How to Amend Your Singapore Company’s Constitution: Special Resolution and ACRA Lodgement Explained

Most Singapore companies adopt a constitution the day they incorporate and never look at it again, until the day they need to. Perhaps an investor wants a new class of preference shares, a co-founder wants drag-along rights before a trade sale, or the board simply realises the model constitution it adopted five years ago no longer fits a business that has outgrown it. Whatever the trigger, the constitution does not amend itself.

Raffles Corporate Services works with a panel of experienced Singapore law firms who offer cost-effective and efficient legal service and advice. This article is general information only and is not legal advice.

Amending a company’s constitution in Singapore is a formal, statutory process, not a matter of the directors quietly updating a Word document and moving on. It requires a special resolution passed by members, correct notice of the general meeting, attention to any entrenched clauses that demand more than the usual majority, and a lodgement with ACRA within a strict deadline. Get any one of these steps wrong and the amendment may not take effect at all, leaving the company operating under a constitution it thinks it has changed but has not.

This article sets out exactly how to amend a company constitution in Singapore: the legal basis under the Companies Act 1967, the special resolution and notice requirements, how entrenchment provisions work, what ACRA needs and by when, and the practical triggers that most often send Singapore SMEs back to their constitution after incorporation. If you are looking instead at whether to adopt a model or tailored constitution when you first incorporate, see our companion piece on model constitution vs tailored constitution in Singapore. This one is about changing what you already have.

The legal basis: section 26 of the Companies Act 1967

The general power to amend a Singapore company’s constitution sits in section 26 of the Companies Act 1967. Section 26(1) of the Companies Act 1967 provides that, unless the Act says otherwise, a company’s constitution may be altered or added to by special resolution. That “unless otherwise provided” wording matters, because one specific type of amendment, altering the objects clause, is instead governed by section 33, which has its own separate timeline (more on that below). For every other kind of amendment, a properly passed special resolution is both necessary and, subject to any entrenchment, sufficient. There is no separate ACRA approval step before the amendment can be put to members: the company resolves first, then lodges with ACRA afterwards.

What counts as a special resolution

A special resolution requires the approval of at least 75 percent of the votes cast by members entitled to vote, in person or by proxy, at a general meeting for which the required notice specifying the intention to propose the resolution as a special resolution has been given. This is a materially higher bar than an ordinary resolution, which only needs a simple majority, and it is deliberate: a company’s constitution is its foundational governance document, so the law does not let a bare majority rewrite it on the fly.

Notice of the meeting at which the special resolution is to be proposed must comply with the notice period set out in the constitution and the Companies Act, and must clearly identify the resolution as special. Private companies can shorten notice with the requisite member consent, and many SMEs also pass constitutional amendments by written resolution under the relevant provisions for private companies, avoiding the need to physically convene a meeting at all. Either way, the substantive threshold, 75 percent approval, does not change. For a refresher on notice periods and quorum for company meetings generally, see our guide to AGM requirements for Singapore companies.

Entrenchment provisions: when 75 percent is not enough

Section 26A of the Companies Act allows a company’s constitution to entrench specific provisions, meaning the constitution itself can require a higher threshold than the usual special resolution, or the satisfaction of some additional condition, before that particular clause can be altered. A common example is a clause requiring unanimous shareholder consent before the company’s share transfer restrictions, or a founder’s veto rights, can be changed. Entrenchment is typically built in when the constitution is first adopted or amended by agreement of all members, precisely so that minority shareholders cannot be outvoted on the protections they specifically bargained for.

If any part of your constitution is entrenched, do not assume a standard 75 percent vote will do the job. Check the entrenched clause’s own conditions first (they may specify unanimity, an independent director’s consent, or a shareholders’ agreement trigger) and satisfy those before or alongside the special resolution. Entrenchment is one of the main reasons a shareholders’ agreement and a constitution need to be read together, not treated as interchangeable documents; our article on shareholders’ agreements vs constitutions in Singapore covers how the two interact.

Lodging the amendment with ACRA

Once the special resolution is validly passed, section 26(2) requires the company to lodge with the Registrar, within 14 days after the resolution is passed, a copy of the resolution together with a copy of the constitution as altered (unless the Registrar dispenses with the latter). This is done through ACRA’s Bizfile+ portal. Miss the 14-day window and the company commits an offence, attracting a fine plus a daily default penalty for continued non-compliance, on top of the practical uncertainty of operating under an unregistered amendment.

There is one important exception. Where the amendment specifically alters the objects clause of the constitution, section 33 applies instead of section 26, and it runs on an entirely different clock. Under section 33, the company must first give written notice of the proposed objects amendment to members before the meeting, and once the special resolution is passed, an application can be made to the court within 21 days by qualifying members who object to the change. The resolution altering the objects clause cannot be lodged with ACRA until that 21-day window has closed (or, if a court application was filed, until the court has determined it), and it must then be lodged within 14 days after that. Critically, ACRA has clarified in its published Registrar’s Interpretation that a special resolution must not mix an objects-clause amendment with amendments to other parts of the constitution in the same resolution, because the two lodgement timelines under sections 26 and 33 cannot both be satisfied by a single filing.

Step-by-step: general constitution amendment vs objects clause amendment

Common reasons Singapore SMEs amend their constitution

In practice, constitutional amendments cluster around a handful of recurring triggers as a company grows past its incorporation-day paperwork.

Adding new share classes

A company incorporated with only ordinary shares often needs to introduce preference shares, or a new class with different voting, dividend or redemption rights, when it raises funding or restructures family ownership. The constitution must authorise the class before shares of that class can be issued. See our comparison of ordinary vs preference shares in Singapore for what each class actually changes.

Changing share transfer restrictions

Model constitutions typically give directors a broad discretion to refuse to register a transfer. As shareholder bases grow more complex, companies often tighten or loosen this, add rights of first refusal, or introduce drag-along and tag-along mechanics so a majority sale can force, or a minority sale can piggyback on, an exit transaction. These mechanics interact closely with what different shareholding percentages already control under the Act; our guide to what each shareholding percentage controls in Singapore is a useful companion read before drafting them.

Updating the registered office or removing the objects clause

Administrative updates, correcting an outdated registered office reference or a defunct objects clause, are common, though as explained above, a genuine change to the objects clause itself pulls in section 33 rather than section 26.

Converting from a model constitution to a bespoke one

Many companies incorporate quickly using ACRA’s model constitution, then outgrow it once they take on investors, adopt a shareholders’ agreement, or need entrenched protections the model does not offer. Amending wholesale to a tailored constitution is procedurally identical to any other section 26 amendment, a special resolution followed by lodgement, but the drafting exercise is more involved. Our earlier piece on model constitution vs tailored constitution in Singapore explains what a bespoke document typically adds, and our overview of what a company constitution actually does is a good starting point if you are not sure which clauses matter most.

What happens if you operate in breach of an unamended constitution

Until an amendment is validly passed and, where required, lodged and registered, the company remains bound by its existing constitution, not the version the board thinks it has agreed to informally. Acting as though an amendment is in force before it is properly passed and registered creates real exposure. Directors who issue shares of a class the constitution does not yet authorise, refuse a transfer on grounds the current constitution does not support, or otherwise act outside the existing document, risk having those actions challenged by an aggrieved member or third party as ultra vires or simply invalid. A resolution that is passed but never lodged within the statutory deadline also exposes the company and its officers to the fine and default penalty for late lodgement, and creates a public record on Bizfile that is out of step with what the company believes its constitution says, a mismatch that tends to surface at the worst possible moment, such as during due diligence for a financing round or a sale.

The safer sequence is always: draft the amendment, check for entrenched clauses, pass the special resolution with proper notice, and lodge with ACRA within the deadline, before treating the new provisions as operative.

Getting it right the first time

Amending a Singapore company’s constitution is not difficult, but it is unforgiving of shortcuts. The special resolution threshold, the notice requirements, any entrenched clauses, and the ACRA lodgement deadline, 14 days under section 26, or the longer section 33 sequence for objects clause changes, all need to be satisfied in the right order. A rushed amendment that skips a notice requirement, mixes an objects-clause change into a general resolution, or misses the lodgement deadline can leave a company worse off than if it had never amended the constitution at all.

If your company is planning to add a share class, tighten transfer restrictions, build in drag-along or tag-along mechanics, or simply move on from a model constitution it has outgrown, it is worth having the resolution, notice and lodgement checked before the general meeting is called, not after. Raffles Corporate Services helps Singapore companies draft, amend and lodge their constitutions correctly the first time. Get in touch with Raffles Corporate Services to discuss your company’s constitution.

The Editorial Team, Raffles Corporate Services