Annuities and safety first: buying a floor

Every withdrawal rule in this part attacks the same problem: making a risky pot of money last longer than a life of unknown length. A life annuity dissolves the problem instead. You hand capital to an insurer. The insurer pays you an income for as long as you live, whatever the markets do and however long you last.

It is the least loved product in personal finance and the most defended by economists. The paradox has a name, the annuity puzzle. It also has serious explanations and a practical resolution. An annuity is not an investment, and judged as one it is mediocre. It is insurance. It covers the one risk that neither the portfolio nor any withdrawal rule really handles: living a very long time (Horizon, life expectancy, and 50-year retirements).

This article follows a simple thread. First the economics, and the mortality credits that are the product's real source of return. Then the safety-first school, which settles what it is for: guarantee the floor, risk the rest. Then what the US market actually sells, what it no longer sells, and the best life annuity an American household can buy, which no insurer writes. Then the honest objections, inflation above all, the question of when and how much to annuitize, and how to test the move in a simulator. That test traps anyone who has not read this page, because the failure probability on screen can rise when you annuitize.

THE ECONOMICS OF AN ANNUITYThe mortality credit, and the age at which it takes overwhat the group's mortality pays the survivors, in % of capital a year024681077 to 81the risk premium given up: 2.5 to 3.5%/yr0.7%2.0%5.5%11% at 9260657075808590age at purchaseAt 65, converting a portfolio into an annuity gives up three points of premium to collect less than one.Past 80, no cautious portfolio reproduces what the group's mortality pays.
The mortality credit is the group's mortality itself, here under a Gompertz law fitted to annuitants (modal age 91). Against it, what the trade costs: turning a growth portfolio into a promise backed by bonds gives up the equity risk premium, 2.5 to 3.5 points a year. Before 77 you hand over more than you collect. After 81 nothing else comes close. The classic buying window is not a sales tradition. It is where the two curves cross.

The economics, no folklore§

An immediate life annuity is easy to take apart. The insurer takes your capital, converts it at a technical rate close to current bond yields, then spreads it over your life expectancy under a conservative annuitant mortality table. What comes out next is the insurer's own expenses and profit, and that is where a retail contract loses several points against the raw actuarial value. What is left is the payout rate: the annual income as a percentage of the money you handed over. Recent US quotes for a single life with no death benefit sit near 8% at 65, around 10% at 75 and above 12% at 80, and every one of those numbers moves with interest rates.

The naive reading compares that rate with the portfolio's 4% and jumps to a conclusion. The correct reading splits the payment into three parts: the return of your own capital, which is by far the largest, the interest, and the mortality credits. A portfolio can reproduce the first two. It cannot reproduce the third, and the third grows with age. That gives the working principle. An annuity beats a portfolio only where mortality credits are large, which means late in life, and only for the one need no asset covers, a floor that lasts as long as you do. Buying at 62 to pick up yield is a mistake. Buying at 78 to lock down the base of the budget rarely is.

The theory is old and it holds (Lifecycle theory: the academic backbone of the plan). Menahem Yaari showed in 1965 that a rational agent with no bequest motive should annuitize everything he owns. Modern work, once bequest motives and frictions are in the model, brings the optimum back to annuitizing part of the floor. That is the foundation of the safety-first school (Withdrawal strategies: the map before the territory), which Wade Pfau put into practitioner form. Cover the essential spending with income guaranteed for life: Social Security, an annuity, a bond ladder (Bond ladders (and the ladder of linkers)). Leave the portfolio carrying comfort and projects, where swings are tolerable (Flexibility: myth and reality (what it can really absorb)). The plan stops being one big bet. It becomes two tiers with different risks.

SAFETY FIRSTTwo columns that have to line up: the need, and what pays for ita couple of 74 and 72, $1.1M, $38k floor and $50k comfort, $k a yearthe floor, 38comfort, 12What you need every yearpensions, 26life annuity, 12portfolio, 12What pays for it, and at what riskthe floor,covered for lifeThe remaining $874k portfolio now funds just $12k a year, a withdrawal rate of 1.4%.Variability has no grip on the floor any more: all it can reach now is the travel budget.
The safety-first doctrine fits in the alignment of these two columns. On the left what you need every year, on the right what pays for it, and one rule: income guaranteed for life should reach the floor line and go no further. Whatever sits above it stays with the portfolio, where swings only threaten projects. Look at what the portfolio becomes after the trade: it now delivers 1.4% a year, a rate at which no withdrawal rule has any trouble at all.

The US market: what you can buy, and the one annuity nobody sells you§

What is actually on the shelf. The single premium immediate annuity, the SPIA, is the plain version: one check to the insurer, income starting within the year, priced off the payout table above. The deferred income annuity is the same contract bought years before it pays, and inside a traditional IRA or 401(k) that deferred contract can be written as a qualified longevity annuity contract, a QLAC, which also lifts the money out of your required minimum distributions until payments begin, up to a per-person dollar cap the IRS indexes. Everything else sold under the word annuity, variable, fixed indexed, buffered, all the living-benefit riders, is a different animal: an investment product in an insurance wrapper, with fee layers to match. This article is not about those.

The contract this chapter wants does not exist any more. A real annuity, one whose payments follow the CPI, is what a floor deserves. A handful of American carriers wrote them and have pulled them from the shelf. What remains is a fixed annual step written into the contract, a few percent a year, bought with a visibly lower starting payment. A step is not an index. It is a bet on what inflation will do.

Tax, in one sentence. Buy with taxable money and each payment is split by an exclusion ratio, the share that represents your own capital coming back tax free until your cost is recovered and the rest taxed as ordinary income (IRS Publication 939); buy inside a pre-tax retirement account and the whole payment is taxable, like any other distribution from it.

Counterparty, in one sentence. An annuity is a promise from one insurer, backed if that insurer fails by the guaranty association of your state, which in most states covers up to $250,000 of present value of annuity benefits, so a large purchase belongs with two or three highly rated carriers rather than one.

And now the best annuity available to you, which no insurer writes. Your Social Security retirement benefit already is a life annuity: adjusted for inflation every year by statute, carrying a survivor benefit for your spouse, and backed by the federal government. What most people miss is that you can buy more of it. Every month you postpone claiming past your full retirement age adds two thirds of one percent to the benefit, 8% for a full year, and the credits keep accruing until 70 (42 U.S.C. 402(w)). The price is the checks you skip in the meantime. Price that as an annuity and it is not close: no carrier sells a CPI-linked joint-life income at anything like that rate, because none of them funds itself at the government's cost and, as of today, none of them will index to the CPI at all. So the first annuity to examine is the one you already own, and delaying is how you buy more of it. The claiming-age mechanics, what the delay does for a surviving spouse, and how the decision sits next to the rest of the plan are in US health coverage and Social Security: the two ends of the gap. A private contract comes afterwards, to fill what is left, never instead.

One caution on everything in this section. The delayed retirement credit and the exclusion ratio come from statute and were checked in August 2026; payout rates are a market price that moves with yields, and the guaranty ceiling is set state by state. Check all three at the source before you sign anything.

The annuity puzzle: why nobody wants one, and when that is a mistake§

Economists love annuities. Savers run from them. The puzzle has explanations worth sorting through, because some of them are rational.

The rational reasons. The bequest motive first: the capital behind an annuity vanishes when you die. That is real, and partial annuitization plus a survivor benefit or a period certain mostly fixes it. Then uncovered inflation, the genuinely good objection, above. Then counterparty risk, capped by the state guaranty coverage just described, which is the argument for spreading a large purchase over more than one carrier. And finally irreversibility, for the day capital is suddenly needed for health or long-term care, which is why the buffer never gets annuitized (The cash buffer: size, cost, and what it is really for).

The behavioral reasons, and they cost money. The investment frame first: people judge an annuity as an investment with a poor return, and never judge their homeowner's policy that way. Then the breakeven illusion, "if I die at 79 I will have lost". Yes, the way you lose your fire premium when the house does not burn. That is exactly the scenario in which you did not need the money. And then overrating your own ability to run a portfolio at 88 (The psychology of spending: why spending it is the hard part). The research on retiree wellbeing is not ambiguous. At equal wealth, people with guaranteed income spend more calmly and report being happier. An annuity also buys permission to spend, which no wealth fan and no withdrawal rule ever hands you (Real spending in retirement (the retirement smile, Die With Zero)).

When, how much, how: the practical doctrine§

When. Not before 70 at ordinary interest rates: mortality credits are too small before that, and the portfolio does better. The 75 to 82 window is still the classic optimum for an immediate annuity. There is a sharper alternative, the deferred contract. Bought around 65, it pays nothing until 80 or 85. That is pure longevity insurance: you cover only the tail of the distribution, for something like 10% to 15% of the capital the same coverage would cost starting today. American carriers do sell it, and the QLAC wrapper makes it work inside a traditional IRA.

The same family of ideas gives the modern tontine. These are pooled longevity funds where the shares of the dead pass to the survivors, with no insurer carrying the risk and therefore none of its loads. Actuaries, Moshe Milevsky above all, study them as a serious alternative to a loaded annuity. Nothing at retail scale exists in the United States yet and the regulatory path is unclear, but the idea is worth knowing, because it could one day fill the gap between the portfolio and the annuity.

How much. The safety-first formula is simple: guaranteed income covers the spending floor (How much you need), not a dollar more. Comfort stays with the portfolio. What that leaves for a private annuity depends entirely on what Social Security delivers, and an early retiree should not assume it delivers much: a short earnings record and a run of zero years both pull the benefit down. Do that arithmetic before you shop. The residual gap is the size of the annuity, and for many FIRE households it is a real gap, which is what separates them from the readers most retirement advice is written for.

How to test it, in a simulator. Not every tool can model an annuity. The one you want converts a chosen share of capital, on a chosen date, into an income paid for life, then adds that income to your pensions for the rest of the plan. In practice it is one slider, "Annuitise % of capital". Set it honestly, which means conservatively: a joint-life annuity indexed to inflation, priced at a low real rate, on the order of 1%, and carrying a load of about 10%. A tool that prices the annuity at the expected return on stocks has invented a product that does not exist and made annuitizing free. Then comes the behavior that throws people. The failure probability on screen can rise when you annuitize. That is normal, and it teaches something. Failure measures the plan's inability to fund the total need. Converting growth assets into a guaranteed floor lowers the portfolio's expected value, so failure against the total need can go up. What really changes is the shape of the failures. The worst late-life scenarios, the one where you are alive and broke at 92, get better, because the floor never runs out. So read annuitizing on two outputs: failure crossed with mortality year by year (Horizon, life expectancy, and 50-year retirements) and the breakdown of what funds your standard of living, where the share coming from lifelong income rises. Never on the failure number alone (Failure probability: reading it, choosing it, and not letting it run you).

The essentials§

Going further§