
How Long Should I Plan for Retirement? A Guide to Secure Retirement Income Planning
Retirement planning is one of the most important financial decisions you’ll ever make. Many financial plans make assumptions about longevity, but planning for an excessively long life can lead to unnecessary underspending, while underestimating lifespan can result in financial shortfalls. Three important risks center around: Investment Risk – The variability of market returns can impact retirement income. Inflation Risk – The purchasing power of money may decline, and failure to account for inflation properly can lead to financial strain. Longevity and Mortality Risk – The uncertainty of lifespan impacts how retirement assets should be managed. The important questions focus on longevity risk (outliving resources) and mortality risk (one spouse dying earlier than expected and reducing household income). These two risks create a dilemma in retirement planning. How Long Should I Plan For Retirement? If you underestimate your lifespan, you risk running out of money. If you overestimate, you might live too frugally and miss out on enjoying your wealth. Most financial plans default to assuming a 30-year retirement, with a fixed lifespan to age 90 or 95. However, this one-size-fits-all approach can create financial risks. A smarter strategy considers longevity risk, mortality risk, and retirement income sustainability. In this comprehensive guide, we will go over: How long people are living today (historical trends in life expectancy) The risks of outliving your savings (longevity risk) The financial impact of losing a spouse early (mortality risk) The best strategies for a sustainable retirement income Common retirement planning mistakes to avoid By the end, you’ll be better equipped to plan for a retirement that lasts, without overspending or underspending. How Long Do People Live? Understanding Life Expectancy Trends To plan retirement correctly, you must first understand how long people live today. Life Expectancy Over The Last Century In 1900, the average life expectancy at birth in the U.S. was 47 years. As of 2020, it’s nearly 80 years. Source: CDC, Social Security Administration, mortality.org More importantly, life expectancy increases as you age. Please keep in mind these are averages, but if you’re 65 today, you have a 50% chance of living to 85. A 65-year-old couple has a 50% chance that at least one spouse will live past 90. 25% of 65-year-olds will live to 95 or beyond. To put this in perspective, consider the individual who was 65 in 2020. They were born in 1955. In 1955, their life expectancy was probably a little over 68 years. Now, at age 65, their life expectancy is 85 years, 17 years longer on average. This data proves that planning retirement to 95 is not extreme – it’s realistic for many people. Why Traditional Life Expectancy Assumptions Fail Most retirement plans use a fixed life expectancy, usually age 90 or 95, to determine how long income needs to last. While this seems safe and conservative, it often leads to oversimplification, rigid planning, and missed opportunities. Retirement isn’t a one-time calculation. Life expectancy isn’t a single number. It’s a moving target that changes as you age and as your circumstances evolve. Just as investment plans are regularly reviewed and updated, your retirement timeline should also adjust based on real-life developments: health status, medical advances, family history, and lifestyle changes. For example, if you’re 65 today and healthy, the fact that you’ve already reached 65 improves your odds of reaching 85, 90, or beyond. But most traditional plans never revisit that assumption. They set it and forget it. The result? Retirees either underspend out of fear or overspend by assuming too much certainty. Here’s why fixed life expectancy assumptions fall short: Life expectancy increases with age. If you make it to age 70, your life expectancy is no longer 85; it has increased. Fixed models ignore this progression. Health and lifestyle play a major role. Non-smokers, physically active individuals, and those with healthy diets typically outlive the averages. A 65-year-old in excellent health could easily live 25 to 30 more years. Family history matters. If your parents and grandparents lived into their 90s, your personal odds of longevity are higher than average. This nuance is rarely reflected in traditional plans. Higher income and education correlate with longer life. Studies show that individuals in the top income quintiles live significantly longer than those in lower ones. Yet most life expectancy assumptions are based on general population averages. Static planning ignores medical and technological advancements. Innovations in medicine, diagnostics, and treatments extend lifespans. A fixed plan doesn’t account for progress that may add years to your life. Psychological behavior skews decision-making. When clients see a retirement plan that ends at age 90, they subconsciously think of it as a finish line. That can distort spending behavior by either being too cautious or too reckless. To improve accuracy and confidence, your retirement plan should treat life expectancy as a dynamic probability, not a static endpoint. The Two Biggest Retirement Risks: Longevity vs. Mortality Longevity Risk: What If I Live Too Long? One of the most overlooked dangers in retirement planning is the longevity risk, which is the risk of living longer than expected and running out of money as a result. While it may seem like a “good problem to have,” it can be financially devastating if not planned for correctly. Many retirees assume they’ll live into their 80s and base their savings and withdrawal strategy accordingly. But the truth is, you could live 10 to 15 years longer than expected, especially with improvements in healthcare and genetics working in your favor. Without a flexible, sustainable income strategy, these extra years can put serious stress on your portfolio. This is, by far, the biggest concern we see with investors nearing retirement. Example: Jane’s Retirement Plan Jane, 65, retires with $3.5 million in savings. She plans for a 30-year retirement (to age 95). She withdraws $120,000 per year from her IRAs to help cover expenses. If she lives beyond 95, she could run out of money. The problem? Jane doesn’t know if she’ll live to 75 or 105. A 30-year retirement is no longer rare. If your plan only anticipates 20 to







