Mortgage Payoff Calculator
Work out how extra or biweekly payments shorten your mortgage and cut the interest you pay — in the currency of your choice.
Use this if you know how many years/months are left on the loan — ideal for a new mortgage or one you've never made extra payments on.
Use this if the remaining term is unknown but you know the current balance, monthly payment, and interest rate — usually found on your mortgage statement.
Uses of this tool
A mortgage payoff calculator answers one practical question: if I send extra money toward my mortgage, how much time and interest do I actually save? The tool below models that for you instantly, in whichever currency you work in.
How to use the calculator
- Pick a currency from the dropdown at the top so all figures display the way you expect.
- Choose a tab. If you know how many years/months are left on the loan, use the first tab. If you only know your current balance and payment, use the second.
- Fill in your numbers — loan amount or balance, term, and interest rate come straight from your mortgage statement or original loan documents.
- Select a repayment option. Add a monthly, yearly, or one-time extra payment, switch to biweekly, model a lump-sum payoff, or leave it as a normal repayment to see your baseline.
- Press Calculate. The results panel shows your new payoff date, interest saved, time saved, and a side-by-side comparison table.
- Read the chart. The blue and black lines are your original balance and interest; the green and red lines show the new schedule with your extra payments applied.
Understanding your mortgage payoff
Every mortgage payment is split between interest and principal. Early in the loan, most of each payment covers interest because the outstanding balance is still large; as the balance shrinks, a growing share of each payment chips away at principal instead. This is why extra payments made early in the loan's life tend to save more interest than the same extra payment made later — the money has more years to stop compounding.
Extra payments
Sending anything above your required payment — monthly, annually, or as a single lump sum — goes straight to principal. That smaller principal balance means every future interest calculation shrinks too, which is why even a modest recurring extra payment can knock years off a 30-year loan and save a meaningful sum in interest.
Biweekly payments
Paying half your monthly payment every two weeks results in 26 half-payments a year — the equivalent of 13 full monthly payments instead of 12. That one "extra" payment a year is applied to principal automatically, without you having to think about budgeting a separate lump sum. It's a popular option for anyone paid biweekly, since the payment schedule already lines up with the paycheck.
Refinancing to a shorter term
Another route to paying off a mortgage faster is refinancing into a shorter term, sometimes at a lower rate. The monthly payment usually rises, but the total interest paid over the life of the loan can fall substantially. This calculator doesn't model refinancing directly, but you can approximate it by entering the new rate, new term, and remaining balance as if it were a fresh loan.
Watch for prepayment penalties
Some loans charge a fee if you pay them off ahead of schedule, particularly within the first few years. Government-backed loans typically prohibit this, but conventional loans can include it in the fine print. Check your loan documents or ask your lender before committing to an aggressive extra-payment plan, so any penalty doesn't erase the interest you're trying to save.
Weigh the opportunity cost
A mortgage is usually one of the cheapest forms of borrowing available, so paying it off faster isn't automatically the best use of spare cash. Before directing extra money here, most financial planners suggest clearing higher-interest debt first, building an emergency fund, and capturing any employer retirement match. Only after those boxes are checked does an early mortgage payoff tend to make sense purely on the numbers — though plenty of people still choose it for the peace of mind of owning their home outright.
Examples
Example 1 — The steady extra payment
Maria has a 400,000 balance on a 30-year loan at 6% with 25 years left. She starts sending an extra 500 a month. Instead of paying the loan off in 25 years, she clears it in roughly 17 years and 3 months — saving well over 100,000 in interest along the way.
Example 2 — Switching to biweekly
Dávid gets paid every two weeks, so instead of one monthly payment he splits it in half and pays every payday. Without changing his budget at all, he ends up making one extra full payment a year, trimming several years off his mortgage.
Example 3 — The debt-free retiree-to-be
Erzsébet is a few years from retirement, has no other debt, and has already maxed out her retirement accounts. She uses a one-time payment from a savings bonus to pay off her remaining balance early, so she can start retirement mortgage-free.
FAQs
This calculator is provided for educational purposes only and does not constitute financial advice. Figures are estimates based on standard amortization math and may differ from your lender's official schedule. Speak with a qualified financial advisor or your loan servicer before making decisions about your mortgage.
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