how does ordinary annuity differ from annuity due 
an ordinary annuity is a series of equal payments made at the end of consecutive periods over a fixed length of time an example of an ordinary annuity includes loans such as mortgages the payment for an annuity due is made at the beginning of each period a common example of an annuity due payment is rent this variance in when the payments are made results in different present and future value calculations 5