TIS refer to service transactions between residents and non-residents. While traditionally confined to transportation and travel, activities such as financial, professional and other business services have also grown in importance with globalization, improved telecommunications network and service trade liberalization. 

TIS statistics are compiled using both survey and administrative data, following principles and guidelines set out by the IMF Balance of Payments Manual, fifth edition.
The major service categories compiled by DOS are:

Singapore’s services exports stood at $136.0 billion for the year, down 3.2% following the 9.6% growth in 2008. Total services imports contracted by 6.7% to $115.4 billion, reversing from an increase of 10.0% in the previous year. Transportation, trade-related, travel and business management services formed the bulk of cross-border transactions in services in 2009. Singapore’s top trading partners included the European Union (EU), the United States (US), the Association of Southeast Asian Nations (ASEAN), Japan, China and Australia.

You may download our "Singapore’s International Trade in Services" publication or access the occasional papers on this topic online.