An annuity contract is when an insurance company makes a series of income payments at regular intervals in return for a premium or premiums you have paid. Annuities are most often bought for future retirement income.
Only an annuity can pay an income that can be guaranteed to last as long as you live.

An Annuity is neither a life insurance nor a health insurance policy. It's not a savings account or a savings certificate. You shouldn't buy an annuity to reach short-term financial goals.

Your value in an annuity contract is the premiums you've paid, less any applicable charges, plus interest credited. The insurance company uses the value to figure the amount of most of the benefits that you can choose to receive from an annuity contract. This guide explains how interest is credited as well as some typical charges and benefits of annuity contracts.

A deferred annuity has two parts or periods. During the accumulation period, the money you put into the annuity, less any applicable charges, earns interest. The earnings grow tax-deferred as long as you leave them in the annuity. During the second period, called the payout period, the company pays income to you or to someone you choose.

Single Premium or Multiple Premium

You pay the insurance company only one payment for a single premium annuity. You make a series of payments for a multiple premium annuity. There are two kinds of multiple premium annuities. One kind is a flexible premium contract. Within set limits, you pay as much premium as you want, whenever you want. In the other kind, a scheduled premium annuity, the contract spells out your payments and how often you’ll make them.

With an immediate annuity, income payments start no later than one year after you pay the premium. You usually pay for an immediate annuity with one payment.

The income payments from a deferred annuity often start many years later. Deferred annuities have an accumulation period, which is the time between when you start paying premiums and when income payments start.

Fixed
During the accumulation period of a fixed deferred annuity, your money (less any applicable charges) earns interest at rates set by the insurance company or in a way spelled out in the annuity contract. The company guarantees that it will pay no less than a minimum rate of interest. During the payout period, the amount of each income payment to you is generally set when the payments start and will not change.

Variable
During the accumulation period of a variable annuity, the insurance company puts your premiums (less any applicable charges) into a separate account. You decide how the company will invest those premiums, depending on how much risk you want to take. You may put your premium into a stock, bond or other account, with no guarantees, or into a fixed account, with a minimum guaranteed interest. During the payout period of a variable annuity, the amount of each income payment to you may be fixed (set at the beginning) or variable (changing with the value of the investments in the separate account).