Prorated Property Tax at Closing Calculator

About the Prorated Property Tax at Closing Calculator

When you sell a home, property taxes are prorated between buyer and seller based on the closing date. The seller is responsible for taxes from the beginning of the tax period through the closing date, and the buyer takes over from that point forward. This proration ensures neither party pays for the other's ownership period.

The calculation seems simple — divide the annual tax by 365 and multiply by the number of days owned. But complications arise from different tax year conventions: some jurisdictions prorate based on the calendar year, others on the fiscal tax year, and some handle prepaid vs. arrears taxes differently. Most US property taxes are paid in arrears, meaning you pay for the prior period.

This calculator handles the most common scenario: prorating based on the days the seller owned the property during the current tax period. Enter your annual tax, the start of the tax period, and the closing date to see the exact seller share.

When This Page Helps

Tax proration is a standard closing item but the exact amount depends on your closing date and local tax conventions. Getting this right ensures you're not overpaying. Even a week difference in closing date changes the proration by $50–$150 for a typical property.

How to Use the Inputs

1. Enter the annual property tax amount.
2. Enter the start date of the current tax period (usually January 1 or July 1).
3. Enter the expected closing date.
4. Select whether taxes are paid in arrears or prepaid.
5. Review the seller's prorated share and the buyer's remaining share.

Example Calculation

Tips & Best Practices

• Most US property taxes are paid in arrears — meaning you pay for the prior period after it ends.
• If taxes haven't been billed yet, the proration is based on the prior year's tax amount (subject to adjustment).
• Some states use a 360-day year (12 months × 30 days) for proration; this calculator uses actual days.
• The title company handles the actual proration at closing, but verifying their math protects you.
• If you've prepaid taxes beyond the closing date, you'll receive a credit from the buyer.
• Property tax proration appears on the closing disclosure (HUD-1 replacement) under adjustments.

Understanding Tax Proration at Closing

Tax proration ensures fairness: neither buyer nor seller should pay taxes for days they didn't own the property. At closing, the title company calculates the exact split and either credits the buyer (if taxes are owed by the seller) or credits the seller (if taxes were prepaid beyond closing).

Arrears vs. Prepaid Tax Scenarios

In an arrears state, the seller typically owes a credit to the buyer at closing because taxes for the seller's ownership period haven't been paid yet. In a prepaid state, the seller may receive a credit because they've already paid taxes beyond the closing date. The closing disclosure shows the exact amounts.

Tax Proration Disputes

Disputes sometimes arise when tax bills change significantly from the prior year (reassessment, new levies). Re-proration clauses in the purchase agreement protect both parties by allowing adjustment when the actual bill arrives. Without this clause, the initial proration is final.

Frequently Asked Questions

• What does property tax proration mean?

  Proration divides the property tax bill between buyer and seller based on their respective ownership days during the tax period. The seller pays for the days they owned the property, and the buyer pays for the rest. This is calculated and applied at closing.

• Are property taxes paid in arrears or advance?

  Most US jurisdictions collect property taxes in arrears, meaning you pay for the prior period. For example, a December payment covers July–December. Some states (California, for instance) collect semi-annually with different due dates. Check your local convention.

• What if taxes haven't been billed yet?

  If the current year's tax bill isn't available, proration is typically based on the prior year's tax amount. The purchase agreement may include a re-proration clause that adjusts the amounts once the actual bill is issued.

• How does the closing date affect tax proration?

  The later in the tax period you close, the more days the seller is responsible for. Moving a closing from April 15 to May 15 adds about 30 days of tax responsibility for the seller — roughly $500 on a $6,000 annual tax bill.

• What is a 360-day vs 365-day proration?

  Some states use a 360-day year (30 days per month) for proration calculations, while others use the actual 365-day calendar. The difference is small but can amount to $20–50. Your closing attorney or title company will use your state's convention.

• Can I negotiate who pays the prorated taxes?

  The proration method is typically dictated by local custom and the purchase agreement. However, the exact closing date (which affects the split) is negotiable. In some markets, the seller pays through the day before closing; in others, through the closing date itself.