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Property Tax Proration Calculator for Your Website

Splits the year's taxes as of the closing date. Change the numbers and hit Calculate to see it work — on your live site it's branded to you and uses your state's exact rates.

Property Tax Proration Calculator

Splits the year's taxes as of the closing date

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About this calculator

How tax proration works at closing

Property taxes are split between buyer and seller based on the closing date. This calculator estimates each party's share so the proration on the settlement statement is right and nobody is surprised.

Proration math is a frequent source of questions — answering it instantly on your website shows partners your office has the details handled.

How is property tax prorated at closing?

The annual tax is divided across the year and allocated between seller and buyer based on the closing date. Whether the year is treated as paid in arrears or in advance depends on local convention, and the contract can override it.

What happens if the actual tax bill is not available yet?

Most closings prorate on the prior year's bill or an estimate, sometimes with a re-proration agreement so the parties settle the difference once the real bill issues.

Why do buyer and seller sometimes disagree about proration?

Almost always because of an unstated assumption — arrears versus advance, 360 versus 365 days, or which bill was used. Showing the assumption on the estimate is what prevents it.

Does it use my county's tax calendar?

Yes — we set the proration method and tax-year convention to your jurisdiction so the estimate matches your closings.

Who needs this number?

Buyers, sellers, and agents reviewing the statement — and your team, to prepare accurate prorations faster.

Who is responsible for taxes on the day of closing itself?

The contract decides, and conventions differ — some allocate the closing day to the seller, others to the buyer. On a large annual bill one day is small money, but an unstated assumption is what starts the dispute.

What if the property is sold mid-year and reassessed?

The reassessment usually takes effect the following tax year, so the proration at closing works from the current bill. The buyer should be told plainly that next year's bill may be materially higher.

Proration is where closings go wrong quietly

The convention differs by state and sometimes by county

Some jurisdictions prorate on the assumption taxes are paid in arrears, some in advance, and some use an estimated bill because the actual one has not been issued. Using the wrong assumption moves money in the wrong direction, and it is rarely caught until someone reconciles months later.

The 365-day and 360-day question

Some contracts prorate on a 365-day year, some on a banker's 360. On a large annual bill the difference is real money, and the contract usually specifies which — which means somebody has to read it.

Why it belongs on your website

Proration is the single most common source of a disputed line on a settlement statement. A calculator that shows the assumption it used — the day count, the arrears convention, the bill it worked from — prevents the argument instead of settling it.

Re-proration and the agreement nobody reads

When the real bill lands later

Where a closing prorates on an estimate, the contract often provides for re-proration once the actual bill issues. That obligation survives closing, and neither party remembers it months later unless somebody documented it clearly at the table.

Homestead and exemption changes

A property losing a homestead or senior exemption on sale can carry a substantially higher bill the following year than the prior year's figure suggests. Prorating on last year's number in that situation shortchanges the buyer, sometimes badly.

Online intake & client forms

Forms that do the back-and-forth for you

Agents, lenders, buyers and sellers submit everything online, and each submission returns to the agency as a completed PDF ready for the file — no email tag, no retyping. Branded to the agency and mobile-friendly. These six are the most used of the eleven we build.

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