Running a Singapore private limited company means juggling deadlines from two main regulators — the Accounting and Corporate Regulatory Authority (ACRA) and the Inland Revenue Authority of Singapore (IRAS) — plus obligations to the Central Provident Fund (CPF) Board, the Ministry of Manpower (MOM), and (where relevant) GST and grant reporting. Miss one and the consequences range from a S$300 late lodgement fee to summonses, director disqualification, and increased fines under the recent Corporate Service Providers Act 2024 amendments.
This guide is the compliance calendar we wish every Singapore company director kept on the wall. It covers every recurring filing and obligation — from the day your financial year ends to the day you pay the final corporate tax assessment — so you can build a realistic schedule, brief your corporate secretary, and avoid the very expensive habit of missing dates.
Most of these deadlines are anchored to your company’s Financial Year End (FYE), which you choose at incorporation. Once you know your FYE, you can map every key date in the year. We use a sample FYE of 31 December 2025 throughout this guide so you can substitute your own dates easily.
Why a Compliance Calendar Matters in 2026
From January 2026, ACRA has been enforcing exact statutory dates much more strictly. The informal grace periods many directors quietly relied on have been removed, late lodgement penalties have been simplified to a flat S$300 (with prosecution for repeat offenders), and the maximum fines for breaches of director duties — including filing failures — have risen to S$20,000 per offence following recent amendments to the Companies Act 1967.
The picture is the same on the tax side. IRAS has tightened ECI exemption rules, increased its use of estimated assessments where filings are missed, and is rolling out more granular enforcement under its updated voluntary disclosure framework. For business owners, the message is simple: a calendar plus a corporate secretary is no longer optional — it is the cheapest insurance you can buy.
If you are unsure whether your filings are up to date, our team at Raffles Corporate Services runs a free 15-minute compliance health check before any new client signs on. It usually surfaces one or two filings the previous service provider quietly let slide.
Quarter 1 (Months 1-3 After FYE): The ECI Window
Estimated Chargeable Income (ECI) — Within 3 Months of FYE
Under the Income Tax Act 1947 and IRAS administrative rules, every Singapore company must file an Estimated Chargeable Income (ECI) statement within three months after its financial year end. For a 31 December 2025 FYE, that means filing by 31 March 2026.
The ECI is your best estimate of taxable income for the Year of Assessment (YA), based on actual financial results — not a guess. Filing early triggers instalment options for paying the eventual tax: file within 1 month of FYE and IRAS allows up to 10 monthly instalments; file in month 2 and you get up to 8; file in month 3, up to 6.
An ECI waiver applies only if both conditions are met simultaneously: your annual revenue is S$5 million or below, AND your ECI is nil. Many small companies wrongly assume they are auto-exempted — they are not. For the full mechanics, see our dedicated ECI filing guide and the official IRAS ECI page.
Q1 Quick Wins
Q1 is also when most directors should be: (1) closing the books with their bookkeeper or accountant, (2) confirming the audit pathway (most small companies are exempt under the Small Company / Small Group criteria in the Thirteenth Schedule of the Companies Act), and (3) confirming dividends from the prior year if any. If you intend to declare an interim dividend before AGM, the prior year’s accounts must be ready.
Quarter 2 (Months 4-6 After FYE): The AGM Window
Annual General Meeting — Within 6 Months of FYE
Under Section 175(1) of the Companies Act 1967, a private company must hold its AGM within 6 months after its FYE. For a 31 December 2025 FYE, the latest AGM date is 30 June 2026. Listed companies must hold the AGM within 4 months after FYE.
Private companies can dispense with physical AGMs entirely if (a) financial statements are sent to all members within 5 months of the FYE, OR (b) all members pass a resolution to dispense with the AGM (which can be a perpetual resolution). The dispensation rules are set out in Sections 175A and 175B of the Companies Act. Notice for AGMs that proceed must still go out at least 14 days before the meeting (or 21 days if there are special resolutions). Our practical walk-through is in our AGM requirements guide.
Financial Statements Sent to Members
Under Section 203 of the Companies Act, financial statements must be circulated to members at least 14 days before the AGM. If you are using the dispensation route, they must reach members within 5 months of FYE.
Quarter 3 (Month 7 After FYE): The Annual Return
Annual Return — Within 7 Months of FYE
This is the headline filing of the year. Under Section 197 of the Companies Act 1967, every private company must file its Annual Return (AR) with ACRA within 7 months after FYE — for a 31 December 2025 FYE, the deadline is 31 July 2026. Listed companies must file within 5 months. Companies with branch registers outside Singapore get an extra month (8 months for non-listed; 6 for listed).
The AR confirms company particulars, share capital, officers, and AGM date, and attaches financial statements (in XBRL where required) for non-exempt private and public companies. Our step-by-step Bizfile+ guide walks through the actual screen flow. The official ACRA reference is the ACRA Filing Annual Returns page.
Late filing triggers a S$300 composition fee per breach, and ACRA can also pursue directors personally for repeat offences. Three consecutive late ARs is one of the recognised triggers for ACRA-initiated disqualification under Section 155 of the Companies Act.
Quarter 4 (By 30 November): The Corporate Tax Return
Form C-S, Form C-S (Lite) or Form C — by 30 November
Every Singapore company must file an annual corporate income tax return for the Year of Assessment that follows its financial year. Companies with revenue under S$5 million file Form C-S (or Form C-S (Lite) if revenue is under S$200,000). Larger or more complex companies file the full Form C.
The statutory paper deadline is 30 November of the YA. IRAS effectively mandates e-filing — and the e-filing deadline is 30 November as well (the 15 December extension that existed historically was discontinued; always confirm the current year’s date with IRAS). For a 31 December 2025 FYE, the YA is 2026 and the filing deadline is 30 November 2026. The IRAS Form C-S/C guidance page is the authoritative reference.
Tax assessment notices typically follow within a few months. Tax must be paid within 1 month of the Notice of Assessment — though approved instalment plans (set by ECI filing) often run beyond this. For 2026, remember to claim the 40% Corporate Income Tax (CIT) Rebate (capped at S$30,000) — see our Budget 2026 CIT rebate guide.
The Year-Round Layer: GST, CPF, Payroll, and Industry Filings
The annual layer above is only the spine. Three more rhythms run alongside it.
GST Returns — Quarterly
If your taxable turnover exceeded S$1 million in the past 12 months (or you reasonably expect it to exceed S$1 million in the next 12 months), GST registration is compulsory under the GST Act 1993. The current GST rate is 9% as of 1 January 2024. GST returns (Form GST F5) are filed quarterly within 1 month of the end of each accounting period.
Common GST quarter-ends are 31 March, 30 June, 30 September, and 31 December — meaning F5 filings fall due on 30 April, 31 July, 31 October, and 31 January respectively. Voluntary GST registration is also possible and often sensible for B2B businesses claiming input tax. The IRAS GST registration portal sits on iras.gov.sg.
CPF Contributions — Monthly
Every employer must pay CPF contributions for Singapore Citizen and PR employees by the 14th day of the following month (effectively the 14th — late interest accrues at 1.5% per month). Employee Self-Help Group (SHG) contributions, Skills Development Levy (SDL), and Foreign Worker Levy (where applicable) follow the same monthly cadence. Late CPF carries both interest and statutory penalty exposure under the CPF Act.
IR8A and IR21 — Annual
Employers must submit Form IR8A (employment income return) for each employee by 1 March each year. Form IR21 (tax clearance for foreign employees leaving Singapore) must be submitted at least one month before the employee’s departure or cessation date. For a fuller treatment of the employer obligation set, see our Singapore company compliance checklist.
The Sample Calendar (FYE 31 December 2025)
| Deadline | Filing | Statutory Reference |
|---|---|---|
| 14th of each month | CPF, SDL, SHG contributions | CPF Act |
| 31 January 2026 | GST F5 (Oct-Dec quarter) | GST Act 1993 |
| 1 March 2026 | IR8A submission to IRAS | Income Tax Act 1947 |
| 31 March 2026 | ECI for YA 2026 | Income Tax Act 1947 |
| 30 April 2026 | GST F5 (Jan-Mar quarter) | GST Act 1993 |
| 30 June 2026 | AGM (latest date) | S.175 Companies Act 1967 |
| 31 July 2026 | Annual Return to ACRA + Q2 GST F5 | S.197 Companies Act / GST Act |
| 31 October 2026 | GST F5 (Jul-Sep quarter) | GST Act 1993 |
| 30 November 2026 | Form C-S / C-S (Lite) / C for YA 2026 | Income Tax Act 1947 |
What ACRA and IRAS Will Do If You Miss a Date
For ACRA, the immediate cost is a S$300 late lodgement fee per missed AR or AGM. For prosecution, fines can reach S$5,000 per offence under Section 175 (failure to hold AGM) and similar amounts under Section 197 (late AR). The April 2026 amendments raised certain director duty breach fines to up to S$20,000. Three consecutive late ARs trigger automatic enforcement action against directors.
For IRAS, the standard ECI/Form C-S late filing penalty starts at S$200 and escalates; willful evasion attracts up to 400% penalty plus prosecution under the Income Tax Act. Late GST filing carries a S$200 penalty per F5, plus 5% on unpaid GST. Late CPF accrues interest from the first day of default.
None of this is theoretical. ACRA’s published enforcement statistics show several thousand prosecutions and disqualification orders each year, predominantly against directors who treated the calendar as a soft suggestion.
Practical Tips for Building Your Calendar
Pick a sensible FYE at incorporation. December and March are popular but spread the work to your accountant’s slowest months if you can — for many SMEs an FYE of 30 June or 30 September spreads the year more evenly. Calendar dates are anchored to FYE, so choosing wisely once saves friction every year.
Block out three core review meetings: an end-of-year close-out, a pre-AGM review, and a pre-tax-filing review. Each takes about 90 minutes with a competent corporate secretary and accountant and prevents 90% of the disasters we see.
Use BizFile+ alerts. ACRA’s portal sends statutory reminders to the registered email on file — but only if you keep that email current. Update the email any time you change service providers. The same applies to your IRAS Corppass administrators. For a sister-site overview of filing rhythms, see Singapore Secretary Services on filing requirements.
Finally, don’t rely on the cheapest secretary. The hourly cost of a competent corporate secretary in Singapore is far less than the cost of a missed AR — let alone a director disqualification.
Conclusion
A Singapore company does not need to drown in compliance — but it does need a calendar. Anchored on your FYE, the major filings are predictable: ECI within 3 months, AGM within 6, AR within 7, Form C-S/C by 30 November. Layer on monthly CPF, quarterly GST, and annual IR8A and you have the full picture.
If you would like us to build your company’s calendar (and run the filings on it), Raffles Corporate Services provides corporate secretarial, bookkeeping, tax, and payroll services as a single package — so every date in this article is owned by one team rather than three. For a no-cost compliance health check, drop us a note via the Raffles Corporate Services website.
— The Editorial Team, Raffles Corporate Services