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What Payment Pays Off My Loan in the Time I Want

On a $300,000 balance at 6% with a 30-year original term, paying it off in 15 years requires about $2,532 a month — roughly $812 more than the original $1,799 payment. The extra $812 saves about $176,000 in interest versus the original schedule. The payment is found by re-amortizing the balance over your target number of months using the standard loan formula.

Results

Visualization

RateFig provides estimates for educational purposes only. Mortgage and loan figures depend on your credit, fees, points, and individual lender terms. This is not financial advice. Confirm every number with a qualified loan officer before making a decision.

How It Works

We apply the loan-payment formula with your target number of months instead of the original term: P = L × r × (1+r)^n / ((1+r)^n − 1), where n is your desired payoff months. The extra over your current payment is the gap between this new payment and the original. Total interest under the faster plan is the new payment times n minus principal, and the savings is the difference versus the original schedule. The chart shows both balances reaching zero at different times.

What Should You Do?

Accelerating payoff is one of the surest financial wins because it cuts interest with certainty. Before committing to a higher payment, confirm there is no prepayment penalty and that you still have an emergency fund and retirement contributions covered. If the extra payment stretches your budget, even a modest increase (or annual lump sums) shortens the term meaningfully — see the extra-payment simulator for exact numbers.

Frequently Asked Questions

Is paying off early always smart?

Usually yes if the rate exceeds what you could safely earn elsewhere and you have no higher-interest debt. Keep an emergency fund first.

What if I cannot afford the full extra?

Any extra helps. Even $100 a month shortens the term and cuts interest; you do not need the full target payment.

Should I refinance to a shorter term instead?

A 15-year refinance bakes in the faster payoff, often at a lower rate, but it locks in the higher payment. Compare with our 15 vs 30 tool.

Are there prepayment penalties?

Some loans charge a fee for early payoff. Check your note; most modern conforming mortgages do not.

Does this change my tax deduction?

Faster payoff means less interest, so a smaller mortgage-interest deduction. Weigh that against the interest saved.

Can I switch back if money gets tight?

With a fixed extra principal payment you can always stop; a formal shorter-term refinance makes the higher payment mandatory.