The interest rate on a loan is calculated based on the nominal interest rate, and the annual interest rate shows how much the loan will cost you if you pay interest on other payments on time. You can see the procedure for calculating the actual annual interest rate below.
The annual interest rate is calculated using the following formula:
- i - annual percentage rate (APR)
- A - the loan amount (the initial amount of the loan provided by the lender to the consumer)
- n - the number of payments to repay the loan
- N - the number of the last loan payment
- Kn - the amount of the n-th loan payment
- Dn - the period from the date of issuance of the loan to the day of payment of the n-th loan payment, expressed in the number of days
More details can be found at this link: 8/01