Why Do Singapore Startup Compliance Deadlines Matter in 2026?
Because missing even one triggers ACRA penalties of up to S$600 and IRAS fines of up to S$5,000.
S$600 in ACRA late-filing penalties and IRAS fines of up to S$5,000 await founders who miss a single statutory date. In this guide, we discuss the seven Singapore startup compliance deadlines in 2026 that every startup must calendar, starting from private limited company setup in Singapore.
When Is the ECI Filing Deadline for Singapore Startups?
3 months after FYE — 31 March for a 31 December year end — unless the nil-ECI exemption applies.
3 months after your financial year end is the deadline for filing Estimated Chargeable Income (ECI) with IRAS. The obligation sits under section 63 of the Income Tax Act. A 31 December year end means filing by 31 March. Companies with annual revenue of S$5 million or below and nil ECI are exempt. ECI also triggers the first instalment payments under the GIRO scheme, so accurate figures matter from the outset.
When Is the Annual General Meeting Deadline for Private Companies?
6 months after FYE — 30 June for a 31 December year end.
6 months after financial year end is the AGM deadline for private companies under section 175 of the Companies Act. Companies with a 31 December year end must hold the meeting by 30 June. Directors present financial statements for members' consideration. A private company may dispense with the AGM under section 175A by resolution, subject to eligibility conditions. An experienced corporate secretary typically maintains this timetable.
When Is the Annual Return Lodgment Due with ACRA?
7 months after FYE — 31 July for a 31 December year end — with S$300 to S$600 late penalties.
7 months after financial year end is the ACRA Annual Return deadline under section 197 of the Companies Act. For a 31 December year end, the return, including XBRL financial statements, is due by 31 July via BizFile+. Late filing attracts S$300 if within three months of the due date and S$600 thereafter. A structured paperless compliance system helps startups track this milestone reliably.
When Are AIS Employee Income Records Due to IRAS?
Enrolled employers must submit employees' income records electronically by 1 March 2026, replacing manual IR8A forms.
1 March 2026 is the filing deadline for employee income records under the Auto-Inclusion Scheme (AIS) with IRAS. The requirement sits under section 68(2) of the Income Tax Act. AIS replaces manual IR8A preparation for enrolled employers, with earnings submitted electronically and automatically included in employees' personal tax returns. Startups hiring their first employees during 2025 should confirm enrolment early to avoid a year-end rush.
Singapore Startup Compliance Deadlines 2026 at a Glance
| Filing | Deadline | Key Figure |
|---|---|---|
| ECI (IRAS) | 3 months after FYE (31 March for a 31 December year end) | Exempt if revenue is S$5 million or below with nil ECI |
| AGM (ACRA) | 6 months after FYE (30 June for a 31 December year end) | Dispensable under section 175A by resolution |
| Annual Return (ACRA) | 7 months after FYE (31 July via BizFile+) | S$300 to S$600 late-filing penalty |
| AIS employee records (IRAS) | 1 March 2026 | Replaces manual IR8A preparation |
| GST F5 (IRAS) | 1 month after each quarter ends (31 January for October to December) | Registration mandatory above S$1 million taxable turnover |
| Corporate Tax Return (IRAS) | 30 November 2026 (YA 2026) | Up to S$5,000 penalty; 17% corporate tax rate |
| RORC update (ACRA) | 30 days after becoming aware of a controller change | Supports the annual return submission |
When Are Quarterly GST Returns Due in Singapore?
File and pay the F5 return 1 month after each quarter ends — 31 January for the October to December quarter.
1 month after each quarterly accounting period ends is the GST F5 filing and payment deadline with IRAS. For the October to December quarter, this means 31 January of the following year. GST registration becomes mandatory once taxable turnover exceeds S$1 million on a rolling 12-month basis. Startups must monitor turnover closely before the obligation crystallises.
When Is the YA 2026 Corporate Tax Return Deadline?
Every company, including loss-making ones, must e-file Form C-S or C by 30 November 2026.
30 November 2026 is the e-filing deadline for all YA 2026 Corporate Income Tax Returns through myTax Portal. The date applies regardless of financial year end, making it the fixed anchor among Singapore startup compliance deadlines in 2026. Companies in a loss position must still file. Form C-S suits companies incorporated in Singapore with revenue of S$5 million or below. Income is taxed at the prevailing 17% corporate rate. Late filing or non-filing may result in penalties of up to S$5,000.
When Must a Singapore Startup Update Its RORC?
Update the registers within 30 days of becoming aware of a controller change, then lodge with ACRA.
Thirty days after becoming aware of a controller change is the window for updating your Register of Registrable Controllers (RORC). Nominee director registers follow the same 30-day rule, before lodgment with ACRA. Accurate registers must also support your annual return submission. Founders should align RORC upkeep with broader post-incorporation services so every statutory register remains current as shareholding and control evolve.
Struggling to Track Every Deadline?
Let our corporate services team manage your ACRA and IRAS filings end to end, so no statutory date slips past your startup.
Frequently Asked Questions
ACRA imposes a S$300 penalty if the Annual Return is filed within three months after the due date, and S$600 if filed more than three months late, under section 197(8) of the Companies Act.
Yes. Companies that carried on business or received income during financial year 2025 must file the YA 2026 return by 30 November 2026, even if they were in a loss position.
ECI is due within three months of the financial year end. Companies with annual revenue of S$5 million or below and nil estimated chargeable income are exempt from ECI filing.
Employers enrolled in the Auto-Inclusion Scheme must submit their employees' income records to IRAS electronically by 1 March 2026, replacing manual IR8A forms.
Private companies must hold an AGM within six months of the financial year end under section 175 of the Companies Act, unless the AGM is dispensed with under section 175A.
Abigail Yu
Author
Abigail Yu oversees executive leadership at 3E Accounting Group, leading operations, IT solutions, public relations, and digital marketing to drive business success. She holds an honors degree in Communication and New Media from the National University of Singapore and is highly skilled in crisis management, financial communication, and corporate communications.
