Two Offers, Two Different Risks — Not Two Amounts

01 What the choice actually is

A defined benefit pension promises an income for life. A lump sum offer converts that promise into a single payment now, calculated by the plan using mortality assumptions and an interest rate. Accepting it ends the promise entirely.

So the decision is not between two amounts of money. It is between an income you cannot outlive and a pot you must manage, and the question is which risk you would rather hold: the risk of living longer than your money, or the risk of the plan and its sponsor being there for thirty years.

Nothing about the lump sum is inherently worse. It is simply a different allocation of the same uncertainty, and it moves the management job from the employer to you.

Source: Topic no. 410, Pensions and annuities

02 The rate hidden inside the offer

Every lump sum offer contains an implied rate, and it is the single most useful number to extract. Divide the annual pension by the lump sum: a $2,600 monthly pension against a $480,000 offer is $31,200 a year, or 6.5%.

That is the return the lump sum would have to earn, every year and for life, simply to match what the pension pays without touching capital. It is not a hurdle you have to clear — you can spend capital too — but it puts the offer in terms you can compare against something.

The rate moves for reasons that have nothing to do with you. Lump sums are calculated using prescribed interest rates, and when those rates rise the lump sum offered for the same pension falls. An offer made this year and one made two years ago are not comparable, and the direction of travel matters if you have a choice about when to decide.

Source: Publication 939, General Rule for Pensions and Annuities

03 What the pension gives that a portfolio cannot

The pension pays until you die, whenever that is. No portfolio can make that promise, because no individual can pool their own longevity risk — there is one of you, and a sample size of one has no average to fall back on.

That matters most in the scenario people find hardest to plan for: living to 95 in reasonable health. A portfolio drawn at a sustainable rate may well survive it, but the household spends thirty years not knowing, and adjusts spending downward out of caution. The pension removes the question, and the value of that is behavioural as much as financial — it is the same argument set out in longevity risk.

There is a second, quieter benefit. Guaranteed income does not require decisions. A portfolio needs rebalancing, withdrawal discipline and judgement under stress, at ages when those become harder. A pension keeps paying whether or not anyone is managing anything.

Source: Publication 575, Pension and Annuity Income

04 What the lump sum gives that the pension cannot

Three things, and they are not small. Flexibility: a lump sum can fund an irregular need — a care cost, a house purchase, a bad year — that a fixed monthly payment cannot stretch to. Inheritance: whatever remains passes to your heirs, whereas a single-life pension pays nothing after your death.

And inflation protection, which is the one most often underweighted. Most private pensions are fixed in nominal terms. Over 25 years, even moderate inflation removes a large fraction of the purchasing power of a payment that never rises. An invested lump sum at least has the possibility of keeping pace; a fixed pension certainly does not.

Check the specific offer on this point rather than assuming. Some pensions carry cost-of-living increases and some do not, and the difference between them over a long retirement is larger than most of the other factors combined.

Source: Publication 575, Pension and Annuity Income

05 Whose promise is it

Taking the pension means relying on the plan and its sponsor for decades. Private defined benefit plans are generally insured by the Pension Benefit Guaranty Corporation, which pays benefits up to statutory limits if a plan fails.

For most retirees those limits sit comfortably above their benefit, so the protection is effectively complete. For a higher-earning participant with a large pension, the guaranteed amount can be materially less than the promised one, and that gap is a genuine reason to weigh the lump sum more heavily.

Public sector and church plans sit outside that insurance entirely, with protections that vary. Where an offer is being made by a sponsor in visible financial difficulty, the fact that an offer is being made at all is itself information — plans de-risk by buying out liabilities, and the terms usually favour the party proposing them.

Source: Topic no. 410, Pensions and annuities

06 Deciding, and the option that is not either

A workable order. First, cover essential spending with guaranteed income — Social Security plus whatever pension is needed to meet fixed costs. Second, take the remainder however suits your other goals. A household whose essentials are already covered by Social Security has much less need of the pension's guarantee and can weigh the lump sum on its merits.

Then check three specifics. The survivor option, since a joint and survivor election pays less but protects a spouse who may live years longer. Any cost-of-living provision. And whether a partial lump sum is available — many plans allow taking some as cash and annuitising the rest, which is frequently the sensible answer and is rarely presented as an option.

One procedural point that protects more households than any calculation. A married participant in a private plan generally cannot waive the joint and survivor annuity — or take a lump sum in place of it — without their spouse's written consent, witnessed by a plan representative or a notary. That requirement exists precisely because the decision is frequently made by the participant alone and its consequences fall on someone else, potentially for decades after the participant has died. If you are the spouse being asked to sign, that signature is the whole of your protection, and it is worth understanding what is being given up before it is given.

On tax, a lump sum rolled directly into an IRA is not a taxable event, and the money is then subject to the ordinary rules governing withdrawal sequencing. Taking it as cash instead makes the whole amount income in one year and is almost never right.

Source: Publication 575, Pension and Annuity Income

07 Reading the paperwork before the deadline

Lump sum offers arrive with a response window, and the window is usually short relative to the size of the decision. Three things in the pack decide more than the headline numbers, and none is prominent.

The first is the default. If you do nothing, most plans pay a married participant a qualified joint and survivor annuity — a reduced monthly amount that continues to a surviving spouse. That default exists because it protects the spouse, and every alternative on the form is a step away from it. Knowing what the default is tells you what you are being asked to give up.

The second is the set of survivor percentages on offer. A 50%, 75% and 100% survivor option each pay a different monthly amount, and the right one depends on how much of the household's income the survivor would lose. A spouse with little pension of their own needs a higher percentage than one with a full benefit of their own.

The third is whether the offer recurs. Some plans make a one-time window offer during a de-risking exercise and never repeat it; others allow the election at any point before payments begin. If it is a single window, the deadline is real and worth diarising the moment the letter arrives, because the analysis takes longer than people expect.

Source: Retirement topics — qualified joint and survivor annuity