Last updated: May 30, 2026Reviewed by John Ziesing, FRC

Common TSP Rollover Mistakes Federal Retirees Should Avoid

TSP-specific guide · FERS & CSRS · Updated 2026

Direct Answer

The most common TSP rollover mistakes are rolling 100% of the balance out without modeling the loss of the G Fund, accepting an indirect rollover check (which triggers 20% mandatory withholding), unintentionally converting traditional TSP into a Roth IRA, and forgetting to update beneficiary forms once assets leave TSP.

Why TSP rollovers are different from a generic 401(k)

A TSP rollover isn't the same conversation as a private 401(k) rollover. The TSP offers some of the lowest expense ratios in the industry, the unique G Fund, and federal-specific rules like the age-55 separation rule. Treating it like a generic employer plan often costs federal retirees more than it saves.

Pitfall 1 — Losing the G Fund

The G Fund pays the average yield of medium- and long-term Treasuries while guaranteeing principal. No private investment matches it. If preservation of principal is central to your plan, rolling 100% of TSP into an IRA usually means giving up a tool you can never repurchase.

Pitfall 2 — Taxable-event timing on indirect rollovers

If you take a TSP distribution payable to you instead of arranging a direct trustee-to-trustee transfer, the TSP is required to withhold 20% for taxes. You then have 60 days to deposit the full amount (including the 20% withheld) into the receiving IRA — or the shortfall becomes a taxable distribution plus, potentially, a 10% early-withdrawal penalty. Always insist on a direct rollover.

Pitfall 3 — Partial vs. full rollover, the wrong way

Most federal retirees benefit from a partial rollover: leave enough in TSP to anchor your safe-money allocation in the G Fund, and roll the rest to an IRA where you can buy lifetime income through an annuity, set up Roth conversions, or hold non-TSP investment options. The split should be driven by your income plan, not by what a single advisor or carrier prefers.

Pitfall 4 — Survivor and beneficiary implications

TSP beneficiary designations stop applying to money the moment it leaves TSP. The receiving IRA's beneficiary form takes over. After any rollover, immediately re-confirm beneficiary designations on the IRA, coordinate them with your FERS survivor annuity election, and align everything with your will or trust.

Pitfall 5 — Mishandling Roth TSP versus Traditional TSP

Roth TSP must roll into a Roth IRA; traditional TSP must roll into a traditional IRA (or be intentionally converted to a Roth, which is taxable). Mixing them up creates either an unintended taxable Roth conversion or a basis-tracking nightmare. Always confirm sourcing in writing before the funds move.

Frequently asked questions

Can I roll over my TSP after I retire?

Yes. Once you separate from federal service you can leave the balance in TSP, take installment or partial withdrawals, purchase a TSP life annuity, or roll some or all of it into a traditional IRA, Roth IRA (taxable event), or a qualified plan. The right answer depends on liquidity needs, the role of the G Fund in your plan, Roth conversion runway, and income guarantees you want.

What is the biggest mistake federal retirees make with TSP rollovers?

Rolling 100% of the TSP balance out without a clear reason. The TSP's expense ratios are among the lowest in the industry and the G Fund has no private-market equivalent. A full rollover may be right — but only after the trade-offs are modeled. Most retirees benefit from a partial rollover that keeps part of the balance in TSP and moves the rest to an IRA for income planning.

What is the G Fund and why does it matter?

The G Fund is a TSP-only government securities fund that pays the average yield of medium- and long-term Treasuries with no principal risk. Nothing in the private IRA world replicates it — a private money-market or stable-value fund either carries credit risk or yields less. If preservation of principal is core to your plan, the G Fund alone can justify keeping at least part of the balance in TSP.

What tax mistakes happen on a TSP rollover?

Three common ones: (1) accepting a check made payable to you instead of a direct trustee-to-trustee transfer — the TSP withholds 20% and you have 60 days to deposit the full amount or it becomes taxable; (2) mixing Roth TSP and traditional TSP into the wrong IRA buckets; (3) triggering an unintended Roth conversion. Insist on direct rollovers and confirm Roth versus traditional sourcing in writing.

Should I take a partial rollover instead?

Often yes. A partial rollover lets you keep some balance in TSP — preserving access to the G Fund and the federal age-55 separation rule — while moving the rest to an IRA where you have more carriers, flexible withdrawal options, lifetime income guarantees through an annuity, and beneficiary-level estate planning. The split should be driven by your income plan, not by a one-size-fits-all rule.

What happens to my survivor and beneficiary elections?

TSP beneficiary designations apply only to assets that remain in TSP. Once you roll money to an IRA, the IRA's beneficiary form controls those assets. Update every form so they match the estate plan, and coordinate with any FERS survivor election you've made on your basic annuity.

What about the FERS supplement and age-55 separation rule?

The FERS supplement is separate from TSP and is not affected by a rollover. The federal age-55 separation rule (penalty-free TSP withdrawals if you separate in or after the year you turn 55) only applies to money that stays in TSP — once rolled to an IRA, IRA rules apply. Plan rollovers around your withdrawal timeline, especially if you're between 55 and 59½.

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Educational only — not individualized tax, legal, or investment advice. Federal benefit rules change; always confirm current TSP and IRS guidance and your specific account details before initiating any rollover.

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