Sri Lanka has EOI relations with 35 countries through 35 treaties.
| Treaty Type | |
| Sum | 35 |
| DTC | 35 |
| Jurisdiction | Type | Treaty | Signed | Entered into force | Exchange of Information | |
|---|---|---|---|---|---|---|
| Australia | DTC | DTC AU LK | Dec. 18, 1989 | Oct. 21, 1991 | Uncertain | |
| Bahrain | DTC | DTC BH LK | July 24, 2011 | July 11, 2014 | Uncertain | |
| Belgium | DTC | DTC BE LK | Feb. 3, 1983 | June 12, 1985 | Uncertain | |
| Canada | DTC | DTC CA LK | June 29, 1982 | June 9, 1986 | Uncertain | |
| China | DTC | DTC CN LK | Aug. 11, 2003 | May 22, 2005 | Uncertain | |
| Czech Republic | DTC | DTC CZ LK | June 26, 1978 | June 19, 1979 | Uncertain | |
| Denmark | DTC | DTC DK LK | Dec. 22, 1981 | Feb. 23, 1983 | Uncertain | |
| Finland | DTC | DTC FI LK | May 18, 1982 | March 28, 1984 | Uncertain | |
| France | DTC | DTC FR LK | Sept. 17, 1981 | Nov. 18, 1982 | Uncertain | |
| Germany | DTC | DTC DE LK | Sept. 13, 1979 | Feb. 20, 1982 | Uncertain | |
| India | DTC | DTC IN LK | Jan. 22, 2013 | Oct. 22, 2013 | Uncertain | |
| Indonesia | DTC | DTC ID LK | Feb. 3, 1993 | June 21, 1994 | Uncertain | |
| Italy | DTC | DTC IT LK | March 28, 1984 | May 9, 1991 | Uncertain | |
| Japan | DTC | DTC JP LK | Dec. 12, 1967 | Sept. 22, 1968 | Uncertain | |
| Kuwait | DTC | DTC KW LK | Feb. 5, 2002 | Feb. 23, 2004 | Uncertain | |
| Luxembourg | DTC | DTC LK LU | Jan. 30, 2013 | April 11, 2014 | Uncertain | |
| Malaysia | DTC | DTC LK MY | Sept. 16, 1997 | Aug. 13, 1998 | Uncertain | |
| Mauritius | DTC | DTC LK MU | March 12, 1996 | May 2, 1997 | Uncertain | |
| Netherlands | DTC | DTC LK NL | Nov. 17, 1982 | Jan. 24, 1984 | Uncertain | |
| Norway | DTC | DTC LK NO | Dec. 4, 1986 | March 8, 1988 | Uncertain | |
| Pakistan | DTC | DTC LK PK | Oct. 5, 1981 | June 18, 1983 | Uncertain | |
| Philippines | DTC | DTC LK PH | Dec. 11, 2000 | No | Uncertain | |
| Poland | DTC | DTC LK PL | April 25, 1980 | Jan. 1, 1983 | Uncertain | |
| Qatar | DTC | DTC LK QA | Nov. 7, 2004 | April 2, 2007 | Uncertain | |
| Romania | DTC | DTC LK RO | Oct. 19, 1984 | Feb. 28, 1986 | Uncertain | |
| Russia | DTC | DTC LK RU | March 2, 1999 | Jan. 1, 2003 | Uncertain | |
| Seychelles | DTC | DTC LK SC | Nov. 7, 2011 | No | Uncertain | |
| Singapore | DTC | DTC LK SG | April 4, 2014 | No | Uncertain | |
| Slovakia | DTC | DTC LK SK | July 26, 1978 | June 19, 1979 | Uncertain | |
| South Korea | DTC | DTC KR LK | May 28, 1984 | June 20, 1986 | Uncertain | |
| Sweden | DTC | DTC LK SE | Feb. 23, 1983 | July 30, 1984 | Uncertain | |
| Switzerland | DTC | DTC CH LK | Jan. 11, 1983 | Sept. 14, 1984 | Uncertain | |
| United Arab Emirates | DTC | DTC AE LK | July 7, 1992 | May 4, 2004 | Uncertain | |
| United Kingdom | DTC | DTC GB LK | June 21, 1979 | May 21, 1980 | Uncertain | |
| United States of America | DTC | DTC LK US | March 14, 1985 | July 12, 2004 | Uncertain |