations are link-validated monthly against the relevant statute and regulation websites. The methodology page documents the discipline.

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