The Inland Revenue Authority of Singapore (IRAS) updated its Business Expenses guidance page on 29 September 2026 with the addition of a tool, the Business Expense Deductibility Checker. In general, deductible business expenses are those 'wholly and exclusively incurred in the production of income'. In other words, they must satisfy all the following conditions:
- The expenses are solely incurred in the production of income;
- The expenses must be incurred. It is considered incurred when the l…