The regular payment has two jobs
A reducing-balance payment first covers that period’s interest, then reduces principal. Early in a schedule the outstanding balance is larger, so more of the same regular payment goes toward interest. Later, the principal share normally increases.
The loan payment calculator uses a fixed nominal annual rate divided into monthly rates and payments at the end of each month. These assumptions should match the scenario before you compare its result with a quotation.
Nominal interest and APR answer different questions
A nominal accrual rate determines interest under a stated frequency. A disclosed APR may incorporate fees or follow another jurisdiction’s calculation rules. Entering an APR in a nominal-rate formula does not recreate every charge on a real agreement.
Keep the quoted nominal rate, upfront charges, insurance and other costs separate when checking a loan offer. This calculator deliberately leaves those additional amounts out rather than guessing how they are financed or allocated.
Why the last payment can change
Currency amounts usually require a finite payment precision. The theoretical annuity amount may have many decimals, so the tool rounds the regular payment and each month’s interest to cents. The remaining balance then determines the final payment.
For 100 borrowed at 0% over three months, three payments of 33.33 would leave 0.01 unpaid. The schedule therefore ends with 33.34. For 10,000 at 6% over 36 months, its rounding policy produces 35 payments of 304.22 and a last payment of 304.18.
Compare complete scenarios
A smaller monthly payment can result from a longer term, which may increase total interest. Compare principal, term, total paid and the schedule together instead of ranking options by the headline payment alone. The tool makes no affordability decision and does not supply borrowing advice.
For the reverse direction of recurring deposits building a balance, use the compound interest calculator. For a simple relative change between two quoted amounts, use the percentage calculator.