The effective interest method is a method of calculating the amortised cost of a financial asset or a financial liability (or a group of financial assets or financial liabilities) and of allocating the interest income or interest expense over the relevant period. The effective interest rate is the rate that exactly discounts estimated future cash payments or receipts through the expected life of the financial instrument or, when appropriate, a shorter period, to the carrying amount of the financial asset or financial liability. The effective interest rate is determined on the basis of the carrying amount of the financial asset or liability at initial recognition. Under the effective interest method:
(a) the amortised cost of a financial asset (liability) is the present value of future cash receipts (payments) discounted at the effective interest rate, and
(b) the interest expense (income) in a period equals the carrying amount of the financial liability (asset) at the beginning of a period multiplied by the effective interest rate for the period.