How long does your money actually need to last?
The single most common planning error is underestimating lifespan. People look at an “average life expectancy” figure and quietly assume that’s their finish line. But an average is just that — half of people live longer, and for a couple, the relevant number isn’t either person’s individual life expectancy. It’s the joint life expectancy: how long until both partners have died. That is considerably longer than either figure alone.
A 65-year-old couple today has a meaningful chance that at least one of them sees 90, and a real — if smaller — chance of 95. If you plan for 20 years and live 28, the plan doesn’t fail gracefully. It fails right at the end, when you have the fewest options to fix it.
Case study
Planning to the wrong horizon
Margaret retired at 64 with $900,000 and built her plan around “about 20 years.” At 84, healthy and active, she realised her portfolio had been drawn down on the assumption it wouldn’t need to reach 90. She faced a choice no one wants at 84: cut her spending sharply, or accept a real risk of running short.
The fix would have been almost invisible at 64 — a slightly lower starting withdrawal and a little more growth exposure. The cost of fixing it at 84 was painful. Longevity risk is cheap to manage early and expensive to manage late.
The practical takeaway: plan to your joint life expectancy plus a margin, not to an average. The cost of planning for a few extra years is modest. The cost of outliving your money is not.
How much can you safely take each year?
There’s a tempting piece of folk wisdom that says: stocks return about 10% a year over the long run, so you can withdraw something close to that and never touch your principal. It sounds reasonable. It is wrong, and the reason it’s wrong is one of the most important ideas in this guide.
Markets don’t deliver their average return smoothly. They deliver it in a jagged sequence of good and bad years. And the order those years arrive in — the “sequence of returns” — matters enormously once you’re withdrawing money rather than adding it.
Why a bad first year hurts so much
Here’s the mechanism. If your portfolio falls 20% and you withdraw 10% in the same year, you don’t need a 30% recovery to get back to where you started — you need roughly 39%, because you’re now growing a smaller base and you’ve permanently sold assets at a low point to fund the withdrawal. Do that in the first few years of retirement and the damage compounds for the rest of your life.
Case study
Same average, opposite outcomes
Two retirees, Alan and Bryan, each start with $1,000,000, each withdraw $50,000 a year (rising with inflation), and each experiences the exact same set of annual returns — just in a different order. Alan happens to retire into a strong first few years; Bryan retires into a downturn.
Thirty years later, Alan still has a substantial portfolio. Bryan ran out in his early eighties. Same average return, same withdrawals — only the sequence differed. This is why “what’s the average return” is the wrong question, and “what happens if the first five years are bad” is the right one.
This is why a sensible starting withdrawal rate is far lower than 10% — and why the right figure depends on your time horizon, your mix of assets, and how much flexibility you have to cut back in bad years. A good adviser doesn’t hand you a magic number; they stress-test your plan against bad sequences and build in the flexibility to survive them.
Inflation: the quiet erosion
Even at a modest 3% average, inflation roughly doubles your cost of living over 24 years. Someone needing $60,000 a year at 65 may need close to $120,000 by their late eighties just to live the same way. A plan that ignores this — or holds too much in cash “to be safe” — quietly loses purchasing power every single year. Some costs that loom large in retirement, particularly healthcare, have historically risen faster than general inflation, which is one reason most retirees still need some growth-oriented investments well into retirement.
What is your portfolio actually for?
Before you can choose investments, you need to know what job the money is doing. “Grow it” and “keep it safe” pull in opposite directions, and most people never resolve the tension explicitly — so their portfolio ends up being a compromise no one designed.
A clearer approach is to define your primary objective in plain terms. Broadly, portfolios serve one of a few goals:
- Growth — you want the portfolio worth more at the end of your horizon than it is now, usually to fund a long retirement or leave a legacy.
- Income with growth — you need cash flow now, but the money still has to last decades, so it must keep growing too.
- Capital preservation — genuinely keeping pace with inflation and not much more; appropriate for shorter horizons, rarely for a 30-year one.
The mistake is assuming “I’m retired, so I want preservation.” For most people with a long joint life expectancy, a preservation-only portfolio is the riskier choice, because it almost guarantees a loss of purchasing power over time. Defining the objective honestly is what lets every later decision — asset mix, withdrawal rate, account sequencing — line up behind a single goal.
Where an adviser earns their fee
Naming the objective sounds simple, but it’s where DIY plans most often go wrong — because the honest answer is usually “growth for longer than feels comfortable.” An adviser’s job here is partly technical and partly behavioural: helping you hold an appropriate level of growth exposure without panicking out of it at the worst moment.
When should you claim Social Security?
Social Security is one of the few sources of guaranteed, inflation-adjusted income most retirees will ever have — and the claiming decision is largely irreversible. Claim early and you lock in a permanently lower benefit; delay and the benefit grows for each year you wait, up to age 70.
The instinct to “take it as soon as I can” is understandable but often costly, particularly for the higher earner in a couple, because that benefit also sets the survivor benefit. Delaying can effectively buy the surviving spouse a larger, inflation-protected income for the rest of their life — which ties directly back to the joint-life-expectancy point from Decision One.
Case study
The claiming decision that protected a survivor
David and Susan were both 66. David, the higher earner, wanted to claim immediately. Running the numbers against their joint life expectancy showed that if David delayed to 70 and Susan claimed earlier, the household gave up a few years of David’s benefit — but locked in a much larger survivor benefit for whichever of them lived longest.
Susan outlived David by eleven years. The delayed claim meant those eleven years were funded by a meaningfully higher, inflation-adjusted cheque — a difference of tens of thousands of dollars over her remaining life. The right claiming age is rarely “as early as possible.”
There’s no universal answer — health, other income, tax position and marital status all feed in. But it’s a decision worth modelling carefully rather than defaulting to the earliest date.
Which accounts do you spend first?
Most retirees hold money across three tax “buckets,” and the order you draw them down can change your lifetime tax bill substantially — and how long the money lasts.
Bucket Examples How withdrawals are taxed Taxable Brokerage accounts Capital gains / dividends, often at lower long-term rates Tax-deferred Traditional 401(k), IRA Taxed as ordinary income when withdrawn Tax-free Roth IRA / Roth 401(k) Qualified withdrawals are tax-free A common general approach is to spend taxable accounts first, then tax-deferred, then tax-free — letting the tax-advantaged accounts compound as long as possible. But “common” isn’t “right for everyone.” In lower-income early-retirement years, deliberately drawing some tax-deferred money (or converting it to Roth) at a low tax rate can save a great deal later, especially once Required Minimum Distributions force money out of tax-deferred accounts whether you need it or not.
Case study
The early-retirement Roth conversion window
Patricia retired at 62 and delayed Social Security to 70. Those eight years were the lowest-income years of her adult life — and a window most people waste. Rather than let her large traditional IRA sit untouched until RMDs hit at 73, she converted a measured slice to Roth each year, deliberately filling up the lower tax brackets but no further.
By 73 her eventual RMDs were far smaller, her tax bracket in her late seventies was lower, and a large pool of money was now growing tax-free for her heirs. The total tax saved over her retirement ran well into six figures — entirely from sequencing, not from earning a cent more.
The trade-offs only you can make
Every retirement plan is a set of trade-offs, and no spreadsheet can resolve them for you because they’re about values, not maths. The job is to make them consciously rather than by accident.
- Spend now vs. leave a legacy. Money enjoyed at 68 while you’re healthy is worth more to you than money left at 92 — but a legacy may matter more than your own comfort. Both are valid; drifting between them is not.
- Certainty vs. growth. Guaranteeing part of your income (for example through an annuity) buys peace of mind at the cost of flexibility and growth. The right amount of “floor” is personal.
- Working a little longer. Even two or three extra years of part-time income can transform a plan — fewer years of withdrawals, more years of growth, and a later, larger Social Security claim, all at once.
A good adviser’s role here isn’t to tell you which trade-off is correct — it’s to show you the real consequences of each, so you’re choosing with your eyes open instead of discovering the trade-off by accident a decade later.
Staying disciplined when it’s hard
The best plan in the world fails if you abandon it at the worst possible moment. And the worst moment is predictable: it’s when markets fall sharply, the news is frightening, and every instinct screams at you to sell and “get safe.”
Selling into a downturn does two things, both bad: it locks in losses you would otherwise have recovered, and it almost always leaves you on the sidelines for the rebound, because no one rings a bell at the bottom. Investors who flee to cash after a fall routinely miss the strongest recovery days — and missing even a handful of the best days can cut long-run returns dramatically.
Case study
The cost of one panic
In a sharp market fall, Robert moved his entire portfolio to cash “until things settle down.” Things settled down faster than the headlines suggested they would, as they usually do. By the time he felt confident enough to reinvest, the market had recovered most of its losses — he had crystallised the fall and missed the bounce.
His neighbour, with an almost identical portfolio, did nothing, on her adviser’s steady advice. Five years on, her portfolio was worth far more than Robert’s. The difference wasn’t skill, information, or luck. It was discipline — and having someone to talk him off the ledge that Robert didn’t have.
This is the least glamorous and possibly most valuable thing an adviser does: act as a circuit-breaker between your fear and your portfolio. The discipline to do nothing, at the moment doing something feels most urgent, is worth more over a retirement than almost any clever investment selection.
Putting it all together
A full example: the Hendersons, before and after
To show how these decisions compound, here is an illustrative couple — the Hendersons — making good-faith DIY choices, and then the same couple after working through the seven decisions with an adviser. The figures are illustrative and rounded to make the mechanics clear; they are not a forecast or a promise of any result.
The starting point
Tom (66) and Linda (64) Henderson have $1.4M saved: $1.0M in traditional IRAs, $250,000 in a taxable brokerage account, and $150,000 in Roth IRAs. They own their home. They want roughly $90,000 a year, before tax, to live comfortably, and they’d like to leave something to their two children if they can.
Before: the DIY plan
- Planned to “about 20 years” — to Tom’s mid-eighties.
- Tom claimed Social Security immediately at 66 to “get what he’d paid in.”
- Moved heavily into bonds and cash at retirement to “play it safe,” leaving little growth exposure.
- Drew from the IRA first because it was the biggest pot, leaving the Roth and taxable accounts largely untouched.
- No plan for the early low-income years; large RMDs loomed at 73.
Where this plan was heading
The conservative mix meant the portfolio barely outpaced inflation, so real spending power shrank each year. Drawing the IRA first meant fully taxable withdrawals from day one, and still-large RMDs at 73 that pushed the Hendersons into a higher bracket and increased the tax on Tom’s Social Security. Tom’s early claim locked in the smaller survivor benefit — a problem if Linda, four years younger, outlived him by a decade or more. The plan didn’t collapse, but it quietly leaked money to tax and inflation, and left Linda exposed.
After: the same couple, decisions made deliberately
- Planned to Linda’s joint life expectancy plus a margin — to age 95, not 85.
- Tom delayed Social Security toward 70, locking in a larger benefit and a much larger survivor benefit for Linda.
- Kept a meaningful growth allocation appropriate to a 30-year horizon, with enough stable assets to ride out bad years without selling growth assets at a loss.
- Used the low-income years before 70 to convert measured slices of the traditional IRA to Roth, filling the lower tax brackets deliberately.
- Spent taxable money first, smoothing the tax bill and shrinking future RMDs.
Where this plan ends up
The growth allocation roughly kept pace with their rising costs instead of falling behind. The Roth conversions cut the size of later RMDs and the tax that came with them, and left a tax-free pot for the children. Tom’s delayed claim meant that when he died at 84, Linda — who lived to 93 — had nine years of a substantially larger, inflation-protected income rather than the reduced survivor benefit the original plan would have left her. The headline portfolio figure ended up materially higher, but the real win was that Linda was never exposed to the shortfall the first plan was quietly building toward.
Nothing in the “after” plan required earning more, picking better investments, or taking on more risk. Every gain came from making the seven decisions deliberately rather than by default. That is what good advice actually delivers.
This guide is general information, not financial, tax or legal advice. Figures are current for the 2026 tax year and may change — verify against the cited sources and your own circumstances before relying on them.
Examples and case studies in this guide are illustrative only. The people described are composites, not clients. They are not predictions, guarantees, or representations of any individual’s results.
Past performance is not a guarantee of future results. All investing involves risk, including possible loss of principal.