How personal loan payments work
A personal loan is a fixed-rate, fixed-term installment loan. Your monthly payment stays the same throughout the life of the loan, but the split between interest and principal shifts: early payments go mostly to interest; later payments mostly reduce your balance.
On a $15,000 loan at 10% for 60 months, your monthly payment is approximately $319 and total interest paid is roughly $4,100 — about 27% of the original loan. That same $15,000 at 15% for 60 months costs approximately $357/month and roughly $6,400 in total interest — a $2,300 difference from a 5% rate change.
The calculator is pre-filled with mid-range personal loan figures. Update the fields to match your offer. Check multiple lenders and run each offer through the calculator — the difference between lenders on the same amount can be thousands of dollars in total interest.
APR vs interest rate: what the calculator uses
Personal loan lenders typically quote two rates: the interest rate (also called the nominal rate) and the APR (annual percentage rate). The APR includes origination fees and other lender charges, making it the more accurate cost-of-borrowing figure.
This calculator uses the interest rate — the number that drives the actual payment calculation. If you enter the APR instead, the payment will be slightly overstated (because APR folds in one-time fees, not recurring interest). For a precise comparison, use the interest rate your lender quotes for the payment calculation and factor origination fees into your total-cost comparison separately.
If your lender only quotes an APR and no separate rate, entering the APR gives a conservative (slightly high) estimate of your payment — safe for budgeting purposes.
Personal loans vs alternatives
Personal loans are unsecured — they are not backed by collateral — so rates are higher than secured loans like mortgages or auto loans. Compared to credit cards, personal loans offer a fixed payoff date, a fixed rate, and typically a lower rate if your credit qualifies.
For home improvement projects, a home equity loan or HELOC (home equity line of credit) is usually cheaper because it is secured against your home — but it comes with closing costs and the risk of foreclosure if you default. For debt consolidation, a personal loan can simplify multiple high-rate debts into a single fixed payment at a lower rate.
Use this calculator to compare the total cost of a personal loan against your current situation — whether that is carrying a credit card balance, using savings, or another financing option.
Frequently asked questions
How do I calculate a personal loan payment?
Use the amortization formula: M = P × [r(1+r)^n] / [(1+r)^n − 1]. On a $15,000 personal loan at 10% for 60 months (5 years), the monthly payment is approximately $319 and total interest paid is roughly $4,100. The calculator above computes this instantly for any loan amount, rate, and term.
What is a good interest rate for a personal loan?
Personal loan rates vary with your credit score and the lender. Borrowers with excellent credit (720+) can often find rates in the 6–12% range. Average credit borrowers typically see 13–20%. Rates above 25% are common in the subprime or short-term lending market. Credit unions typically offer lower rates than online lenders or banks for the same borrower profile. This calculator is given-a-rate — enter the rate you have been offered to see the exact payment and total cost.
Should I get a personal loan or use a credit card?
For amounts you plan to repay over more than a few months, a personal loan almost always costs less than a credit card. Personal loan rates average 10–20%; credit card rates average 20–30%, and credit card interest compounds daily. A personal loan also gives you a fixed payoff date and a guaranteed end to the debt. Credit cards can be cheaper for small purchases you pay off within the grace period (0% cost) or for 0% promotional balance transfers — but only if you clear the balance before the promotional period ends.
How long should my personal loan term be?
Shorter terms mean higher monthly payments but lower total interest. On a $15,000 / 10% loan: a 36-month term costs approximately $484/month and roughly $2,418 in interest; a 60-month term costs $319/month but $4,100 in interest — $1,682 more. Choose the shortest term your budget can support comfortably. Use the "Compare terms" mode in the calculator to see both scenarios for your specific loan.
Can I pay off a personal loan early?
Yes — most personal loans allow early repayment. Some lenders charge a prepayment penalty (typically 1–5% of the remaining balance), so check your loan agreement first. If there is no penalty, paying extra saves you the interest on all remaining periods that would have been charged on that principal. Use the "Payoff accelerator" mode to see exactly how much time and interest you save with any extra monthly payment.