International Tax 2026

SINGAPORE Law and Practice Contributed by: Lee Woon Shiu and Cheung Kuan Swan (Catherine), DBS Private Bank

Notification of Chargeable Income (NCI) Companies are required to file an Estimated Charge - able Income (ECI) and notify IRAS of their chargeabil - ity, subject to certain statutory exemptions. Withholding Tax Reporting Entities making payments to non-residents that are subject to withholding tax must withhold the relevant amounts and declare and remit them to IRAS within the prescribed timelines. Voluntary Disclosure Programme IRAS encourages taxpayers to voluntarily disclose past errors or omissions in their tax filings. Where dis - closures are timely and complete, reduced penalties may be granted. Disclosure of Tax Avoidance Schemes Although Singapore does not operate a formal man - datory disclosure regime comparable to the European Union’s DAC6, IRAS is empowered under Section 33 of the Income Tax Act to request information on arrangements suspected of having a tax avoidance purpose. Taxpayers are generally required to provide complete and accurate disclosures in their tax filings. Singapore’s robust tax reporting framework reflects its commitment to international tax compliance and recognised regulatory standards. 5.5 Role of Tax Authorities and Enforcement Measures The Inland Revenue Authority of Singapore, IRAS, serves as the principal tax authority and is vested with extensive powers to investigate tax fraud and enforce compliance with tax laws. Access to Records IRAS is authorised to request and examine all relevant books, accounts, statements, electronic records, and other documents that are necessary for tax assess - ment or investigative purposes. Tax Audits The Authority conducts desk audits, field audits, and in depth investigations. During an audit, officers may review records, interview relevant personnel, and request additional information where necessary.

Unannounced Visits Although routine tax investigations rarely involve for - mal raids, IRAS may carry out unannounced visits or inspections of premises where there are reasonable grounds to believe that relevant documents or infor - mation are located. Such visits must be supported by proper authorisation. Search Warrants In cases involving suspected serious tax fraud or eva - sion, IRAS may apply to the courts for search war - rants. These warrants allow officers to enter premises, conduct searches, and seize documents or assets as part of the investigation. Power to Obtain Information The IRAS has the authority to compel individuals or third parties, including financial institutions, to provide information or documentation that is relevant to an investigation. Information Sharing Through Singapore’s extensive network of double taxation agreements and international conventions, including the Multilateral Convention on Mutual Administrative Assistance in Tax Matters, the IRAS may exchange information with foreign tax authorities. Power to Intercept and Detain For serious tax offences, IRAS may involve law enforcement agencies. Subject to judicial oversight, such agencies may intercept communications or detain individuals in connection with an investigation. Penalties and Prosecution IRAS may impose administrative penalties for non- compliance, such as late submission of returns or the filing of inaccurate information. Where there is signifi - cant tax fraud or evasion, cases may be referred for criminal prosecution. Power to Assess and Reassess Based on information obtained during investigations, the IRAS retains the power to raise tax assessments and reassessments, even where a tax return has already been submitted.

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