YA 2025 Corporate Income Tax: Every Singapore Company Must File by 30 November

All Singapore incorporated companies, including dormant entities and loss-making businesses, must file their Year of Assessment 2025 Corporate Income Tax (CIT) returns by 30 November 2025.

1. File by 30 November 2025 — every company must submit a CIT return unless a waiver has been granted. Companies incorporated in 2023 file if they closed accounts in 2024; those incorporated in 2024 file if they commenced business, received income, and closed accounts in 2024.
2. Penalties for late filing reach $5,000 — IRAS fines up to $5,000 for late filing, adds $100 daily penalties for continued non-compliance, and courts may impose twice the assessed tax for companies that fail to file for two years or more. Close to 4,500 companies have been prosecuted since January 2025, yielding $3.4 million in penalties.

Small companies with revenue of $5 million or below may use the simplified Form C-S, cutting preparation time significantly.

Tip: IRAS recommends completing filing preparations by October and submitting by mid-November — directors are personally responsible for timely and accurate filing.

Source: https://www.iras.gov.sg/news-events/newsroom/corporate-income-tax-season--more-than-90--on-time-filing-rate-achieved-for-first-time-in-ya-2024