Revenue collection agencies across the world aim to maximise revenue collection by minimising tax noncompliance. The different types of tax noncompliance are collectively referred to as the tax gap phenomenon, which revenue collection agencies address by means of various enforcement approaches and capabilities. Much like any organisation, the resources required to execute these capabilities are finite and require accurate organisational decision-making in order to make optimal use thereof. Information technology, and specifically decision support systems (DSS), is critical in enabling this decision-making process. Using the Structuration Model of Technology, the information needs, demand and offerings of revenue collection agencies are explored given their objective of narrowing the tax gap phenomenon using DSS. Emphasis is placed on the manner in which IT is used to address taxpayer noncompliance, the way in which IT supports knowledge creation and subsequently also facilitate the decision-making process of tax practitioners, and also the different types of IT offerings made available to decision-makers in the form of DSS. In doing so, this research presents the results of a case study on the South African Revenue Service in which a conceptual decision support system framework is developed aimed at minimising the tax gap phenomenon. The research is conducted as a qualitative single case study and presented through a narrative analysis. The framework is systematically constructed as the research findings emerge and concluded by means of a framework validation and transfer ability test. The research result is a conceptual DSS framework acting as a reference point to other revenue collection agencies with the objective of addressing taxpayer noncompliance through DSS. / Jurisprudence / D. Phil. (Information Systems)

Die bestaande belastingaansporingsmaatreels in Suid-Afrika is nagevors. Belastingaansporingsmaatreels wat vroeer in gebruik was, is ook ondersoek. Aandag is gegee aan die kontantaansporingsmaatreels wat vir vervaardigingsondernemings beskikbaar is in Suid-Afrika. Programme wat deur onder andere die Nywerheid-Ontwikkelingskorporasie van Suid-Afrika Beperk en die Kleinsake-Ontwikkelingskorporasie aangebied word is ondersoek. Ondersoek is ingestel na die bevindings van die Margo kommissie Verslag wat in 1986 uitgereik is. Die verslag van die Katz-kommissie wat in 1994 uitgereik is, is ook nagevors. Aandag is gegee aan die 1994, 1995 en 1996 begrotings asook sommige van die aspekte van die Algemene Ooreenkoms op Tariewe en Handel. Die belastingkoerse en aansporingsmaatreelsprogramme wat deur die Verenigde State van Amerika, Verenigde Koninkryk en Kanada beskikbaar gestel word aan ondernemings is ondersoek. Moontlike oplossings vir die probleme wat tans ondervind word in SuidAfrika se aansporingsmaatreelstelsel is geformuleer. / The existing tax incentives in South Africa were researched. Tax incentives that were previously in use, were also investigated. Attention was given to the cash incentives available to manufacturing enterprises in South Africa. Amongst others the programmes offered by the Industrial Development Corporation of South Africa Limited and the Small Business Development Corporation were investigated. The findings of the Margo Commission Report issued in 1986 were investigated. The Katz Report issued in 1994 was also researched. Attention was given to the 1994, 1995 and 1996 budgets as well as some of the aspects of the General Agreement on Tariffs and Trade. The taxation rates and incentive programmes available to enterprises in the United States of America, United Kingdom and Canada were investi gated. Possible solutions for the problems currently experienced in South Africa with regard to incentives have been formulated. / School of Computing / M.Sc (Computer Science)

Revenue collection agencies across the world aim to maximise revenue collection by minimising tax noncompliance. The different types of tax noncompliance are collectively referred to as the tax gap phenomenon, which revenue collection agencies address by means of various enforcement approaches and capabilities. Much like any organisation, the resources required to execute these capabilities are finite and require accurate organisational decision-making in order to make optimal use thereof. Information technology, and specifically decision support systems (DSS), is critical in enabling this decision-making process. Using the Structuration Model of Technology, the information needs, demand and offerings of revenue collection agencies are explored given their objective of narrowing the tax gap phenomenon using DSS. Emphasis is placed on the manner in which IT is used to address taxpayer noncompliance, the way in which IT supports knowledge creation and subsequently also facilitate the decision-making process of tax practitioners, and also the different types of IT offerings made available to decision-makers in the form of DSS. In doing so, this research presents the results of a case study on the South African Revenue Service in which a conceptual decision support system framework is developed aimed at minimising the tax gap phenomenon. The research is conducted as a qualitative single case study and presented through a narrative analysis. The framework is systematically constructed as the research findings emerge and concluded by means of a framework validation and transfer ability test. The research result is a conceptual DSS framework acting as a reference point to other revenue collection agencies with the objective of addressing taxpayer noncompliance through DSS. / Jurisprudence / D. Phil. (Information Systems)

Die bestaande belastingaansporingsmaatreels in Suid-Afrika is nagevors. Belastingaansporingsmaatreels wat vroeer in gebruik was, is ook ondersoek. Aandag is gegee aan die kontantaansporingsmaatreels wat vir vervaardigingsondernemings beskikbaar is in Suid-Afrika. Programme wat deur onder andere die Nywerheid-Ontwikkelingskorporasie van Suid-Afrika Beperk en die Kleinsake-Ontwikkelingskorporasie aangebied word is ondersoek. Ondersoek is ingestel na die bevindings van die Margo kommissie Verslag wat in 1986 uitgereik is. Die verslag van die Katz-kommissie wat in 1994 uitgereik is, is ook nagevors. Aandag is gegee aan die 1994, 1995 en 1996 begrotings asook sommige van die aspekte van die Algemene Ooreenkoms op Tariewe en Handel. Die belastingkoerse en aansporingsmaatreelsprogramme wat deur die Verenigde State van Amerika, Verenigde Koninkryk en Kanada beskikbaar gestel word aan ondernemings is ondersoek. Moontlike oplossings vir die probleme wat tans ondervind word in SuidAfrika se aansporingsmaatreelstelsel is geformuleer. / The existing tax incentives in South Africa were researched. Tax incentives that were previously in use, were also investigated. Attention was given to the cash incentives available to manufacturing enterprises in South Africa. Amongst others the programmes offered by the Industrial Development Corporation of South Africa Limited and the Small Business Development Corporation were investigated. The findings of the Margo Commission Report issued in 1986 were investigated. The Katz Report issued in 1994 was also researched. Attention was given to the 1994, 1995 and 1996 budgets as well as some of the aspects of the General Agreement on Tariffs and Trade. The taxation rates and incentive programmes available to enterprises in the United States of America, United Kingdom and Canada were investi gated. Possible solutions for the problems currently experienced in South Africa with regard to incentives have been formulated. / School of Computing / M.Sc (Computer Science)