Property-Tax Reassessment When You Buy — Reset vs No-Reset States
Updated 2026-10-25
In California, Florida, and Michigan, your property taxes reset to the new purchase price when you buy — the listing's current tax bill understates yours. In Oregon and Washington, the buyer inherits the capped value and nothing resets. That split is the single most misunderstood input in affordability math, and it changes whether a listing's "taxes: $4,200/yr" line means anything for you.
The five launch states
California
Rule: Prop 13: base-year value + max 2%/yr cap; ~1% basic rate (+ voter debt ≈ 1.1–1.25% effective)
On sale: Resets to purchase price (new base-year value) on change of ownership; a prorated supplemental bill covers the gap mid-fiscal-year. Prop 19 portability (55+/disaster, 3 uses) + $1M parent-child exclusion.
Source: boe.ca.gov + county-assessor explainers (surfaced 2026-09-25) (retrieved 2026-09-25). Statutory cites flagged for direct verification — boe.ca.gov pages were not fetched directly in the research pass.
Florida
Rule: Save Our Homes: homestead assessed value capped at 3% or CPI (whichever is lower)
On sale: Resets to full Just Value on Jan 1 after the sale. The seller can port the SOH benefit (up to $500k) to a new FL homestead within 3 tax years — Form DR-501/DR-501T by March 1.
Source: FL Dept of Revenue (pt112.pdf) · Miami-Dade PA portability (retrieved 2026-09-25).
Michigan
Rule: Proposal A: Taxable Value capped at CPI or 5% (whichever is lower); SEV ≈ 50% of market
On sale: Uncaps to State Equalized Value on Jan 1 of the year after transfer (MCL 211.27a; buyer files Form L-4260 within 45 days). Family, agricultural, and some trust transfers are exempt.
Source: Michigan Dept of Treasury — change of ownership (retrieved 2026-09-25).
Oregon
Rule: Measure 50: Maximum Assessed Value capped at 3%/yr
On sale: NO reset on sale — the buyer inherits the capped value. MAV rises only on exception events (construction, partition, rezone).
Source: Clatsop County Measure 50 · Lincoln Institute Oregon paper (retrieved 2026-09-25).
Washington
Rule: I-747 caps district levy growth at 1%/yr (not individual assessments); 100% annual revaluation
On sale: No reset on sale — properties are revalued annually regardless of ownership.
Source: WA DOR — property tax levy limit topic (retrieved 2026-09-25).
Why one blended rate per state is wrong
A single blended effective-tax-rate per state is structurally wrong for buyers in assessment-limit states. In reset states, a new buyer's effective rate is the statutory rate applied to their purchase price — California's ~0.7% blended average vs ~1.1–1.25% effective on a fresh purchase is the canonical example. In no-reset states the opposite: the buyer inherits the cap, so the blended rate overstates a new buyer's burden relative to their purchase price. The taxonomy and the lock-in effect are documented by the Lincoln Institute's Significant Features of the Property Tax.
Model your own monthly burden with the affordability calculator or weigh a purchase against your current rent with rent vs buy — and if you're on the sell side, the sell vs stay calculator prices the assessment benefit you'd give up by moving, while who pays closing costs covers the transaction lines themselves. Selling soon? The home sale capital gains & 2-of-5 rule guide covers the federal tax side of the gain.
FAQs
Do my property taxes reset when I buy a house?
In assessment-limit states, often yes. California (Prop 13), Florida (Save Our Homes), and Michigan (Proposal A) reset or uncap the taxable value on a sale — your taxes are computed on your purchase price, not the seller's decades-old assessed value. Oregon (Measure 50) and Washington are the counterexamples: you inherit the capped value, and assessments continue independently of the sale.
Why does the blended state average understate a California buyer's taxes?
California's ~0.7% blended effective rate reflects long-time owners whose assessed values are far below market. A fresh purchase resets the base year to the sale price with a ~1% basic rate (plus voter debt, ≈1.1–1.25% effective) — so a new buyer's bill is computed on the full purchase price, not the discounted assessed value.
What is the lock-in effect?
Assessment caps mean long-time owners pay taxes on an outdated (low) value while new buyers pay on today's price — the Lincoln Institute documents how this subsidizes incumbents and discourages selling, since the seller loses the accrued cap benefit. Rate lock-in (a low mortgage rate you'd lose by moving) stacks on top of tax lock-in in reset states.
Which states should buyers model differently?
Reset states: California, Florida, Michigan — model the buyer's first-year taxes from the purchase price, not the listing's current tax bill. No-reset states: Oregon, Washington — the seller's current tax history is actually informative. In reset states, the listing's current taxes will underestimate your bill; in no-reset states they won't.
Sources
- Lincoln Institute — Significant Features of the Property Tax (assessment-limit taxonomy + lock-in effect)
- Lincoln Institute — Property Tax Assessment Limits (policy focus report)
- FL Dept of Revenue — Save Our Homes / portability (Form DR-501T)
- Michigan Dept of Treasury — Property change of ownership (MCL 211.27a)
- Clatsop County, OR — Measure 50
- WA DOR — How the 1% property tax levy limit works
All sources retrieved 2026-09-25 via the sell-vs-stay facts layer and GR next-wave research. Statutory specifics (Prop 13/Prop 19, MCL 211.27a) carry an explicit verify-before-citing flag from the research pass. Not tax advice — confirm your county assessor's rules.