Introduction
Living longer is one of the greatest achievements of modern society. Improvements in healthcare, nutrition, sanitation, technology and medical treatment have allowed people to survive illnesses that once shortened lives dramatically. For individuals and families, a longer life can mean more time with children and grandchildren, more opportunities to travel, pursue hobbies and remain active, and potentially many productive years after leaving full-time employment.
However, longevity has also created a financial challenge that previous generations did not face on the same scale: retirement can now last for several decades.
Traditional retirement planning was often based on the idea that a person would work for several decades, retire around their mid-60s and spend perhaps 10 to 15 years in retirement. That assumption is becoming increasingly outdated. People reaching retirement age today may have 20, 25 or even 30 years ahead of them. This changes almost every part of retirement planning, from the amount people need to save to the way pensions are structured and the age at which workers can realistically afford to stop working.
According to the OECD’s Pensions at a Glance 2025, people aged 65 in OECD countries had an average remaining life expectancy of 18.5 years for men and 21.6 years for women in 2024. The OECD projects that these figures will rise further by 2065.
The issue is not simply that retirees need more money. A longer retirement introduces uncertainty. Nobody knows exactly how long they will live, how much healthcare they will require, how inflation will affect their spending or what financial markets will do during those years.
This is why longevity is changing the meaning of retirement itself. Retirement is increasingly becoming less about reaching a specific age and more about building a financial system capable of supporting an uncertain number of years.
The challenge affects individuals, employers, pension providers and governments. Public pension systems must support growing numbers of older people, while fewer working-age people may be available to contribute to those systems. Individuals, meanwhile, must balance the desire to retire early with the possibility of needing their savings to last much longer than expected.
Longevity is therefore both a success story and a financial planning problem. The central question for the future will not simply be, “When can I retire?” It will increasingly become, “How can I make my money, health and income last for as long as I live?”
The Retirement Period Is Becoming Longer and More Difficult to Fund
The most obvious consequence of longer life is that retirement requires more funding.
Imagine two people who both retire at age 65. One lives until 78, while the other lives until 95. Even if their annual expenses are identical, the second person may need to finance 17 additional years of housing, food, utilities, transportation, insurance, leisure and other necessities.
This creates what financial planners often describe as longevity risk: the possibility that a person will live longer than their financial resources were designed to support.
The difficulty is that longevity risk is different from many other retirement risks because living longer is generally a positive outcome. A market crash can be avoided to some degree through diversification. Excessive debt can be reduced. Spending can potentially be controlled. But nobody can know their exact lifespan in advance.
That uncertainty makes retirement-income planning considerably more complicated.
For workers with traditional defined-benefit pensions, some of this risk may be absorbed by the pension system. For people relying heavily on personal savings or defined-contribution retirement accounts, the responsibility is much greater. They must decide how quickly to withdraw their money without knowing how many years the money will need to last.
A retiree who spends too aggressively during the first decade of retirement may face financial difficulties later. On the other hand, someone who is excessively cautious may spend far less than necessary during the healthiest years of retirement.
Inflation adds another layer of uncertainty. A retirement fund that appears large at age 65 may have substantially less purchasing power 20 or 25 years later. Even moderate annual increases in prices can have a significant cumulative effect over a long retirement.
Healthcare costs are particularly important. Longer lives do not necessarily mean decades of perfect health. A person may enjoy many healthy years but eventually require expensive medication, home assistance, nursing care or other long-term services.
This creates a difficult combination: people need enough money to enjoy retirement, but they also need to reserve resources for the possibility of expensive care later in life.
Public pension systems face a similar problem on a much larger scale. When people live longer while birth rates decline, the ratio between pension recipients and working-age contributors changes. The OECD estimates that across its member countries, the number of people aged 65 and above for every 100 people aged 20 to 64 could rise from 33 in 2025 to 52 by 2050.
This demographic shift can place pressure on governments to increase contributions, modify pension benefits, encourage later retirement or find other sources of funding.
The result is that retirement planning can no longer rely on a simple calculation based on a fixed retirement age. A longer lifespan requires a more flexible strategy that considers savings, investment returns, inflation, pensions, healthcare expenses and the possibility of working longer.
Longer Lives Are Changing When and How People Retire
Longevity is also changing the traditional idea that retirement must happen completely and suddenly at a particular age.
As people live longer, governments and employers are increasingly considering ways to keep older workers economically active. This can include later retirement ages, flexible working arrangements, part-time employment, consulting, reduced working hours and opportunities for people to transition gradually from full-time employment into retirement.
Recent OECD research illustrates this shift. Based on current legislation, the average normal retirement age across OECD countries for people beginning their careers in 2024 is projected to reach approximately 66.4 years for men and 65.9 years for women, compared with 64.7 and 63.9 years respectively for people retiring in 2024.
This does not mean everyone will work until those ages or that retirement will disappear. Instead, it shows how pension systems are responding to longer lives.
Working longer can provide several financial advantages. Additional employment years allow people to continue earning income instead of drawing heavily from retirement savings. They may also provide more time to contribute to workplace pension plans and allow investment accounts to grow.
Delaying retirement can also shorten the period during which personal savings must provide income.
But simply telling people to work longer does not solve the entire problem.
Older workers may face age discrimination, health limitations, physically demanding jobs or rapidly changing workplace requirements. Technology is transforming many occupations, and workers who spent decades developing expertise in one area may find that the skills required by employers have changed.
The OECD’s 2025 Employment Outlook notes that employment rates generally begin declining between ages 50 and 60 and fall more rapidly after 60, highlighting the difficulty of assuming that everyone who needs to work longer will automatically have the opportunity to do so.
This means future retirement policy needs to consider employability as well as pension eligibility.
Employers may need to rethink traditional career structures. An employee approaching 60 should not necessarily be viewed as being at the end of their economic contribution. Older workers may possess valuable experience, industry knowledge, management ability and professional networks.
Flexible employment could become increasingly important. Someone might work full-time until 65, reduce hours for several years and then move into consulting or occasional employment. Such arrangements could provide income while also giving people more freedom.
For individuals, the idea of a single retirement date may therefore become less important. A phased retirement could offer a middle ground between continuing a demanding full-time career and completely stopping work.
This approach can also have psychological benefits. Employment often provides social interaction, structure and a sense of purpose. A gradual transition can make the adjustment to retirement easier.
However, longer working lives must remain a choice rather than simply becoming a financial necessity. If retirement ages rise while people in physically demanding or lower-paid occupations are unable to remain employed, inequality could increase.
The future retirement system therefore needs to distinguish between living longer and being able to work longer. Those are not the same thing.
Healthcare, Family Responsibilities and the New Financial Risks of Longevity
The financial consequences of longevity extend far beyond pension accounts.
One of the biggest challenges is that the later stages of life can become considerably more expensive. People may spend many years in relatively good health, followed by a period when they need greater medical attention or assistance with everyday activities.
This creates a retirement pattern that is difficult to predict. Expenses may remain relatively stable for years before increasing sharply.
Healthcare inflation can make the situation more complicated. A retirement budget designed using today’s medical costs may underestimate future expenses. Insurance can help, but premiums, coverage limits, deductibles and exclusions vary considerably across countries and policies.
Long-term care is another concern. A person who lives into their 80s or 90s may eventually need assistance at home, residential care or support from family members.
These costs can affect not only retirees but also their children.
Family structures are changing at the same time that people are living longer. Families are often smaller, children may live far from their parents, and younger generations may face their own financial pressures, including housing costs, education expenses and childcare.
As a result, older adults cannot always assume that their children will be able or willing to provide financial or physical support.
This is particularly important in countries where family support has historically played a major role in retirement security.
The World Bank has highlighted how ageing, changing family structures and increasing longevity can create major pension and social-protection challenges, particularly where formal pension coverage is limited.
Longevity can also create an intergenerational financial dilemma.
Parents may want to leave money or property to their children, but preserving an inheritance can conflict with the need to fund their own retirement. Someone who lives another 20 years may need to use assets that they originally expected to pass to the next generation.
This is not necessarily a failure of planning. It reflects the uncertainty of a long life.
Housing becomes especially important. A mortgage-free home can provide financial security, but a large property may become difficult or expensive to maintain as people age. Moving to a smaller home could reduce costs, but emotional and family considerations often make downsizing difficult.
Retirees also face investment risk. A long retirement requires assets to remain invested for many years, but markets do not move in a straight line. A major market decline early in retirement can be particularly damaging if withdrawals continue while investments are falling.
This is why retirement planning increasingly requires attention to both accumulation and withdrawal strategies.
Saving a large amount of money is only one part of the solution. Retirees also need a method for turning assets into sustainable income.
Possible approaches include pensions, annuities, systematic withdrawals, income-producing investments and maintaining a cash reserve. The appropriate combination depends on individual circumstances, risk tolerance, taxes and available pension benefits.
Another important consideration is diversification. A retirement portfolio concentrated in one asset, industry or country may expose the retiree to unnecessary risks.
Ultimately, longevity requires people to think in terms of financial resilience rather than simply wealth accumulation. The objective is not necessarily to become extremely wealthy. It is to create enough flexibility to handle an unexpectedly long life, higher expenses or changing economic conditions.
This is also why retirement planning should begin well before retirement. The earlier individuals understand their expected income, expenses, pension benefits and potential healthcare needs, the more options they have.
Conclusion
Longevity is fundamentally changing retirement.
Living longer gives people more years to enjoy life, remain active and spend time with family. But it also means that retirement savings, pensions and social-protection systems must support people for longer periods. The traditional model of working for decades and then relying on a fixed pool of money for a relatively short retirement is becoming increasingly difficult to maintain.
The challenge is particularly significant because longevity interacts with several other trends. Birth rates are falling in many countries, pension systems are under pressure, healthcare costs can rise with age, employment patterns are changing and families may have fewer resources available to support older relatives.
The OECD expects population ageing to accelerate significantly over the coming decades, increasing pressure on pension systems and public finances.
For individuals, the answer is not simply to save more. Retirement planning needs to become more flexible.
People may need to consider working longer if their health and circumstances allow it. They may need to build multiple sources of retirement income rather than depending entirely on one pension. They may need to maintain investments throughout retirement, manage withdrawals carefully and prepare for healthcare and long-term-care expenses.
Governments also face difficult decisions. They must balance adequate retirement income with the long-term financial sustainability of pension systems. Raising retirement ages, changing contribution structures, encouraging older-worker employment and strengthening private retirement savings are among the approaches being considered in different countries.
Employers have an important role as well. If people are expected to remain economically active for longer, workplaces need to become more supportive of older employees. Flexible hours, retraining, less physically demanding roles and phased retirement could become increasingly important.
Most importantly, longevity should not be viewed only as a financial problem. It is also an opportunity.
A longer retirement can mean a longer period of personal freedom, family involvement, volunteering, learning and meaningful activity. The objective of retirement planning should therefore not be to minimize spending or simply accumulate the largest possible balance. It should be to create enough financial security to make a long life a benefit rather than a source of anxiety.
The retirement system of the future will probably look different from the retirement system of the past. Retirement may happen later, occur gradually and involve several sources of income. Savings may need to remain invested longer, while healthcare and longevity risks will require greater attention.
The central lesson is simple: people are no longer planning only for retirement. They are planning for a potentially very long life after work.
That requires a change in mindset. Instead of asking only how much money is needed to retire, individuals should ask how their financial resources can support different stages of life, including healthy active years, slower later years and the possibility of needing additional care.
Longevity is a remarkable achievement. The financial challenge is to ensure that the extra years it creates are accompanied by adequate income, healthcare, independence and dignity.