Income Annuities: When Buying a Floor Beats Building One

For a healthy 65-year-old in 2026, a single-premium immediate annuity will typically generate 15% to 25% more monthly income per dollar than a bond ladder of equivalent credit quality. That is not a product pitch. It is mortality credits, the one thing an insurer can offer that you cannot replicate in a portfolio you build yourself.

What Mortality Credits Actually Do to the Math

A bond ladder works by matching maturities to spending years. Buy enough bonds maturing each year from 65 to 90, and you have 25 years of covered income. The flaw is that you fund all 25 years upfront, including the years you may not reach.

A single-premium immediate annuity (SPIA) pools longevity risk across thousands of annuitants. The premiums of people who die early subsidize the income of people who live long. Those are mortality credits, and the advantage widens the older the buyer is at purchase.

A deferred income annuity (DIA), sometimes called longevity insurance, takes this further. Fund it at 65, income begins at 80 or 85. The deferral compounds the effect, and the premium is a fraction of a SPIA's, freeing the intervening years' assets to grow.

This is the core of the Roots stage of the Sporos Doctrine: before the portfolio is freed to pursue long-term return, essential income must be floored so it never has to liquidate into a down market.

Where Caution Is Warranted

Not all annuity products belong in this conversation. Variable annuities wrapped in income riders, indexed annuities with participation caps and surrender charges running 8 to 10 years: these are distribution products engineered around a sales commission, not income-floor tools. The test is simple. If you cannot read the contractual monthly income in plain dollars on page one of the illustration, it is not a floor.

For a SPIA or DIA that passes that test, insurer credit quality is what remains. These contracts are backed by the insurer's general account, not by SIPC coverage the way a brokerage account is. You want carriers rated A or better by at least two major agencies, and you want to know your state's guaranty fund limits before committing a large sum to one insurer.

An inflation rider (typically a 1% to 3% annual step-up) trades initial payout for purchasing power protection.

The Question That Changes the Answer

The fact that determines whether a SPIA or DIA belongs in your plan is not your age or your health. It is the size of your income gap: the distance between Social Security and pension income and your essential monthly spending. A small gap may be closable with a modest bond allocation. A large gap, and the mortality-credit advantage becomes decisive.

Where plans go wrong is rarely the annuity itself. It is sizing it against the full income architecture, accounting for sequence-of-return risk in the portfolio above the floor, and making sure the tax treatment of the income stream fits the wrapper it lives in. Get the product right and the sizing wrong and you have locked up capital you needed elsewhere. Those interactions are worth a conversation before you commit a premium.

The information provided is for educational purposes only and does not constitute investment, legal, or tax advice. Consult with qualified professionals for guidance specific to your situation.