TSP G Fund Rate for October 2026: 5.375%

The G Fund invests in special U.S. Treasury securities issued only to the TSP. Its interest rate is reset each month to match the average yield on longer-term Treasury securities, and your principal and interest are guaranteed by the U.S. government. That's why the G Fund's share price rises a little almost every day and doesn't fall with the markets. The trade-off is that, over long periods, it has grown more slowly than the TSP's stock funds and may not keep up with inflation.

The G Fund rate right now

October 2026: 5.375%, up from 4.875% in September (the latest month confirmed on tsp.gov). That's an annual rate. The G Fund earns it a day at a time, which is why the share price ticks up almost every day. The Treasury sets a new rate at the start of each month.

Where this number comes from: tsp.gov's loans page lists the current TSP loan rate as 5.375% (checked November 1, 2026), and the TSP sets the loan rate equal to the G Fund rate for the month before the loan request, so October 2026's G Fund rate was 5.375%. The TSP doesn't publish the current month's rate on a public page; this page adds each month once it can be confirmed.

The rate is an interest rate, not a return you can lose. What you actually earn depends on how long your money stays in the fund.

See today's price and its returns by year.

G Fund rate history

Rates last updated November 1, 2026.

How the G Fund interest rate is set

• The U.S. Treasury sets the rate once a month.
• It equals the average market yield on outstanding Treasury notes and bonds with 4 or more years to maturity, weighted by how much of each is outstanding.
• The Treasury securities in that average have a weighted average maturity of about 13 years, so the G Fund earns a longer-term interest rate.
• The G Fund's own securities are short-term, so their value doesn't drop when interest rates rise.

That combination is unusual. Most bond investments that pay long-term interest rates lose value when rates rise. The G Fund doesn't, because it's built differently by law.

Why the G Fund's price almost never goes down

Interest is added every day, so the share price moves up by a tiny amount each day. It doesn't track a market index, so stock and bond selloffs don't pull it down. A day marked "0.00%" usually means the rounded gain was too small to show.

What happens in a debt-ceiling standoff

When the U.S. reaches its borrowing limit, the Treasury can temporarily stop investing part of the G Fund's money in Treasury securities as a way to stay under the limit. It has done this during several debt-ceiling standoffs. By law, once the standoff ends, the Treasury restores the G Fund in full, including all the interest it would have earned. The TSP has said participants' G Fund balances are protected throughout, and account balances and daily share prices aren't affected.

The trade-off

Because its principal and interest are guaranteed by the U.S. government, the G Fund avoids the big drops that stock funds sometimes have. It also means it misses stock-market gains. Over long periods its growth has been much lower than the C, S and I Funds', and in years of high inflation it can grow more slowly than prices rise. Many participants hold some G Fund alongside other funds; the TSP's L Funds, for example, shift toward the G and F Funds as their target date approaches. How much to hold is a personal decision.

Common questions

What is the TSP G Fund rate right now?

The latest rate confirmed on tsp.gov is 5.375% for October 2026, up from 4.875% in September. The U.S. Treasury resets the G Fund rate at the start of every month, and this page lists the latest rate.

Can the G Fund lose money?

The G Fund is designed not to. Your principal and interest are guaranteed by the U.S. government, and its share price is not affected by market moves. Its growth may not keep pace with inflation.

How is the G Fund rate calculated?

Each month the U.S. Treasury sets it equal to the average market yield on outstanding Treasury notes and bonds with 4 or more years to maturity, weighted by the amount outstanding.

What happens to the G Fund during a debt-ceiling crisis?

The Treasury may temporarily suspend some G Fund investments to stay under the debt limit. By law it must make the G Fund whole with all lost interest once the limit is resolved, and participants' balances are protected.

Is the G Fund the same as the F Fund?

No. The F Fund holds a broad index of investment-grade bonds whose prices go up and down with interest rates. The G Fund holds special Treasury securities whose principal and interest are guaranteed by the U.S. government.

Sources

• tsp.gov: G Fund
• TSP fund information sheet
• tsp.gov: TSP loans: the loan rate equals the previous month's G Fund rate

Educational information, not investment advice. Past performance does not guarantee future results.