The TSP Annuity Option: When the MetLife Lifetime Income Choice Makes Sense

The TSP Annuity: A Lifetime Income Option Most Federal Employees Skip — Sometimes for Good Reason

When you separate from federal service, your Thrift Savings Plan gives you several ways to draw down your balance: leave it invested, take installments, take partial withdrawals, transfer to an IRA, or — the option almost nobody chooses — buy a TSP life annuity. According to TSP statistics, fewer than 1% of separating participants elect the annuity option. There are real reasons for that. There are also real situations where the TSP annuity is genuinely the best choice on the menu. Most federal employees never bother to find out which group they’re in.

This post explains exactly what the TSP annuity is, how it differs from your FERS pension (they are not the same thing), what the trade-offs are, and how to figure out if it deserves a place in your retirement plan.

What the TSP Annuity Actually Is

A TSP life annuity is an insurance contract you purchase using some or all of your TSP balance. The TSP partners with a single outside provider — currently MetLife — to issue the contract. You hand over a chunk of your TSP money. In exchange, MetLife sends you a fixed monthly payment for life. Once you sign the contract, the decision is irrevocable: you cannot change your mind, switch annuity types, or take a lump sum back out.

The minimum amount you can use to buy a TSP annuity is $3,500. The maximum is your entire vested TSP balance. You can also blend the annuity with other withdrawal options — for example, use $200,000 of a $500,000 balance to buy an annuity and take the rest as periodic installments.

How It Differs From Your FERS Pension

This is the single biggest source of confusion. Federal employees often hear “annuity” and assume it’s connected to their FERS pension. It’s not.

• Your FERS pension is a defined-benefit pension paid by OPM. It’s based on your high-3, years of service, and a multiplier (1% or 1.1%). It comes with COLAs, survivor benefits, and FEHB continuation rights.
• The TSP annuity is a defined-contribution payout. It’s based on how much money you put into the contract, your age, current interest rates, and the options you select. It is not a government pension. It’s a private annuity from MetLife.

If you’d like a refresher on how the FERS pension itself is calculated, our step-by-step FERS pension guide walks through the formula in plain English.

The Annuity Options You Can Choose

The TSP annuity isn’t a single product. You build the contract from a menu of features:

Single Life vs. Joint Life

Single life annuities pay you for life and stop when you die. Joint life annuities pay for as long as either you or a designated joint annuitant (usually a spouse) is alive. Joint life pays a smaller monthly amount because it’s covering two lives.

Survivor Percentage (Joint Life)

For joint life annuities, you choose whether the survivor receives 100% or 50% of the original payment after the first annuitant dies. 50% survivor benefit produces a higher initial monthly payment than 100%.

Level vs. Increasing Payments

You can take level payments (the same dollar amount every month for life) or increasing payments (annual increases up to 3% based on inflation, capped). Increasing payments start lower but grow over time. Level payments start higher but lose purchasing power to inflation.

Cash Refund / 10-Year Certain Features

You can add a cash refund feature (if you die before recovering your purchase amount, the difference goes to your beneficiary) or a 10-year certain feature (payments are guaranteed for at least 10 years even if you die early). Both reduce your monthly payment.

Pros: When the TSP Annuity Makes Sense

1. Longevity Risk Protection

The single best reason to buy any annuity is to insure against living longer than you expect. If you have a strong family history of longevity, are healthy at retirement, and worry about outliving your assets, an annuity provides a paycheck you cannot exhaust. Combine the TSP annuity with your FERS pension and Social Security and you may be able to cover essential expenses with guaranteed lifetime income.

2. Behavioral Simplicity

Some retirees genuinely don’t want to manage a portfolio in their 70s and 80s. An annuity removes the investment management burden entirely. The check shows up. You spend it.

3. Pricing Through TSP Beats Many Retail Annuities

Because the TSP buys in bulk and there’s no commissioned salesperson, the TSP annuity is generally priced more favorably than retail annuities sold by individual agents. If an annuity is the right tool for you, doing it through TSP is usually cheaper than doing it through an outside broker.

Cons: Why Most Federal Employees Pass

1. Irrevocability

You cannot undo it. If interest rates rise, you can’t reset the contract. If you have a major health crisis and need a lump sum, you can’t access the principal. If your spouse dies, your monthly payment doesn’t change. The trade-off for guaranteed income is total inflexibility.

2. No Inheritance Beyond Surviving Annuitant

Unless you add the cash refund or 10-year certain feature, when both annuitants die, the contract terminates and there is nothing left. Heirs receive zero. Compare that to a TSP balance you keep invested — your beneficiaries can inherit anything that’s left. (We covered the importance of those forms in our TSP beneficiary designations post.)

3. Inflation Erosion

Even the increasing-payment option is capped at 3% per year. In a high-inflation environment, your purchasing power can erode meaningfully over a 25-30 year retirement.

4. Interest Rate Sensitivity

Annuity payouts are largely a function of the prevailing 10-year Treasury yield at the moment you purchase. Buy when rates are low, and you lock in a low payment for life. The May 2026 environment offers higher rates than the 2020-2022 lows, so the math is more favorable than it has been — but rates can move either direction.

5. You Already Have an Annuity

Your FERS pension and Social Security are both inflation-adjusted lifetime annuities backed by the federal government. For many federal retirees, that’s already enough guaranteed lifetime income. Adding a third annuity layer can be redundant.

How to Run the Math

The TSP provides an annuity calculator at tsp.gov that estimates monthly payments for any combination of options. Plug in your age, balance you’re considering, joint life vs. single life, level vs. increasing, and any add-ons. The number that comes back is what MetLife will actually pay you.

Then compare it to a sustainable withdrawal rate from a managed portfolio. A common benchmark is 4% per year. If you have $300,000 and the TSP annuity quote is $1,650/month ($19,800/year), that’s a 6.6% payout — higher than 4%. The trade-off is that the 4% portfolio leaves an inheritance and adjusts for inflation more freely; the annuity does neither but won’t run out.

For a broader comparison of withdrawal approaches, see our guide to TSP withdrawal options.

A Practical Framework

If you’re trying to decide whether the TSP annuity belongs in your plan, work through these questions:

• Will my FERS pension and Social Security cover my essential expenses (housing, food, health care, utilities)?
• Do I have other assets (TSP, IRA, brokerage, home equity) outside the annuity decision?
• Am I worried about behavioral risk — making bad decisions with a portfolio later in life?
• Do I have a strong family longevity profile?
• Do I want to leave money to heirs?

Federal employees whose pension and Social Security cover essentials, who have other assets, and who want to leave inheritance generally don’t need the TSP annuity. Federal employees with smaller pensions, longer life expectancies, no heirs, or strong longevity concerns may find it useful — typically for a portion (not all) of their TSP balance.

Get Personalized Guidance

The decision to annuitize part of your TSP intersects with your tax plan, your survivor benefit election, your FEHB and Medicare strategy, and your overall income floor. Run the wrong scenario and you can lock in a payment that hurts your retirement for decades. Our free Fed Pilot federal retirement workshop walks through how the TSP annuity option fits — or doesn’t — alongside your other income sources. Register for an upcoming session to see the comparison run with your actual numbers.