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The TSP G fund rate is still relatively high at the start of 2026, sitting at 4.250% for the current TSP loan rate, back to where it was in October 2025.
TSP G Fund: Understanding the Government Securities Investment Option in the Thrift Savings Plan
The Thrift Savings Plan (TSP) is a retirement savings plan for federal employees and members of the uniformed services, offering a variety of investment funds to help individuals plan for their retirement. Among these options, the TSP G Fund stands out as a unique and secure investment choice. The G Fund is an integral part of the TSP, designed to provide a stable and low-risk investment option for participants. This article aims to delve into the complexities of the TSP G Fund, explaining its characteristics, yield and return dynamics, security features, and strategies for maximizing returns.
Learn all about the TSP funds at an upcoming Thrift Savings Plan Webinar.
How does the TSP G Fund Yield and Return work?
The TSP G Fund earns interest based on U.S. Treasury securities, with guaranteed principal and monthly-adjusted yields. It provides a “long-term rate” on short-term securities, meaning it usually pays more than regular short-term Treasury bills, but its biggest risk is lagging behind inflation.
What determines the TSP G Fund Yield?
The TSP G Fund yield, essentially the rate of return on the investment, is determined by the interest rates of the U.S. Treasury securities specifically issued to the TSP. These rates are based on the average market yields of U.S. Treasury securities with four or more years of maturity, adjusted to match the maturity of a one-day security. Therefore, changes in federal interest rates and broader economic conditions directly influence the monthly G Fund yields experienced by investors.
How is the G Fund Rate of Return calculated?
The rate of return for the TSP G Fund is calculated by taking the monthly interest income generated by the assets held in the fund and dividing it by the fund’s asset value at the start of the month. This provides a monthly rate which can be annualized to understand the yearly performance. The TSP G Fund return rates are published regularly by the TSP, reflecting current economic conditions and U.S. Treasury interest rates.
What is the current TSP G Fund Rate Today?
4.250%
An easy way to find the G fund rate today is by looking at the current TSP loan interest rate. You can find those rates on the TSP loan interest rate page.
As of the latest data available, the TSP G Fund rate today is influenced by prevailing Treasury interest rates. This rate can fluctuate monthly based on changes in the broader economic environment and federal monetary policy. For the most up-to-date information on the current TSP G Fund rate, TSP participants should refer to TSP Fund performance reviews published by the Federal Retirement Thrift Investment Board (FRTIB).
Knowledge is Confidence!
G Fund TSP Returns
The historical G fund TSP returns are included below. These returns show the 1, 3, 5, 10, and life of the G fund TSP returns. As of January 2026 the TSP G fund rate today is 4.250%. Time will tell if the higher level of rates in the G fund will continue.
What is the historical performance of the G Fund?
Historically, the G Fund has offered modest but consistent returns, generally ranging between 1% and 2.5% annually over the past decade, as highlighted in various TSP G Fund news articles. The historical performance of the G Fund reflects its role as a safe harbor for retirement investors seeking to protect their principal. While the returns may be lower compared to equity funds during bullish markets, the G Fund remains an invaluable component of a diversified retirement strategy, particularly during economic downturns.
