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Real Estate Tax Proration Calculator

Calculate the buyer's and seller's share of annual property tax at a real estate closing.

Result

Seller's Prorated Share
$2,942.47
Buyer's Prorated Share
$3,057.53

Assumes the seller owned the property for the portion of the year before closing and the buyer owns it from closing day forward, split proportionally by calendar days - actual proration conventions (which day counts to whom, whether taxes are paid in arrears or advance) vary by state and local custom, so always confirm the exact method your closing agent uses.

About the Property Tax Proration

This calculator splits an annual property tax bill between a buyer and seller based on the exact day a real estate closing occurs. It is built for anyone preparing for or reviewing a closing statement who wants to verify how the property tax credit or charge was divided.

How It Works

You enter the annual property tax amount and the day of the year (1 to 365) the closing takes place. The calculator converts the annual tax into a daily rate, then assigns the seller every day of ownership before closing and the buyer every day from the closing date through year end.

dailyRate = annualTax / 365; sellerShare = dailyRate x (closingDay - 1); buyerShare = dailyRate x (365 - closingDay + 1).

Formula & Methodology

Divide the annual tax bill by 365 to get a per-day rate. The seller is charged for every full day owned before the closing date, which is closingDay minus 1 days. The buyer is charged for the closing day itself plus every remaining day of the year, which is 365 minus closingDay plus 1 days. Together the two shares always add back up to the full annual tax amount.

Examples

Mid-year closing on a $6,000 tax bill

A property with a $6,000 annual tax bill closes on day 180 of the year (late June). The daily rate is about $16.44, giving the seller a share of roughly $2,942 for 179 days of ownership and the buyer a share of about $3,058 for the remaining 186 days.

Early-year closing on a $4,200 tax bill

A home with $4,200 in annual property tax closes on day 45 (mid-February). The seller's share covers 44 days at about $11.51 per day, or roughly $506, while the buyer's share covers the remaining 321 days, about $3,694.

Advantages

  • Uses the exact day-count method a title company or closing agent typically applies, making it useful for double-checking a settlement statement.
  • Shows both parties' shares side by side so the split can be quickly verified to sum to the full annual tax bill.
  • Lets a buyer or seller test different projected closing dates before a sale finalizes to see how the tax credit changes.

Common Mistakes

  • Assuming the buyer and seller split the bill 50/50 regardless of closing date, when the actual method here is proportional to calendar days owned.
  • Not accounting for whether the local jurisdiction bills property tax in arrears versus in advance, which changes whether a proration appears as a credit or a charge on the closing statement.
  • Overlooking that this calculator's fixed 365-day assumption can cause a small discrepancy from a closing agent's figures during a leap year.

Edge Cases to Watch For

  • The closing day input is clamped between 1 and 365, so values outside that range are automatically pulled back to the nearest valid day.
  • The calculator always uses a 365-day year and does not adjust for leap years, so results in a leap year will be a close approximation rather than exact.
  • It assumes the closing day itself belongs to the buyer; some local customs assign that day to the seller instead, so actual closing statements may differ by one day's worth of tax.
  • The tool assumes taxes are prorated evenly across the calendar year and does not account for whether property tax is billed and paid in arrears or in advance, which varies by state and affects who technically owes what at closing.

Common Use Cases

  • Homebuyers and sellers reviewing a draft closing disclosure or settlement statement before signing.
  • Real estate agents explaining how a property tax proration credit was calculated to a client.
  • Title and escrow professionals cross-checking a proration figure for accuracy.
Written & fact-checked by the Calculateus TeamLast updated August 5, 2026How we verify our formulas

Frequently asked questions

Why does property tax get prorated at closing instead of just being paid by whoever owns the home when the bill arrives?

Property tax bills often don't align with the exact date of a sale and may cover a period spanning both the seller's and buyer's ownership, so proration ensures each party pays only for the portion of the year they actually owned the property, regardless of exactly when the tax authority happens to send the bill or when it's due.

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Conclusion

The Real Estate Tax Proration Calculator applies a simple day-count method to divide an annual property tax bill fairly between buyer and seller at closing. Because exact proration conventions vary by state and local custom, the result should be treated as a close estimate to confirm against the actual closing statement.

References