How do you calculate amount of interest in Finance lease?

To calculate the amount of interest in a finance lease, first identify the total lease payments and the present value of the lease liability. The interest expense can be determined by applying the interest rate to the outstanding balance of the lease liability at the beginning of each period. Typically, the interest for the period is calculated as the outstanding principal at the start of that period multiplied by the interest rate, and this amount is deducted from the lease payments to find the principal repayment for that period.