By Jeremy Hewett, President and CEO, AccuQuote
An increase in life expectancy is a cause for celebration, although it brings with it complications and concerns from the knock-on effects of increased longevity on areas like healthcare and housing. Things are further complicated when broad national averages are contrasted with cohort-specific estimates, which provide insights into life expectancy post-65 as opposed to only estimating expected longevity at birth across the entire population.
It’s here that the life expectancy gap emerges, and challenges for long-term financial planning become apparent, with implications for individuals and society at large. As the latest data on life expectancy from the Centers for Disease Control and Prevention (CDC) and the Social Security Administration (SSA) arrives, now is a good time to investigate exactly what’s at stake.
Unpacking Life Expectancy Data
Traditional retirement planning relies on a static assumption about how long most people live. CDC reporting shows life expectancy at birth in 2024 reached 79.0 years, up 0.6 years from 2023. As mentioned, that single data point muddies the waters when it comes to financial planning, because it is a combined average across the entire population.
Moreover, a period life table captures a snapshot of current mortality conditions but does not account for future medical advances or lifestyle changes. SSA cohort estimates are more illuminating in this regard and project that a child born in 2024 will live to 84.2 years. The same SSA data set projects that when that child reaches age 65, they can expect another 20.4 years of life.
The clear conclusion is that these two numbers are not measuring the same thing. One is a period snapshot of current mortality conditions, the other a cohort projection that assumes survival keeps improving, and at birth they sit roughly five years apart. Building a financial portfolio or buying coverage on the period figure alone means planning around the more conservative of two plausible horizons.
The Hidden Financial Risk in Period Life Tables
The divergence between period snapshots and cohort realities changes how financial assets must perform over time. Period statistics reflect death rates across all age groups in a single calendar year, meaning they carry the weight of temporary spikes and historic health crises.
Cohort tables track actual populations as they age, factoring in persistent improvements in survival rates. The previously cited CDC National Vital Statistics Report demonstrates that period measurements lag behind cohort projections across almost every adult demographic.
How much they lag depends on where you start counting. The roughly five-year spread is a birth-level figure. At age 65 it narrows sharply: the CDC period table gives a 65-year-old another 19.7 years and the SSA period table 19.6, against the SSA cohort projection of 20.4. That is a difference of well under a year. In our experience at AccuQuote, even a gap that size is worth planning around, because long-term financial planning that ignores cohort projections is consistently planning for the shorter of two reasonable outcomes.
How Extended Coverage Protects Against Longevity Risk
Longer life spans require guaranteed risk transfer mechanisms that extend beyond typical working years. As a practical matter, relying exclusively on standard 20-year or 30-year term coverage can leave individuals exposed when health risks begin to compound.
As individuals live longer than past population averages, traditional fixed-term policies often expire before the need for financial protection ends. Evaluating modern coverage options helps align insurance durations with cohort projections rather than static population averages.
To prevent systematic shortfalls, income strategies can include dynamic withdrawal rates that adjust based on market sequences and age milestones, extended policy terms that protect surviving spouses well into their nineties, and inflation-protected annuities designed to absorb rising healthcare overhead over three decades. Extending policy terms and income safety nets shields accumulated wealth from late-life medical costs. Longevity planning moves the focus from accumulating a lump sum to sustaining income streams over an unpredictable timeframe.
Why 30-Year Retirements Require Different Asset Allocation
A common planning principle is that accumulating wealth for a 20-year retirement calls for a different asset allocation than preparing for a 30-year horizon. On that view, conservative portfolios heavily tilted toward fixed income could struggle to outpace cumulative inflation over extended periods.
The aforementioned SSA research indicates that unisex life expectancy at age 65 continues to increase as mortality rates decline across older age brackets. Keeping an equity allocation deeper into retirement is a widely used response, intended to maintain purchasing power while reducing the risk of outliving total capital.
Managing portfolio longevity demands balancing market growth with guaranteed income floors. When predictable lifetime income covers fixed costs, liquid assets can remain invested to counter the long-term erosion of purchasing power.
Closing the Gap for Good
Addressing the life expectancy gap means moving away from simplified rule-of-thumb retirement planning. Relying on headline average lifespan metrics could create a structural vulnerability in long-term financial security.
Incorporating cohort longevity projections helps keep term durations, withdrawal strategies, and risk protection models functional for 30 years or more post-retirement. Reevaluating existing risk models today can protect personal capital against the rising costs of longevity.
Jeremy Hewett, President and CEO, AccuQuote. Licensed Insurance Producer, State of Illinois, license no. 7875684 (NPN 7875684), life and health lines of authority. 18 years at AccuQuote, more than 2,500 families protected, over $1.2 billion in life insurance coverage placed.
