We work with federal employees across Maryland, Virginia, and Washington DC — from the Pentagon to NIH to the Treasury — and the same five TSP mistakes show up again and again in the final years before retirement. None of them are about picking the "wrong" fund. They're about timing, taxes, and not having a coordinated retirement income planning strategy.
Mistake #1: Staying 100% in the C Fund Too Long
The C Fund's long-run average return is seductive, but averages hide the years that matter most — the ones right before and after you stop contributing new money. A market drop in your final working year, combined with early withdrawals, can permanently shrink your balance in a way that years of later growth can't fully repair. This is called sequence-of-returns risk, and it's one of the most overlooked threats in federal employee retirement planning.
Mistake #2: Ignoring the TSP Loan Trap
TSP loans feel harmless because you're "paying yourself back." In reality, you repay the loan with after-tax dollars, and that money gets taxed again when you eventually withdraw it in retirement — a form of double taxation most employees never realize they're accepting. Loans also pull money out of the market during your working years, quietly cutting into decades of compounding.
Mistake #3: Not Understanding RMD Rules
Required Minimum Distributions apply to your TSP just like a traditional IRA once you reach the applicable age. Employees who haven't coordinated their TSP withdrawals with other income sources — a pension, Social Security, a 401(k) to IRA rollover advisor account from prior private-sector work — often get pushed into a higher tax bracket than necessary in their 70s.
Key Takeaways
- Sequence-of-returns risk can permanently reduce your balance if a downturn hits right before retirement.
- TSP loans are repaid with after-tax dollars, then taxed again on withdrawal.
- RMDs from TSP stack with pension and Social Security income and can push you into a higher bracket.
- Leaving funds untouched with no beneficiary review is one of the most common estate-planning gaps.
- A one-time TSP checkup with a certified financial fiduciary in Maryland can catch these issues years before retirement.
Mistake #4: Forgetting to Update Beneficiaries
TSP beneficiary designations override your will. We regularly meet federal employees whose TSP still lists an ex-spouse or a beneficiary from decades ago. Coordinating your TSP beneficiaries with your broader legacy and estate planning services — including your Last Will & Testament planning — is a five-minute fix that prevents years of family conflict.
Ledger Note
TSP participants who review beneficiaries alongside their estate documents at least once every three years, or after any major life event, avoid the vast majority of post-mortem disputes we see in probate.
Mistake #5: Never Exploring a Rollover Strategy
Staying in TSP isn't wrong — but never even evaluating a TSP qualified IRA rollover means you may be missing access to tax-free retirement account (TFRA) structures, principally protected S&P 500 index strategies, and more flexible income planning available outside the plan. The right move depends entirely on your numbers.
The TSP rewards discipline during your career and punishes silence in the five years before you retire.
Why This Matters More If You're Near DC
Federal employees clustered around Washington DC, Bethesda, Silver Spring, and Northern Virginia often carry unusually large TSP balances relative to their overall net worth, simply because federal service tends to be a full career rather than one stop among several employers. That concentration makes thrift savings plan rollover strategy decisions higher-stakes than they'd be for someone with several smaller retirement accounts spread across past jobs. It's also why we built our practice around federal retirement specifically, rather than treating thrift savings plan rollover strategy as one line item among many. Families relocating between Maryland, Virginia, and Washington DC across a federal career add another layer worth reviewing with a certified financial fiduciary in Maryland — state tax treatment of retirement income differs meaningfully across the three, and where you eventually retire can change the math on withdrawal timing.
Frequently Asked Questions
Does a TSP loan hurt my credit?
No — TSP loans aren't reported to credit bureaus. The cost is financial, not credit-related: you lose market growth on the borrowed amount and repay with after-tax dollars that get taxed again later.
What age do TSP RMDs start?
TSP required minimum distributions generally follow the same age rules as traditional IRAs under current federal law. Because the exact age has changed with recent legislation, confirm your specific RMD age with a planner or the TSP directly.
How often should I review my TSP beneficiaries?
At minimum every three years, and immediately after marriage, divorce, a new child or grandchild, or the death of a listed beneficiary.