The U.S. government is paying more to carry its debt than at any point since the aftermath of the financial crisis. The average interest rate across all interest-bearing Treasury securities climbed to 3.41% in June 2026, up from 3.35% in May, according to figures the Treasury Department publishes through its Fiscal Data portal. That is the highest average rate since 2009. The increase follows a straightforward mechanic. As bonds and notes issued during the near-zero-rate years mature, the Treasury replaces them at current yields of roughly 4% to 5%, pulling the blended rate on the entire $39.59 trillion debt higher month after month. The cost is already visible in the budget. Gross interest on the public debt topped $1.05 trillion in the first nine months of fiscal 2026, keeping interest among the largest single expenses the federal government carries. The timing is pointed this week. The Treasury returns to the market on July 22 with a $13 billion reopening of the 20-year bond and follows with a $21 billion 10-year note on July 23, testing investor appetite at yields that keep the refinancing squeeze running. For a live view of these costs, see our interest on the national debt tracker and the broader U.S. debt hub.
Key Takeaways
- The average rate on interest-bearing Treasury debt rose to 3.41% in June, up from 3.35% in May.
- That is the highest blended rate the Treasury has paid since 2009.
- Gross interest costs passed $1.05 trillion in the first nine months of fiscal 2026.
- Maturing low-coupon debt refinancing at 4% to 5% yields keeps the average climbing.
- Treasury sells a $13 billion 20-year bond July 22 and a $21 billion 10-year note July 23.
What the June number shows
The Treasury reported that the weighted average interest rate on all interest-bearing debt reached 3.409% at the end of June, which rounds to 3.41%. The figure covers every marketable and non-marketable security the government has outstanding, from four-week bills to 30-year bonds and the special issues held by trust funds. May came in at 3.35%, and the rate has risen in every month of 2026 so far. The last time the government paid this much on average was July 2009, when the blended rate stood at 3.42%. Marketable debt, the portion sold at public auction, carried an even higher average of 3.41% in June.
The move looks small in isolation. A shift from 3.35% to 3.41% is six hundredths of a percentage point. Applied to a debt that now stands near $39.6 trillion, though, small changes carry real money. Each additional tenth of a point on the full balance is worth roughly $40 billion in annual interest once the debt fully reprices. That is why the June reading matters beyond the decimal. It confirms that the repricing of the federal balance sheet, underway since the Federal Reserve began raising rates in 2022, has further to run. The government did not choose a higher rate. The math of maturing debt chose it.
Why the average rate keeps climbing
The blended rate rises through a process of replacement, not repricing of existing bonds. A 10-year note the Treasury sold in 2016 might carry a coupon near 1.6%. When it matures, the government must borrow again to pay it off, and today that same maturity yields around 4.6%. Every rollover of this kind lifts the average. Roughly a fifth of all marketable Treasury debt matures within a year, so the turnover is fast. Short bills that once rolled at less than 0.5% now roll near 3.9%, and the belly of the curve has moved even more. The result is a mechanical, month-by-month grind higher in the average rate, largely independent of what the Fed does at its next meeting.
Market yields tell the same story. As of July 20, the 10-year Treasury yielded 4.60%, the 20-year 5.12%, and the 30-year 5.11%, according to Federal Reserve data. The two-year sat at 4.21% and the three-month bill near 3.86%. Those levels sit well above the coupons on the debt now maturing, so the refinancing gap persists at every point on the curve. The gap between the 10-year and two-year yields held at about 0.37 percentage points on July 21, a modestly positive slope that keeps long-term borrowing costly for the Treasury even as short rates hold steady. Until yields fall meaningfully or old low-coupon debt runs out, the average keeps drifting up.
A heavy supply week meets the Fed blackout
The refinancing runs straight through this week’s auction calendar. On July 22 at 1:00 p.m. Eastern, the Treasury reopens the 20-year bond with a $13 billion sale, adding to a security first issued in May. On July 23 it auctions a new $21 billion 10-year note. Those two sales alone raise $34 billion in longer-dated money, on top of the bills the Treasury rolls every week. Demand at recent sales has held up. The June reopening of the same 20-year bond cleared at 4.927%, and this week’s shorter bill auctions drew solid bidding, with the 13-week bill covered three times over. Investors are showing up, but they are demanding yields that keep pushing the government’s blended cost higher.
The auctions land during the Federal Reserve’s communications blackout, which began July 18 ahead of the July 28 and 29 policy meeting. With officials silent, the auctions offer one of the few real-time reads on how bond investors view the rate path. Markets widely expect the Fed to hold its target range at 3.50% to 3.75% next week, a decision that would leave the prime rate at 6.75% and the effective federal funds rate near 3.63%. This meeting produces no updated economic projections or dot plot, so the tone of the statement and the Chair’s press conference will carry the message. Strong auctions this week would signal confidence that rates have peaked; weak ones would suggest investors want more compensation to fund a growing debt.
What it means for your rates
A rising cost of government borrowing does not hit your wallet directly, but it shapes the backdrop for nearly every rate you pay. Treasury yields set the floor for mortgage rates, auto loans, and business credit, because lenders price their loans as a spread over comparable government debt. When the 10-year note holds above 4.5%, 30-year mortgages tend to stay in the high-6% range, and personal loan and credit card pricing stays elevated as well. The Fed’s short-term rate still anchors the current prime rate, which in turn drives variable products like credit cards and home equity lines. You can track how those consumer costs move on our consumer credit rates page.
The budget effect is larger and slower. Interest is now among the biggest lines in federal spending, and by several measures it has passed annual defense spending, trailing only Social Security among individual programs. Every dollar spent on interest is a dollar unavailable for other priorities or one that adds to future borrowing, which is the feedback loop that makes a rising average rate worth watching. Our interest on the national debt tracker shows the daily accrual, and the current national debt counter shows the balance those payments are servicing.
Frequently asked questions
What is the average interest rate on U.S. government debt?
The average interest rate on all interest-bearing Treasury debt reached 3.41% in June 2026, according to Treasury Department data. That is up from 3.35% in May and marks the highest average since 2009, as older low-coupon bonds mature and refinance at today’s higher yields.
Why is the average rate on the debt rising?
The average climbs through refinancing, not through repricing of bonds already outstanding. When a low-coupon security sold years ago matures, the Treasury borrows again at current yields near 4% to 5% to pay it off. Because about a fifth of marketable debt matures within a year, that turnover is quick, and each rollover of cheap old debt into more expensive new debt lifts the blended rate. The trend continues as long as market yields stay above the coupons on maturing securities.
How much is the U.S. spending on interest?
Gross interest on the public debt exceeded $1.05 trillion in the first nine months of fiscal 2026, which runs from October 2025 through June 2026, based on Treasury figures. That pace keeps interest among the largest categories in the federal budget. By several official measures, annual interest has moved above national defense spending and now trails only Social Security among individual programs, a shift driven by both the size of the debt and the higher average rate the government pays on it.
Does a higher rate on the debt affect my loans?
Not directly, but it reflects the same yield environment that prices your borrowing. Mortgages, auto loans, and business credit are set as a spread over Treasury yields, so when government borrowing costs stay high, consumer rates tend to as well. The Fed’s short-term rate anchors the prime rate at 6.75%, which drives variable products like credit cards and home equity lines. A persistently high average on the debt is a signal that elevated rates may last, which argues for treating today’s borrowing costs as the norm rather than a spike about to fade.
How does this connect to the Fed’s July meeting?
The Federal Reserve meets July 28 and 29, with a decision due July 29 at 2:00 p.m. Eastern. Markets widely expect officials to hold the target range at 3.50% to 3.75%. A hold would leave short-term rates, and the prime rate, unchanged. It would not stop the average rate on the debt from rising, because that figure is driven by maturing bonds repricing to market yields rather than by a single Fed move. Even a steady Fed leaves the refinancing math intact, so the blended cost can keep climbing between meetings.
Will interest costs keep climbing through 2026?
Most projections point that way. The Congressional Budget Office expects interest to remain one of the fastest-growing parts of the budget as the debt grows and low-coupon securities continue to roll over at higher rates. The average rate would stop rising only if market yields fell far enough that new debt priced below the maturing coupons, which is not the current setup. With the 10-year near 4.6% and the debt near $39.6 trillion, the direction of travel for total interest is up unless yields decline sharply and stay lower.
Watching the cost curve
The June reading confirms a slow, compounding story rather than a sudden shock. As long as maturing debt reprices to yields above its old coupons, the average keeps drifting higher, and this week’s $34 billion in bond and note sales adds fresh supply at those levels. Watch next week’s Fed decision on July 29 and the auction results that bracket it. For the numbers as they update, follow our interest on the national debt tracker, the current national debt counter, and our Fed rate forecast for where policy may head next.
References
- U.S. Department of the Treasury, Fiscal Data, Average Interest Rates on U.S. Treasury Securities.
- U.S. Department of the Treasury, Fiscal Data, Interest Expense on the Public Debt Outstanding.
- U.S. Department of the Treasury, Fiscal Data, Debt to the Penny.
- TreasuryDirect, Upcoming Auctions.
- Board of Governors of the Federal Reserve System, Selected Interest Rates (H.15).
- Board of Governors of the Federal Reserve System, FOMC Meeting Calendars.
- Federal Reserve Bank of St. Louis, FRED, 20-Year Treasury Constant Maturity Rate (DGS20).
Keep Reading
- Interest on the National Debt: Daily Cost Tracker
- Average Interest Rate on the National Debt Climbs to 3.35% in May
- Federal Interest Costs Top Defense Spending by $92 Billion
- U.S. Debt: The Complete Picture
- Current National Debt Counter
- Treasury 20-Year Bond Auction Clears 4.927%
- Treasury 30-Year Bond Auction Stops at 5.058%
- U.S. Debt-to-GDP Ratio
- Who Owns the U.S. National Debt
