Annuities Explained: How They Work, the Main Types, and Whether One Fits Your Retirement Plan

 

Retirement planning comes down to one uncomfortable question: what happens if your money runs out before you do? Savings accounts, investments, and pensions all help, but none of them promise income for as long as you live. An annuity is the one insurance product built to make exactly that promise — you hand an insurer a lump sum, and in return it pays you a regular income, often for life.

Annuities have a mixed reputation, and some of it is earned: the wrong type, bought for the wrong reason, can be expensive and hard to exit. But the right type, bought for the right reason, can turn a retirement pot into a paycheck you never have to manage. This guide explains annuities in plain English: how they work, the main types, what they cost, the payout choices that matter most, and who should — and should not — buy one.

What Is an Annuity, in Plain English?

An annuity is a contract with an insurance company. You pay a premium — usually one lump sum, sometimes a series of payments — and the insurer agrees to pay you back as income, either starting immediately or at a future date you choose.

Every annuity has two phases:

• Accumulation phase: your money grows (or sits) inside the contract before income starts. This applies mainly to deferred annuities.
• Payout phase: the insurer sends you regular payments — monthly is most common — for life, for a fixed number of years, or both.

Think of it as buying your own private pension. Social Security and a workplace pension already work this way: you (and your employer) paid in during your working years, and now you receive income for life. An annuity lets you build the same structure with your own savings.

The Two Big Questions That Define Every Annuity

Annuities come in many varieties, but they all differ on just two questions:

1. When does income start? Immediately, or years from now?
2. How is your money invested while it waits? At a guaranteed rate, in the market, or linked to an index?

Answer those two questions and you have identified the type. Here are the five main ones.

The Five Main Types of Annuities

Type	How It Works	Risk Level	Best For
Immediate (SPIA)	Lump sum in, monthly income out — payments start within a year, usually within 30 days	Low	Retirees who need income now
Fixed (MYGA)	Guaranteed interest rate for a set term, like a certificate of deposit	Low	Safe, predictable growth before retirement
Deferred income (DIA)	Pay now, income starts at a future date you pick, often 5–20 years out	Low	Planning income for later retirement years
Fixed indexed (FIA)	Returns linked to a market index, with a floor (usually 0%) and a cap on gains	Low to moderate	Some market upside without downside risk
Variable	Invested in subaccounts that work like mutual funds; returns follow the market	High	Long-horizon investors comfortable with losses

Immediate Annuities: A Paycheck You Cannot Outlive

The single premium immediate annuity (SPIA) is the simplest annuity and the easiest to understand. You pay once, and the insurer starts paying you every month for life. There are no moving parts, no investment choices, and typically no annual fees.

What does $100,000 actually buy? Based on October 2026 rate tables from major US carriers, a $100,000 SPIA with a single-life payout and a 5-year period certain pays about $693 a month for a 65-year-old man and $658 a month for a 65-year-old woman — roughly $8,300 and $7,900 a year, guaranteed for life. Older buyers get more (about $1,046 a month at age 80), and younger buyers get less (about $572 at age 55), because the insurer expects to make payments for fewer years. Women receive slightly less per month because, on average, they live longer.

The catch is permanence: once you buy a SPIA and payments begin, the contract is generally irrevocable. You cannot change your mind and take your lump sum back. That is why the golden rule of immediate annuities is to annuitize only money you will not need for emergencies — keep liquid reserves outside the annuity.

Fixed Annuities: The Safe, Boring Option

A fixed annuity, often sold as a multi-year guaranteed annuity (MYGA), works much like a bank certificate of deposit: the insurer guarantees a fixed interest rate for a set term. In 2026, MYGAs have been paying roughly 4.5–5.5% for 3–7 year terms. There are no explicit annual fees — the insurer earns its margin on the interest spread.

Fixed annuities suit people who want guaranteed growth with no market risk and no complexity. The trade-off is that your return is capped at the guaranteed rate, and inflation can quietly eat into it over a long term.

Fixed Indexed Annuities: Upside With a Floor

A fixed indexed annuity (FIA) links your interest credits to a market index, usually the S&P 500, but with two guardrails: a floor (usually 0%, so you never lose principal in a down year) and a cap (often around 7–9%) or a participation rate (often 50–80% of the index gain) that limits your upside.

In a strong market year, you might earn a capped portion of the gain. In a bad year, you earn zero — but you lose nothing. FIAs appeal to cautious savers who want some market participation without market losses. The complexity is the downside: crediting methods vary widely, returns are hard to predict, and the headline "market-linked" pitch often sounds better than the capped reality.

Variable Annuities: Growth Potential at a Real Price

Variable annuities invest your premium in subaccounts that work like mutual funds, so your value rises and falls with the market. They offer the highest growth potential — and the highest costs. Typical annual charges include mortality and expense fees (1–1.5%), administrative fees (0.1–0.3%), underlying fund fees (0.5–2% or more), and optional rider fees (0.5–1% each). On a fully featured variable annuity, total annual costs of 2–4% are common.

That fee load is the single biggest reason variable annuities draw criticism: a 3% annual drag, compounded over decades, can erase much of the market advantage. They can still make sense for investors who specifically want tax-deferred growth plus optional lifetime-income riders — but for most people, a low-cost investment account delivers similar market exposure far more cheaply. Always compare the all-in fee before signing.

Surrender Charges: The Lock-In You Must Understand

Most deferred annuities have a surrender period, typically 5–10 years, during which withdrawing more than a small free amount (usually 10% of the contract value per year) triggers a surrender charge. Charges often start at 7–10% in year one and decline by about 1% each year until they reach zero.

This is the feature that traps unwary buyers: an annuity is not a savings account you can raid at will. Before buying, ask three questions and get the answers in writing: How long is the surrender period? What are the charges each year? What is the free withdrawal allowance? If you might need the money within the surrender period, do not buy that contract.

Payout Options: The Choice You Cannot Undo

For an immediate annuity, the payout option decides what happens to your money if you die sooner than expected — and it is the one choice you cannot change later. Using the same $100,000 premium at age 65 as an example:

Payout Option	Monthly Income (approx.)	What Your Beneficiary Gets
Life only	About $700	Nothing — payments stop at death
Life + 10-year period certain	About $674	Payments continue to heirs for the rest of the 10 years
Life + cash refund	About $642	Premium minus payments already made, as a lump sum
Joint and survivor (100%)	About $608	Spouse keeps the full payment for life

Life only pays the most, because the insurer keeps whatever is left when you die. Every guarantee — a period certain, a refund, a spouse's income — costs a little monthly income. For couples, joint-and-survivor cover is usually worth the reduction: a life-only annuity that leaves a surviving spouse with nothing is a common and painful mistake.

Taxes and Safety Nets

Annuity growth is tax-deferred until you take money out, which is one of their genuine advantages. How withdrawals are taxed depends on how you funded the contract:

• Non-qualified annuities (bought with after-tax money): only the earnings portion of each payment is taxable; the return of your own principal is tax-free.
• Qualified annuities (funded from an IRA or 401(k)): the entire payment is taxed as ordinary income, because the money was never taxed going in.
• Early withdrawals before age 59½ in the US can face a 10% IRS penalty on earnings, on top of ordinary income tax.

On safety: an annuity guarantee is only as strong as the insurer behind it. In the US, state guaranty associations backstop annuity benefits up to $250,000 of present value per owner, per insurer in most states — so a $100,000 contract sits comfortably inside the limit. Still, choose an insurer rated A or better by AM Best, and never put more than the guaranty limit with a single carrier. In the UK, annuities bought with a pension pot work similarly, with about £8,138 a year available from a £100,000 pot at age 65, and the open-market option lets you shop around rather than accepting your pension provider's quote.

Who Should — and Should Not — Buy an Annuity?

An annuity may fit if you:

• Are retired or near retirement and want guaranteed income to cover essential bills, alongside Social Security or a pension.
• Worry about outliving your savings — longevity is the one risk an annuity truly eliminates.
• Have money you will not need as a lump sum, and adequate liquid savings outside the annuity.
• Value certainty over flexibility, and will not need to raid the contract during its surrender period.

An annuity probably does not fit if you:

• Are in poor health — lifetime income is priced on average life expectancy, so a shorter expected lifespan means poor value.
• Might need the lump sum back for emergencies, care costs, or helping family.
• Want your money to keep pace with inflation without paying extra — a level annuity loses real value every year unless you buy an inflation-linked option, which starts lower.
• Are being sold a complex variable annuity mainly for "tax deferral" when cheaper tax-advantaged accounts are still available to you.

How to Shop for an Annuity Without Getting Burned

1. Get at least three quotes. For the same $100,000 contract at 65, the lowest-paying of eight major carriers pays about 17% less per month than the best — shopping around is worth thousands over a lifetime.
2. Ask for the all-in annual fee in writing, including every rider — especially on variable and indexed contracts.
3. Read the surrender schedule before signing, not after. Know the period, the charges, and the free withdrawal allowance.
4. Check the insurer's financial strength rating (AM Best A or better) and keep any single contract within your state guaranty limit.
5. Ask how the salesperson is paid. Annuity commissions can be large, and they are built into the product's pricing. An independent adviser who compares multiple carriers is usually a better guide than a captive agent selling one company's product.
6. Annuitize only part of your savings. Many planners suggest covering essential expenses with guaranteed income and keeping the rest invested and liquid — the best of both worlds.

The Bottom Line

Annuities are neither the miracle retirement product their sales pitches claim nor the trap their critics describe. They are insurance against one specific risk: living longer than your money. A simple immediate annuity turns a lump sum into a paycheck for life at a price that, for a healthy buyer who shops around, is close to fair. A fixed annuity offers safe, guaranteed growth. Indexed and variable versions add complexity and cost that must be justified, not assumed.

The expensive mistakes are all avoidable: buying a contract you cannot exit, paying 3% a year in fees you never tallied, choosing life-only cover when a spouse depends on the income, or annuitizing money you will need back. Get the type right, get the payout option right, compare quotes, and an annuity can do something no investment account can — guarantee that the paycheck keeps coming no matter how long you live. This guide is educational only and does not replace professional financial advice.