Property tax reassessment after you buy

Why a sale matters

States handle sales in different ways:

• Reassessment on sale. Some states reset the value to market value when ownership changes. A long-time owner's low value disappears, and the new value often reflects the purchase price.
• Caps that end on sale. Some states limit how fast a homeowner's assessed value can rise but end the cap when the home sells.
• Regular schedules. Other places reassess every year or on a set cycle regardless of sales, so the sale itself has less direct effect, though a higher sale price can influence nearby values.

Exemptions tied to the owner, such as a homestead exemption or a senior or veteran exemption, generally do not transfer to you. You must apply for any you qualify for.

California

Under Proposition 13, California's Board of Equalization explains that property is reassessed to its market value as of the date of a change in ownership. Because the regular annual bill is already set, the county issues a supplemental assessment for the difference between the old and new values. The BOE says the supplemental bill is prorated from the first day of the month after the change in ownership to the end of the fiscal year on June 30. A purchase between June 1 and December 31 produces one supplemental bill; a purchase between January 1 and May 31 produces two.

Watch your mail. The BOE says lenders do not receive supplemental bills even when they pay your annual bill from escrow; the bills go directly to the owner, and a mix-up with your lender is not accepted as a reason to excuse late penalties. Pay the bill or contact your lender about who will pay it. The BOE's sample notice explains that you may file an appeal within 60 days of the mailing in counties that use that deadline, and that you may need to file an exemption claim quickly to have it apply to the supplemental bill.

Florida

Florida's Save Our Homes limitation caps annual increases in the assessed value of homestead property. Florida's Department of Revenue explains that after a change of ownership, the property is assessed at just value as of the following January 1, so the seller's capped value does not carry over. As a new owner you can apply for your own homestead exemption, generally by March 1. If you are moving from another Florida homestead, portability may let you transfer part of your prior Save Our Homes benefit if you establish a new homestead within three years of leaving the old one.

Texas

Texas appraisal districts appraise property each year. The Comptroller explains that if the district appraises your property at a higher value than the prior year, it must send a notice of appraised value by May 1, or April 1 for a residence homestead, or as soon as practical afterward. You can protest to the appraisal review board, generally by May 15 or 30 days after the notice, whichever is later, and may request an informal conference first. If you disagree with the board's decision, the Comptroller lists further appeal options, including district court, the State Office of Administrative Hearings and binding arbitration.

Estimating your bill before you buy

Ask the county or appraisal district how a sale affects value. Then estimate using your expected price and the combined local tax rate.

Ask your lender to base escrow on your estimate rather than the seller's bill. If the lender uses the seller's lower bill, your escrow account may come up short after the new bill arrives, which can raise your monthly payment.

If the value looks wrong

Every assessment notice explains how to appeal. Common grounds include a value above what similar homes sold for, errors in the property record such as square footage, or a missing exemption. Deadlines are short and strict, so note them as soon as a notice arrives.

The tax side

If you itemize, property tax you pay, including through escrow, counts toward the federal deduction for state and local taxes. IRS Publication 530 covers what qualifies. For 2026 figures, see our property tax basics guide.

The bottom line

The seller's tax bill reflects the seller's history. In states such as California and Florida, a sale resets the value, and exemptions and caps do not transfer. Ask how your county treats a sale, estimate the bill using your price, have your lender escrow for it, apply for your own exemptions and appeal on time if the value is wrong.