Calculator · Extra payment
Extra payment calculator.
Extra payments can reduce interest and shorten payoff time. The right call depends on liquidity, reserves, other debt, and opportunity cost — not just the payoff math. Planning only. Not a loan offer or rate quote.
Three ways to make the number useful.
Consistency beats size
A smaller extra payment made every month often beats a larger one made occasionally. Model what you'd realistically keep up — not the heroic scenario that breaks the first time life shows up.
Compare two or three amounts
Run $100, $200, and $500 extra against the same loan and see how time saved and interest avoided scale. The non-linear part of the math is where the decision usually lives.
Compare against the alternative
Extra principal is one option. Building reserves, paying down higher-cost debt, or investing are others. The right call usually depends on liquidity, other rates, and tax position — not just mortgage payoff math.
Loan details
Extra payment strategy
Choose a strategy or enter your own amount. Consistency matters more than size — a smaller extra payment maintained over time can outperform a larger one made irregularly.
Decision outputs
This payoff model does not include investment returns, tax effects, or opportunity cost.
Estimate only. Not a loan quote, approval, or commitment to lend. Interest rate inputs are not APRs. Actual savings depend on payment timing, servicer posting rules, and whether extra payments are applied to principal.
The math is loud. The tradeoffs are quiet.
Opportunity cost is real
Cash sent to principal is cash that isn't sitting in reserves, isn't paying down higher-rate debt, and isn't invested. A calculator can show interest saved on the loan; it can't price what you gave up to get it.
Liquidity changes the answer
Equity in the home isn't easy to get back without a refi or a HELOC. If reserves are thin or income is variable, faster payoff can leave you cash-poor in a year that punishes that.
It is not financial advice
Output is a planning estimate based on your inputs. Not a recommendation, not tax advice, not investment advice. The right strategy depends on your full picture — not a single screen of payoff math.
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Planning tool only. This calculator provides estimates to help evaluate scenarios. It is not a loan offer, not a rate quote, and not a commitment to lend.
No APR and no Loan Estimate. Interest rate inputs are not APRs and results do not represent a Loan Estimate. Your official lender Loan Estimate and closing disclosure control final terms and costs.
Assumptions and limits. Results are based on the inputs you provide and standard amortization math. They do not include all settlement charges, escrows, prepaid items, taxes, insurance, HOA dues, mortgage insurance changes, credit score impacts, or underwriting conditions.
No approval or qualification. This calculator does not determine approval, eligibility, ability to repay, or affordability.
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