Mortgage Payoff Calculator
See how much faster you can pay off your home loan — and how much interest you'll save — with extra payments
Payoff Calculator
Enter your current loan details to see your accelerated payoff plan
Current Loan Details
Check your most recent mortgage statement for this.
Extra Payments
Applied to your very next payment (e.g. a bonus or tax refund).
Applied once a year (e.g. an annual bonus).
Interest Paid: Original vs. Accelerated
Original Schedule
With Extra Payments
Mortgage Payoff Calculator: Pay Off Your Home Loan Faster
If you already have a mortgage, the question isn't "what will my payment be?" — it's "how do I get rid of this faster?" Our free mortgage payoff calculator at MyCalculator.us shows you exactly how extra payments toward your principal shorten your loan term and cut your total interest, using your real current balance and remaining term — not your original loan amount.
What Is a Mortgage Payoff Calculator?
A mortgage payoff calculator projects a new, shorter amortization schedule based on your current loan balance, interest rate, and remaining term, plus any extra payments you plan to make. It answers three questions: when will the loan actually be paid off, how much interest will that save compared to sticking with the minimum payment, and how much faster does each extra dollar get you there.
How This Differs From Our Mortgage Calculator
Our mortgage calculator is built for home shoppers — it takes a home price and down payment and tells you what your monthly payment would be on a new loan. This payoff calculator is built for existing homeowners — it takes your current balance and remaining term and tells you how to shorten what's left. If you haven't bought yet, start with the mortgage calculator. If you're already paying one down and want to accelerate it, this is the tool.
How the Calculation Works
The calculator first works out your current required monthly principal & interest payment from your balance, rate, and remaining term, using the standard amortization formula:
M = B × [r(1+r)ⁿ] / [(1+r)ⁿ − 1]
Where:
- M = Required monthly principal & interest payment
- B = Current loan balance
- r = Monthly interest rate (annual rate ÷ 12)
- n = Remaining number of payments
From there, every extra dollar you add — monthly, one-time, or annual — goes straight to reducing principal, which means less interest accrues on every future payment. The calculator runs the full amortization month by month with your extras applied, and stops the schedule the moment your balance hits zero. [1]
A Real Example
Take a $250,000 balance at 6.5% interest with 25 years remaining. The required monthly payment is $1,688.02, and sticking to that minimum costs $256,405 in total interest over the remaining 25 years.
Add just $200 extra per month, and the loan is paid off in 19.5 years instead of 25 — a 5.5-year head start — while total interest drops to $191,477. That's $64,928 saved, for roughly $47,000 in extra payments over that shorter period.
| Minimum Payment Only | +$200/Month Extra | |
|---|---|---|
| Payoff Time | 25 years | 19.5 years |
| Total Interest | $256,405 | $191,477 |
| Interest Saved | — | $64,928 |
How to Pay Off a Mortgage Faster? [3]
- Add a fixed extra amount each month. Even $100–$200 makes a measurable dent, as shown above — use the calculator's "Extra Payment Impact" tab to see your own numbers.
- Switch to biweekly payments. Paying half your monthly payment every two weeks results in 26 half-payments a year — the equivalent of one extra full monthly payment annually, without it feeling like a big lump.
- Apply windfalls as one-time payments. Tax refunds, bonuses, or inheritance applied directly to principal can meaningfully shorten a loan with a single payment.
- Round up your payment. Rounding $1,688 up to $1,750 or $1,800 every month adds up the same way as a fixed extra payment.
- Refinance to a shorter term. A 15-year refinance forces a faster payoff through a higher required payment — different mechanism, similar result. Compare this against extra payments using our mortgage calculator.
Things to Check Before You Start Overpaying
- Prepayment penalties. Some loans charge a fee for paying off early or paying extra — check your loan agreement or ask your servicer.
- Confirm extra payments go to principal. Some servicers apply extra payments to next month's payment by default rather than reducing principal — you may need to specify this in writing or online. [2]
- Opportunity cost. Extra mortgage payments are a guaranteed return equal to your interest rate, but money paid into the house is illiquid — weigh this against retirement accounts, an emergency fund, or higher-interest debt.
- Mortgage interest deduction. If you itemize deductions, paying off your mortgage faster reduces the interest you can deduct. This is rarely a reason to avoid paying it off, but it's worth knowing.
This calculator provides estimates for planning purposes only and isn't tax or financial advice — for decisions specific to your situation, a financial advisor or tax professional can weigh in on the trade-offs above.
Frequently Asked Questions
What is a mortgage payoff calculator?
A mortgage payoff calculator estimates how quickly you can pay off your home loan and how much interest you'll save by making extra payments toward the principal, based on your current balance, rate, and remaining term.
How much faster can extra payments pay off my mortgage?
It depends on your balance, rate, and extra amount. On a $250,000 balance at 6.5% with 25 years remaining, an extra $200 a month pays off the loan 5.5 years early and saves roughly $64,900 in interest. Use the calculator above with your own numbers for an exact result.
Is it better to pay extra monthly or make one lump-sum payment?
A lump sum applied earlier saves slightly more interest than the same total spread out later, since it reduces principal — and the interest that accrues on it — sooner. In practice, consistent monthly extra payments are easier to sustain and produce very similar long-term savings.
Will my lender automatically apply extra payments to principal?
Not always. Many servicers apply extra amounts to your next scheduled payment instead of the principal balance unless you specify otherwise. Contact your loan servicer or check your online account settings to confirm extra payments are marked "principal only."
Does paying off my mortgage early have any downsides?
Possible downsides include prepayment penalties on some loans, reduced liquidity since money paid toward the house is harder to access, a smaller mortgage interest tax deduction if you itemize, and the opportunity cost of not investing that money elsewhere. None of these outweigh the benefit for most homeowners, but they're worth considering.