Most retirement calculators assume you’ll live to 85 or 90.
That assumption is increasingly wrong. According to the Society of Actuaries, a 65-year-old couple today has a 50% chance that at least one partner lives past 92. Living to 95 or beyond is no longer a statistical outlier; it’s a real planning scenario that most retirement income strategies weren’t built to handle.
A 35-year retirement changes the math in ways that matter.
Why Standard Withdrawal Strategies Struggle Over 35 Years
The 4% rule to withdraw 4% of your portfolio annually, adjusted for inflation, was designed with a 30-year retirement horizon in mind. Stretch that to 35 years, and the model becomes significantly more fragile.
The reason isn’t just duration. It’s a sequence of returns. If a retiree experiences poor market performance in the first five years of retirement which is historically common enough to plan for and is simultaneously drawing down the portfolio to cover expenses, the damage is compounding in the wrong direction. Shares sold at depressed prices don’t recover for that retiree, because they’ve already been spent. A portfolio that might have lasted 30 years can fail at 22 or 23 under bad sequence conditions.
A lifetime income annuity doesn’t have this problem. The payment amount is fixed by contract. It doesn’t matter what the S&P 500 did in year two of retirement, or year fourteen. The check arrives.
What Makes a Lifetime Income Annuity Different From Other Products
The defining feature of a lifetime income annuity is that payment cannot be outlived. Most investment products convert money into more money. A lifetime income annuity converts money into guaranteed monthly income for as long as the policyholder lives whether that’s 12 years or 38.
The mechanism that makes this financially sustainable for the insurer is risk pooling. The insurance company holds premiums from many policyholders and pays out according to actual lifespans across the group. People who die early effectively subsidize people who live longer than average which means the longer you live past the breakeven point, the more favorable the math becomes for you.
The breakeven point the age at which cumulative payments equal the original premium typically falls in the early to mid 80s depending on the product, the premium, and prevailing rates. Someone who lives to 97 has been receiving “free” income from a pooling arrangement for over a decade.
Two Approaches to the Longevity Problem
There are two common ways to use a lifetime income annuity in retirement planning, and they solve slightly different problems.
The first is an immediate income annuity, purchased at or near retirement, which begins paying within 30 days. This replaces the paycheck directly and covers baseline monthly expenses from day one. For someone retiring with a clear income gap between Social Security and monthly spending, this is the most direct fix.
The second is a deferred income annuity sometimes called longevity insurance purchased now but with payments starting at 80 or 85. This costs significantly less than an immediate annuity for the same future payout, because the insurer has decades to invest the premium before paying out. It’s designed specifically for the tail risk scenario: what happens if you live well past 90 and your portfolio runs dry?
Used together, these two structures create something a self-managed portfolio rarely can: guaranteed income from day one of retirement through the end of life, regardless of how long that turns out to be.
Advisors at platforms like Retire Wizard regularly build retirement income plans that combine both structures with an invested portfolio covering the fixed expense floor with guaranteed income and leaving growth assets for variable spending, healthcare costs, and inflation.
The Inflation Question
One fair criticism of fixed lifetime income annuities is that a payment locked in at 65 buys less at 85 if inflation has averaged 3% annually for two decades. That’s a real concern, and worth planning around.
Some lifetime income annuity products offer cost-of-living adjustment riders a percentage increase in payments each year, typically 2% to 3%. These riders reduce the initial monthly payment, sometimes significantly, in exchange for purchasing power protection over time.
Whether the trade-off makes sense depends on how much of your income is annuitized versus held in inflation-sensitive assets. Annuitizing a portion of retirement income rather than all of it and keeping the remainder in an invested portfolio is the most common approach to managing this tension.
The inflation risk of a fixed annuity is real. It is also manageable, and it is categorically less dangerous than the longevity risk of running out of money entirely.
What the Numbers Suggest
A 65-year-old purchasing a single-life immediate income annuity with $150,000 might receive approximately $850 to $950 per month for life at current rates. A joint-life option covering a spouse would reduce that to approximately $750 to $850.
The same $150,000 invested and drawn at 4% annually generates $500 a month and carries both longevity and sequence risk.
The gap between $500 and $850, guaranteed for life, is not a minor difference. For someone whose monthly expense gap is around $800, that’s the difference between a funded retirement and an underfunded one.
These numbers shift with interest rates, age at purchase, and carrier. Getting current illustrations from two or three carriers before deciding is standard practice and easy to do through an advisor who works with multiple insurers.
Final Thoughts
A 35-year retirement is long enough that the strategies designed for a 25-year one start to break down. Sequence of returns risk, longevity risk, and the compounding drag of ongoing withdrawal decisions all become more significant when the timeline extends.
A lifetime income annuity doesn’t solve every problem in a long retirement. But it solves the most fundamental one: it makes running out of money structurally impossible. For a retirement that might last longer than some careers, that guarantee is worth understanding carefully before deciding whether or not to use it.
