TSP G Fund rate today and share prices: what they are and where to read them

By the OnPAR Federal Retirement Education editorial team · Last updated November 7, 2026

Related: TSP funds guide (G, C, F, S, I, L) · TSP overview · TSP withdrawal options · TSP calculator · TSP login help

Short answer: The G Fund holds special U.S. Treasury securities issued to the TSP. Its share value does not swing with the stock market — only the interest rate changes. The U.S. Treasury sets that rate monthly from a weighted average yield of Treasury securities on the last day of the prior month.[1] For today’s share prices (G, C, F, S, I and the L Funds), use TSP’s official share price history page.[2] For longer-term performance, use rates of return.[3] We do not republish a live rate here — always read the number on tsp.gov.

What the G Fund rate means in plain English

• Principal protection: Payment of G Fund principal and interest is guaranteed by the U.S. government. TSP describes no credit risk; the value of G Fund securities does not fluctuate.[1]
• Inflation risk: Your account may not grow enough to keep up with rising prices.[1]
• Monthly rate, daily shares: Interest accrues so the G Fund share price drifts upward slowly each business day; stock funds (C/S/I) can move a lot day to day.[1][2]
• Expense ratio: As listed on the G Fund page, the total expense ratio was 0.034% as of December 31, 2025 ($0.34 per $1,000).[1]

How this fits a FERS withdrawal plan

Many FERS retirees mix a guaranteed pension, optional Social Security timing, and TSP withdrawals. The G Fund is often used for money you may need soon or want to keep stable, while C/S/I (or an L Fund) aim for longer-term growth with more ups and downs.[1][4] This is education, not investment advice. Before you move money:

1. Write down near-term spending needs (1–3 years) vs longer-term money.
2. Look up today’s G and C share prices on TSP’s share-price page so you know what a transfer would do.[2]
3. Review withdrawal options (installments, annuity, partial/full) on our TSP withdrawal options guide.
4. Compare with your FERS pension and any supplement — see FERS retirement income sources.

Questions and answers

Where is the current G Fund interest rate published?

On TSP’s official G Fund page and related performance tools at tsp.gov. The rate is set monthly by Treasury from prior-month yields. Always verify on tsp.gov rather than a third-party tracker.[1]

Where are today’s C Fund and other share prices?

On tsp.gov/share-price-history. Prices update each business day after markets close.[2]

Does the G Fund share price go down?

TSP states the value of G Fund securities does not fluctuate; only the interest rate changes. Other funds can lose value.[1]

Official sources

1. TSP: G Fund
2. TSP: Share price history (daily prices)
3. TSP: Rates of return
4. TSP: Individual funds

Checked against OPM, TSP.gov and SSA on November 7, 2026. Education only, not legal, tax or financial advice. Your own situation may differ: check with the TSP, OPM, SSA or a tax professional. Not affiliated with OPM, the TSP, SSA or any government agency.