If you got a property tax bill after selling your house, it almost always belongs to the buyer, not you. At closing, the annual tax was split between the two of you based on how many days each side owned the home, and the buyer received a credit to cover the portion that hadn’t been billed yet. The statement landed in your mailbox because the county assessor hadn’t updated its ownership records in time for the mailing.
Why the Bill Came to You
Property tax offices run on their own calendar. Most bill in arrears, so a statement you receive in October may cover a tax period that ended months ago, sometimes before you even sold. On top of that, county offices take time to process ownership changes. After your closing agent records the new deed, the assessor still has to receive the update and enter it in the system. That lag commonly runs 30 to 90 days, and in some counties longer.
Until the update goes through, the assessor’s records still show your name and mailing address, so the bill goes to you. It’s an administrative default, not a judgment about who owes the money.
How Proration Handled This at Closing
Proration is the calculation that split the annual tax between you and the buyer by the exact number of days each of you owned the home during the tax year. Your share covered the start of the tax year through the day before closing. The buyer’s share covered closing day through the end of the tax year.
In areas that bill in arrears, the closing agent calculated your share and deducted it from your sale proceeds as a credit to the buyer. The buyer received that credit so they’d have the money to pay the full bill when it eventually arrived. Sell on July 1, and you were credited for roughly six months of tax; the buyer took on the remaining six.
Where taxes are paid in advance, the math runs the other direction: the buyer reimburses you for taxes you prepaid covering the period after closing. Either way, the settlement happened at the closing table.
The document that records all of this is the Closing Disclosure. It has a specific line for the property tax adjustment showing the dollar amount and whether it was debited from or credited to your proceeds. If that line shows a tax credit going to the buyer, you’ve already paid your share. The buyer has both the funds and the obligation to pay the full bill when it comes due.
What to Do With the Bill
Pull out your Closing Disclosure and find the property tax adjustment line. Confirm the amount and that the credit went to the buyer. That single step answers the main question: if the credit is there, the bill isn’t yours.
Then forward the bill to the buyer. Include a copy of the relevant page from the Closing Disclosure so they can see the credit and understand the payment is theirs. Most buyers handle it without friction when the documentation is clear.
If you don’t have the buyer’s contact information, reach out to the title company or closing attorney who handled the transaction. They have the proration calculation, copies of the closing documents, and contact details for both sides. They can relay the bill or clear up any confusion about the adjustment.
Finally, call or write your local tax assessor’s office and ask them to update the mailing address on the property. Until you do this, you may keep receiving bills, delinquency notices, and other correspondence meant for the new owner. In most jurisdictions a short written or online request is all it takes.
If the Proration Looks Off
Sometimes the proration was based on an estimate because the current year’s tax rate hadn’t been set when you closed. This is common for closings early in the year. If the actual bill comes in significantly higher than the estimate, the buyer may push back. Check the purchase agreement. Some contracts include a true-up clause allowing a post-closing adjustment once the real number is known. If yours doesn’t, the estimate on the Closing Disclosure is usually the final word.
When the Bill Might Actually Be Yours
Not every post-sale bill is a routine statement that got mislabeled. Some states issue a supplemental tax bill after a property changes hands. A supplemental bill reflects a reassessment triggered by the sale itself: if the purchase price came in higher than the old assessed value, the tax office recalculates the tax on the new value and bills the difference for the remainder of the tax year.
The distinction matters. A supplemental bill is a new charge generated by the sale, not the same annual bill you’d expect. Each side is generally responsible only for the supplemental amount covering the months they owned the property. If a supplemental bill covers the buyer’s ownership period, it’s theirs. If it covers months before closing, it may genuinely be yours, and it likely wasn’t reflected in the proration because it didn’t exist yet.
Supplemental billing isn’t universal; not every state or county does it. If you receive a bill labeled “supplemental” shortly after selling, read the covered dates carefully before assuming anything.
What Happens If Nobody Pays
Ignoring a misdirected bill can create real problems, even for you. Property tax liens attach to the property, not to the person who owned it when the tax was assessed. If the buyer never pays, the lien sits on the property, accrues penalties and interest, and can eventually lead to a tax sale.
As the former owner, you generally won’t face personal liability, since the lien follows the real estate. The practical risk is that the buyer doesn’t know the bill exists because it went to your address and got tossed. Penalties grow, and the situation gets uglier. Forwarding the bill promptly protects everyone.
Tax liens no longer appear on credit reports as of 2018, so an unpaid property tax bill won’t directly hurt your credit score. But a lien is public record and could surface in background checks or future real estate transactions if, through an administrative error, it’s tied to you rather than the current owner. The cleanest move is to make sure the bill reaches the right person and the assessor’s records get corrected.
Your Old Escrow Account Is Separate Money
If you had a mortgage with an escrow account, your lender was collecting money each month to cover property taxes and insurance. When you paid off the loan at closing, any balance left in that account belongs to you.
Federal law requires your mortgage servicer to return the remaining escrow balance within 20 business days after the loan is paid in full.1Consumer Financial Protection Bureau. Timely Escrow Payments and Treatment of Escrow Account Balances The servicer must also send a short-year escrow statement within 60 days of receiving the payoff funds.2eCFR. 12 CFR 1024.17 – Escrow Accounts
This refund is not the same thing as the proration credit. The escrow balance is your money that was being held by the lender. The proration credit was an adjustment between you and the buyer at closing. Don’t assume your escrow refund covers the tax bill. It doesn’t. The buyer pays the bill using the proration credit they received.
What You Can Deduct for the Year You Sold
In the year you sell, you can only deduct the property taxes that correspond to the days you actually owned the home. The IRS calculates this by dividing your days of ownership (not counting the closing date itself) by 365, then multiplying by the total annual tax.3Internal Revenue Service. Publication 523 (2025), Selling Your Home That prorated figure is what you report on Schedule A, regardless of whether you or the buyer wrote the check to the tax office.
If you paid the entire annual bill by mistake, you still can’t deduct the buyer’s portion. The IRS treats that share as an adjustment to the home’s selling price, not as a deductible tax payment for you.3Internal Revenue Service. Publication 523 (2025), Selling Your Home Overpaying doesn’t buy you a bigger deduction; it just means you need to recover the money from the buyer.
Keep your Closing Disclosure, tax payment records, and any correspondence about the bill for at least three years after the due date of the return for the year you sold.3Internal Revenue Service. Publication 523 (2025), Selling Your Home Those documents back up your prorated deduction if the IRS asks.