Economic Definition of annuity. Defined.
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Term annuity Definition: The receipt of payments at regular intervals from a established fund. Annuities are commonly used for insurance and retirement programs. It works in this way: A fund, which can be established either through a one-time sum of money or a series of payments, is exhausted over time with fixed, periodic payments. The amount of each payment depends on the interest accrued on the outstanding balance in the fund, and the length of time scheduled to exhaust the fund. For example, if your pension plan is based on an annuity that begins payments at the age of 65, then the size of the payments depends on whether you expect to live 5, 10, 15, or more years and set up payments accordingly. It's very similar to amortization, but in the reverse direction.