About the Remaining Loan Balance Calculator
This remaining loan balance calculator tells you how much you still owe on a fixed-rate installment loan after any number of monthly payments. Enter the original amount, interest rate and term, then the number of payments you have made, and it shows the outstanding principal along with how much of what you have paid so far went to interest versus principal.
It is handy when you are thinking about paying a car loan or personal loan off early, refinancing, selling a financed vehicle, or checking a lender statement. Because early payments are interest-heavy, the balance usually falls more slowly than people expect — halfway through the term you typically owe more than half of the original amount.
The calculation assumes every payment was made on time for the standard amount, with no extra principal payments and a rate that never changed. A lender payoff quote may differ slightly because of daily interest accrual and fees.
With the default inputs, the remaining balance is $16,032.27. Change any value above to recalculate instantly.
How to use the remaining loan balance calculator
- 1Enter the original loan amount from your loan agreement.
- 2Enter the interest rate and the original term in months.
- 3Enter how many monthly payments you have made so far.
- 4Read your remaining balance and how much interest is still ahead of you.
Formula and method
The remaining balance B after k payments equals the original principal grown at the loan’s monthly rate for k months, minus the accumulated value of the k payments made. This is the closed-form version of stepping through an amortization schedule month by month.
The payment M comes from the standard amortization formula for the original amount, rate and term. Principal paid so far is P − B, interest paid is k × M minus that principal, and remaining interest is the remaining payments minus the balance. With a 0% rate the balance is simply P − k × M.
- B
- Remaining balance
- P
- Original loan amount
- r
- Monthly interest rate (APR ÷ 12 ÷ 100)
- k
- Number of payments made
- M
- Fixed monthly payment
Worked examples
$25,000 at 7% for 60 months, 24 payments made
The monthly payment is $495.03. After two years you have paid $11,880.72, but only $8,967.73 of it reduced principal — the rest ($2,912.99) was interest — so you still owe $16,032.27 with 36 payments left.
$200,000 at 6% for 30 years, 10 years in
After 120 payments of $1,199.10 on a 30-year loan, the balance is still $167,371 — only about 16% of the principal is repaid, because $111,264 of the first ten years of payments went to interest.
$35,000 car loan at 5.5% for 84 months, 50 payments made
A seven-year $35,000 auto loan at 5.5% has a $502.95 payment. After 50 payments $15,801.11 remains, which is the figure to compare with the car’s trade-in value.
Frequently asked questions
How do I calculate my remaining loan balance?+
Use B = P(1+r)^k − M((1+r)^k − 1)/r, where P is the original amount, r the monthly rate, k the payments made and M the monthly payment. This calculator does it for you and also shows interest and principal paid so far.
Why is my loan balance going down so slowly?+
Interest is charged on the outstanding balance, which is largest at the start, so early payments are mostly interest. As the balance falls, more of each payment goes to principal and the balance drops faster.
Is the remaining balance the same as the payoff amount?+
Not exactly. The payoff amount also includes interest accrued since your last payment and any fees. Ask your lender for a payoff quote valid to a specific date before sending a final payment.
How do extra payments change my balance?+
Extra principal payments reduce the balance immediately, cut future interest and shorten the loan. This calculator assumes no extra payments; use a loan payoff calculator to model them.
What if my interest rate changed during the loan?+
The formula assumes a fixed rate. For a variable-rate loan, check your latest statement for the current balance and enter that as a new loan with the current rate and remaining term.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.