What Are Prorations at Closing?
Property taxes and association dues don’t pause and restart just because a home changes hands mid-billing-cycle, which is why closing day involves some quiet arithmetic dividing costs between the person leaving and the person arriving.
The short answer
Prorations at closing are adjustments that divide shared, ongoing expenses — most commonly property taxes and homeowners association dues — between the buyer and seller based on how many days of the billing period each of them actually owned the property. The seller is typically credited or charged for their share up to the closing date, and the buyer takes on the remainder, so neither party pays for time they didn’t own the home.
What costs typically get prorated
Property taxes are the most common example, since they’re usually billed annually or semiannually but ownership can change on any day of the year. HOA dues work the same way when they’re billed monthly, quarterly, or annually and a sale falls in the middle of a billing period. Depending on the transaction, other recurring costs — such as some utility charges or, less commonly, rental income if the property has tenants — can also be prorated using the same basic logic.
How the closing date drives the math
The closing date is the dividing line for every proration: costs are typically split based on the number of days each party owned the property within the relevant billing period, using either a 365-day or 360-day year depending on the convention the title company uses. If property taxes for the year have already been paid in full by the seller before closing, the buyer generally reimburses the seller for the portion covering the time after closing. If taxes haven’t been paid yet, the seller instead credits the buyer for the portion covering the time before closing, since the buyer will end up paying the full bill later.
Property taxes as the classic example
A simple illustration shows how this works without relying on any specific rate or figure. Say annual property taxes for a home are billed once a year and the sale closes partway through that period. The days before closing are attributed to the seller and the days after to the buyer, and whichever party ends up paying the full bill to the taxing authority is reimbursed by the other for their share through a credit at closing. The same logic applies whether taxes are paid directly or collected through an escrow account attached to the mortgage.
Where prorations show up on paper
Prorations appear as line-item credits and debits on the closing statement, alongside other one-time charges that make up the overall costs of closing. They aren’t fees in themselves — no money is being paid to a third party for the proration — they’re simply a fair division of a bill that doesn’t neatly align with the ownership change. HOA dues follow a similar pattern to the balance confirmed in an association’s estoppel letter, since both exist to make sure ongoing community costs are settled accurately at the moment ownership transfers.
A practical habit
Reviewing the proration section of the closing statement line by line, and asking what billing period and convention was used for each item, helps confirm the math lines up with the actual closing date. It’s a small check, but prorations are one of the more mechanical parts of closing — easy to verify once the underlying logic is clear.