Personal Loan Payoff Calculator
Years
Months
Base Monthly Payment$0
Your Monthly Payment$0
Original Payoff Time-
New Payoff Time-
Months Saved-
Total Interest (original)$0
Total Interest (with extra)$0
Total Amount Paid (original)$0
Total Amount Paid (with extra)$0
Interest Saved (%)0%
Interest Saved
$0
| Month | Payment | Principal | Interest | Balance |
|---|
Rows shaded blue mark months where an extra payment was applied. Table shows the full payoff schedule with your extra payments included.
What Is a Personal Loan Payoff Calculator?
A personal loan payoff calculator shows you exactly how long it will take to repay a fixed-rate, fixed-term personal loan - the kind commonly used for debt consolidation, medical bills, home repairs, or a wedding - and how much interest you'll pay in total. Unlike a credit card, a personal loan has a set monthly payment and a defined end date, so this tool also models what happens if you add extra money toward the principal: how many months you shave off, and how many dollars in interest you avoid.
How to Use This Calculator
- Enter your loan amount (the amount you borrowed or still owe).
- Enter the interest rate (APR) from your loan agreement.
- Enter the loan term and choose whether it's in years or months.
- Optionally, add an extra monthly payment and/or a one-time lump-sum payment to see the payoff speed-up.
- Click Calculate to see your monthly payment, total interest, and a full month-by-month schedule.
Worked example: A $15,000 personal loan at 11.5% APR over 4 years has a base monthly payment of about $391.55 and costs about $3,794 in total interest. Adding just $50 extra per month cuts the loan short by roughly 5 months and saves over $400 in interest.
Formula Used
M = P x [ r(1+r)^n ] / [ (1+r)^n - 1 ]
Where:
M = monthly payment
P = loan principal
r = monthly interest rate (APR / 12 / 100)
n = number of monthly payments (term in months)
Where:
M = monthly payment
P = loan principal
r = monthly interest rate (APR / 12 / 100)
n = number of monthly payments (term in months)
Each month, interest is charged on the remaining balance, and the rest of the payment reduces the principal. When you add extra payments, that extra amount is applied directly to principal, which reduces the interest charged in every future month - compounding your savings over the life of the loan.
Who This Calculator Is For
- Anyone comparing personal loan offers from different lenders before signing.
- Borrowers considering debt consolidation and wanting to see the true payoff timeline.
- Anyone with an existing personal loan deciding whether extra payments are worth it.
- Budgeters who want a month-by-month breakdown, not just a single monthly payment figure.
Why ThinkForU's Calculator Is Different
| Feature | ThinkForU | Typical Calculators |
|---|---|---|
| Extra payment simulation | Monthly + one-time, combined | Often monthly only, or not supported |
| Full amortization table | Yes, scrollable, month-by-month | Frequently summary-only |
| Data storage | Zero - runs entirely in your browser | Often sends data to a server |
| Login required | No | Sometimes |
| Downloadable results | Yes, plain .txt export | Rarely offered |
Frequently Asked Questions
Is my financial data stored anywhere? +
No. This calculator runs entirely in your browser. Nothing you enter is sent to a server or saved anywhere.
What's the difference between a personal loan and a credit card? +
A personal loan has a fixed amount, fixed rate, and a set number of payments until it's paid off. A credit card is revolving debt with no fixed end date, and the minimum payment changes as your balance changes.
Does paying extra always save money? +
For most personal loans, yes, as long as there's no prepayment penalty. Extra payments reduce the principal directly, which lowers the interest charged on every remaining payment.
Should I check for a prepayment penalty first? +
Yes. A small number of personal loan lenders charge a fee for paying off the loan early. Check your loan agreement or ask your lender before making large extra payments.
How is the monthly payment calculated? +
It uses the standard amortization formula, based on the loan amount, monthly interest rate, and number of months in the term. See the Formula Used section above.
Can I use this for an existing loan, not just a new one? +
Yes. Enter your current remaining balance instead of the original loan amount, along with your current rate and remaining term, to see an accurate payoff picture from today forward.
Why does a one-time extra payment matter so much early on? +
Early in a loan, most of each payment goes toward interest. A lump sum applied early reduces the principal while more months of interest are still ahead, so it has a larger effect than the same amount applied later.