In most of the United States, property taxes are paid in arrears, meaning the bill covers a period of ownership that has already passed. A smaller number of jurisdictions bill in advance, charging you now for a future period. Which one applies to you depends entirely on where the property sits, because no federal law dictates how local governments schedule their collections.
What Arrears and Advance Actually Mean
A tax paid in arrears covers time you have already spent owning the property. The assessor values the property, the county calculates the tax, and the bill arrives after the tax year has ended or is well underway. A bill you receive in 2026 that covers the 2025 tax year is an arrears bill.
A tax paid in advance covers a period that has not yet happened. The bill arrives before the ownership period it applies to, the way rent is due before you occupy the space for the month. A bill you receive in late 2025 covering the 2026 calendar year is an advance bill.
The practical difference is who holds the money. In arrears, you keep the cash longer and pay after receiving the services the tax funds. In advance, the local government gets the money first and delivers services afterward. That sounds academic until a closing table, where thousands of dollars in credits or debits swing on which system your county uses.
How to Tell Which System Applies to You
There is no uniform property tax calendar in the United States. States, counties, and municipalities each set their own assessment dates, fiscal years, billing cycles, and due dates. Some send one annual bill. Others split the year into two installments, and a handful bill quarterly. The fiscal year may run January through December, July through June, or something else entirely.
Arrears is the more common approach. Illinois, Indiana, and Florida all collect this way, with the bill for one tax year arriving and coming due sometime during the following calendar year. Indiana taxpayers, for example, pay the previous year’s assessed taxes in two installments typically due in May and November.
The advance model is less widespread but still used in parts of the country, including portions of New York and New Jersey. Quarterly billing is more common under this model, and the fiscal year often does not match the calendar year.
Some jurisdictions blur the line. A county might collect the first installment in advance and the second in arrears, or issue a mid-year bill that covers both past and future months. The only reliable way to know your schedule is to check with your county tax collector or assessor’s office directly.
Why the Timing Matters at Closing
Whether your jurisdiction collects in advance or arrears matters most when a property changes hands. The seller and buyer each own the home for part of the tax year, so the annual bill has to be split between them. This proration appears as a credit or debit on the Closing Disclosure used in most residential real estate transactions.1Consumer Financial Protection Bureau. 12 CFR 1026.38 – Content of Disclosures for Certain Mortgage Transactions
The title company or closing attorney calculates the proration based on the closing date. Two methods are common: a 365-day calendar year or a 360-day banker’s year using 30-day months. Your purchase contract usually specifies which method applies, though local custom often decides.
Proration When Taxes Are in Arrears
Under an arrears system, the seller has been living in the home without yet paying the taxes for the current period. Because the buyer will be the one holding the bill when it eventually arrives, the seller compensates the buyer at closing. The seller is debited for the taxes that accrued during their ownership, and the buyer receives a credit for the same amount.
Say a property closes on July 1 in a jurisdiction that collects in arrears on a calendar-year basis. The seller owes roughly half the year’s estimated taxes. The buyer receives that credit on the Closing Disclosure and sets it aside to pay the full annual bill when it arrives the following year. The word “estimated” matters. Because the final bill has not been issued yet, proration relies on the prior year’s taxes or the best available estimate. If the actual bill comes in higher, the buyer absorbs the difference.
Proration When Taxes Are Paid in Advance
Under an advance system, the seller has already paid for a period extending past the closing date. The buyer has to reimburse the seller for the unused portion. Here the buyer is debited and the seller receives a credit.
If the seller paid a full year’s taxes through December 31 but the property closes on July 1, the buyer owes for the remaining six months. The credit appears on the Closing Disclosure just like the arrears adjustment, but the money flows in the opposite direction.
A Warning for New Construction
Proration on a newly built home deserves special attention. The prior year’s bill was likely based on the value of unimproved land, not a finished house. Closing proration will use that artificially low figure, and your first real tax bill will be dramatically higher. Mortgage lenders estimate escrow from available data, so your escrow account will almost certainly come up short in the first year. Expect a significant payment increase when the lender catches up, sometimes doubling the escrow portion of your monthly payment.
Supplemental Tax Bills After You Buy
In some states, buying a home triggers a reassessment. If the purchase price exceeds the previous assessed value, the county may issue a supplemental tax bill covering the difference between the old and new assessments, prorated from the purchase date through the end of the fiscal year. Depending on when the purchase closes, you might receive one or two of these.
Supplemental bills catch new homeowners off guard for two reasons. First, they arrive months after closing, often without warning. Second, they are sent directly to the owner and are not covered by your mortgage escrow account, even if the lender pays your regular annual taxes. You pay them separately and on time, and the same late penalties apply if you miss the deadline.
How Escrow Handles the Timing
If you have a mortgage, your lender almost certainly collects property taxes through an escrow account bundled into your monthly payment. The lender estimates the annual bill, divides it by twelve, adds that amount to your monthly payment alongside principal, interest, and insurance, and pays the tax authority directly when the bill comes due. The mechanic works the same way whether your jurisdiction bills in advance or in arrears.2eCFR. 12 CFR 1024.17 – Escrow Accounts
Lenders insist on this arrangement because a property tax lien is placed on your home as soon as the tax is assessed, and that lien outranks the mortgage. Unpaid taxes put the lender’s collateral at risk, which is a risk lenders will not take.
The one place timing catches new buyers is the first year after purchase. If the home is reassessed at its purchase price, the resulting tax increase may not show up until the first full annual bill arrives. If the lender set up escrow based on the seller’s lower tax figure, the account will not have enough to cover the new amount. The lender pays the bill, then raises your monthly payment to cover the shortfall and rebuild reserves. Plan for that in the first 12 to 18 months of ownership, particularly if you bought a home whose assessed value had drifted well below what you paid.