Mortgage Payoff Calculator
Free mortgage payoff accelerator. See how extra monthly payments shorten your term and save interest. Payoff date and interest saved. No signup.
What is a mortgage payoff accelerator?
A mortgage payoff accelerator shows how much faster you can clear your mortgage by adding extra money to the regular payment each month — the new payoff date, the months shaved off the term, and the interest you save.
How this calculator works
- Enter your mortgage balance, interest rate, original term, and the extra monthly payment you’re considering.
- It runs the amortization month by month, with the extra amount applied straight to principal.
- Baseline interest (no extra) is compared with the accelerated plan.
- Results show months saved, interest saved, and the new payoff date.
How to use the result
- Compare interest saved against what the same money would earn elsewhere — at today’s savings rates, paying a 6%+ mortgage early usually wins.
- Check the payoff date against your plans — if you’re selling in 5 years, extra payments mostly just shift equity you get back anyway.
- Confirm with your lender that extra payments reduce principal, not just sit in escrow.
- Keep an emergency fund before accelerating — extra mortgage payments are hard to un-make.
How much faster does an extra payment pay off a mortgage?
On a $300,000 mortgage at 6.5% over 30 years, an extra $200 a month cuts the term from 30 years to about 23 years and saves roughly $100,000 in interest. The effect is strongest early, because every early extra dollar avoids decades of compounding interest.
Common mistakes
- Accelerating before paying high-interest debt. A credit card at 20%+ should be cleared before extra mortgage principal.
- Starving the emergency fund. Tying up all spare cash in the house leaves no buffer for repairs or income gaps.
- Assuming one big annual payment beats monthly. Both work; monthly extras are easier to budget and compound slightly sooner.
The payoff math is the reverse of the retirement calculator’s growth — compounding against you instead of for you. The refinance calculator can show whether a lower rate beats extra payments for the same goal.