TSP Rollover to IRA: Should You Keep Your TSP After Retirement?

Rolling your Thrift Savings Plan to an IRA after retirement is simple to execute — and often the wrong move. The TSP has structural advantages that disappear the moment you transfer the money out: access to the G Fund (a government-backed asset that earns long-term Treasury yields with no principal risk), expense ratios so low they beat virtually every IRA investment, and a Rule of 55 penalty exception that evaporates if you roll before age 59½. None of these come back if you change your mind later.

That doesn't mean keeping everything in the TSP is always right either. IRAs offer investment flexibility, simpler Roth conversion mechanics, and estate planning tools the TSP can't match. For most federal employees, the optimal answer is a partial rollover — keep what's unique to the TSP, move what benefits from IRA flexibility — not an all-or-nothing choice.

What the TSP has that no IRA can replicate

The G Fund: a genuinely unique asset

The G Fund is the most underrated asset in the federal benefits system. It is invested in U.S. Treasury securities specially issued to the TSP, earns a rate pegged to a weighted average of medium- and long-term Treasuries, and carries an explicit U.S. government guarantee of principal — meaning the value cannot go down regardless of what interest rates do. As of the most recent TSP publication, the G Fund has earned approximately 4.4% annually over the trailing 12 months.¹

No equivalent exists in an IRA. You can buy Treasury bonds in an IRA, but a Treasury bond purchased at a premium will lose principal if rates rise. Money market funds in an IRA don't carry a government principal guarantee and typically yield less. The G Fund is the only investment vehicle in the U.S. that pays a long-term interest rate with absolute principal protection — and it is available only to TSP participants and beneficiary participants.

Once you roll out of the TSP, you lose G Fund access permanently. If you roll back into the TSP (allowed for new federal service contributions), the G Fund is available again — but most retirees don't return to federal service.

Expense ratios that beat almost everything

TSP expense ratios for 2025/2026 are 0.033% to 0.034% across all funds — approximately $0.34 per $1,000 invested per year.² According to TSP's own reporting, less than 1% of the roughly 170,000 investment funds tracked by FactSet report total expenses below the TSP average.

IRA mutual funds and ETFs are often cheaper than they used to be, but the average actively managed fund still charges 0.50–1.00%, and even low-cost index funds at major brokerages typically run 0.03–0.10% — similar to or higher than TSP. On a $700,000 traditional TSP balance, the difference between 0.034% (TSP) and 0.10% (a good IRA index fund) is roughly $462 per year, compounding. It's not a reason to avoid rolling over entirely, but it's a real number.

Rule of 55 penalty exception

If you separate from federal service in the calendar year you turn 55 or later — whether through retirement, RIF, or resignation — you can take TSP distributions without the 10% early withdrawal penalty under IRC § 72(t).³ This applies even if you're only 55 or 56 and won't reach 59½ for years.

The Rule of 55 applies only to funds left in the TSP. If you roll your TSP to an IRA before age 59½, those funds are now subject to standard IRA rules — which require age 59½ or a Substantially Equal Periodic Payment (SEPP 72(t)) arrangement to access penalty-free. Rolling out before 59½ is the single most common and most expensive mistake made by early-retiring federal employees.

Beneficiary participant account for surviving spouse

When a TSP participant dies and names a spouse as beneficiary, the spouse can open a TSP beneficiary participant account and maintain TSP access — including the G Fund. This is available only to surviving spouses (not other beneficiaries) and only when the spouse benefit balance is $200 or more.⁴ If you roll out of the TSP entirely, your spouse never gains access to a beneficiary participant account if you die before your spouse. For couples where one spouse wants G Fund access in later retirement, this matters.

What IRAs offer that the TSP doesn't

Investment flexibility

The TSP has five core funds (G, F, C, S, I) plus lifecycle funds. If you want international small-cap exposure, sector ETFs, REITs, individual bonds, preferred shares, or alternative investments, you can't do it in the TSP. For most retirees with a straightforward FERS-annuity-plus-TSP income picture, five well-diversified funds is sufficient. But if you have a complex investment strategy that requires specific asset classes, an IRA gives you access to essentially the full universe of investments.

Roth conversion flexibility

The most compelling reason to roll traditional TSP to a traditional IRA is often Roth conversion strategy. Federal employees who retire at 57–62 typically have a multi-year window when their income is lower than it will be after Social Security begins — a window to convert traditional balances to Roth at favorable tax rates before RMDs start forcing distributions. (See FERS Roth Conversion Strategy for the full framework.)

In-service Roth conversions within the TSP are not available. After separation, the TSP allows in-service-equivalent conversions only through age-59½ partial withdrawals (if you're still employed) — not post-retirement. To do systematic partial conversions from traditional to Roth, you need to either use the TSP in-plan conversion (not available post-separation) or roll to a traditional IRA and convert from there. An IRA at a major brokerage gives you complete control: convert any dollar amount, in any year, at the moment that's most tax-advantageous.

Estate planning and beneficiary flexibility

TSP beneficiary designations (Form TSP-3) are relatively inflexible. TSP does not allow per stirpes designations, trust distributions, or conditional beneficiary structures. Non-spouse beneficiaries of a TSP receive a one-time distribution — they cannot open a beneficiary participant account or stretch distributions the way a properly structured inherited IRA can (within the SECURE 2.0 10-year rule).

If your estate planning involves a trust as beneficiary, multiple beneficiaries with unequal allocations, or anything more complex than "spouse then children equally," an IRA at a custodian that supports per stirpes and trust beneficiaries gives you more tools. (See Federal Employee Estate Planning for the full picture of how TSP beneficiary designations interact with your estate plan.)

Tax mechanics of rolling over

Direct rollover: the only acceptable method

A direct rollover — where the TSP transfers funds directly to your IRA custodian (trustee-to-trustee) — generates no immediate tax event and no withholding. You complete TSP's rollover request form, provide your IRA account and custodian information, and TSP wires the money directly. This is the correct method.

Indirect rollover: the 60-day trap

An indirect rollover is when TSP sends the check to you rather than your IRA custodian. On traditional (pre-tax) TSP funds, TSP is required by law to withhold 20% of the distribution for federal taxes — even if your intent is to deposit the full amount into an IRA within 60 days. To complete a tax-free rollover, you'd have to deposit the full original amount into the IRA within 60 days, funding the withheld 20% from your own savings. The withheld amount is returned as a tax refund when you file your return, but most people don't have the extra cash sitting around. Avoid indirect rollovers.

Which rollover type is taxable?

• Traditional TSP → Traditional IRA: No tax event. Tax-deferred status continues. Ordinary income tax applies when you eventually take distributions.
• Roth TSP → Roth IRA: No tax event. Tax-free status continues. Note the 5-year clock question below.
• Traditional TSP → Roth IRA: This is a Roth conversion. The full converted amount is taxable ordinary income in the year of the rollover. Do this strategically if at all — in a low-income year, below the IRMAA cliff, spread across multiple years.

RMD carve-out rule

If you are subject to Required Minimum Distributions in the year you roll over — age 73 for those born 1951–1959, or age 75 for those born 1960+ under SECURE 2.0 — your RMD must be satisfied from your traditional TSP balance first, before any rollover is permitted.⁵ Example: $800,000 traditional TSP, $32,000 RMD for the year. If you request a full rollover, TSP distributes the $32,000 RMD to you (taxable, not rollable) and rolls the remaining $768,000 to your IRA. Plan accordingly.

The IRMAA trap for large rollovers

Rolling traditional TSP to a Roth IRA — a Roth conversion — counts as ordinary income in the year of the rollover. A large single-year conversion can spike your Modified Adjusted Gross Income (MAGI) and trigger or increase Medicare IRMAA surcharges two years later. The 2026 IRMAA first-tier threshold is $109,000 for single filers and $218,000 for married filing jointly.⁶ At the first tier, Medicare Part B premiums increase by $74.00 per month per person — $1,776/year for a couple.

If you're doing Roth conversions via an IRA, spread them over multiple years, stay under the IRMAA threshold, and model the two-year lookback. A $100,000 traditional-to-Roth conversion in 2026 affects your 2028 Medicare premiums. See FERS Roth Conversion Strategy for the full bracket and IRMAA management framework.

Roth TSP to Roth IRA: the 5-year clock question

When you roll Roth TSP to a Roth IRA, the receiving account's 5-year qualified distribution clock applies — not the Roth TSP's clock. If you already have a Roth IRA that has been open for 5+ years (from January 1 of the year of your first Roth IRA contribution), the rolled funds inherit that clock immediately and are eligible for tax-free qualified distributions if you're also over 59½.⁷

If you have never contributed to a Roth IRA before, the 5-year clock starts when you open the new Roth IRA to receive the Roth TSP rollover. Contributions to Roth TSP do not start the Roth IRA clock. For most federal employees who have had a Roth IRA for years alongside their Roth TSP, this is not an issue. For those who have never had a Roth IRA, consider opening one with a small contribution as early as possible, even before you intend to roll the Roth TSP.

The partial rollover: keep what's unique, move what benefits from flexibility

Most federal retirees are best served by splitting their TSP rather than making a wholesale transfer. The logic:

1. Keep the G Fund allocation in TSP. Whatever portion of your portfolio you'd allocate to "safe" fixed income (Treasuries, stable value) should stay in the TSP to access the G Fund. This gives you the unique principal protection and approximately 4% yield with no duration risk. You cannot replicate this elsewhere.
2. Keep enough traditional TSP to cover your spending needs through age 59½ if you're retiring before that. The Rule of 55 means you can tap this money penalty-free as needed — don't eliminate that flexibility by rolling prematurely.
3. Roll the equity portion of your traditional TSP to a traditional IRA once you've passed 59½ (or once you're confident you won't need penalty-free access). This gives you investment flexibility and positions you for systematic Roth conversions from the IRA.
4. Roll Roth TSP to a Roth IRA when you want to consolidate and gain conversion flexibility. Roth TSP has no RMDs since SECURE 2.0 § 325 (for plan years after 2023), so there's less urgency — but consolidation to a Roth IRA is often cleaner for estate planning and multi-year conversion tracking.

When a full rollover to IRA makes sense

A complete TSP-to-IRA rollover is the right move in a narrower set of circumstances:

• You're over 59½ and don't need the Rule of 55 exception for anything.
• Your estate plan requires a trust as beneficiary, per stirpes, or other beneficiary structure the TSP can't handle.
• Your investment strategy requires asset classes outside G/F/C/S/I funds (e.g., real estate investment trusts, individual bonds, emerging markets).
• Your entire portfolio is traditional (no Roth balance) and you've planned a specific multi-year Roth conversion from an IRA that's optimized for bracket management.
• Your surviving spouse will not need G Fund access — either because you have other stable-value assets, or because your spouse's own assets make it irrelevant.

If none of these apply, the default is to keep TSP — or at minimum, keep the G Fund allocation and Rule of 55 bridge — and roll only the equity/growth portion once the penalty exception is no longer needed.

GS-14 worked example: partial rollover in practice

Maya, a GS-14 Step 9 in the Washington DC area, retires at age 57 with a FERS annuity of $67,200/year and a TSP balance of $920,000: $730,000 traditional (currently allocated 60% C/S/I, 40% G Fund), and $190,000 Roth TSP. She opened a Roth IRA 8 years ago with a $500 contribution. She won't reach 59½ for 30 months.

At age 59½, Maya executes a partial rollover of the $438,000 equity block (now grown) to a traditional IRA at a low-cost brokerage, gaining access to international small-cap and REIT funds not available in the TSP. She keeps the G Fund block — now approximately $310,000 after two years of growth — in the TSP permanently as her "safe money" allocation. Each year she converts $90,000 from the traditional IRA to Roth (staying below the $109,000 IRMAA first-tier threshold as a single filer), using the pre-Social Security tax window before her filing age of 67.

The G Fund stays in TSP for life. Her Roth IRA absorbs the Roth TSP rollover and the converted traditional IRA amounts over a decade. Her surviving spouse inherits a TSP beneficiary participant account with G Fund access. She did not do a full rollover — she did the right rollover.

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