Identify the calculation method
A loan quote should say how interest is calculated. With a reducing-balance loan, interest is charged on the remaining principal. With a flat-rate quote, the lender may calculate interest using the original principal throughout the term. The same stated percentage can produce different costs under those methods.
Our calculator models a fixed annual nominal rate on a reducing balance with equal monthly repayments. It divides the annual percentage by twelve to obtain the monthly rate. It is not an APR calculation and does not convert a flat-rate offer into a reducing-balance rate. Ask the lender for the actual repayment schedule if the method is unclear.
Use the total as well as the monthly figure
A longer term may lower each monthly instalment while increasing the total interest paid. Keep the borrowed amount the same and compare the term, monthly payment, total interest and upfront fees. Fees entered here are paid separately rather than financed into the loan.
- Principal actually received and principal to be repaid
- Interest method and whether the rate can change
- Number and timing of payments
- Upfront charges, insurance charges and ongoing fees
- Early repayment terms, late fees and any final balloon payment
Read the assumptions
The estimate excludes missed payments, variable interest, grace periods, balloon payments, compulsory insurance and tax unless you explicitly include a known fee. If a fee is deducted from disbursement, the money you receive will be smaller than the stated principal. Compare that separately.
The calculator cannot assess affordability, eligibility or whether a loan is appropriate for you. A borrowing decision needs the lender's written terms and your own circumstances. Treat these numbers as a way to check the arithmetic and prepare questions, not as an approval or recommendation.
Sources & further checking
General information, not financial advice. Calculators use stated assumptions; confirm current terms with the source or provider.