Whenever a Singapore company’s directors change — whether a new director is appointed, a director resigns, dies, or has their particulars updated — Section 173 of the Companies Act 1967 requires the company to notify ACRA within strict timelines. Failure to lodge on time is an offence, attracts late filing penalties, and creates real problems during due diligence, banking onboarding and licence applications.
This guide explains the Section 173 notification framework, the practical filing process via BizFile+, and the common errors that trip up directors and company secretaries in 2026.
What is Section 173?
Section 173 of the Companies Act 1967 requires every Singapore company to maintain a register of directors, chief executive officers, secretaries and auditors, and to notify the Registrar (ACRA) of any change in particulars within 14 days. The 14-day clock runs from the date of the event — appointment, resignation, change of address, change of identification — not from when the company “gets around to” filing.
Section 173 sits within Part X Division 2 of the Companies Act and is supplemented by Sections 173A to 173J, which prescribe the contents of the register, particulars required, and notification mechanics.
Events triggering a Section 173 notification
Section 173 is triggered by any of the following:
- Appointment of a new director (subject to Section 145 resident director requirement);
- Resignation of a director;
- Removal of a director under Section 152;
- Death of a director;
- Change of director’s residential address;
- Change of director’s identification number (replacement of passport, NRIC renumbering);
- Change of director’s name;
- Appointment or cessation of a chief executive officer;
- Appointment or cessation of a company secretary (Section 171);
- Appointment or cessation of auditors (Section 205).
Each event has its own 14-day clock. If multiple changes happen in the same week, the company can lodge them together — provided every change is filed within 14 days of its own event date.
The 14-day rule and late-filing penalties
ACRA imposes a composition fee for late notification of director changes. The fee scales with the delay:
| Days late | Composition fee |
|---|---|
| Within 14 days | NIL — on time |
| 15 to 30 days | S$50 |
| 31 to 60 days | S$100 |
| 61 to 90 days | S$200 |
| 91 days or more | S$300+ and possible summons |
Repeat late filers can be summonsed under ACRA’s enforcement framework. Convicted directors face fines of up to S$5,000 and, for serious or wilful breaches, disqualification under Section 154 of the Companies Act.
The Section 173 filing process via BizFile+
Director changes are lodged via BizFile+, ACRA’s online portal:
- Log in to BizFile+ with Singpass or Corppass (Corppass is required for company secretaries acting on behalf of clients);
- Select “Update Officer/Auditor/Other Information”;
- Choose the company and the relevant event (appointment, resignation, change of particulars);
- Enter the effective date of the change;
- For appointments, upload the consent to act (Form 45) signed by the new director;
- For resignations, upload the resignation letter and supporting board resolution;
- Pay the filing fee (currently NIL for most changes, S$50–300 if late);
- Receive confirmation email and updated BizProfile.
The Section 173 filing automatically updates ACRA’s central register of directors, which is publicly searchable. Banks, regulators and counterparties rely on this register, so keeping it current is essential.
Director consent (Form 45)
A new director cannot be appointed without their written consent. Form 45 (Consent to Act as Director) must be signed by the appointee before the appointment is filed. The form confirms that:
- The appointee is at least 18 years old;
- The appointee is not disqualified from acting as a director (bankruptcy, prior conviction, Section 154 disqualification order);
- The appointee consents to act in the capacity described;
- The particulars provided are true and correct.
Form 45 should be kept with the company’s statutory registers indefinitely.
Resignation letters and the effective date
A director who wishes to resign should provide a written resignation letter addressed to the company. The effective date is whatever the letter states — usually immediately, or on a specified future date. The company secretary then drafts a board resolution noting the resignation and lodges the Section 173 update within 14 days of the effective date.
Important: a resignation does not require board approval. The director’s notice to the company is sufficient. The company cannot refuse to accept a resignation, but it can — and should — file the Section 173 update promptly to remove the resigning director from the public register.
If the resignation would leave the company without a resident director (Section 145), the company must appoint a replacement within the statutory timeframe or face strike-off proceedings.
Change of address and identification
Directors must also notify the company within 14 days of any change to their residential address or identification number. The company then has its own 14 days to file the update with ACRA. Common triggers:
- Director moves house;
- Foreign director renews passport with new number;
- Singaporean director marries and changes name;
- Director becomes a permanent resident (NRIC issued).
These updates are particularly easy to miss. Many companies discover the discrepancy only when a bank, regulator or auditor requests the latest BizProfile.
Section 173 and corporate governance
Beyond the filing mechanics, Section 173 is a cornerstone of Singapore corporate governance. Every director appointment and change must be:
- Properly minuted in board resolutions or shareholder resolutions;
- Reflected in the statutory register of directors maintained at the registered office;
- Notified to ACRA within 14 days;
- Communicated to banks, regulators and key counterparties as required;
- Reviewed annually against the public BizProfile for accuracy.
Auditors typically inspect the statutory register during the annual audit and flag any discrepancy as a control finding.
Section 173 in due diligence and M&A
During an M&A transaction or a bank onboarding, the first document requested is the BizProfile. Any discrepancy between the BizProfile and the company’s actual director slate signals weak governance and may delay closing. Diligence teams routinely flag stale Section 173 records as a corporate housekeeping issue requiring rectification before completion.
Rectifying historical Section 173 errors
Where past director changes were never properly notified — director resigned years ago but still listed, or a director was never properly registered — the company should:
- Reconstruct the timeline of events with supporting documents;
- Pass a confirmatory board resolution;
- File the overdue notifications via BizFile+ and pay accumulated composition fees;
- Update the statutory register to match;
- Consider whether an advance ruling or court rectification under Section 188 is needed for serious omissions.
Final thoughts
Section 173 looks like an administrative formality, but it is one of the most-checked filings on any Singapore company. Banks, regulators, auditors, counterparties and acquirers all rely on it. Lodge every change within 14 days, keep the statutory register current, and treat Form 45 consents as legal documents rather than paperwork.
Engage a qualified company secretary if your team does not handle BizFile+ filings regularly — the late-filing fees and reputational risk easily outweigh the cost of professional support.
— The Editorial Team, Raffles Corporate Services