Loans & Debt · Existing Loan
Mortgage Prepayment & Early Payoff Calculator (US)
Compare your US mortgage with and without extra payments: an extra amount every month, once a year, a one-time lump sum, half-payments every two weeks, or paying the whole loan off at a chosen payment. See the new payoff date, the time and interest you save, when PMI ends, and any prepayment penalty or payoff fee.
Your inputs
$ 400 thousand
$ 1.5 thousand
Your result Live
Interest Saved
$105,429
Paid off 6 yr 7 mo sooner · Payment 281 (year 24) instead of Payment 360 (year 30)
- Payoff Date: Without → With Extra Payments
- Payment 360 (year 30) → Payment 281 (year 24)
- Time Saved
- 6 yr 7 mo
- Total Interest: Without → With Extra Payments
- $408,142 → $302,714
- Net Saving After Penalties
- $105,429
- Loan Amount
- $320,000
- Down Payment
- $80,000 (20%)
- Principal & Interest (monthly)
- $2,023
- Extra Each Month
- $200 from payment 1
- Property Tax (monthly)
- $367
- Home Insurance (monthly)
- $125
- Regular Monthly Payment (before extras)
- $2,514
Year by year with your extra payments, until the loan closes
24 rowsWithout extra payments vs with extra payments
8 rowsThis is an estimate for a fixed-rate loan. Your servicer's payoff statement and loan papers show the actual figures.
Tell your servicer that extra money is for principal only, and check your next statement to see that the balance went down.
Property tax, home insurance and HOA dues are left out of the comparison: you keep paying them after the loan is paid off. They are shown in the summary.
An estimate from the assumptions you entered, not a guaranteed outcome.
How this is calculated
Each month: interest = balance × r; principal = M − interest; balance falls by principal + extra
- M
- Regular monthly principal and interest: P × r × (1+r)ⁿ / ((1+r)ⁿ − 1)
- P
- Loan amount (home price minus down payment)
- r
- Monthly interest rate (APR ÷ 12)
- n
- Number of monthly payments (years × 12)
- extra
- Extra principal that month: monthly extra + yearly extra + lump sum + biweekly top-up (M ÷ 12)
Every month, interest is charged on the balance you still owe, and the rest of your regular payment pays down the principal. Any extra money you pay goes straight to principal, so the next month's interest is smaller and more of every later payment goes to principal too. That is why a small extra each month can take years off a 30-year mortgage. This calculator runs your loan twice, month by month, once with only the regular payments and once with your extra payments, and compares the payoff date, total interest and when PMI ends. Paying half your payment every two weeks adds up to one extra full payment a year, which is counted here as one-twelfth of a payment extra every month. If you pay off in full, the payoff amount is the balance left after that payment plus any fee and prepayment penalty.
Assumptions & sources
- A fixed-rate loan repaid monthly; the monthly rate is the APR divided by 12 (US convention). Extra money goes to principal on the day of a regular payment.
- Biweekly payments are counted as 13 full payments a year: one-twelfth of the monthly principal and interest is added to every monthly payment as extra principal.
- PMI applies only when the loan starts above 80 % of the home price, is charged on the original loan, and ends at 80 % of the original value when you ask (actual balance) or automatically at 78 % on the original schedule, whichever you choose. The home price stands in for the original value. The rule that ends PMI at the middle of the loan term at the latest is not modelled.
- A prepayment penalty, if entered, is a percentage of the amount prepaid, charged on the lump sum and on a payoff in full inside the penalty years, not on regular extra payments.
- A payoff fee is charged once when the loan closes, early or on schedule. A payoff in full is made on a payment date, so there are no extra days of interest.
- Property tax, home insurance and HOA dues are flat and are not part of the comparison, because they continue after the loan is paid off.
- Amounts are in US dollars and are estimates; your servicer's payoff statement is the authority.
- 112 CFR 1026.43(g): limits on prepayment penalties — eCFR via Cornell LII
- 212 CFR 1026.36(c)(3): payoff statements — eCFR via Cornell LII
- 312 CFR 1024.34(b): treatment of escrow balances at payoff — eCFR via Cornell LII
- 4Homeowners Protection Act, 12 U.S.C. 4901 and 4902 — US Code (Cornell LII)
- 5How and when can I cancel private mortgage insurance (PMI)? — Consumer Financial Protection Bureau
- 6What is a prepayment penalty? — Consumer Financial Protection Bureau
- 7What is foreclosure? — Consumer Financial Protection Bureau
- 824 CFR 203.558 (FHA), 38 CFR 36.4311 (VA), 7 CFR 3555.104 (USDA) — eCFR via Cornell LII
Calculator ID FIN-LON-MTG-002 · version 1.0.0
Common questions
How much do extra mortgage payments save?
On a $320,000 loan at 6.5 % for 30 years, the regular payment is about $2,023. Adding $200 a month from the first payment pays the loan off after 281 payments instead of 360, 6 years and 7 months sooner, and saves about $105,429 in interest. The earlier you start, the more you save, because the extra cuts the balance that interest is charged on for every month that follows.
Is paying off a mortgage early the same as foreclosure?
No. In India, paying off a loan before its term ends is often called "foreclosing the loan", so you may see a "mortgage foreclosure calculator" meaning an early payoff calculator. In the US, foreclosure means something very different: the lender takes action to recover the debt by selling the home, usually after the borrower stops paying. Paying off early is your choice and closes the loan; you own the home free of the mortgage.
Do biweekly payments really help?
Yes, because 26 half-payments a year add up to 13 full payments instead of 12. On the $320,000 example that pays the loan off in about 24 years 2 months and saves about $93,000 in interest. Check how your servicer handles it: some apply each half-payment when it arrives, some hold it until the full payment is there, and some third-party programs charge a fee. Paying one-twelfth extra each month gets nearly the same result with no special program.
Is there a penalty for paying off my mortgage early?
Most US mortgages have none. Under federal rules for most mortgages, a prepayment penalty is allowed only on a fixed-rate qualified mortgage that is not higher-priced, is capped at 2 % of the amount prepaid in the first two years and 1 % in the third, and is not allowed after three years. FHA lenders must accept a prepayment at any time and in any amount, VA loans can be prepaid without a premium or fee, and USDA guaranteed loans cannot require one. State law can be stricter. Check your note and Closing Disclosure.
When does PMI come off if I pay extra?
You can ask your servicer in writing to cancel PMI once your balance reaches 80 % of the home's original value, and extra payments get you there sooner. You need a good payment history and to be current, and the servicer can ask for proof the home hasn't lost value. If you don't ask, PMI ends automatically when the original schedule reaches 78 %, and extra payments don't move that date. Choose either rule under More options & assumptions.
How do I find my exact payoff amount?
Ask your servicer for a payoff statement. For most home loans it must be sent within 7 business days of your written request. It shows the balance, interest up to the payoff date and any fees. This calculator's payoff amount is the balance after the payment you choose plus any fee and penalty you enter, so it is close but not exact.
What happens to my escrow account after payoff?
Your servicer must generally refund what is left in the escrow account within 20 days of the payoff, not counting weekends and legal public holidays, unless you agree to move it to the escrow account of a new mortgage with the same lender or servicer. After payoff you pay property tax and home insurance yourself.
Should I make sure extra payments go to principal?
Yes. When you pay extra, tell your servicer the extra is for principal only, through its website, a note on the payment or a call, and check the next statement. Otherwise it may be held or treated as an early regular payment, which doesn't cut your interest the same way.
Is a lump sum better than paying extra every month?
Money paid earlier saves more interest, because it stops interest from being charged on it for longer. A $20,000 lump sum with payment 12 on the $320,000 example saves about $92,635 and ends the loan after 305 payments. Try different amounts and timings here and compare the interest saved.
Where is the regular payment calculator?
Use the Mortgage Payment Calculator (US) to work out your monthly payment with property tax, home insurance, PMI and HOA dues and the full amortization schedule. This page starts from the same inputs and adds extra payments and early payoff.