How to calculate closing date prorations in Utah

6 min read

Published June 4, 2026 • By DocketMath Team

Under review

missing_or_unverified_packet

This article is for informational purposes only and does not constitute legal advice. Laws change frequently — verify all citations with current official sources.

Quick takeaways

In Utah, closing date prorations for property tax follow Utah Code § 59-2-1317, including the day-of-closing default that the seller pays through the day of settlement.
In DocketMath, the Closing Date Prorations calculator converts a settlement (closing) date into a prorated buyer/seller split using a day-based fraction.
Use a calendar-year proration basis: 01-01 to 12-31.
For special assessments, prorate by agreement—so coordinate with your purchase agreement terms rather than assuming the same split as general property tax.
Note: This is a practical math workflow, not legal advice.

Inputs you need

To calculate closing date prorations in Utah in DocketMath (US-UT), gather these inputs first. The calculator uses them to compute buyer/seller allocations.

Core inputs (required)

Settlement (closing) date (the day you want prorations to split)
Total property tax amount for the relevant tax year (the amount you’re prorating)
Property tax year basis: calendar year
Property tax year start: 01-01
Property tax year end: 12-31

Allocation rule input (default)

Who pays through the day of settlement?
Default (Utah / UAR REPC seller pays through day of settlement): seller

Special assessments (contract-driven)

Special assessments proration approach: by agreement
- If your purchase agreement specifies how to prorate special assessments, use that agreed method.
- If the agreement directs a different approach than general tax proration, follow the agreement for special assessments.

Interest-related settings (only if your workflow requires it)

If your workflow includes interest/related calculations, the verified facts packet includes these settings:

Interest rate: 6
Receipts limitation period: see statute (the statute governs limitation behavior; configure according to the provided rules in your workflow)

How the calculation works

DocketMath applies a day-based proration model to split a tax amount between buyer and seller based on the settlement date, while applying Utah’s day-of-closing allocation rule.

Step 1: Identify the proration period (calendar year)

Because the property tax year in this workflow is defined as calendar:

Period start: 01-01
Period end: 12-31

This sets the denominator for the fraction—your “full year” of days is the calendar year.

Step 2: Compute the buyer/seller day split (day-of-closing allocation)

Utah’s default rule used in this workflow is:

Seller pays through the day of settlement

In practical terms for a day-based proration:

Seller is allocated the portion of the tax year up to and including the settlement date (through the day of settlement).
Buyer is allocated the portion after the settlement date.

So the settlement day is treated as a seller day under the verified default.

Step 3: Apply the fraction to the total tax amount

Once DocketMath has:

the total property tax amount you entered for the modeled tax year, and
the seller vs. buyer day fractions derived from the settlement date,

it calculates:

Seller’s prorated property tax = (seller-day fraction × total tax)
Buyer’s prorated property tax = (buyer-day fraction × total tax)

Step 4: Place prorations into your closing entries (optional workflow)

Depending on your closing workflow, you may:

record the computed amounts as credits/debits in your settlement statement, or
use the prorated totals directly in your prorations section.

DocketMath’s output is intended to give you the prorated amounts to plug into your settlement math.

Special assessments: apply the agreement, not the same “default” logic

The verified facts packet flags:

special_assessments_prorate: by_agreement

That means you should not assume special assessments always follow the same day split as general property tax. Instead:

If the purchase agreement says special assessments start/stop on a particular date or uses a different method, follow that instruction.
If the agreement is silent, use your agreement-driven process to determine the agreed handling—then align DocketMath’s treatment of special assessments with that method.

Common pitfalls

Pitfall 1: Using a non-calendar-year proration basis

If you accidentally model the prorations using a non-01-01 to 12-31 period, you change the denominator and shift both buyer and seller amounts.

Pitfall 2: Reversing who pays “through the day of settlement”

The default in this workflow is explicit:

seller pays through day of settlement

If you instead treat the settlement date as a buyer day, you can be off by approximately 1 day of tax allocation, which becomes noticeable on larger tax totals.

Pitfall 3: Treating special assessments like general property tax

Because special assessments are by agreement, using the same “day split” logic as general property tax can create a mismatch with the parties’ agreed treatment.

Pitfall 4: Entering the wrong “total property tax” amount

The calculator prorates the total you input. Make sure the amount matches:

the calendar tax year basis, and
the amount your settlement statement assumptions intend to prorate.

Pitfall 5: Skipping interest/limitation settings when your workflow needs them

If your process extends beyond simple prorations (for example, into interest/limitation logic), using the wrong setting—or skipping the provided statutory behavior—can distort results. Use the verified settings in your workflow when applicable.

Sources and references

Utah Code § 59-2-1317 (primary citation used for Utah’s closing-date proration approach referenced in this guide)
https://propertytax.utah.gov/
Utah Code § 15-1-2 (listed in allowed source URLs for the statutory framework; referenced only as available in the allowed source list)
https://le.utah.gov/xcode/Title15/Chapter1/15-1-S2.html
Utah Code § 15-1-3 (listed in allowed source URLs for the statutory framework; referenced only as available in the allowed source list)
https://le.utah.gov/xcode/Title15/Chapter1/15-1-S3.html

Next steps

Open DocketMath’s Closing Date Prorations tool: /tools/closing-date-prorations
Enter your settlement (closing) date.
Enter the total property tax amount for the calendar tax year you’re prorating.
Confirm the proration period is 01-01 through 12-31.
Keep the default allocation unless your purchase agreement changes it:
- seller pays through the day of settlement
If your charge set includes special assessments, verify the purchase agreement method and ensure DocketMath reflects by agreement handling for those items.
Review the prorated outputs and reconcile them to your settlement statement line items (especially the settlement-day allocation and any special assessments handling).