Personal Loan Payment Calculator

What this tool does

Use this personal loan payment calculator to estimate a fixed monthly payment from the loan amount, annual percentage rate and repayment term. The calculator also shows the estimated total interest and total amount repaid. You can optionally add an extra monthly payment to estimate an earlier payoff date and potential interest savings.

This calculator uses a standard fixed-rate amortization formula. Actual lender offers can differ because of origination fees, late fees, insurance, rate changes, payment timing, rounding and other terms. Treat the result as a planning estimate rather than a quote or approval decision.

Useful for

• Estimate the monthly payment for a fixed-rate personal loan.
• Compare how different interest rates or repayment terms affect the payment and total interest.
• Estimate the impact of paying an additional amount each month.
• Plan a budget before comparing actual lender offers and disclosures.

How to use it

1. Enter the amount you plan to borrow.
2. Enter the annual interest rate or APR used for the estimate.
3. Choose whether the loan term is entered in years or months and enter the term.
4. Optionally enter an extra amount you could pay each month, then select Calculate payment.

Worked examples

Common mistakes to avoid

• Comparing only the monthly payment while ignoring the total interest paid over the full term.
• Entering a monthly interest rate in a field that expects an annual percentage rate.
• Assuming the calculator includes origination fees, optional insurance, late fees or other lender charges.
• Choosing a longer term only because the monthly payment is lower, without checking the higher total borrowing cost.

Before you use the result

• Compare the estimated payment with the lender disclosure before accepting any loan.
• Check whether the stated APR includes fees that are not represented by the simple rate entered here.
• Confirm whether extra payments are applied directly to principal and whether any prepayment penalty applies.
• Review the total repayment amount, not only the advertised monthly payment.

Edge cases and limitations

• A 0% rate uses simple principal divided by the number of payments.
• Variable-rate loans cannot be modeled accurately with a single fixed annual rate.
• Loans with balloon payments, irregular schedules or deferred interest need a different calculation method.
• Very small final balances can create a shorter last payment because real lenders round each scheduled payment.

Practical tips

• Try several rates and terms to understand how much the total borrowing cost can change.
• Use the lender APR and fee disclosures when available rather than relying only on an advertised interest rate.
• Keep an emergency buffer in your budget instead of committing every available dollar to a loan payment.
• When comparing offers, consider payment amount, total repayment, fees, repayment flexibility and lender terms together.

Frequently asked questions