28/07/2020 · Calculating the Monthly Payment of an Installment Loan. The calculation of an installment loan’s monthly payment can be done through a simple mathematical formula that requires basic data. Monthly Payment = P ( r (1+r) n ) ( (1+r) n-1 ) Where: P = the amount of the loan. r = the applicable interest rate. n = the number of annuity factor itself is calculated as: AF = (1 – (1+r)-n) ÷ r. Where: r = interest rate per period = (5%) n = number of periods = 4 (years) Applying the formula: AF = (1 – ) ÷ = Now, the equated annual instalment is given by: Instalment = Principal ÷ annuity factor = £10m ÷ = £ TOTAL PRINCIPAL REPAYMENTS27/08/2021 · When they want to calculate the interest on a loan, many people consider the difference in price for cash and installment payments and then divide this number by the number of installments. Although it is simple, the account does not bring the correct result. Let’s take an ;· An installment payment, such as that paid monthly on a loan, is paid out to the lender with interest charges and finance fees also included. Typically, monthly installment loans are for larger purchases like appliances, cars, or other large asset purchases. The payments are calculated using the Equal Monthly Installment (EMI) Ways to Calculate an Installment Loan Payment - wikiHowLoan Repayment Calculator | Step by Step ExamplesHow to calculate loan payments in 3 easy stepsHow to calculate loan payments in 3 easy steps