TSP Funds Continue Gains in September

In September 2025, TSP funds remained positive despite the looming government shutdown. The C Fund gained 3.65%, the S Fund rose 2.04% , and the I Fund jumped 3.16% (25.34% YTD), driven by a steady market with the S&P 500 up 0.4% and the Dow up 0.2% to close out the month. The G Fund lagged at 0.35%.

With the TSP millionaire count at 171,023 as of June 2025, that number will likely increase when the next quarterly figures are released. Given that the average years of service for a TSP millionaire is 28, some of those who are in the club or on the verge of joining may have left federal service amid the recent turmoil. Despite shutdown fears and potential federal job cuts, the TSP has provided investors a bright spot in a turbulent year.

G Fund:
0.35% September
3.34% YTD
4.44% 12 Month

F Fund:
1.09% September
6.14% YTD
2.90% 12 Month

C Fund:
3.65% September
14.80% YTD
17.55% 12 Month

S Fund:
2.04% September
11.18% YTD
16.41% 12 Month

I Fund
3.16% September
25.34% YTD
15.48% 12 Month

Check the allocation of your TSP funds regularly to make sure you’re maximizing performance and building a healthy nest egg for retirement. Need help? A Federal Retirement Consultant (FRC®) can give you a complimentary analysis and tailor a plan to meet your retirement goals.