The Institute of Certified Public Accountants of Singapore (ICPAS) is the national organisation of the accountancy profession in Singapore. It was established in June 1963 as the Singapore Society of Accountants (SSA) under the Singapore Society of Accountants Ordinance, then reconstituted and renamed the ICPAS on 11 February 1989, under the Accountants Act 1987. As of 1 April 2004, ICPAS is reconstituted as a society under the Societies Act.

The mission of the ICPAS is "to develop, support and enhance the integrity, status and interests of the accountancy profession in Singapore". The ICPAS seeks to achieve its mission by maintaining high standards of technical competence among its members; upholding the integrity and independence of the accountancy profession; enhancing the professional image and voice of the accountancy fraternity; contributing meaningfully to society through an active involvement in community service; and maintaining high standards of professionalism and productivity within the Institute's organisation and management to better serve the needs of its members.

Besides administering the Institute's membership, the ICPAS caters for the training and professional development of its members through regular courses conducted by its training arm, the Singapore Accountancy Academy (SAA). Courses offered by the Academy include internationally recognised accounting courses under its Joint Scheme of Examination agreements with The Association of Chartered Certified Accountants (ACCA) leading to the professional ACCA qualification, and the ACCA Certified Accounting Technician qualification.

The ICPAS' network of members spans the globe and its international outlook and connections are reflected in its membership of regional and international professional organisations like the ASEAN Federation of Accountants (AFA), the Asia-Oceania Tax Consultants Association (AOTCA) and the International Federation of Accountants (IFAC).

The ICPAS is headed by the Council, which sets the direction for the Institute's development and oversees its operations as a whole. The Secretariat is accountable to the Council and is responsible for the general administration of the Institute.

The Secretariat comprises five divisions Directorate, Finance and Administration, Membership Services, Technical and Singapore Accountancy Academy.