Guaranteed income for life appeals to many Feds. A Thrift Savings Plan (TSP) annuity converts part of your account into a monthly payment that lasts as long as you do.

That trade brings simplicity and stability, but it also limits flexibility. Before making an irreversible decision, it helps to understand how the TSP annuity works, who it fits, and why many retirees choose another path.

How it Works: A TSP Life Annuity Explained

You can purchase a TSP life annuity at or after separation from federal service using funds already inside your TSP account. Once you make that decision, it cannot be undone.

You select from several design choices:

  • Single life or joint life payments
  • Level payments or payments that increase by 2% annually
  • Optional features such as a cash refund or a 10-year certain period

After purchase, the annuitized portion of your TSP converts into guaranteed monthly income for life. You no longer control or have access to the principal tied to that income stream.

That permanence shapes every planning conversation that follows.

Who it’s Best For

The TSP annuity is best suited to a narrow group of retirees.

It tends to fit individuals who:

  • Value predictable cash flow more than flexibility
  • Expect a long life expectancy and prefer minimizing market exposure
  • Want survivor income certainty for a spouse without relying on portfolio performance

For retirees who prioritize income stability above all else, an annuity can feel reassuring. For others, the tradeoffs loom larger than expected.

Key Tradeoffs to Understand

An annuity is a permanent decision, and the consequences stay in place.

  • Once TSP dollars move into an annuity, access ends. The money no longer covers unexpected expenses, large purchases, or plan changes.
  • Without refund or period-certain features, nothing passes to heirs. Adding those features reduces the initial payment.
  • Fixed payments lose purchasing power over time. Prices rise while the check stays flat. The 2% increase option starts lower and can pressure early-retirement cash flow.
  • Payouts depend on interest rates at the time of purchase. A poor rate environment locks in lower income permanently.

What this comes down to is simple. An annuity provides a steady payment and removes control over the annuitized dollars. Monthly withdrawals preserve control, but only if discipline holds during market declines.


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A Practical Reality Check

Serving Those Who Serve generally takes a cautious view of the TSP annuity for most Federal Employees Retirement System (FERS) retirees. That position comes from structure, not bias.

FERS retirees already have two sources of guaranteed income backed by the full faith and credit of the U.S. government:

  • A FERS pension
  • Social Security benefits

Those income streams provide a baseline with inflation adjustments, even if the adjustments remain incomplete. For many retirees, the real challenge is the long-term inflation gap created by cost-of-living adjustments (COLA) limits, especially in the years before full Social Security begins.

Investment portfolios often address that gap more effectively than fixed annuity payments. Growth assets, managed within a defined risk framework, offer better long-term inflation protection.

Very specific situations exist where a TSP annuity could make sense. Those cases remain the exception. Anyone considering an annuity should speak with a qualified advisor before making an irreversible decision.

Smart Ways to Use it 

If an annuity stays in the mix, avoid going all in.

Some retirees limit annuity income to fixed expenses and leave the rest of the account alone. Others hold cash or short-term bonds outside the annuity, typically enough to cover 6–24 months of spending, to get through market declines.

The timing decisions interact. Social Security elections, FERS or Civil Service Retirement System (CSRS) pension start dates, and any annuity purchase affect each other. When those dates do not align, the annuity often misses the issue it was meant to address.

Alternatives Worth Comparing

An annuity is not the only way to create a steady income.

Some retirees take income from the TSP through monthly withdrawals. Risk management happens through how the account stays invested.

Others rely on Treasuries or certificates of deposit for near-term spending. The rest of the portfolio stays untouched.

Delaying Social Security frequently results in more guaranteed lifetime income than an annuity purchase.

Looking at these options together usually makes the TSP annuity vs. monthly withdrawals choice clearer. The real question is which risks you want to accept and which ones you want to eliminate.

Certainty Should Never Come at the Expense of Clarity

A TSP life annuity provides a fixed payment and removes market exposure on the annuitized portion. It also eliminates flexibility for those dollars. The decision turns on which tradeoffs matter more during retirement.

Before stepping through a one-way door, get a second opinion.

Reach out to the team at Serving Those Who Serve at [email protected] to talk through whether a TSP annuity fits your retirement plan, or whether another strategy better serves your long-term goals.

The information has been obtained from sources considered reliable but we do not guarantee that the foregoing material is accurate or complete. Any opinions are those of Serving Those Who Serve writers  and not necessarily those of RJFS or Raymond James. Any information is not a complete summary or statement of all available data necessary for making an investment decision and does not constitute a recommendation. Investing involves risk and you may incur a profit or loss regardless of strategy suggested. Every investor’s situation is unique and you should consider your investment goals, risk tolerance, and time horizon before making any investment or financial decision. Prior to making an investment decision, please consult with your financial advisor about your individual situation. While we are familiar with the tax provisions of the issues presented herein, as Financial Advisors of RJFS, we are not qualified to render advice on tax or legal matters. You should discuss tax or legal matters with the appropriate professional. **

TSP: The Thrift Savings Plan (TSP) is a retirement savings and investment plan for Federal employees and members of the uniformed services, including the Ready Reserve. The TSP is a defined contribution plan, meaning that the retirement income you receive from your TSP account will depend on how much you (and your agency or service, if you're eligible to receive agency or service contributions) put into your account during your working years and the earnings accumulated over that time. The Federal Retirement Thrift Investment Board (FRTIB) administers the TSP. Treasury securities are direct obligations of the United States Government. Bond prices and yields are subject to change based upon market conditions and availability. If bonds are sold prior to maturity, you may receive more or less than your initial investment. U.S. government bonds are issued and guaranteed as to the timely payment of principal and interest by the federal government.