One of the hardest risks to manage in retirement is the uncertainty of longevity – how long the retiree will live, and therefore how long of a retirement time horizon needs to be planned for. Planning for too short of a retirement time horizon can lead to asset depletion if the retiree actually lives. Planning for too long leads the retiree to unnecessarily constrain retirement spending for a future that never occurs.
While one popular approach to managing the issue is simply to invest in a diversified portfolio, spend conservatively, and make adjustments in the future as necessary, an alternative is to actually buy “longevity insurance” in the form of a lifetime annuity. Historically, this could be done by purchasing a single premium immediate annuity at retirement, except in practice retirees rarely ever want to lock up so much of their capital - in fact, retirees annuitize so rarely that economists have dubbed it an "annuity puzzle".
A potential alternative, though, is to use a longevity annuity. This form of single premium deferred annuity still provides payments for life, but with payouts from the longevity annuity company not beginning until the distant future (e.g., at age 85). The upshot to this approach is that it significantly reduces how much capital must be committed to securing the longevity insurance guarantee, even as the deferred starting date can also delay required minimum distribution (RMD) obligations if purchased as a "qualified longevity annuity contract" (QLAC) inside of a retirement account.
And despite today’s low interest rates, a current longevity annuity quote reveals that it can already be an appealing competitor to the expected returns of a fixed income portfolio. In fact, if longevity insurance rates rise just a bit more, they may even become competitive with long-term equity returns, thanks to the benefit of mortality credits. Which means eventually, an allocation to a “longevity annuity bucket” may become a standard in retirement income planning… at least, as long as life expectancies don’t increase so much in the coming years that the longevity annuity rates just end out going down!