Track your mortgage, test extra payments, and see exactly how they affect your payoff date, interest, and equity.
Free to use. No bank login required, so your numbers stay yours.
How it works
No spreadsheets, no formulas to get wrong. Just your loan details and a clear picture of where every dollar goes.
Enter your balance, rate, and term once. MortMetrix builds your full amortization schedule instantly.
Your loan
$420K @ 6.25%
MortMetrix
Ready to model
Every payment split into principal, interest, and equity, so you always know what's actually paying down your loan.
$67,500
Model extra payments or a one-time lump sum and see exactly how much interest you'd save and how many years you'd cut.
Pay $150/mo extra
Saves $79,300 in interest · payoff 4 yrs 1 mo sooner
Enter your balance, rate, and term once. MortMetrix builds your full amortization schedule instantly.
Your loan
$420K @ 6.25%
MortMetrix
Ready to model
Every payment split into principal, interest, and equity, so you always know what's actually paying down your loan.
$67,500
Model extra payments or a one-time lump sum and see exactly how much interest you'd save and how many years you'd cut.
Pay $150/mo extra
Saves $79,300 in interest · payoff 4 yrs 1 mo sooner
Mortgage Optimization
Not generic advice. Real numbers, run against your actual loan.
Set a recurring extra once, monthly or every two weeks, and MortMetrix posts it on schedule. No reminders to chase, no logging it yourself.
See your new payoff date, months saved, and interest saved before you commit a dollar. Even small extra mortgage payments can cut years off your loan.
See exactly how much of your home you own outright. Equity and loan-to-value update automatically as your balance drops.
Scheduled payments post against your amortization automatically, so your balance, equity, and payoff date stay current without any bookkeeping.
See exactly where each payment goes. Early payments are mostly interest, so extra dollars paid now do more than the same dollars paid later.
Understand what PMI actually is, what you've paid toward it, and exactly when it's projected to drop off your loan.
Also included
ARM and variable rates
3/1 through 10/6, with reset reminders
Multiple mortgages
Track every loan, switch in a tap
Original vs Actual
Your real progress against day one
Start from today's balance
No need to rebuild from origination
Installs on your phone
Add it to your home screen like an app
Progress milestones
Told the moment your payoff date moves
Try it yourself
No account needed. Enter a loan amount and see the impact instantly.
Assumes
Extra Monthly Payment
$106,168
Interest saved
5 yrs 3 mos
Time saved
Jun 2051
New payoff date
Want this with your real rate, term, and ongoing tracking?
Create My Free AccountEstimates only, based on a 30-year loan with monthly payments and the assumptions above, not your actual loan terms.
Your lender sends a statement. MortMetrix shows you where you started, where you are now, and the date you'll be done.
The part nobody tells you
Sourced figures from 2024 to 2026 on where a mortgage quietly drains money, and what changes once you look.
The rare few
Only 1 in 4 homeowners ever pay a dollar extra toward principal.
Rocket Mortgage servicing data from 2021 to 2026 shows roughly 25% of borrowers make voluntary extra payments. The other 75% ride the loan out for the full 30 years.
MortMetrix flags it the moment you're paying only the minimum, then shows the exact payoff date a small monthly top-up would buy you.
Free to start. No bank login, just your loan details.
Accuracy & Privacy
MortMetrix uses a full amortization schedule to track principal, interest, payments, and projected payoff, not simplified estimates.
Built around the same mortgage mathematics that determine your loan's payment schedule.
Your lender's schedule
MortMetrix calculation
✓Guides
In-depth guides that answer one real question each and show the working. Every example runs on a $400,000 loan at 6.25%, so you can compare against your own.
Seven strategies, each with the years and interest it saves.
ReadWhat it costs, how it's calculated, and how it comes off your loan.
ReadWhy the split between interest and principal shifts over 30 years.
ReadAdd your mortgage and see your payoff date, equity, and potential savings in minutes.