DEFINITION of 'Present Value Of An Annuity'
The current value of a set of cash flows in the future, given a specified rate of return or discount rate. The future cash flows of the annuity are discounted at the discount rate, and the higher the discount rate, the lower the present value of the annuity.
C = Cash flow per period
i = Interest rate
n = Number of payments
This calculates the present value of an ordinary annuity. To calculate the present value of an annuity due, multiply the result by (1+i). (The payments start at time zero instead of one period into the future.)
INVESTOPEDIA EXPLAINS 'Present Value Of An Annuity'
The essence of this concept is that receiving money now is worth more than receiving the same amount in the future. By the same logic, receiving $5,000 today is worth more than getting $1,000 per year for five years. This is because if you got the lump sum today, you could invest it and receive an additional return.
Using this example, and assuming a discount rate of 6%, the present value of an annuity that pays $1,000 per year for five years is $4,212 (1,000*[1(1+0.06)^{5}/0.06]= 4,212). This means that if you could get a return on your invested funds of 6% per year, receiving $4,212 today would have the same value to you as receiving $1,000 per year for five years.

Annuity
A financial product that pays out a fixed stream of payments ... 
Discount Rate
The interest rate charged to commercial banks and other depository ... 
Time Value of Money  TVM
The idea that money available at the present time is worth more ... 
Annuity Due
An annuity whose payment is to be made immediately, rather than ... 
Future Value  FV
The value of an asset or cash at a specified date in the future ... 
Present Value  PV
The current worth of a future sum of money or stream of cash ...

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