When to Buy an Annuity (and When Not To)

Annuities solve a real problem: the risk of outliving your money. In exchange for a lump sum, an insurance company agrees to pay you a monthly income for life — guaranteed, no matter how long you live. But annuities come in many forms, some of which are genuinely useful and some of which are expensive and complicated in ways that benefit the seller more than the buyer. Understanding the difference is the first step to deciding whether one belongs in your retirement plan.

What an Annuity Actually Does

At its core, an annuity is a contract between you and an insurance company. You pay in a sum of money. The insurer invests it and agrees to pay you income — either immediately or at some future date — for a set period or for the rest of your life. The key feature that distinguishes an annuity from any other investment is the longevity guarantee: the income continues even if you live to 100 and have far outlasted any reasonable projection of what your original premium could support.

This guarantee is worth something real. It eliminates what financial planners call longevity risk — the chance that you outlive your assets. For someone in good health with family history of long life, that risk is not theoretical.

The Main Types of Annuities

Immediate annuities (SPIAs)

A single premium immediate annuity (SPIA) is the simplest form. You hand over a lump sum and income payments start within a month or year. The payout rate is locked in at purchase based on your age, the current interest rate environment, and which payment option you choose (lifetime only, joint and survivor, period certain, etc.). There are no fees in the traditional sense — the insurer earns its margin by investing your premium and paying you less than it expects to earn over your lifetime.

SPIAs are transparent, straightforward, and useful. They are the annuity type most financial planners are willing to recommend without heavy qualification.

Deferred income annuities (DIAs / longevity annuities)

A deferred income annuity works like a SPIA purchased today with income starting years in the future — say, at 80 or 85. Because the insurer has decades to invest your premium before paying it out, you get a much higher payout rate per dollar than an immediate annuity. The trade-off: if you die before income starts, the premium is typically lost (though some contracts offer a return-of-premium death benefit).

A longevity annuity used as a backstop — purchased in your 60s to guarantee income starting at 80 — can actually lower your withdrawal rate from your portfolio in your 60s and 70s, because you no longer need to plan for the worst-case longevity scenario. The QLAC (qualified longevity annuity contract), a type of DIA held inside an IRA, also has the advantage of reducing your RMD calculation base.

Variable annuities

Variable annuities combine insurance with investment accounts (subaccounts) that function like mutual funds. The account value fluctuates with market performance. Many variable annuities include optional riders — guaranteed minimum withdrawal benefits (GMWBs), guaranteed minimum income benefits (GMIBs) — that add a floor under your income regardless of market performance.

The problem with variable annuities is cost. Annual expense ratios on the underlying subaccounts typically run 0.5–1%, plus mortality and expense charges of 1–1.5%, plus rider fees of another 0.5–1.5%. Total annual costs of 2.5–4% are common. These fees are charged every year against the account value, which significantly erodes the long-term growth potential that is supposed to justify holding the annuity in the first place.

Fixed indexed annuities

Fixed indexed annuities (FIAs) credit interest based on the performance of a market index like the S&P 500, subject to caps, floors, and participation rates set by the insurer. Your principal is protected against loss, but your upside is also capped — often at 5–10% per year even in years when the index returns 20–25%.

FIAs are heavily sold products with high commissions. The complexity of their crediting methods makes them difficult to evaluate independently. They are not inherently bad, but they are rarely the best option for someone seeking either pure income protection or pure growth.

When an Annuity Makes Sense

Annuities solve a specific problem. They make the most sense when one or more of these conditions applies:

Your guaranteed income does not cover your essential expenses. If Social Security and any pension do not fully cover housing, healthcare, and food, an annuity can fill that gap with guaranteed income — giving you a floor to live on without portfolio-withdrawal anxiety.
You have family history of long life. Annuities are better deals for people who live a long time. If your parents lived into their 90s and you are in good health, the longevity insurance has real actuarial value.
You are genuinely worried about outliving your money. For some people, the psychological value of guaranteed income — not having to watch the market every month — is worth paying for. That is a legitimate reason.
You are using a deferred income annuity as a longevity backstop. A relatively small QLAC or DIA purchased in your 60s to cover income from 80–85 onward can be efficient and meaningful.

When an Annuity Does Not Make Sense

You have substantial guaranteed income already. If Social Security plus a pension already covers your essential expenses, you may not need another guaranteed income stream. Adding one trades liquidity for income you do not need.
You have significant health problems. Annuity pricing assumes average life expectancy. If you are likely to have a shorter-than-average life, the longevity guarantee that makes annuities valuable is worth less to you.
You have heirs who need the assets. Lifetime-only annuities die with you — nothing passes to beneficiaries. If leaving money to children or a surviving spouse is a priority, a lifetime-only annuity conflicts with that goal. (Joint and survivor options help with spouses but typically at a lower monthly payout.)
You cannot afford the illiquidity. Most annuities have surrender periods of 5–10 years during which you pay substantial charges to exit early. If you might need this money for an unexpected expense, locking it into an annuity is a risk.
The annuity is complex and expensive. If you cannot clearly explain how the annuity works and what it costs in total, that is a warning sign. Variable annuities with stacked riders frequently cost 3–4% per year — a significant hurdle that requires exceptional growth or long life to overcome.

A Practical Framework

Think of guaranteed income as a floor and your portfolio as a ceiling. The goal is to build enough floor to cover the non-negotiable — housing, food, healthcare, utilities — so your portfolio only needs to support the discretionary. Social Security is typically the first layer. A pension is the second. An annuity is a third layer you buy when the first two are not enough.

If you are considering an annuity, start with a SPIA or a QLAC rather than a variable or indexed product. They are simpler, cheaper, and easier to evaluate. Get quotes from multiple insurers — payout rates vary meaningfully — and compare them against what you could earn by simply drawing down your portfolio at 4%.

If someone is pushing you toward a variable annuity with multiple riders inside a tax-advantaged account like a Roth IRA or 401(k), be skeptical. The tax deferral that annuities provide inside a taxable account is already present in an IRA or 401(k) — you are paying for a benefit you already have.

When to Buy an Annuity (and When Not To)

What an Annuity Actually Does