Financial · Live
What's the smartest way
to pay off a loan?
A precise personal-loan calculator with monthly payment, full amortization schedule, and an extra-payment simulator that shows exactly how much interest you'd save by paying ahead.
Inputs
Loan details
Pay off faster
Add an extra principal payment each month and watch the interest you save in real time.
- Scheduled payment
- $512.91
- Effective payment
- $512.91
- Payoff date
- May 2031
Monthly payment
60-mo · 8.5%
Fixed-rate, fully amortizing: same payment every month.
Interest
19%
Balance over time
Remaining loan balance
Schedule
Monthly amortization
| Month | Payment | Principal | Balance |
|---|---|---|---|
| 1 | $512.91 | $335.83 | $24,664.17 |
| 2 | $512.91 | $338.21 | $24,325.96 |
| 3 | $512.91 | $340.60 | $23,985.36 |
| 4 | $512.91 | $343.02 | $23,642.34 |
| 5 | $512.91 | $345.45 | $23,296.89 |
| 6 | $512.91 | $347.89 | $22,949.00 |
| 7 | $512.91 | $350.36 | $22,598.64 |
| 8 | $512.91 | $352.84 | $22,245.80 |
| 9 | $512.91 | $355.34 | $21,890.46 |
| 10 | $512.91 | $357.86 | $21,532.61 |
| 11 | $512.91 | $360.39 | $21,172.22 |
| 12 | $512.91 | $362.94 | $20,809.27 |
| 13 | $512.91 | $365.51 | $20,443.76 |
| 14 | $512.91 | $368.10 | $20,075.66 |
| 15 | $512.91 | $370.71 | $19,704.95 |
| 16 | $512.91 | $373.34 | $19,331.61 |
| 17 | $512.91 | $375.98 | $18,955.63 |
| 18 | $512.91 | $378.64 | $18,576.98 |
| 19 | $512.91 | $381.33 | $18,195.66 |
| 20 | $512.91 | $384.03 | $17,811.63 |
| 21 | $512.91 | $386.75 | $17,424.88 |
| 22 | $512.91 | $389.49 | $17,035.39 |
| 23 | $512.91 | $392.25 | $16,643.15 |
| 24 | $512.91 | $395.02 | $16,248.12 |
| 25 | $512.91 | $397.82 | $15,850.30 |
| 26 | $512.91 | $400.64 | $15,449.66 |
| 27 | $512.91 | $403.48 | $15,046.18 |
| 28 | $512.91 | $406.34 | $14,639.85 |
| 29 | $512.91 | $409.21 | $14,230.63 |
| 30 | $512.91 | $412.11 | $13,818.52 |
| 31 | $512.91 | $415.03 | $13,403.49 |
| 32 | $512.91 | $417.97 | $12,985.52 |
| 33 | $512.91 | $420.93 | $12,564.58 |
| 34 | $512.91 | $423.91 | $12,140.67 |
| 35 | $512.91 | $426.92 | $11,713.75 |
| 36 | $512.91 | $429.94 | $11,283.81 |
| 37 | $512.91 | $432.99 | $10,850.83 |
| 38 | $512.91 | $436.05 | $10,414.77 |
| 39 | $512.91 | $439.14 | $9,975.63 |
| 40 | $512.91 | $442.25 | $9,533.38 |
| 41 | $512.91 | $445.39 | $9,087.99 |
| 42 | $512.91 | $448.54 | $8,639.45 |
| 43 | $512.91 | $451.72 | $8,187.74 |
| 44 | $512.91 | $454.92 | $7,732.82 |
| 45 | $512.91 | $458.14 | $7,274.68 |
| 46 | $512.91 | $461.38 | $6,813.30 |
| 47 | $512.91 | $464.65 | $6,348.64 |
| 48 | $512.91 | $467.94 | $5,880.70 |
| 49 | $512.91 | $471.26 | $5,409.44 |
| 50 | $512.91 | $474.60 | $4,934.84 |
| 51 | $512.91 | $477.96 | $4,456.89 |
| 52 | $512.91 | $481.34 | $3,975.54 |
| 53 | $512.91 | $484.75 | $3,490.79 |
| 54 | $512.91 | $488.19 | $3,002.60 |
| 55 | $512.91 | $491.64 | $2,510.96 |
| 56 | $512.91 | $495.13 | $2,015.83 |
| 57 | $512.91 | $498.63 | $1,517.20 |
| 58 | $512.91 | $502.17 | $1,015.03 |
| 59 | $512.91 | $505.72 | $509.31 |
| 60 | $512.91 | $509.31 | $0.00 |
Field guide
How a loan payment is calculated.
A fixed-rate personal loan has the same payment every month for its entire term. Each payment is split into two parts: interest charged on the remaining balance and principal that pays the loan down. Early in the term the balance is large, so most of the payment is interest; near the end almost every dollar goes to principal.
The amortization formula
The monthly payment M for a loan of principal P at monthly rate r over n payments is:
- P: principal (amount borrowed)
- r: monthly interest rate (APR ÷ 12)
- n: total monthly payments (term in months)
- M: fixed monthly payment
What the APR really measures
The annual percentage rate (APR) is the all-in cost of borrowing expressed as a yearly percentage. For most personal loans the APR already includes origination fees, so the rate you punch into the calculator should match the APR your lender quotes — not a "rate" that excludes fees.
Why extra payments save so much
Interest compounds against the balance every month. When you pay an extra $50 or $100 toward principal, that money disappears from the balance permanently, so every future month's interest is calculated on a smaller number. The savings cascade — by the end of the loan, modest extra payments have shaved months off the term and thousands off the interest bill.
Worked example
Borrow $25,000 at 8.50% APR for 60 months: the scheduled payment is roughly $513/mo, with about $5,765 of total interest. Add just $50 extra each month and you'd pay the loan off about 6 months early and save roughly $700 in interest — for a single dinner's worth of money per month.
Personal loan vs auto loan vs mortgage
The math is identical for any fully-amortizing fixed-rate loan. What changes is the term and the typical rate: personal loans sit around 2–7 years, auto loans 3–8 years, and mortgages 15–30 years. Longer terms shrink the monthly payment but multiply the total interest paid, sometimes by 2× or more.
What this calculator doesn't model
We assume a fixed APR, no variable rate adjustments, no late fees, no prepayment penalties, and that extra payments are applied to principal (not future scheduled payments). Some lenders apply prepayments to "future months" by default — call and ask before you start paying ahead.
Disclaimer
Results are estimates for educational purposes. Always confirm payment amounts and terms with your lender before signing.