The Thrift Savings Plan posted gains across all funds in August 2025. The S Fund, which tracks small- and mid-cap U.S. companies, led the way with a 4.08% return. The C Fund, tied to the S&P 500, advanced 2.03%, while the I Fund bounced back from a weak July to climb 3.95%.
Both the C Fund and S Fund extended their winning streak to four consecutive months of positive performance, supported by strong corporate earnings, continued investor optimism, and growing expectations that the Federal Reserve will lower interest rates in September.
The G Fund, backed by short-term U.S. government securities, delivered its steady 0.37% monthly increase, bringing its year-to-date return to 2.98%. Lifecycle (L) Funds also ended the month higher, with gains ranging from 1.12% for the L Income Fund to nearly 3% for the longest-dated funds, including the new L 2075.
G Fund:
0.37% August
2.98% YTD
4.42% 12 Month
F Fund:
1.19% August
4.99% YTD
3.15% 12 Month
C Fund:
2.03% August
10.76% YTD
15.83% 12 Month
S Fund:
4.08% August
8.96% YTD
15.84% 12 Month
I Fund
3.95% August
21.5% YTD
12.80% 12 Month
The TSP’s total assets continued to grow, reaching $1.017 trillion by the end of August, including $81 billion in Roth balances. That marks an increase from $963 billion in total assets and $73 billion in Roth accounts at the close of 2024.
As of July 31, the average Federal Employees Retirement System (FERS) account balance stood at $205,373 across more than 4.1 million accounts. The average Roth balance for FERS participants was $35,627. In total, the TSP was managing over 7.2 million accounts, a group that includes Civil Service Retirement System (CSRS) participants, uniformed service members in both legacy and BRS plans, and beneficiaries.
Regularly reviewing your TSP allocations can help ensure your investments are aligned with your retirement goals. For guidance, a Federal Retirement Consultant (FRC®) can provide a complimentary analysis and personalized strategy.
