It’s an unfortunate but true reality that the traditional idea of longevity isn’t quite what it is used as the risk associated with running out of money too soon is very real. This reality is what is driving many different kinds of retirement calculations as well as safe-withdrawal-rate conversations, and arguably keeps many financial planners employed. The reality is that while many retirees understand the risks, they aren’t doing enough to plan for it, and if you happen to run out of money at 92, you’re in big, big trouble.
However, there is a different longevity risk that retirement plans routinely ignore, and it’s one that is arguably more likely and even more devastating than most people realize. It isn’t even about running out of money, it’s about running out of the capacity to manage it. As lifespans extend into the late 80s and 90s, the odds of experiencing cognitive decline, chronic illness, or simply the exhaustion of having to manage complex financial lives increase.
This isn’t even a distant hypothetical as the first wave of Boomers is now entering their 80s, and the gap between “lifespan” and “healthspan” is becoming even clearer. Living longer doesn’t automatically mean living well longer, and for retirement purposes, this distinction matters in a big way.
The Gap Between Living Longer and Living Well
Life expectancy has increased steadily, but healthy life expectancy hasn’t kept pace. A 65-year-old today can expect to live into their mid-80s on average, with a reasonable chance of reaching 90 or beyond. However, the probability of reaching those ages without significant health challenges, like a cognitive decline, mobility limitations, or chronic conditions requiring ongoing management, is much lower.
Research now suggests that the average American spends the final two to three years of life requiring substantial assistance with daily activities. For many, this period extends to five years or more, and this isn’t the kind of retirement that is shown in the brochures with active seniors traveling and enjoying hobbies.
Instead, it’s a period of dependency that requires either family caregiving, professional care, or both. Most retirement plans account for healthcare costs in a general sense, but fail to model this extended period of diminished capacity and the expenses that accompany it.
Cognitive Decline Changes Everything
The risk that receives the least amount of attention is likely a cognitive decline, which doesn’t mean dementia, but the gradual erosion of financial decision-making capacity that affects a significant percentage of older adults. Studies have shown that financial literacy peaks in the mid-50s and declines steadily thereafter, even among those without diagnosed cognitive impairment. The ability to evaluate complex financial investment decisions, recognize fraud, and manage tax-efficient withdrawals diminishes exactly when the stakes are the highest.
This is something of a cruel paradox, as retirement plans only grow more complex over time as required minimum distributions kick in, Social Security optimization decisions arise, and healthcare costs become a full-time managerial role. Yet, the cognitive resources required to handle this complexity are declining. Elder financial exploitation increases dramatically with age, and victims frequently don’t recognize they have been victimized.
The planning implication is most relevant here in that, during retirement planning, you shouldn’t assume you will be able to manage it all forever. Building in simplification triggers, trusted decision-making partners, and professional oversight before it’s needed protects against a risk that pure financial planning all too often ignores.
The Surviving Spouse Problem
Most married couples plan retirement as a unit, projecting joint expenses and shared income. However, the statistics say that one spouse will likely spend years, sometimes a decade or more, living alone. Women often outlive men by an average of five years, and the surviving spouse often faces a financial picture dramatically different from the one that is planned.
Social Security benefits drop when one spouse dies, and pension income may reduce or disappear altogether. The reality is that housing costs, property taxes, and basic living expenses don’t always decline in proportion. The surviving spouse, often the one with less financial management experience, must suddenly navigate a more constrained budget while grieving and potentially managing their own health challenges.
Many retirement plans simply don’t stress-test for this scenario adequately. They model “our” retirement rather than “my” retirement, and this can leave a surviving spouse vulnerable to a situation that’s statistically likely to occur.
What Planning for Real Longevity Looks Like
Addressing all of these risks requires moving beyond spreadsheets and calculators into territory that feels uncomfortable. This means having discussions about capacity, putting into place legal documents that grant decision-making authority, and honest assessments of who can manage your financial life when you cannot.
Practically, this means that establishing durable powers of attorney is necessary before it’s needed, not just having the documents, but ensuring the named individuals understand your financial situation. Someone else needs to know where the bank and investment accounts are held and have an existing relationship with an advisor. This also might mean simplifying a portfolio structure as you age, consolidating accounts, and reducing the number of decisions that are required to maintain your financial life. It also means considering whether a trusted financial advisor or institutional trustee should have expanded authority as cognitive capacity becomes uncertain.
It also means planning explicitly for the surviving spouse by ensuring both partners understand household finances, modeling income and expenses under widowhood scenarios, and having honest conversations about what each spouse would do if left alone. It’s safe to say these are not pleasant conversations, but they also address a longevity risk that threatens most retirements, and it isn’t running out of money, but running out of the ability to manage it wisely when it matters most.
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