Personal Loan Extra Payment Calculator
Test whether an extra monthly payment changes the payoff timeline enough to be worth the cash flow sacrifice.
Calculator
Personal Loan Extra Payment Calculator
Enter the balance you want to pay down faster.
Use the annual rate charged on the balance.
Enter the amount you already pay each month.
Add the recurring extra amount you want to test.
Example values are loaded.
Result
Your result
Adding $100.00 per month would shorten payoff by about 1 year 1 month.
Time saved
1 year 1 month
Interest saved
$993.22
New payoff time
3 years 9 months
Plan comparison
Next steps
Compare before you move on
Most people use one calculator to answer the first question and a related tool to pressure-test the decision.
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Personal Loan Payoff Target Calculator
Calculate the monthly payment needed to clear personal loan balance by a target date, with total interest and total paid.
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Debt Payoff Calculator
Estimate how long it could take to eliminate a balance based on your interest rate and monthly payment.
What this calculator shows
Small extra payments often matter more than expected because they cut principal earlier, which reduces future interest.
It is best used when you are testing whether a steady overpayment materially changes the payoff timeline and want to compare the regular path with a faster one.
How to use it
- 1. Enter the current balance and interest rate.
- 2. Add the payment you already make every month.
- 3. Test an extra monthly payment to compare time saved and interest saved.
Formula and assumptions
The calculator simulates the regular payoff plan and an accelerated plan month by month until the balance reaches zero.
Interest savings equal the difference between total interest under the regular plan and the accelerated plan.
Notes
This assumes extra payments are applied to principal, the rate stays fixed, and no new charges, penalties, or extra fees are added during the payoff window.
Worked example
A modest recurring overpayment can remove months or years from a payoff schedule depending on the rate.
This example uses the default sample inputs loaded on reset. It does not update with the live calculator entries above.
Time saved
1 year 1 month
Interest saved
$993.22
New payoff time
3 years 9 months
Feedback
Found a problem on this page?
Report confusing fields, broken math, or missing assumptions with the exact inputs you used so the issue can be reproduced.
FAQ
FAQ
Does every lender apply extra payments the same way?
No. Some lenders require specific principal-only instructions, so confirm the process before relying on the estimate.
FAQ
Why can a small extra payment save so much interest?
Because reducing principal earlier lowers the balance on which future interest is calculated.