About PayOffPal

PayOffPal is a free mortgage extra payment calculator built for homeowners who want to understand the real impact of paying even a little extra toward their principal each month. We believe that mortgage calculators shouldn't be hidden behind paywalls, email gates, or upsells for refinancing services.

Why Extra Payments Matter

On a typical $350,000 mortgage with 20% down at 6.5% interest over 30 years, the total interest paid exceeds $340,000 — nearly as much as the original loan amount. An extra $200 per month directed at principal reduces the payoff timeline by about 7 years and saves over $100,000 in interest.

Most homeowners never see this math presented clearly. Banks send amortization schedules, but they don't show you what happens if you pay more. PayOffPal fills that gap with an instant, visual breakdown.

How We Calculate

We use standard amortization formulas — the same math your lender uses. For every extra dollar you add:

• Principal is reduced immediately
• Future interest charges drop (because interest is calculated on the remaining balance)
• The loan term shortens
• Total lifetime interest paid decreases

Our calculator runs these projections to the month, showing you exactly when your mortgage ends with and without extra payments.

Privacy First

All calculations happen in your browser. We do not store, log, or transmit any financial data you enter. There is no account to create, no email to provide, and no data to sell. Your mortgage details stay on your device.

How These Guides Are Written

These guides are drafted with AI assistance, then edited and published by Amado Sandoval, who builds and maintains this site. The calculations use standard amortization math, and figures are checked against publicly available industry data before anything goes live — including Fannie Mae/Freddie Mac's published loan pricing adjustments and FICO's own scoring research where credit-score topics are covered.

Telling you how this is made matters more to us than sounding bigger than we are. If you find a figure that is out of date or wrong, email hello@payoffpal.org and it will be corrected.

We are not mortgage brokers, lenders, or financial advisors. Our content is meant to help homeowners understand their options and ask better questions — not to replace advice from a qualified lender or financial advisor for your specific situation.

Disclosure

PayOffPal participates in the Google AdSense and Amazon Associates programs. We may earn revenue from ads displayed on this site or from qualifying purchases made through affiliate links. This helps us keep the calculator free without compromising accuracy or privacy.

PayOffPal exists because the question "what would happen if I paid an extra hundred dollars a month?" is surprisingly hard to answer well. Lender portals rarely show it. Generic loan calculators give you a monthly payment and stop. Spreadsheet templates work but require you to trust that whoever built the formula got the compounding right.

The calculator on the home page runs a full month-by-month amortization — the same arithmetic your servicer uses — and shows you the two schedules side by side: what happens if you change nothing, and what happens if you add the amount you are considering. No account, no email, no upsell to a premium tier.

How the Numbers Are Produced

For a fixed-rate loan, the monthly payment is derived from the standard amortization formula using your principal, your rate divided by twelve, and your term in months. From there we walk the loan forward one month at a time: interest for the month is the outstanding balance multiplied by the monthly rate, everything else in the payment reduces the balance, and any extra you specify is applied entirely to principal.

Because it is a real month-by-month simulation rather than a closed-form approximation, the payoff date and the interest totals are exact for a conventional fixed-rate mortgage, and the year-by-year table reflects the actual balance at each point.

What It Does Not Model

We would rather state the limits than let you discover them. The calculator assumes a fixed interest rate for the life of the loan, a constant extra payment, and no fees. It does not model adjustable-rate mortgages after their reset, interest-only periods, prepayment penalties, mortgage insurance dropping off at a given equity threshold, escrow for taxes and insurance, or the tax treatment of mortgage interest in your jurisdiction.

Those omissions matter in different ways. Escrow simply is not part of the payoff arithmetic, so leaving it out is correct. Mortgage insurance and tax effects are real money and are not captured here. If your loan is anything other than a straightforward fixed-rate mortgage, treat the output as an indication and confirm it with your servicer.

Privacy First

Everything runs in your browser. The figures you type — your balance, your rate, what you can afford to add — are held in your device's memory and nowhere else. There is no account, no analytics on your inputs, and no server that receives them. Close the tab and it is gone.

How This Site Is Funded

The calculator is free and always will be. The site is supported by display advertising and by affiliate links on our recommendations page, where we may earn a commission if you buy something after clicking through. That never changes your price, and it never influences the arithmetic — an advertiser cannot make the calculator return a friendlier number.

Not Financial Advice

PayOffPal is an educational tool. Whether prepaying your mortgage is the right use of your money depends on your other debts, your emergency savings, your retirement contributions, your tax position, and how much certainty you personally want. Those are not things a calculator can weigh. For a decision of that size, speak to a qualified financial professional who can see your whole picture.