Receiving an IRAS tax audit notice in Singapore can be stressful, but being selected for an audit does not automatically mean your company has made a tax mistake. The Inland Revenue Authority of Singapore (IRAS) conducts audits to check whether businesses have correctly reported their income, expenses, GST and other tax information.<\/span><\/p>\n A well-organised response can make the process easier. Businesses should understand what IRAS may request, gather supporting documents early, respond accurately and address any discrepancies promptly.<\/span><\/p>\n This guide explains how to prepare for an IRAS tax audit in Singapore in 2026, what documents may be required, common areas reviewed by IRAS, and when professional tax audit assistance may be useful.<\/span><\/p>\n\n An IRAS tax audit is a review of a business’s financial and tax records to determine whether its tax returns comply with Singapore’s tax legislation.<\/span><\/p>\n Depending on the circumstances, IRAS may conduct the review through correspondence, telephone discussions, interviews or a visit to the business premises. The scope of an audit depends on the case and the information IRAS requires.<\/span><\/p>\n IRAS states that being selected for an audit does not necessarily mean that a taxpayer has made an error. Audits are conducted as part of its compliance and risk-based approach.\u00a0<\/span><\/p>\n An audit may examine areas such as:<\/span><\/p>\n\n IRAS uses compliance and risk-based approaches when selecting businesses for review. An audit may be carried out to verify information submitted in tax returns, examine specific transactions or assess whether the business is meeting its tax obligations.<\/span><\/p>\n Importantly, an audit selection should not be interpreted as proof that a company has deliberately done something wrong.<\/span><\/p>\n For GST audits, IRAS may review whether taxable supplies have been correctly reported, GST has been properly accounted for and input tax claims are supported by the required documentation.\u00a0<\/span><\/p>\n\n If your company receives an IRAS audit notification, avoid ignoring it or delaying your response.<\/span><\/p>\n Start by reviewing the notification carefully. Pay attention to:<\/span><\/p>\n\n IRAS may request information through written correspondence, telephone interviews or meetings. For certain audits, officers may also visit the company’s premises and examine accounting records.\u00a0<\/span><\/p>\n A practical first-response checklist<\/span><\/p>\n Once an audit notice arrives:<\/span><\/p>\n Step 1: Read the request carefully<\/strong><\/p>\n Identify exactly what IRAS has asked for instead of immediately sending large volumes of unrelated documents.<\/span><\/p>\n Step 2: Check the response deadline<\/strong><\/p>\n Make sure someone in the company is responsible for monitoring the deadline and coordinating the response.<\/span><\/p>\n Step 3: Inform your accountant or tax adviser<\/strong><\/p>\n If your business already works with an accounting or tax professional, involve them early.<\/span><\/p>\n Step 4: Secure the relevant records<\/strong><\/p>\n Collect the accounting, banking, invoicing, payroll and tax information relevant to the audit period.<\/span><\/p>\n Step 5: Reconcile the information<\/strong><\/p>\n Check whether the accounting records agree with the submitted tax returns before responding.<\/span><\/p>\n Step 6: Identify potential discrepancies<\/strong><\/p>\n If an error is discovered, discuss the appropriate disclosure or correction process with a qualified tax professional.<\/span><\/p>\n\n The documents required will depend on the scope of the audit. IRAS explains that auditors may examine source documents, accounting records, financial information, bank statements and other transaction-related records.\u00a0<\/span><\/p>\n For a corporate income tax review, a company may need to organise:<\/span><\/p>\n\n Prepare documents such as:<\/span><\/p>\n\n These may include:<\/span><\/p>\n\n The objective is to demonstrate how reported revenue was calculated and recorded.<\/span><\/p>\n\n Keep supporting evidence for significant expenses, including:<\/span><\/p>\n\n An expense appearing in the accounting system does not by itself establish that it qualifies for tax deduction. Appropriate supporting records are important.<\/span><\/p>\n\n If the business claims capital allowances, organise the relevant:<\/span><\/p>\n\n Depending on the audit scope, IRAS may examine employee or director remuneration and related records.<\/span><\/p>\n Keep relevant payroll reports, remuneration schedules and supporting filings properly organised.<\/span><\/p>\n\n Bank statements and reconciliations can help establish the connection between accounting entries and actual transactions.<\/span><\/p>\n IRAS notes that bank statements may form part of the records examined during an audit.\u00a0<\/span><\/p>\n\n GST-registered companies should pay particular attention to the accuracy and completeness of their GST records.<\/span><\/p>\n IRAS may examine whether:<\/span><\/p>\n\n IRAS states that GST audits are conducted using a risk-based approach and that businesses selected for review are not necessarily assumed to have made GST errors.\u00a0<\/span><\/p>\n Before responding to a GST audit, consider reconciling:<\/span><\/p>\n Accounting records \u2192 GST reporting \u2192 invoices \u2192 payment records<\/span><\/p>\n Any unexplained differences should be investigated before the company provides its final response.<\/span><\/p>\n\n Every audit is different, but businesses should pay attention to transactions where the accounting treatment and tax treatment may differ.<\/span><\/p>\n Examples include:<\/span><\/p>\n Entertainment expenses<\/strong><\/p>\n Make sure there is sufficient documentation showing the nature and business purpose of the expenditure.<\/span><\/p>\n Motor vehicle expenses<\/strong><\/p>\n Check whether the claimed expenses are allowable under the applicable tax rules and whether private and business use have been properly distinguished.<\/span><\/p>\n Personal expenses paid by the company<\/strong><\/p>\n Transactions that are personal in nature should not simply be treated as business expenses because they were paid using a corporate bank account.<\/span><\/p>\n Related-party transactions<\/strong><\/p>\n Companies should maintain appropriate documentation for transactions involving related entities and consider applicable transfer pricing requirements.<\/span><\/p>\n Revenue completeness<\/strong><\/p>\n Businesses should be able to reconcile reported revenue with accounting records and other relevant transaction information.<\/span><\/p>\n GST treatment<\/strong><\/p>\n Incorrect GST classification, unsupported input tax claims or incomplete reporting can create additional tax exposure.<\/span><\/p>\n These areas should be reviewed based on the facts of the individual business rather than assuming that every transaction will receive the same tax treatment.<\/span><\/p>\n\n Communication is an important part of the audit process.<\/span><\/p>\n IRAS expects businesses to provide timely, complete and accurate responses and to cooperate with requests for information.\u00a0<\/span><\/p>\n Do:<\/strong><\/p>\n\nWhat Is an IRAS Tax Audit?<\/b><\/h4>\n
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Why Does IRAS Audit a Business?<\/b><\/h4>\n
What Happens After Receiving an IRAS Audit Letter?<\/b><\/h4>\n
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Documents to Prepare for an IRAS Tax Audit<\/b><\/h4>\n
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GST Audit: What Should Singapore Businesses Check?<\/b><\/h4>\n
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Common Areas That May Require Closer Review<\/b><\/h4>\n
What Should You Do During an IRAS Audit?<\/b><\/h4>\n
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