Early Loan Payoff Calculator

Goal-driven inverse: for a target tenure, compute the payment that clears the balance over that shorter term, then the extra = new payment − current payment. A lump sum is the amount that lets the current payment finish on target.

Start from the goal, not the payment

Most prepayment tools ask “if I pay this much extra, how much sooner do I finish?” This one works the other way round, which is how people actually think: you decide when you want to be debt-free — finish five years early, or clear the loan in twelve — and it tells you the payment that gets you there. That can be an extra amount on top of your payment, a higher payment, or a single lump sum now. The maths is a clean inverse of the payment formula: for a shorter target tenure, it computes the payment that clears your balance in that time, and the difference from your current payment is the extra you need.

Alongside the required payment, you see what the goal buys you — the interest saved, the time saved, and the new total cost — so you can judge whether the stretch is worth it.

Worked example — $300,000 left at 6.5% with 25 years to run: The current payment is about $2,026. To finish 5 years early — in 20 years — the payment rises to roughly $2,237. That extra $211 a month saves about $70,900 in interest and clears the loan five years sooner.

Extra, new payment, or a lump sum

There are three ways to hit the same goal, and the calculator solves for whichever suits you. “Extra per month” keeps your payment as the baseline and tells you the top-up. “New payment” gives the full revised payment. “One-time lump sum” finds the single amount to pay now so that — continuing your current payment — the loan still finishes on your target date. A lump sum is powerful because it removes principal immediately, before it can accrue any more interest, so a modest sum today can buy a surprising amount of time.

You can also combine them: enter a lump sum you can manage now under the advanced options, and the calculator reduces the extra monthly payment needed to reach the same goal.

Watch the penalty — and the alternatives

Clearing a loan early can trigger a foreclosure or prepayment charge — usually a percentage of the balance you settle ahead of schedule. Most floating-rate home loans waive it, but fixed-rate and many personal loans do not. Enter the penalty and the calculator nets it against the interest saved, so you see whether the early payoff still pays — it usually does, comfortably, but it is worth confirming.

The “pay more, finish sooner” figures show the trade-off curve: what it takes to finish a quarter, half or three-quarters of the way sooner. A little more each month buys a lot of time early on, then the cost of each additional year of acceleration rises — which helps you find the sweet spot between ambition and affordability.