Mortgage Sale Calculator
The sale price is not what you walk away with. Commissions, closing costs, transfer taxes, and your mortgage payoff all come off first, and most sellers are surprised by how much. This mortgage sale calculator shows your net proceeds from selling a mortgaged property: the full cost-to-sell breakdown, the mortgage payoff, and the cash you actually keep, including a warning if the numbers go negative.
Quick Answer
Selling for $450,000 with a $250,000 mortgage payoff leaves $167,750 in net proceeds. The cost to sell is $32,250: $22,500 commission, $4,500 closing costs, $2,250 transfer tax, and $3,000 of repairs, or 7.17% of the sale price. That 8-to-10% all-in range is what catches most sellers off guard.
- Quick Answer
- Where the sale price actually goes
- The five selling costs, line by line
- Why the payoff figure is not your statement balance
- A second example: a $320,000 sale
- When proceeds go negative
- Net proceeds are not taxable gain
- What competing sale calculators miss
- Frequently Asked Questions
- Add This Calculator to Your Website
- References
Where the sale price actually goes
The formula is plain subtraction: net proceeds = sale price − mortgage payoff − total cost to sell. The mortgage payoff is your own debt being settled, not a fee, but it still comes off the check, as National Association of Realtors seller-cost data shows. The cost to sell is where the surprises live.
Commission is almost always the largest line item, which is why it is the first thing to negotiate. After the 2024 NAR settlement, sellers are no longer required to offer buyer-agent commission through the MLS, and the whole structure is more negotiable than it used to be, per National Association of Realtors research.
The five selling costs, line by line
| Cost | Typical range | Negotiable? |
|---|---|---|
| Agent commission | 5 - 6% of price | Yes: rates and splits are fully negotiable, per National Association of Realtors research |
| Seller closing costs | 1 - 3% of price | Partly: title and escrow fees vary by provider |
| Transfer / excise tax | 0 - 2% of price | No: set by state and locality |
| Buyer concessions | 0 - 3% of price | Yes: agreed in the contract |
| Repairs, staging, prep | $0 - $10,000+ | Yes: pre-listing work is usually cheaper than credits |
All-in selling costs run 8-10% of the sale price for most transactions, according to National Association of Realtors seller-cost data.
Why the payoff figure is not your statement balance
Your monthly mortgage statement shows the balance on a past date, but the payoff at closing is a different number. Interest keeps accruing every day until the loan is actually funded off, so the payoff is the balance plus per-diem interest to the funding date, plus any unpaid fees, minus any escrow surplus held by your servicer. That is why lenders issue a written payoff statement with a good-through date: after that date the figure moves again. The mortgage per-diem calculator shows how daily interest moves the payoff figure between the statement date and closing.
Two more lines often surprise sellers. If you have a second mortgage or a home equity line of credit secured by the property, that loan must also be paid off at closing, even though this calculator has a single payoff field: add the two payoff figures together before you enter the number. And an escrow refund, if your servicer holds more than needed, usually arrives after closing rather than at the table, so do not count it as cash at closing unless your servicer confirms otherwise in writing.
A second example: a $320,000 sale
Take a smaller sale to see how the same arithmetic behaves when costs run higher. Sell for $320,000 with a $180,000 mortgage payoff, 5.5% commission, 1.5% seller closing costs, 1% transfer tax, $2,000 of buyer concessions, and $5,000 of repairs and prep:
| Line | Amount |
|---|---|
| Sale price | $320,000 |
| Agent commission (5.5%) | $17,600 |
| Seller closing costs (1.5%) | $4,800 |
| Transfer tax (1%) | $3,200 |
| Concessions + repairs | $7,000 |
| Total cost to sell | $32,600 (10.19% of price) |
| Mortgage payoff | $180,000 |
| Net proceeds | $107,400 |
At 10.19% of the sale price, this example sits just above the typical 8 to 10% all-in range, so the tool flags it as a high cost to sell. The flag is a prompt to look at the lines, not a verdict on the sale: here the driver is the combination of a full commission rate with several thousand dollars of concessions and prep on a lower-priced home, where fixed-dollar costs weigh more heavily than they do on the $450,000 example.
When proceeds go negative
If the mortgage payoff plus selling costs exceed the sale price, net proceeds are negative. This calculator shows the real negative number rather than flooring it at zero, because that figure is the cash you would have to bring to closing. Short sales, deed-in-lieu, and price renegotiation after inspection are the usual responses; talk to your lender before you are deep in the process, as the U.S. Department of Housing and Urban Development closing guidance advises.
Before you list, it also pays to know the exact payoff you will owe at closing. The mortgage payout calculator builds the settlement figure with per-diem interest to the funding date, so the payoff line in this tool is a real number, not a guess. If you are buying your next place at the same time, the mortgage payment calculator sizes the new payment, and the buying rental property calculator helps if the old home might become an investment instead of a sale.
Net proceeds are not taxable gain
Net proceeds are the cash you walk away with. Taxable gain is a different calculation: roughly, the sale price minus your adjusted basis (what you paid, plus improvements, plus selling expenses), and it is the gain, not the proceeds, that may be taxed. For a primary residence you owned and lived in for 2 of the last 5 years, the exclusion is up to $250,000 for a single filer or $500,000 for a married couple filing jointly, and the home-sale exclusion calculator works through that test. This is general information, not tax advice: confirm your own position with a tax professional before you rely on it.
What competing sale calculators miss
Most home-sale calculators bury the mortgage payoff inside "closing costs," which confuses settling your own debt with paying a fee. Others floor negative proceeds at zero, hiding the cash-to-close reality of an underwater sale. Several still quote 6% commission as fixed, ignoring that commission became fully negotiable after the 2024 NAR settlement, per National Association of Realtors research. This calculator separates payoff from costs, shows honest negative numbers, and reports the effective cost-to-sell percentage so you can compare offers and commission structures on equal footing.
Frequently Asked Questions
Typically 8-10% of the sale price all-in: 5-6% agent commission, 1-3% seller closing costs, plus transfer taxes, concessions, and prep. On a $450,000 sale that is $36,000-$45,000 before the mortgage payoff, per National Association of Realtors seller-cost data.
No, and the distinction matters. Repaying your loan settles your own debt; it reduces your net proceeds but is not a transaction fee. Track it separately, as this calculator does, and check your payoff statement for the exact figure.
After the 2024 NAR settlement, sellers are no longer required to offer buyer-agent commission through the MLS. Many still offer 2-2.5% to attract buyers, but it is fully negotiable, including zero, per National Association of Realtors research.
You are underwater: the negative net proceeds figure is the cash you would bring to closing. Options include a short sale (lender approval required), renegotiating price, or bringing cash, as the U.S. Department of Housing and Urban Development closing guidance describes.
They usually do not come out of escrow, but they reduce what you keep overall. Include them for an honest net figure; pre-listing repairs are typically cheaper than buyer credits at inspection, according to National Association of Realtors seller-cost data.
Possibly on the profit above the $250,000 (single) or $500,000 (married) exclusion for a primary residence you owned and lived in for 2 of the last 5 years. Net proceeds and taxable gain are different numbers; see IRS Publication 523 on selling your home for the exclusion rules.
Add This Calculator to Your Website
References
- National Association of Realtors. Quick Real Estate Statistics (seller costs context). Accessed October 17, 2026.
- National Association of Realtors. Research and Statistics (2024 practice changes on commissions). Accessed October 17, 2026.
- U.S. Department of Housing and Urban Development. Buying a Home (closing and payoff guidance). Accessed October 17, 2026.
- Internal Revenue Service. Topic No. 503, Deductible Taxes (state and local tax context for sellers). Accessed October 17, 2026.
- Consumer Financial Protection Bureau. What is a payoff statement? Accessed October 17, 2026.
- Freddie Mac. Primary Mortgage Market Survey (rate context for the payoff line). Accessed October 17, 2026.
- Internal Revenue Service. Publication 936: Home Mortgage Interest Deduction. Accessed October 17, 2026.
- Consumer Financial Protection Bureau. What is private mortgage insurance (PMI)? Accessed October 17, 2026.
- Board of Governors of the Federal Reserve System. Why does the Federal Reserve aim for inflation of 2 percent? Accessed October 17, 2026.
- U.S. Department of the Treasury, Fiscal Data. Average Interest Rates on U.S. Treasury Securities. Accessed October 17, 2026.