Leaving federal service or approaching retirement in 2026 means facing one of the more consequential financial decisions of your career: what to do with your Thrift Savings Plan balance. Federal employees and members of the uniformed services have several TSP rollover options available to them, and each path carries different tax rules, investment choices, and long-term implications. Unfortunately, many people rush this decision or rely on outdated information, leading to mistakes that can be costly and difficult to reverse. This article walks through the most common missteps people make when evaluating TSP rollover options, so you can approach your own decision with more clarity.

Why TSP Rollover Decisions Deserve Extra Attention

The Thrift Savings Plan is known for its low administrative costs and simple fund lineup. When you separate from federal service, retire, or reach a certain age, you generally have a handful of choices: leave your money in the TSP, roll it into an IRA, roll it into a new employer’s retirement plan, take a partial withdrawal, or cash out entirely. Each of these paths has trade-offs. Because the TSP does not automatically move your money anywhere when you leave your job, the responsibility falls on you to make an informed choice — and that’s where mistakes tend to happen.

Mistake 1: Assuming You Must Move Your Money Right Away

One of the most common misunderstandings is thinking that leaving federal employment forces an immediate decision about your TSP account. In most cases, this isn’t true. If your balance is above the minimum threshold, you can typically leave funds in the TSP indefinitely, even after you stop contributing.

The mistake here works both ways. Some people rush into a rollover out of fear that they’ll lose access to their account, when in fact they had time to research their options carefully. Others assume they can leave money in the TSP forever without ever revisiting the decision, missing opportunities that might better suit their retirement income needs down the road. A more balanced approach is to treat the rollover decision as something to evaluate thoughtfully, not something to react to under pressure.

Example: The Rushed Rollover

Consider someone who retires in early 2026 and immediately rolls their entire TSP balance into an IRA within the first week, without comparing fund expense ratios or investment options. A few months later, they realize the TSP’s low-cost index funds may have suited their needs just as well, if not better, than the new account. Taking a few extra weeks to compare options before acting could have avoided this.

Mistake 2: Confusing a Rollover With a Withdrawal

This is a technical distinction, but it matters enormously for taxes. A direct rollover moves funds from the TSP to another qualified retirement account, such as a traditional IRA or a new employer’s plan, without triggering immediate taxation. An indirect rollover involves the funds being paid to you first, and then you have a limited window (typically 60 days) to deposit the full amount into another retirement account.

The mistake many people make is choosing an indirect rollover without understanding that the TSP is generally required to withhold a portion for federal taxes. That means if you don’t make up the withheld amount out of pocket when redepositing the funds, you could end up owing taxes and possibly penalties on the shortfall. When exploring TSP rollover options, a direct rollover is usually the simpler and less risky route for most people, since it avoids this withholding complication altogether.

Mistake 3: Overlooking the Roth and Traditional Balance Split

Many TSP participants have both a traditional (pre-tax) balance and a Roth (after-tax) balance within the same account. A frequent oversight is failing to account for this split when rolling funds over. Traditional TSP funds generally need to go into a traditional IRA or another pre-tax account to maintain their tax treatment, while Roth TSP funds should go into a Roth IRA or Roth account to preserve their tax-free growth status.

Mixing these up, or not communicating clearly with the receiving institution, can create tax headaches that take months to untangle. Before initiating any transfer, confirm with both the TSP and the receiving custodian exactly how each portion of your balance will be handled.

Mistake 4: Not Comparing Investment Costs and Fund Choices

The TSP is well regarded for having some of the lowest expense ratios in the retirement plan industry. When people roll their balance into an IRA or another employer plan, they sometimes don’t compare the new account’s fees against what they were paying in the TSP. Over decades, even a seemingly small difference in annual fees can add up to a meaningful amount of lost growth.

This doesn’t mean staying in the TSP is automatically the better choice. Some IRAs offer access to a broader range of investments, more flexible withdrawal strategies, or planning tools that the TSP doesn’t provide. The mistake is not making the comparison at all. Before deciding among your TSP rollover options, it’s worth requesting a clear breakdown of fees and available funds from any institution you’re considering.

Example: The Overlooked Fee Comparison

Imagine a retiree who moves their balance to an IRA recommended by a family member, without checking the underlying fund expense ratios. A year later, they discover the mutual funds in the new account charge noticeably more than the TSP’s index funds did. This kind of oversight is avoidable with a simple side-by-side comparison before signing any paperwork.

Mistake 5: Ignoring Required Minimum Distribution Rules

Once you reach the age when required minimum distributions (RMDs) begin, both the TSP and traditional IRAs are subject to these rules, though the calculation details can differ slightly depending on where your money sits. A mistake some retirees make is rolling money between accounts in the same year RMDs are due without first taking the distribution that was required from the original account. This can result in a missed RMD, which may carry a tax penalty.

If you’re near or past the age when RMDs apply, it’s worth confirming with a tax professional or the receiving institution exactly how the timing works before completing any transfer.

Mistake 6: Choosing a Full Withdrawal for the Wrong Reasons

Cashing out a TSP balance entirely is sometimes appropriate, but it’s also one of the more consequential TSP rollover options because it removes funds from tax-advantaged growth altogether. A common mistake is choosing a lump-sum withdrawal simply because it feels simpler than researching a rollover, without fully considering the tax bill that comes with it in the same year.

For traditional balances, a full withdrawal is generally treated as taxable income in the year it’s received, which can push someone into a higher tax bracket than expected. Before choosing this route, it helps to estimate the tax impact using a calculator or by consulting a tax advisor, rather than assuming it will be straightforward.

Mistake 7: Not Reviewing Beneficiary Designations After a Rollover

This is a detail that’s easy to forget. When you move money from the TSP into a new IRA or employer plan, your beneficiary designations do not automatically carry over. Each account has its own beneficiary form, and if you don’t update it, your assets could end up going to someone you didn’t intend, or through a longer probate process than necessary.

After completing any rollover, take a few minutes to confirm or update your beneficiary

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