Annuities are designed to provide a steady cash flow for people during their retirement years and to alleviate the fears of outliving their assets. Since these assets may not be enough to sustain their standard of living, some investors may turn to an insurance company or other financial institution to purchase an annuity contract.

As such, these financial products are appropriate for investors, who are referred to as annuitants, who want stable, guaranteed retirement income. Because invested cash is illiquid and subject to withdrawal penalties, it is not recommended for younger individuals or for those with liquidity needs to use this financial product.

An annuity goes through several different phases and periods. These are called:

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The Accumulation Phase, the period of time when an annuity is being funded and before payouts begin. Any money invested in the annuity grows on a tax-deferred basis during this stage.

The Annuitization Phase, which kicks in once payments commence.

These financial products can be immediate or deferred. Immediate annuities are often purchased by people of any age who have received a large lump sum of money, such as a settlement or lottery win, and who prefer to exchange it for cash flows into the future. Deferred annuities are structured to grow on a tax-deferred basis and provide annuitants with guaranteed income that begins on a date they specify.