| Date | Country | Description | Source |
|---|---|---|---|
| 2023-06-22 | Chile | 2010 Treaty --- approved by the Senate | Senate.gov |
| 2022-12-07 | Croatia | New treaty signed (but not yet ratified) | Treasury.gov |
| 2022-07-22 | Hungary | Notification of termination of 1979 treaty | Treasury.gov |
| 2019-11-27 | Spain | 2013 Protocol to the 1993 treaty --- entered into force | State.gov |
| 2019-09-20 | Switzerland | 2009 Protocol to the 1996 treaty --- entered into force | State.gov |
| 2019-09-09 | Luxembourg | 2009 Protocol to the 1996 treaty --- entered into force | State.gov |
| 2019-08-30 | Japan | 2013 Protocol to the 2003 treaty --- entered into force | State.gov |
| 2019-07-17 | Japan | 2013 Protocol to the 2003 treaty --- approved by the Senate | Senate.gov |
| 2019-07-17 | Luxembourg | 2009 Protocol to the 1996 treaty --- approved by the Senate | Senate.gov |
| 2019-07-17 | Switzerland | 2009 Protocol to the 1996 treaty --- approved by the Senate | Senate.gov |
| 2019-07-16 | Spain | 2013 Protocol to the 1990 treaty --- approved by the Senate | Senate.gov |
| 2016-02-17 | U.S. | 2016 U.S. Model Treaty published (PDF) | Treasury.gov |
| 2015-10-29 | Japan | 2013 Protocol to the 2003 treaty --- Technical Explanation | Treasury.gov |
| 2015-10-28 | Japan | Explanation Of Proposed Protocol Amending the Income Tax Treaty Between the United States and Japan | JCT.gov |
| 2014-06-19 | Spain | 2013 Protocol to the 1990 treaty --- Technical Explanation | Treasury.gov |
| 2014-06-17 | Spain | Explanation Of Proposed Income Tax Treaty Between The United States And Spain | JCT.gov |
| 2014-06-17 | Poland | Explanation Of Proposed Income Tax Treaty Between The United States And Poland | JCT.gov |
| 2014-02-24 | Chile | Explanation Of Proposed Income Tax Treaty Between The United States And Chile | JCT.gov |
| 2014-02-21 | U.S. | Explanation of Proposed Protocol Amending the Multilateral Conventional on Mutual Administrative Assistance in Tax Matters | JCT.gov |
| 2013-02-13 | Poland | 2013 Proposed Treaty | Treasury.gov |
| 2013-02-13 | Poland | 2013 Proposed Treaty --- Technical Explanation | Treasury.gov |
| 2011-06-07 | Luxembourg | 2009 Protocol to the 1996 treaty --- Technical Explanation | Treasury.gov |
| 2011-05-20 | Hungary | Explanation Of Proposed Income Tax Treaty Between The United States And Hungary | JCT.gov |
| 2011-05-20 | Luxembourg | Explanation Of Proposed Protocol to the Income Tax Treaty Between The United States And Luxembourg | JCT.gov |
| 2011-05-20 | Switzerland | Explanation Of Proposed Protocol to the Income Tax Treaty Between The United States And Switzerland | JCT.gov |
| 2010-02-04 | Chile | 2010 Proposed Treaty | Treasury.gov |
| 2010-02-04 | Chile | 2010 Proposed Treaty --- Technical Explanation | Treasury.gov |
| 2010-02-04 | Hungary | 2010 Proposed Treaty | Treasury.gov |
| 2009-09-23 | Switzerland | 2009 Protocol to the 1996 treaty --- Technical Explanation | Treasury.gov |