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Mortgage Extra Payment Calculator

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See interest and time saved from additional mortgage payments with a balance chart.

  • 100% Free
  • No signup
  • Private & secure
  • Instant results
  • On your device

How much faster can I pay off my mortgage with extra payments?

On a $350,000 loan at 6.5% for 30 years, baseline principal and interest is about $2,212 per month. Adding $500 per month extra principal can cut payoff time by several years and save tens of thousands in interest. A one-time $10,000 lump sum early in the loan also shortens the term—enter both in the calculator to compare monthly extra versus lump-sum strategies.

Private on your device

Your information stays on your device and is not uploaded.

Related tools

Model additional monthly principal on a mortgage and compare payoff timelines with a balance-over-time chart for base vs accelerated payments. For extra payments on car, personal, or other loans, use the Extra Payment Calculator.

How to use this tool

1. Enter loan principal, APR, and original term in years. 2. Add your planned extra monthly payment. 3. Click Calculate. 4. Review savings and the balance chart comparing base vs extra-payment paths.

Worked example

$320,000 balance at 6.25% with 26 years remaining: $250 extra monthly can cut 4+ years and save $45,000+ interest; $15,000 lump sum at month 12 saves less total interest than the same amount spread as $250/month but helps if lump sum is available once.

Common examples

  • $400,000 loan at 6.75%: $500/mo extra saves ~7 years and ~$120k interest.
  • $10,000 lump sum at year 3 vs $200/mo extra from year 1—monthly extra often wins on total interest saved.
  • Biweekly half-payments modeled as one extra monthly payment per year.

How it works

Amortizes the baseline mortgage schedule, then applies extra monthly principal and/or lump-sum payments to show revised payoff date and interest saved versus the original schedule.

Limitations

Results are estimates for educational purposes and are not financial or tax advice. Actual costs, rates, and rules vary.

Privacy and file handling

Your data stays on your device and is not uploaded.

FAQ

Frequently asked questions

Is Mortgage Extra Payment Calculator free?

Yes. It is free to use and you do not need to sign in or create an account.

Is my data private?

See the privacy note on this page. Many tools run on your device; some heavier file tools may use secure temporary processing when required.

Can I use Mortgage Extra Payment Calculator on mobile?

Yes. Open this page on your phone or tablet, enter your inputs, and use the on-screen controls.

Part of these workflows

This tool is one step in a longer job. Jump straight to your step or open the full workflow guide.

Related pages

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