A 65-year-old retiree in the U.S. is considering a single-premium immediate annuity that promises $2,500 per month for life [1], [3].

This scenario highlights the tension between guaranteed income and the loss of liquidity for retirees who lack traditional pensions. While the offer provides a safety net against market volatility, it requires the surrender of a significant lump sum.

The proposal involves the retiree transferring an entire $400,000 rollover IRA [1], [2] to an insurance company. In exchange, the insurer would provide a fixed monthly payment of $2,500 [1]. This arrangement is designed for individuals who want to eliminate market risk and ensure a steady stream of cash throughout their retirement [1], [2].

However, the trade-off includes several critical limitations. Because the payments are fixed, the annuity provides no inflation protection [5]. As the cost of living increases over time, the purchasing power of the monthly payment will likely decrease.

Additionally, the retiree would lose access to the principal amount [1]. Unlike a standard investment account where the balance can be withdrawn for emergencies or left to heirs, a single-premium immediate annuity typically consumes the principal to fund the lifetime payments. This means any remaining inheritance from that specific fund would be eliminated when the retiree dies [1], [3].

The retiree currently has no pension [2], making the guarantee of monthly income more attractive. The decision rests on whether the certainty of a monthly check outweighs the flexibility of maintaining a $400,000 investment portfolio [1], [2].

The offer provides a safety net against market volatility, it requires the surrender of a significant lump sum.

This case illustrates the 'longevity risk' versus 'liquidity risk' trade-off. By choosing an annuity, the retiree solves for longevity risk—the fear of outliving their money—but accepts liquidity risk, as the $400,000 principal is no longer accessible for unforeseen expenses or legacy planning. The lack of inflation adjustment further complicates the long-term viability of a fixed payment.