What Is Mortality Credit?

Mortality credit is a fundamental concept in the design of life annuities. It refers to the additional return that annuity holders receive as a result of others in the annuity pool dying earlier than expected. In simple terms, when one annuitant dies, their remaining annuity payments are forfeited and redistributed among the surviving annuitants. This redistribution creates an extra source of income beyond what could be achieved through investment returns alone.

The concept only applies to certain types of annuities — specifically lifetime income annuities — where payments continue for as long as the annuitant is alive. It is a key factor that allows annuities to provide a guaranteed stream of income for life, often with higher payout rates than similarly conservative investments.

How It Works

Annuities that generate mortality credits operate based on risk pooling. When individuals buy a lifetime annuity, they essentially enter into a contract with an insurance company to exchange a lump sum of money for guaranteed income that lasts for the rest of their life. The insurance company then pools together many such contracts from different individuals.

Statistically, some annuitants will live longer than average, while others will die sooner. Those who die early effectively subsidize the payments for those who live longer. This subsidy is not malicious or exploitative — it’s an inherent and agreed-upon part of the contract. Mortality credits are not earned by taking on market risk, but rather by outliving other participants in the pool.

To illustrate, consider two 70-year-olds who each purchase a lifetime immediate annuity. One passes away at 73, while the other lives until 90. The individual who lives longer continues to receive payments long after the insurance company has stopped paying the deceased annuitant. That additional income is partly funded by the pool of premiums from those who died earlier. This redistribution effect is the mortality credit in action.

Why Mortality Credits Matter

Mortality credits offer a powerful solution to one of retirement’s most difficult challenges: longevity risk. This is the risk of outliving your assets. Unlike investments that eventually run out if withdrawn too aggressively, lifetime annuities with mortality credits provide income that doesn't expire while the annuitant is alive.

The existence of mortality credits helps explain why annuity payouts, particularly for older buyers, can appear higher than what would be expected from a traditional fixed-income investment with similar risk. For example, a retiree might receive 6% or 7% in annual income from an immediate annuity, even when bond yields are significantly lower. Part of that difference is attributable to mortality credits rather than market performance.

Another benefit is that mortality credits are not subject to market volatility. They are actuarially determined and built into the structure of the annuity. This makes them a reliable source of income that is largely uncorrelated with stock and bond markets.

Limitations and Considerations

It’s important to understand that mortality credits are not guaranteed to benefit any one individual. They provide higher expected returns on average for a group of people, but any single annuitant may not live long enough to realize those benefits. Those who die early receive less in total payments than they contributed.

This dynamic means that annuities with mortality credits may not be ideal for individuals in poor health or with shorter-than-average life expectancies. For healthier individuals or those with longevity in their family history, mortality credits can significantly increase the lifetime value of an annuity.

Another consideration is the loss of liquidity. Once you purchase an annuity that provides mortality credits, you typically cannot access the original principal. This irreversible trade-off means buyers should be confident in their decision and ideally use only a portion of their retirement assets for such products.

Mortality Credits vs. Investment Returns

Mortality credits are often misunderstood as being similar to investment returns. However, they are fundamentally different. Investment returns are generated by financial markets and come with risk and volatility. Mortality credits, on the other hand, are generated through the pooling of longevity risk. They are predictable and not subject to the ups and downs of economic cycles.

The most effective retirement strategies often involve a combination of both. For example, a retiree might use part of their portfolio to purchase an annuity with mortality credits to cover essential expenses, while keeping the rest invested for growth and flexibility.

The Bottom Line

Mortality credits are a unique feature of lifetime annuities that enhance income for those who live longer by redistributing funds from those who die earlier. They are not a form of investment return, but a result of shared longevity risk among annuitants. For retirees concerned about outliving their money, mortality credits provide a powerful incentive to consider annuitized income. However, they come with trade-offs, including loss of liquidity and limited benefit for those with shorter life expectancies. As with any financial product, understanding how mortality credits work can help individuals make informed decisions about their retirement income strategy.