Mortgage Calculator Paying More Than Minimum

Reviewed by: David Chen, CFA
David Chen is a Certified Financial Analyst with over 10 years of experience in mortgage analytics and accelerated payoff strategies.

Use this free mortgage calculator paying more than minimum to see how much interest and time you’ll save by adding extra to every monthly payment.

Mortgage Calculator Paying More Than Minimum

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Extra Payment Mortgage Formula

Standard Monthly P&I: M = P × [ r(1+r)^n ] / [ (1+r)^n – 1 ]

Interest Saved: Original interest – interest with extra

Time Saved: Original months – months with extra

Formula Sources: Bankrate | Investopedia

Variables

  • P: Loan amount after any down payment.
  • r: Monthly interest rate (annual rate ÷ 12).
  • n: Total scheduled monthly payments (years × 12).
  • Extra Monthly: Additional principal you pay each month.

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What Is Paying More Than the Minimum Mortgage?

Paying more than the required monthly amount directly reduces your principal balance, slashes total interest, and shortens the loan term. Even an extra $100–$300 per month can eliminate years of payments and save tens of thousands in interest.

This calculator shows the combined effect of your chosen extra payment every single month until the loan is paid off.

How to Calculate Mortgage with Extra Payments (Example)

  1. Enter your original loan amount (e.g., $250,000).
  2. Input the interest rate (e.g., 6.0%) and original term (e.g., 30 years).
  3. Set the extra amount you can add each month (e.g., $250).
  4. Click “Calculate” to see months saved and total interest avoided.

Frequently Asked Questions (FAQ)

How much can I save by paying extra? On a 6% loan, an extra $200/month saves ~$50k and 5-6 years.

Does every extra dollar go to principal? Yes—specify “principal only” when you make the payment.

When is the best time to start? As early as possible; the first 5 years of interest are the heaviest.

Can I skip extra payments later? Extra payments are voluntary, but consistency maximizes savings.