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Annuity vs. 401k: How Do They Compare?

5 min read Eterna Team

A 401(k) and an annuity are both retirement vehicles — but they work very differently and solve different problems. Understanding how they compare will help you decide whether an annuity belongs in your retirement strategy alongside your 401(k).

The Core Difference

A 401(k) helps you accumulate wealth for retirement. An annuity helps you turn that wealth into guaranteed income you can't outlive. They're not competitors — they're often complementary tools that work together.

💡 Think of your 401(k) as building the retirement savings pile — and an annuity as a way to guarantee that pile lasts for the rest of your life, no matter how long that is.

How a 401(k) Works

A 401(k) is an employer-sponsored retirement savings plan. You contribute pre-tax dollars from your paycheck, your employer may match a portion, and your money is invested in mutual funds or other market-based investments. Your balance grows tax-deferred until you withdraw in retirement, at which point withdrawals are taxed as ordinary income.

The 401(k) has no income guarantee — your balance depends entirely on how markets perform. A bad sequence of returns early in retirement can significantly reduce how long your money lasts.

How an Annuity Works

An annuity is a contract with an insurance company. You fund it with a lump sum or series of payments, it grows tax-deferred, and when you're ready you convert it to a guaranteed income stream that pays for the rest of your life — regardless of how markets perform or how long you live.

Side-by-Side Comparison

FeatureAnnuity401(k)
PurposeGuaranteed lifetime incomeWealth accumulation
Contribution LimitsNone$23,000/year (2024)
Employer MatchNoOften yes — free money
Market RiskNone (FIA) or full (variable)Full market exposure
Guaranteed IncomeYes — for lifeNo guarantee
Required DistributionsNoRMDs at age 73
Tax on WithdrawalOrdinary incomeOrdinary income
Death BenefitOften yesRemaining balance to heirs

Should You Use Both?

For most people, the answer is yes — in the right order:

  1. First — maximize your 401(k) contributions, especially if your employer matches. That's an immediate 50–100% return on your contribution.
  2. Then — once you've maxed out tax-advantaged accounts or you're approaching retirement, consider using an annuity to convert a portion of your savings into guaranteed lifetime income.

Many financial planners recommend covering your essential monthly expenses — housing, food, healthcare — with guaranteed income sources like Social Security and an annuity, then using your 401(k) for discretionary spending and legacy planning.

What About Self-Employed or Business Owners?

If you don't have access to an employer 401(k), an annuity becomes even more valuable. It can serve as your primary retirement income vehicle — giving you the same kind of pension-like guaranteed income that traditional employees get through their employer plans.


Want to know how an annuity could complement your existing retirement savings? Our licensed agents will look at your complete picture and show you exactly how guaranteed income could fit into your strategy.

Let's Build Your Retirement Income Strategy.

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