US Centenarian Population Surges, Prompting Financial Planning Rethink

The number of centenarians in the United States has seen a dramatic rise, nearly doubling over the past two decades, according to recent figures from the Office for National Statistics (ONS). While the total number of individuals aged 100 and older remains relatively small, approximately 16,400, this demographic shift carries substantial implications for personal finances, inheritance planning, state pensions, and long-term care costs.

Living into one's nineties has also become increasingly common, with a 55 percent increase to 645,000 people since 2005, the ONS data reveals. Notably, the growth rate among male centenarians has outpaced that of females. Between 2015 and 2025, the number of male centenarians rose by 47 percent to nearly 3,100, compared to a 15 percent increase among females, reaching just over 13,300 in the same period.

The ONS attributes the surge in centenarians, particularly in 2020 and 2021, to demographic patterns from a century prior. A dip in births during World War I, followed by a post-war "baby boom" generation born between 1919 and 1920, contributed to a significant increase in the population aged 105 and over in the UK, growing by nearly a third between mid-2024 and mid-2025. While these figures are from the UK, they reflect a broader global trend of increasing longevity.

Financial experts are advising individuals to prepare for potentially longer retirements, with some suggesting that a 30 or 40-year retirement is no longer unusual. This necessitates careful consideration of pension plans to ensure funds can last throughout an extended lifespan.

Retirement Planning for Longevity

Experts recommend a multi-faceted approach to managing retirement income. Sarah Coles, head of personal finance at AJ Bell, suggests building a substantial pension pot and considering flexible withdrawal strategies. Drawdown, which keeps the pension pot invested for potential growth, is one option, but careful management is crucial to prevent funds from depleting, especially considering "sequencing risk"—the impact of poor investment performance combined with large withdrawals in the early years of retirement.

Alternative strategies include variable withdrawal rates, regular reviews of fixed percentage withdrawals, drawing only the "natural yield" from investments, and purchasing inflation-linked annuities. For couples, the type of annuity chosen is critical. While defined benefit pensions often include survivor benefits, defined contribution pots used in drawdown can be passed on. However, opting for a single life annuity, which ceases payments upon the annuitant's death, can leave a surviving spouse in a precarious financial situation, particularly if they were not the primary income earner.

The cost of long-term care is another significant factor. Marianna Hunt, a personal finance specialist at Fidelity International, notes that annual care home costs can exceed $50,000 for self-funders, potentially placing immense pressure on retirement savings if care is needed for several years.

Furthermore, increased longevity means inheritances may be delayed, with children potentially receiving significant sums in their 60s or 70s, potentially long after such funds could have been most impactful.

Financial planning partners also highlight that while some lifestyle expenses may decrease in later retirement, others, such as domestic help, residential or nursing care, and increased heating costs, can emerge or escalate. Therefore, planning for a retirement that could extend well into one's nineties or beyond requires robust financial strategies that account for sustained income needs and potential unforeseen expenses.