Future value of annuity payment formula
This is the formula for determining the future value of an annuity: P = PMT x (((1 + r) ^ n – 1) / r) Here is what the variables represent: P = the future value of the annuity. PMT = the value of each annuity payment. r = the interest rate. n = the number of periods over which payments will be made. Future value of annuity = $125,000 x (((1 + 0.08) ^ 5 - 1) / 0.08) = $733,325 This formula is for the future value of an ordinary annuity, which is when payments are made at the end of the period in question. With an annuity due, the payments are made at the beginning of the period in question. The formula for calculating the future value of an ordinary annuity (where a series of equal payments are made at the end of each of multiple periods) is: P = PMT [((1 + r)n - 1) / r]