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How much US Treasury debt was due within a year on 31 August 2018?

On , $4.31 trillion of marketable US Treasury debt was due within 12 months, 20.3% more than a year earlier ($3.58 trillion on ), the largest amount of any month-end we hold.

September 2018 is the largest month, with $783.47 billion

Marketable Treasury debt maturing each month, $ trillion

  • Bills
  • Notes and bonds
  • TIPS and floating rate notes
September 2018 is the largest month, with $783.47 billion0.000.250.500.751.00Sep0.78Oct0.54Nov0.67Dec0.31Jan0.44Feb0.39Mar0.14Apr0.24May0.21Jun0.14Jul0.20Aug0.23September 2018 is the largest month, with $783.47 billion0.000.250.500.751.00SepNovJanMarMayJul

Source: U.S. Treasury, Fiscal Data, Monthly Statement of the Public Debt. Observed .

Each month as a table
Marketable Treasury debt maturing each month ($ million)
Maturing inTotalBillsNotesBondsTIPSFRNsSecurities
September 2018783,469666,982116,4870007
October 2018544,552385,971116,6730041,9079
November 2018667,728485,007175,5477,1740011
December 2018306,384188,001118,3830008
January 2019435,979258,961116,194017,29943,52511
February 2019393,761202,002178,66813,0900010
March 2019141,83623,999117,8370005
April 2019242,89026,001118,496053,76744,6276
May 2019212,98226,003186,9790006
June 2019143,45626,000117,4560005
July 2019204,64525,997118,211017,91142,5267
August 2019228,96625,999184,02718,941007
All of these months4,306,6482,340,9231,664,95839,20688,977172,58592

The table scrolls sideways; the first column stays in place.

What is all marketable debt made of?

KindAmount, $ millionShare
Bills2,340,92315.3%
Notes9,120,34359.6%
Bonds2,112,79013.8%
TIPS1,365,2308.9%
Floating rate notes352,1422.3%
All marketable debt15,291,428100.0%

Bills, the securities that mature within a year of issue, made up 15.3% of marketable debt at the month-end and 54.4% of what matures in the months above.

Weighted by amount, marketable debt had 69.2 months to go until it matures, on average, at the month-end.

How does it compare with a year earlier?

Debt due within the next months ($ million)
Month-endTotalBillsBills share
31 August 20184,306,6482,340,92354.4%
31 August 20173,580,5341,747,92248.8%

About these figures

The Federal Reserve's part and the source

How much of it did the Federal Reserve hold?

Maturing debt held in the Federal Reserve's System Open Market Account ($ million)
Maturing inTotalHeld by the FedFed share
September 2018783,46919,0072.4%
October 2018544,55223,8594.4%
November 2018667,72859,2948.9%
December 2018306,38418,2095.9%
January 2019435,97916,2753.7%
February 2019393,76156,05214.2%
March 2019141,83622,37915.8%
April 2019242,89031,92613.1%
May 2019212,98258,53227.5%
June 2019143,45621,46315.0%
July 2019204,64521,49410.5%
August 2019228,96669,48830.3%

Source: Federal Reserve Bank of New York, SOMA holdings. Observed .

Source

Source: U.S. Treasury, Fiscal Data, Monthly Statement of the Public Debt. Observed .

Sources and licence

Sources and licence

  • U.S. Treasury, Bureau of the Fiscal Service, Fiscal Data (source). Licence: Public domain, a work of the US federal government
  • © 2026 Federal Reserve Bank of New York. Content from the New York Fed subject to the Terms of Use at newyorkfed.org. The Federal Reserve share of maturities is computed by 500metrics. (source). Licence: Federal Reserve Bank of New York terms of use

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