Quick answer: An in-plan annuity is an insurance contract wrapped inside your 401(k) menu — either as a guaranteed-income overlay on a target-date fund, a standalone fixed or deferred annuity, or a qualified longevity annuity contract (QLAC). It can convert part of your balance into income you cannot outlive, but the guarantee is priced through rider fees, surrender schedules, and an insurer’s claims-paying ability, not through FDIC or PBGC protection. Before allocating a dollar to one, read the annuity’s specimen contract for the rider fee, the income-base reset rules, the surrender or market-value-adjustment schedule, and what happens to your guarantee if your employer removes the option from the plan.
The Decision Framework: Should You Put 401(k) Dollars Into an Annuity?
Plan sponsors have added lifetime-income features to 401(k) menus at a growing clip since the SECURE Act of 2019 gave fiduciaries a defined legal safe harbor for picking an insurer, and SECURE 2.0 widened the tax rules around longevity annuities in 2022 and after. If your plan now shows an option with a name like “Lifetime Income Builder,” “IncomeFlex,” “Retirement Income Fund,” or “Guaranteed Withdrawal Benefit,” you are looking at one of a handful of annuity structures dressed up as a 401(k) investment choice. The decision of whether to use it is really three smaller decisions stacked together.
First, decide whether you have an actual longevity-risk problem worth insuring. If a pension, a delayed Social Security claim, or a large taxable portfolio already covers your fixed costs for life, an in-plan annuity mostly adds cost without adding much protection. Second, decide whether the specific structure on your menu matches the risk you are trying to solve — a guaranteed lifetime withdrawal benefit (GLWB) protects against running out of money while staying liquid, while a QLAC protects specifically against living past your own planning horizon, in exchange for giving up access to that money for years. Third, decide whether the price of the guarantee, once you strip out the marketing language, is one you would pay if you saw it quoted as a flat annual fee on a bill.
Work through those three questions in order. Skipping to “what’s the payout rate” before you’ve answered “do I need this at all” is how people end up over-insured and under-invested in growth assets they still needed for the first fifteen years of retirement.
When an in-plan annuity tends to earn its cost
- You are within about ten years of drawing income and have no defined-benefit pension.
- You are risk-averse enough that market drops in retirement would trigger panic selling without a guaranteed floor.
- Family longevity, health history, or a spouse’s much younger age point to a retirement that could run 30-plus years.
- You want to delay claiming Social Security but need a bridge income source that will not run dry if you delay past 70.
When it usually does not
- You already hold a pension, deferred comp, or rental income stream that covers non-discretionary spending.
- You are more than 15 years from retirement and the growth drag from rider fees will compound for a long time.
- Your plan balance is modest and the guarantee minimums (often $10,000–$25,000 to activate a rider) would concentrate too much of your account in one product.
- You expect to change employers soon and your plan’s portability terms for the annuity are unclear or unfavorable.
Evaluation Criteria: What “Reading the Fine Print” Actually Means
Every in-plan annuity disclosure buries the same handful of numbers in different places. Once you know where to look, comparing two products takes fifteen minutes instead of an afternoon.
1. The rider fee and what it is charged against
A GLWB or GMWB rider fee is usually 0.85% to 1.35% per year, charged not against your market value but against a separate bookkeeping figure called the “benefit base” or “income base.” That base can be higher than your actual account balance after a market downturn, which means the fee percentage is applied to a bigger number than the balance you’d see if you cashed out. Always ask for the fee expressed both as a percentage of the benefit base and as a dollar estimate against your current balance.
2. How the income base grows — and how it doesn’t
Most riders offer a “step-up” or “ratchet” that locks in market gains on specific anniversary dates, plus sometimes a guaranteed minimum roll-up (commonly 4%–6% simple, not compounded) during years you don’t take withdrawals. Read the contract for whether step-ups continue after you start withdrawing — many stop crediting further growth to the income base the moment you take your first distribution.
3. Portability if the plan drops the option
The SECURE Act added a specific protection here: if a plan sponsor removes a lifetime-income investment from the menu, participants generally get a 90-day window to execute a direct rollover of that annuity investment to an IRA or another employer plan without triggering a distributable event under the plan’s normal rules. That protects your guarantee from being stripped away by a menu change, but only if you act inside the window and only if a receiving IRA custodian will actually accept an in-kind annuity contract — not all of them will.
4. Surrender charges, market-value adjustments, and liquidity
Fixed and fixed-indexed annuity options used as 401(k) menu choices often carry a declining surrender-charge schedule (commonly 5 to 10 years, starting around 6%–9% and declining to zero) and sometimes a market-value adjustment that can reduce your payout further if interest rates have risen since you invested. Confirm whether the plan-level “book value” wrapper waives surrender charges for in-service withdrawals, loans, or hardship distributions, since some plan-level group contracts do while individually sold annuities almost never do.
5. Who is actually backing the guarantee
The promise behind any annuity is only as solid as the issuing insurer’s balance sheet. There is no FDIC insurance and no PBGC backstop. Each state runs its own guaranty association with per-contract coverage limits that typically fall in the $250,000–$500,000 range for annuity benefits, and those limits vary by state and do not stack across insurers if you’re diversified. Check the insurer’s financial-strength ratings and confirm the fiduciary due-diligence file your plan sponsor is required to keep under the ERISA Section 404(e) safe harbor.
6. Tax treatment and required minimum distribution mechanics
Growth inside an in-plan annuity is taxed the same as any other 401(k) money — ordinary income on withdrawal, no capital-gains treatment. A qualified longevity annuity contract (QLAC) gets one special carve-out: the premium used to buy it is excluded from the account balance used to calculate required minimum distributions until income payments actually begin, up to the IRS’s indexed dollar cap (raised to $200,000 by SECURE 2.0 in 2023 and adjusted upward in $10,000 increments since, reaching $210,000 for 2025 — confirm the current-year figure before committing, since it resets annually).
Options Comparison: The Four Shapes an In-Plan Annuity Takes
Not every “annuity” on a 401(k) menu behaves the same way. Here is how the four structures you’re likely to encounter actually compare on the dimensions that matter.
| Structure | How income is created | Liquidity while accumulating | Typical annual cost load | Fits best when |
|---|---|---|---|---|
| GLWB rider on a target-date fund | Guarantees a lifetime withdrawal rate (often 4%–6%) against a benefit base that can step up with markets | High — you still own the underlying fund shares | Fund fee (0.10%–0.45%) + rider fee (0.85%–1.35%) | You want a floor but don’t want to lock money away |
| In-plan fixed/fixed-indexed annuity | Credits a declared or indexed rate; converts to income only if and when you elect annuitization | Moderate — surrender schedule usually applies outside the plan wrapper | Spread built into the credited rate; not shown as a line-item fee | You want principal stability as a bond substitute, income optional |
| QLAC (deferred income annuity) | Pays a large, fixed monthly income starting at a chosen future age (up to 85) | None — premium is generally illiquid once purchased | No visible fee; priced into the guaranteed payout rate | You want to insure against outliving your money at advanced ages and reduce near-term RMDs |
| Immediate annuity via retirement “income marketplace” | Converts a lump sum to income immediately at distribution, chosen from competing insurer quotes | None once purchased — it’s a distribution decision, not an accumulation holding | Priced into the quoted payout rate; compare across carriers | You’re at the retirement finish line and want a piece of guaranteed income now |
Fee Load, Side by Side: Where the Cost Actually Sits
The chart below breaks down the two structures that show a visible expense ratio — a plain low-cost target-date fund and a target-date fund wrapped in a GLWB rider — against a baseline of what a cost-conscious index investor typically pays. Bars are scaled to a 1.50% maximum; the dashed line marks a 0.50% baseline, a reasonable all-in cost for a diversified, unwrapped target-date fund.
Guarantee / rider fee
0.50% baseline
The rider almost quadruples the all-in cost versus a plain target-date fund. That is not automatically a bad trade — you are buying a lifetime income floor, not just index exposure — but it should be a trade you make on purpose, with the number in front of you, rather than one you discover by comparing statements five years later.
Worked Example: Dana, Age 58, Deciding Between Two Structures
Dana has $500,000 in a 401(k) and is deciding whether to route $100,000 of it into the plan’s GLWB-wrapped target-date option or into the plan’s QLAC offering. This example uses illustrative, rounded figures — actual insurer quotes move with interest rates, sex-distinct or unisex pricing rules, and the specific contract, so treat the numbers as directional, not a quote.
Option A: GLWB rider, income starts at 65
Dana allocates $100,000 at 58. Assume modest net growth after fees brings the income base to roughly $115,000 by age 65 through a combination of market step-ups and a guaranteed 5% simple roll-up in years without withdrawals. A 5% lifetime withdrawal rate at age 65 on that base locks in about $5,750 per year for life, starting immediately at 65, while Dana keeps market exposure and the ability to take extra withdrawals (which would reduce the future base proportionally).
Option B: QLAC, income deferred to age 80
Dana instead uses $100,000 to buy a QLAC at 58 with income starting at 80 — a 22-year deferral. Deferred income annuities with this long a deferral period typically quote in the range of $16,000–$20,000 per year of guaranteed income per $100,000 of premium for this kind of deferral, reflecting mortality credits pooled across everyone who buys the contract. That $100,000 is also excluded from RMD calculations from age 58 until income starts at 80, provided it stays under the QLAC dollar cap.
Neither option is objectively better — they insure different risks. The GLWB gives Dana a smaller, earlier, liquid-adjacent floor with market upside still attached. The QLAC gives a much larger income stream, but only starting at 80 and only in exchange for permanently giving up access to that $100,000 at 58. A common approach among advisors is to split the allocation: a modest QLAC purchase to cover the “if I live past 85” tail risk, and a GLWB or flexible drawdown strategy for the years between retirement and the QLAC’s start date.
Common Mistakes People Make With In-Plan Annuities
Treating the “guaranteed” rate as the total return
A 5% guaranteed withdrawal rate is not a 5% guaranteed return on your money. It is a percentage applied to a benefit base that may exceed your real account value, and if you die early or surrender the contract, the insurer keeps the spread between what it collected in fees and what it paid out. The guarantee protects against longevity risk, not against the account underperforming a benchmark.
Ignoring what happens after the first withdrawal
Many riders freeze future step-ups the moment you take your first income payment. Retirees who take a partial withdrawal early “just to test it” sometimes lock in a lower benefit base than they would have had if they’d waited another year or two for a market step-up.
Assuming the annuity is portable on a job change
Rolling a 401(k) with an in-plan annuity into an IRA at a new employer or a new custodian is not automatic. Some receiving custodians refuse in-kind annuity transfers entirely, which forces a choice between surrendering the contract (often at a loss of accrued benefit-base growth) or leaving a small balance behind in the old plan just to keep the annuity intact.
Confusing state guaranty coverage with FDIC insurance
State guaranty associations exist, but coverage caps and rules differ by state, coverage is not advertised or guaranteed the way FDIC insurance is, and there’s no federal backstop equivalent to PBGC for annuity contracts. Concentrating a large share of retirement savings with a single insurer deserves the same scrutiny you’d give to concentrating it with a single stock.
Buying the rider and then not using the base plan’s diversification correctly
Because the GLWB fee is charged whether or not the market performs well, some savers respond by shifting the underlying investment to something more conservative “to protect the guarantee.” That usually backfires — it reduces the odds of future step-ups without reducing the fee, effectively locking in the worst of both worlds.
Skipping the QLAC’s death-benefit fine print
Some QLAC contracts offer a return-of-premium or period-certain death benefit if you die before or shortly after income starts; others do not, or charge for that feature by reducing the payout rate. If leaving money to heirs matters, confirm which version you’re buying before signing, not after.
Practical Checklist Before You Elect an In-Plan Annuity
- Request the actual specimen contract or certificate, not just the plan’s one-page summary sheet.
- Write down the rider fee, what it’s charged against, and whether it can increase.
- Confirm whether step-ups or roll-ups continue after your first withdrawal.
- Ask what happens to your guarantee if the plan replaces the recordkeeper or drops the investment option.
- Check the insurer’s financial-strength ratings from at least two independent rating agencies.
- Confirm whether your plan or an outside custodian will accept an in-kind rollover of the contract if you leave your employer.
- If considering a QLAC, confirm the current-year IRS dollar cap and whether the contract includes a death benefit.
- Model your household’s other guaranteed income (Social Security, any pension) before deciding how much more guarantee you actually need.
- Ask your plan’s fiduciary documentation (available on request in many plans) for how the insurer was vetted under the ERISA 404(e) safe harbor.
Longevity insurance is only one lever inside a broader 401(k) strategy, and it works best alongside the more familiar ones — contribution rate, asset allocation, and cost control. If you haven’t already mapped those out, our guide on protecting a 401(k) from inflation walks through the QLAC cap alongside eight other practical levers, including how Roth timing and target-date design interact with a guaranteed-income allocation.
Key Takeaways
- In-plan annuities generally take one of four shapes: a GLWB rider on a target-date fund, a standalone fixed or fixed-indexed annuity, a QLAC, or an immediate annuity purchased through a retirement-income marketplace at distribution.
- The SECURE Act’s fiduciary safe harbor (ERISA Section 404(e)) made it easier for plan sponsors to add these options, and its portability rule gives you a defined window to roll the contract out if the plan later drops it.
- Rider fees for lifetime withdrawal benefits typically run 0.85%–1.35% annually on top of the underlying fund’s expense ratio, charged against a benefit base that can exceed your real account value.
- QLACs exclude the premium from RMD calculations until income starts, up to an IRS dollar cap that is indexed annually and stood at $210,000 for 2025.
- None of these guarantees carry FDIC insurance or a PBGC-style federal backstop; protection runs through state guaranty associations with limits that vary by state.
- Read the specimen contract for what happens after your first withdrawal, what happens on a job change, and what death benefit (if any) applies before allocating a dollar.
Frequently Asked Questions
What exactly is an in-plan annuity in a 401(k)?
It’s an insurance product built into a 401(k) investment menu, typically structured as a guaranteed lifetime withdrawal benefit wrapped around a target-date fund, a standalone fixed or fixed-indexed annuity, or a qualified longevity annuity contract (QLAC). Instead of buying a separate annuity from an insurer on the open market, you elect it as an investment option inside your existing employer plan.
Are in-plan annuities safe if my employer’s plan provider goes out of business?
Your 401(k) assets, including annuity contracts, are held for the exclusive benefit of participants and are legally separate from the plan sponsor’s own creditors under ERISA. The annuity guarantee itself, however, depends on the issuing insurance company’s solvency, backed by state guaranty association limits rather than FDIC insurance or a federal backstop.
Can I roll an in-plan annuity into an IRA if I change jobs?
Often yes, but not automatically. The SECURE Act allows a direct, in-kind rollover of a lifetime-income investment if your plan removes that option from its menu, and many plans also permit a standard rollover on separation from service. The catch is that not every IRA custodian will accept an in-kind annuity contract, so confirm with the receiving institution before you initiate the transfer.
How much does the guarantee actually cost?
For a guaranteed lifetime withdrawal benefit rider, expect roughly 0.85% to 1.35% per year on top of the underlying fund’s own expense ratio, charged against a benefit base rather than your market value. Fixed annuities and QLACs don’t show a separate fee line; their cost is built into the credited interest rate or the payout factor instead.
What is a QLAC and how is it different from a GLWB rider?
A qualified longevity annuity contract is a deferred income annuity purchased with 401(k) or IRA money, paying a fixed income starting at a future age you choose, up to age 85. Unlike a GLWB rider, a QLAC has no market participation and no liquidity once purchased, but it removes the premium from RMD calculations until income begins and typically pays a much larger income stream because payments start later and are subsidized by mortality pooling.
Does buying an in-plan annuity affect my required minimum distributions?
Only a QLAC changes RMD math directly, by excluding its premium (up to the IRS’s indexed cap) from the account balance used to calculate RMDs until income payments start. A GLWB-wrapped fund or a fixed annuity used for accumulation is still counted as part of your regular 401(k) balance for RMD purposes.
References
- U.S. Department of Labor, Employee Benefits Security Administration — “Lifetime Income Disclosure” interim final rule and guidance under the SECURE Act, dol.gov
- Internal Revenue Service — guidance on qualified longevity annuity contracts (QLACs) and required minimum distribution rules under SECURE 2.0, irs.gov
- Employee Retirement Income Security Act of 1974, Section 404(e) — fiduciary safe harbor for selection of an annuity provider, as added by the SECURE Act of 2019
- National Organization of Life and Health Insurance Guaranty Associations (NOLHGA) — state-by-state annuity coverage limits, nolhga.com
- Plan Sponsor Council of America — annual surveys on adoption of in-plan lifetime income and guaranteed withdrawal benefit options
