You might want to calculate the present value of the annuity, to see how much it is worth today. The interest rate can be based on the current amount being obtained through other investments, the corporate cost of capital, or some other measure. https://www.bookstime.com/ An annuity is a series of payments that occur at the same intervals and in the same amounts. An example of an annuity is a series of payments from the buyer of an asset to the seller, where the buyer promises to make a series of regular payments.