On the May 19, 2026 episode of The Clark Howard Podcast, Clay from Kentucky asked advisor Wes Moss whether to leave roughly $60,000 in a vested state law enforcement pension earning a guaranteed 4% annually, or roll it into the Roth Thrift Savings Plan he now contributes to in his new federal job. “This seems logical to me and has a higher probability of greater returns in the future,” Clay said. Moss agreed, with a key framing: “Clay, this is about opening up your options.”
The stakes are not small. A 4% guarantee sounds safe, but if Clay is in his 40s with two or three decades before he draws on the money, locking $60,000 into a single fixed rate could quietly cost him six figures of purchasing power. The decision is less about chasing returns and more about whether one rate, frozen forever, can do the job inflation will ask it to do.
The verdict: Moss is right, and the math backs him up
Roll it. A 4% guarantee is not bad in isolation, but in this rate environment it is barely keeping up with risk-free Treasuries. The 10-year Treasury yield sits at almost 5%, and the Fed Funds target upper bound is almost 4%. A government bond you could buy this afternoon yields more than Clay’s state plan promises, with no rollover paperwork required.
Moss put the inflation point bluntly: “They’re super low-cost options that can get you exposure to fight against inflation, whereas the guaranteed account’s probably not going to do that over time.” The data supports him. The core PCE index, the Fed’s preferred inflation measure, climbed from 125.79 in May 2025 to 129.279 in March 2026. A 4% nominal return after taxes and inflation is closer to flat than to growth.
Now the compounding math. Sixty thousand dollars compounded at 4% for 20 years grows to roughly $131,000. The same $60,000 compounded at 7%, a reasonable long-run blended return for a TSP portfolio with meaningful equity exposure, grows to about $232,000. Push the timeline to 25 years and the gap widens further. For context on what equity exposure has actually delivered, the S&P 500, tracked by SPDR S&P 500 ETF Trust (NYSEARCA:SPY | SPY Price Prediction), S&P 500, tracked by SPY, returned roughly 27% over the past year, 79% over five years, and 262% over ten years. Past returns are not promises, but they show what the 4% guarantee is being measured against.
The variable that flips the answer
Time horizon is the decisive factor here. If Clay were 63 and planning to draw on the money in two years, the 4% guarantee would look very different. The University of Michigan consumer sentiment reading of 53.3 in March 2026, down from 61.7 in July 2025, reflects an economy where short-horizon investors are rightly nervous about market drawdowns. A guaranteed 4% on money you need next year beats any equity allocation you cannot stomach selling at a loss.
But Clay just took a federal job. He likely has 15 to 25 years before he touches this balance. Over that span, a 4% cap on returns becomes the real risk. And the TSP does not force him into stocks. Moss noted: “If it were me, I would want more optionality. You can still pick the conservative options within TSP.” The G Fund inside TSP offers government-backed fixed income with no principal risk. He keeps the safety floor and adds the ceiling.
What Clay (and anyone in this spot) should actually do
- Confirm the rollover path with both plan administrators. A direct trustee-to-trustee transfer from the state pension to the TSP avoids withholding and the 60-day deadline trap.
- If rolling pre-tax pension money into the Roth TSP, calculate the tax bill. A $60,000 Roth conversion adds $60,000 to taxable income in the conversion year. A traditional TSP rollover defers that tax.
- Pick the TSP allocation deliberately. The C Fund mirrors the S&P 500, the S Fund covers small and mid caps, the I Fund covers international, and the G and F Funds cover fixed income. A target-date Lifecycle fund handles the mix automatically.
- Compare the state plan’s 4% guarantee against the current 10-year Treasury yield near 5% annually. If the guarantee falls further behind risk-free rates, the case to move strengthens.
A guarantee is only valuable when it pays you to give up flexibility. At 4% in a 4.57% Treasury world, with decades to run and inflation still grinding higher, Clay is paying for safety he can build inside the TSP for less.