Remaining Loan Balance Calculator
Assumes payments at the end of each monthly interest period.
Balance is updated monthly: balance × (1 + rate/12) − payment
Estimate remaining principal after a number of equal payments on a fixed-rate loan.
Formula
Balance is updated monthly: balance × (1 + rate/12) − payment
Worked example
Starting loan principal: 10000
Annual rate: 6 %
Monthly payment: 350
Payments already made: 12
With these inputs, the result is **6,299.33129 **. Assumes payments at the end of each monthly interest period.
How to use this calculator
- Identify the quantity you want to calculate.
- Enter your measurements in the units shown on each field.
- Read the result, which updates as you change the inputs.
- Check the assumptions below before applying the result.
Assumptions and limits
Fees, daily-interest methods, missed payments, rate changes, and partial-period adjustments are excluded.
Precision and checking
Results are rounded for display. Use the most accurate measurements available, and avoid rounding your inputs unnecessarily. Extra decimal places in a result do not make an estimate more reliable.
To check a result, substitute the same input values into the formula shown above. Change one value at a time to understand how the quantity responds.
Frequently asked questions
What assumptions does this calculation use?
Fees, daily-interest methods, missed payments, rate changes, and partial-period adjustments are excluded.
Are my inputs sent to a server?
No. The calculation runs locally in your browser. The result updates as you edit the inputs.
Sources & references
- How mortgage lenders calculate monthly payments — Consumer Financial Protection Bureau
