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What Is a Tax Proration Credit?
When buying a home in Illinois, you may notice a line item on your Closing Disclosure or Settlement Statement called a Tax Proration Credit. This is a credit from the seller to the buyer that helps account for property taxes that have accrued but have not yet been paid at the time of closing.
In Illinois, property taxes are paid in arrears, which means homeowners pay taxes for the previous year rather than the current one. Because of this timing, there is often an unpaid tax obligation attached to the property when the home is sold.
Since the seller owned the property before closing, they are responsible for the taxes during that period. Instead of paying the county directly at closing, the seller typically provides the buyer with a credit so the buyer can pay the future tax bill when it becomes due.
Why Does a Tax Proration Credit Exist?
Property taxes are tied to the property itself, not the individual owner. When ownership transfers, the taxes must be divided fairly between the seller and the buyer based on how long each party owned the home.
The seller is responsible for taxes up to the closing date, while the buyer becomes responsible after closing. Because the actual tax bill is often unpaid at the time of the transaction, the title company estimates the seller’s share and applies it as a credit to the buyer during closing.
This helps prevent situations where the buyer would later receive a full tax bill for a period when they did not own the property.
How Is the Tax Proration Credit Calculated?
The calculation is usually based on the most recent property tax bill, the closing date, and the tax proration terms written into the purchase contract.
In Illinois, contracts commonly use a proration percentage such as 100%, 105%, or 110%. The percentage above 100% is designed to help account for potential increases in future property taxes.
For example, if the previous year’s property taxes were $6,000 and the contract calls for a 105% proration, the estimated taxes would first be adjusted upward. The seller’s portion would then be calculated based on the number of days they owned the property during the tax period.
The final credit is shown on the buyer’s closing documents and reduces the amount of cash the buyer needs to bring to closing.
Why Are Illinois Property Tax Prorations Different?
Illinois property taxes work differently than in many other states because taxes are paid one year behind. In many cases, the upcoming tax bill has not yet been issued at the time of closing.
Because the final bill is not always available, title companies and attorneys must estimate the future taxes using the most recent available information. This is one reason why contracts often include a proration percentage higher than 100%.
The goal is to make sure the buyer receives enough credit from the seller even if taxes increase after closing.
What Does the Credit Look Like at Closing?
The tax proration is typically listed as a credit to the buyer and a charge to the seller on the Closing Disclosure or ALTA Settlement Statement.
Rather than receiving cash directly, the buyer usually benefits through a reduction in the amount required to close.
Depending on the title company or attorney preparing the documents, the line item may appear under names such as:
- Tax Proration
- Seller Credit for Taxes
- County Tax Credit
Although the wording can vary, the purpose is the same: reimbursing the buyer for taxes that the seller is responsible for but have not yet been paid.
Can the Final Tax Bill Be Different?
Yes. The actual future property tax bill may end up being higher or lower than the estimate used during closing.
Changes can happen because of reassessments, exemptions, new tax rates, or other adjustments made by the county after the transaction is completed.
This is why prorations are considered estimates rather than exact figures. In some transactions, buyers and sellers may negotiate additional adjustments after closing if the final tax bill changes significantly.
Illinois Tax Proration Calculators
To help estimate tax prorations in Illinois, UnrealFi provides free calculators for both Lake County and Cook County:
These calculators can help estimate seller tax credits, buyer responsibility, daily prorations, and projected closing adjustments based on your transaction details.
Final Thoughts
Tax prorations are a standard and important part of Illinois real estate transactions. Although the calculations can seem complicated at first, the purpose is straightforward: ensuring property taxes are divided fairly between the buyer and seller.
Understanding how prorations work can help you better review your closing documents and avoid confusion about tax-related credits during the homebuying process.
If you have questions about your estimated tax credit or how the numbers were calculated, your UnrealFi loan advisor can help explain the details of your transaction and what to expect at closing.
