π Mortgage Prepayment Penalty Calculator
What it costs to pay off or refinance your mortgage early.
Estimated prepayment penalty
Estimates for planning only, not financial advice.
A mortgage prepayment penalty is a fee for paying off your loan early, and on a $350,000 balance with a 2 percent year-one penalty it costs $7,000. Lenders charge it to recover the interest income they expected over the loan's early years. This calculator estimates the penalty under the three common structures so you know the true cost before refinancing or selling.
Most borrowers never face one: federal rules ban prepayment penalties on qualified mortgages, which covers the standard 30-year fixed most Americans hold. But non-qualified, jumbo, investor, and portfolio loans can still carry them, and the borrowers who have them are often the ones refinancing aggressively, exactly when the penalty bites.
How to Use This Calculator
Enter your remaining balance and rate, choose the penalty structure from your loan note, and select which year the payoff happens. Adjust the percentage or months to match your exact terms.
Find the prepayment clause in your mortgage note and note the structure and duration.
Enter the balance, rate, structure, and payoff year. Match the percent or months to your note.
Compare the penalty against the refinance savings in our refinance break-even calculator.
The Formulas
The declining structure is the friendliest common form because it fades: each year you wait cuts the fee. The months-of-interest method ties the penalty to your rate, so high-rate borrowers pay more, which stings precisely because they have the most to gain from refinancing. Flat percentages are simplest and often appear on investor loans.
Penalty Structures Compared
| Structure | Year 1 on $350k at 6.5% | Typical duration |
|---|---|---|
| Declining 2/1 | $7,000 | 2 to 3 years |
| 6 months interest on 80% | $9,100 | 2 to 5 years |
| Flat 2% | $7,000 | 1 to 3 years |
Hard versus soft matters as much as the amount. A hard penalty fires even when you sell, which can trap relocating borrowers; a soft penalty only fires on refinance, leaving a sale penalty-free. If you are choosing between loan offers, a slightly higher rate with no penalty often beats a lower rate with a hard three-year lock, because life changes faster than loan terms assume.
Worked Example
With the defaults: $350,000 balance, 6.5 percent rate, declining structure, payoff in year 1 at 2 percent. The penalty is $350,000 x 0.02 = $7,000, which is 2.00 percent of the balance. Switch to the months-of-interest structure with 6 months: $350,000 x 0.80 x 0.065 / 12 x 6 = $9,100. In year 3 under the declining schedule the penalty is $0, expired, so waiting twenty more months saves the full $7,000 if the refinance can wait.
Strategies Around the Penalty
First, verify it even applies: pull your note and check the dates, because penalties expire and servicers make mistakes. Second, use the annual penalty-free prepayment allowance, often 20 percent of the balance, to shrink the loan while you wait. Third, negotiate: lenders waiving the fee to keep your business is common, especially if you are refinancing into their own new loan. Fourth, time the refinance for the month after expiration rather than the month before; impatience is the most expensive part of most penalties.
My rule: never let a penalty stop a clearly winning refinance, just include it in the math. A $7,000 fee against $400 a month in savings breaks even in under 18 months even before counting closing costs. What the penalty should stop is marginal refinances where the savings barely cover the fees. For the mortgage math on the other side, our mortgage payment calculator prices any loan you are considering.
Reading Your Own Note
The prepayment clause lives in your mortgage note or deed of trust, usually under a heading like "Borrower's Right to Prepay." Read it literally: it states the penalty period in months from origination, the exact calculation, and whether it is hard or soft. Note the start date carefully, because the clock runs from the note date, not from your first payment or from closing.
Call your servicer to confirm the current payoff figure, which includes the penalty if one applies, plus any accrued interest and fees. Get it in writing; verbal payoff quotes are not binding. If the note is ambiguous, a real estate attorney can parse it in one billable hour, money well spent before a $7,000 surprise. And if you are shopping for a new loan, ask every lender to confirm in writing whether their offer carries a prepayment penalty, because the absence of a clause is the answer you want documented.
Estimates for planning only, not financial advice.Frequently Asked Questions
What is a mortgage prepayment penalty?
A fee some lenders charge if you pay off your mortgage early, usually within the first two to three years. It compensates the lender for the interest income it expected to earn. With the defaults, a $350,000 balance at a 2 percent year-one penalty costs $7,000.
Are prepayment penalties legal?
On qualified mortgages, which covers most standard US home loans, federal rules ban them. They still appear on some non-qualified mortgages, jumbo loans, investment-property loans, and portfolio loans. Always check your note: the penalty clause, if any, is spelled out there with the exact structure and duration.
What does a 2/1 prepayment penalty mean?
Two percent of the balance if you prepay in year one, one percent in year two, nothing after. It is the most common declining structure. On a $350,000 balance that is $7,000 in year one and $3,500 in year two, matching this calculator's declining option.
What is the months-of-interest method?
The penalty equals several months of interest, commonly six, computed on 80 percent of the outstanding balance. At 6.5 percent on $350,000, six months runs about $9,100. Some lenders use 100 percent of the balance instead of 80, so verify the base in your loan documents.
What is the difference between hard and soft prepay?
A hard prepayment penalty applies no matter how the loan is paid off, including selling the home. A soft penalty applies only to refinancing and lets you sell penalty-free. Soft is friendlier and more common; confirm which yours is before planning a move.
Can I negotiate the penalty away?
Sometimes. Lenders may waive it for a slightly higher rate, remove it after you ask, or agree to a soft instead of hard structure. If you are refinancing with the same lender, ask for a waiver outright; retaining your loan is worth more to them than the fee.
Does the penalty apply to partial prepayments?
Most loans with penalties allow limited extra principal each year, commonly 20 percent of the balance, without triggering the fee. Only a full payoff or a refinance trips it. This is why borrowers near the penalty window often make the maximum allowed extra payments while waiting it out.
How do I factor the penalty into a refinance decision?
Add it to the closing costs and recompute the break-even: monthly savings divided into total costs. A $7,000 penalty on top of $5,000 in closing costs needs much larger rate savings to justify. Our refinance break-even calculator runs the full comparison.
Do commercial loans have prepayment penalties?
Almost always, and steeper ones: yield maintenance or defeasance formulas that can cost far more than residential structures. Residential calculators do not apply to commercial notes, so get the exact formula from the loan agreement and have an attorney review it.
What happens if I just wait out the penalty period?
It expires automatically, usually after two or three years, and you can then refinance or sell freely. Mark the expiration date from your note, not from your memory of closing, because the clock starts at origination and some notes measure in months.