The Math of Closing: A Guide to Prorations, Credits, and Prepaids

Buying or selling a home eventually leads to a single, high-stakes moment: the arrival of the Settlement Statement.

In most transactions, you will not just see one form; you will likely review two different documents that show the same final numbers organized in two different ways. These are the Closing Disclosure (CD) and the ALTA Settlement Statement. Together, they serve as the final accounting of your real estate transaction.

These settlement statements are multi-page ledgers where every penny is accounted for, and they can be incredibly intimidating. Most people look straight at the amount they need to pay or the size of the check they will receive and simply hope the math is right.

Our goal is to move you from hope to certainty. You should not have to rely on a “trust me” from the Title officer or a lender. This guide breaks down the objective logic of closing statement math, specifically focusing on the three main categories: Prorations, credits, and prepaids.

By understanding the simple arithmetic behind these terms, you can audit your own paperwork, spot errors before they cost you money, and arrive at the closing table with total confidence.

• Format: It uses a rigid, lettered format (Sections A through J).

• Focus: It emphasizes loan costs, interest rates, and the buyer’s final “Cash to Close.”

• Location of Data: On a CD, the math we discuss in this article is usually found in Section F (Prepaids), Section G (Initial Escrow), and Sections K & L (Adjustments and Credits).

• Format: It features a side-by-side layout with a “Buyer” column and a “Seller” column.

• Focus: It shows exactly who is paying what, and how those funds are being distributed to third parties like the city tax office, the HOA, or the previous mortgage lender.

• Location of Data: Look for the “Prorations/Adjustments” section in the middle of the page to see the itemized breakdown of shared costs and credits.

• Debits: These are “charges.” For a buyer, a debit increases the amount of money you must bring to the table. For a seller, a debit reduces the amount of your final profit check.

• Credits: These are “deposits” or “payments already made.” For a buyer, a credit reduces the cash you need to bring. For a seller, a credit increases your final take-home amount.

• The Standard Rule: In most states, the day of closing belongs to the buyer. This means the buyer is responsible for the costs of the home starting at 12:00 AM on the day they sign.

• The Seller’s Cutoff: The seller is responsible for all expenses up until 11:59 PM the night before the closing date.

• Per Diem Math: All prorations are based on a “per diem” (daily) rate. You find this by taking the total bill and dividing it by the number of days in that billing cycle (usually 365 days for a yearly tax bill).

• Taxes in Arrears: If taxes are paid at the end of the year, the seller will give the buyer a credit for the days they lived in the home but had not yet been billed for.

• Pre-paid Taxes: If the seller already paid the full year’s tax bill in advance, the buyer will reimburse the seller for the days remaining in the year.

• The Formula: (Annual Tax Bill ÷ 365) × Days of Ownership = The Final Proration.

• Monthly Cycles: If a seller pays a $300 HOA fee on the 1st but closes on the 10th, they are entitled to a credit for the remaining days of that month.

• Special Assessments: If there is a one-time charge for a major project (like a new roof), the contract usually dictates whether the buyer or seller pays the full amount or if it is split based on the closing date.

• Lienable Utilities: In many areas, water, sewer, and trash bills can become a Lien against the property if unpaid. To protect the buyer, the title company may request a final reading and ensure the seller’s final balance is paid out of their proceeds at closing.

• Fuel Tanks: If the home uses propane or heating oil, the seller “sells” the remaining fuel in the tank to the buyer. A fuel company provides a reading of the tank level on the day of closing, and the buyer reimburses the seller at current market prices.

• Current Month’s Rent: If the tenant paid $2,000 in rent on the 1st and you close on the 20th, the seller owes you the rent for the final 10 or 11 days of the month.

• Security Deposits: Since the security deposit is the tenant’s money (held in trust), the entire amount must be transferred from the seller to the buyer. This usually appears as a straight credit to the buyer.

• The Logic: Rather than the seller fixing a broken HVAC unit, they “credit” the buyer the cost of the repair.

• The Math: The amount is listed as a debit to the seller (reducing their proceeds) and a corresponding credit to the buyer (reducing their cash to close).

• Lender Limits: Note that most lenders have a “ceiling” on how much a seller can credit a buyer. If the credit exceeds the buyer’s actual closing costs, the buyer may not be able to use the full amount.

• Payment Verification: Because this money is already sitting in an escrow account, it appears as a credit to the buyer to offset the purchase price.

• Common Error: Always double-check that the EMD amount on the statement matches the exact amount you wired to the escrow company weeks prior.

• The Hand-off: The seller credits the buyer for their share of the unpaid tax bill.

• The Buyer’s Duty: When the actual tax bill comes due later in the year, the buyer is responsible for paying the full amount, using the credit they received at closing to cover the seller’s portion.

• The Trade-off: This is frequently called a “no-closing-cost” loan. The lender pays some or all of the upfront fees, which appears as a credit to the buyer on the CD and ALTA.

• Math Check: Ensure that the specific dollar amount promised in your “Lock-In” agreement matches the credit shown in Section J of your Closing Disclosure.

• Homeowners Insurance: Lenders require you to pay a full 12-month premium upfront at closing (found in Section F of the CD). This ensures the home is protected for the entire first year before your monthly payments even begin.

• The Escrow “Cushion”: Lenders are governed by RESPA (the Real Estate Settlement Procedures Act), a federal law that protects consumers from being overcharged. RESPA allows lenders to collect a “cushion” of up to 1/6 (two months) of your annual property taxes and insurance. This creates a safety net so that if taxes go up next year, your escrow account doesn’t drop into the negative.

• Prepaid Interest: Mortgage interest is paid in arrears. If you close on the 15th, you must pay interest for the remaining 15 days of that month at the closing table. This is why your first “real” mortgage payment usually skips a full month — you’ve already paid the interest for the partial month of closing.

• Escrow Balance Refund: Your current lender is holding your old escrow money. Because that lender is a third party, that money doesn’t appear on the ALTA statement. Instead, the lender will mail you a check for your remaining balance approximately 30 days after they receive the payoff funds from the title company.

• Homeowners Insurance Refund: Your insurance policy doesn’t “transfer” to the buyer. You must manually cancel your policy the day after closing. The insurance company will then mail you a pro-rated refund check directly for any “unused” days you already paid for.

• Zero Tolerance Items: Fees paid to the lender (like origination fees) or to a service provider the lender picked (like the Appraisal) cannot increase at all. If they do, the lender must usually provide a credit to fix the difference.

• 10% Tolerance Items: Fees for services you were allowed to shop for (like the title company) can increase by up to 10% in total.

• The Comparison: Place page 1 of your LE next to page 1 of your CD. If you see a significant jump in “Total Closing Costs” that wasn’t explained by a change in your loan terms, ask for a “Tolerance Cure.”

• The “Double-Paid” Tax Bill: If you just paid your property taxes last week, but the statement shows a “Seller Debit” for those same taxes, you are being double-charged. Ensure the title company has the most recent receipt from the county.

• Missing Repair Credits: Check the “Credits” section of the buyer’s column for any repair concessions negotiated during the inspection. If you agreed to a $2,000 credit for a leaky roof, ensure it appears as a $2,000 debit to the seller and a $2,000 credit to the buyer.

• The Administrative “Junk Fee”: Sometimes you will see an “Admin Fee” or “Processing Fee” from a real estate brokerage. Review your original listing agreement or buyer’s agency agreement to see if you actually agreed to this fee. If not, challenge it.

• EMD Omissions: This is the most common clerical error. Ensure your Earnest Money Deposit is listed as a credit. If it’s missing, your “Cash to Close” will be thousands of dollars higher than it should be.

The settlement statement is the final scorecard of your real estate transaction. While it can look like an impenetrable wall of numbers, it is actually governed by simple arithmetic and strict federal regulations.

• Who Holds the Earnest Money Deposit? How Escrow Protects Both Buyer and Seller – See how funds are safeguarded before closing and how they flow into credits on the final statement.

• Closing Costs Guide for Home Buyers – A line-by-line breakdown of buyer expenses that show up alongside prorations and prepaids.

• Closing Costs Guide for Home Sellers – Understand how seller debits, credits, and payoff items affect the final proceeds check.

• Time Is of the Essence: A Guide to Contractual Deadlines – Learn why timing drives proration math and how missing deadlines can change who pays what.

• The Home Buying and Selling Process – Zoom out to see where the settlement statement fits in the full transaction timeline, from offer Acceptance to Recording.