Singapore Company Constitution: A Practical Guide for Founders

Every Singapore company must have a constitution lodged with ACRA at incorporation. There are no exceptions. The company constitution is a mandatory legal document that defines how your company is governed internally, and ACRA requires it as part of the incorporation application.

Your immediate next steps:

• Choose your approach: Adopt the ACRA Model Constitution (faster, lower cost) or draft a bespoke constitution (required for complex share structures or investor protections).
• Prepare subscriber signatures: All founding shareholders must sign the constitution before lodgement.
• Lodge via BizFile: Submit the signed constitution or select the Model Constitution option through BizFile during the incorporation application.
• Appoint a company secretary within six months of incorporation to maintain ongoing compliance and record-keeping.

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Key Takeaways

A Singapore company constitution is a mandatory statutory contract lodged at incorporation, and the choice between the Model Constitution and a bespoke document determines your governance flexibility for years ahead.

Point	Details
Constitution required at incorporation	Every Singapore company must lodge a constitution with ACRA via BizFile before incorporation is complete.
Model vs. bespoke decision	Adopt the Model Constitution for simplicity; draft bespoke if you have multiple share classes, investor protections, or entrenchment needs.
Special resolution threshold	Amending the constitution requires at least 75% of votes cast, and entrenching provisions can set a higher threshold.
Signed copy at registered office	A signed constitution must be kept at the registered office at all times and made available for inspection.
Vivos incorporation support	Vivos provides fixed-fee incorporation packages covering constitution drafting, BizFile filing, and ongoing corporate secretarial compliance.

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Table of Contents

• What a company constitution is and why it binds everyone in your company
• Mandatory contents under the Companies Act and what you cannot leave out
• Model Constitution versus bespoke: how to choose the right option
• How to submit your constitution through BizFile at incorporation
• How to amend the constitution: resolutions, filing, and timing
• Common customizable clauses and how to draft them without creating future disputes
• Regulatory risks, penalties, and record-keeping obligations you need to know
• How Vivos supports constitution drafting, incorporation, and ongoing compliance
• The pitfalls most founders only discover after it’s too late
• Vivos handles your constitution drafting and corporate secretarial filing
• Sources

What a company constitution is and why it binds everyone in your company

Singapore replaced the separate Memorandum and Articles of Association with a single document called the Constitution. This consolidation means founders no longer manage two separate governing instruments. The Constitution is now the single governing document for every Singapore-incorporated company.

Once lodged with ACRA, the constitution becomes a statutory contract. It binds the company, its members (shareholders), directors, and company secretary. That legal effect is not symbolic. A shareholder can enforce a constitutional provision against the company, and the company can enforce it against a member, in the same way parties enforce a commercial contract.

The constitution is the foundational contract of your company. Every decision about share transfers, director appointments, dividend distributions, and meeting procedures flows from it. Founders who treat it as a formality often discover its importance only when a dispute arises.

Who is bound and what they must do:

• Company: Must act within the powers and procedures the constitution sets out.
• Members/shareholders: Bound by share transfer restrictions, pre-emption rights, and voting procedures.
• Directors: Governed by appointment, removal, quorum, and authority clauses.
• Company secretary: Responsible for maintaining a signed copy of the constitution at the registered office, accessible during normal office hours, and for lodging amendments with ACRA.

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Mandatory contents under the Companies Act and what you cannot leave out

Section 22 of the Companies Act specifies the minimum contents every constitution must include. Missing any of these items creates a defective document that ACRA will reject.

Statutory minimums under Section 22:

• Company name (exactly as registered with ACRA)
• Statement of limited liability (for companies limited by shares)
• Description of share capital and classes of shares
• Registered office address in Singapore
• Subscriber details (names and addresses of founding shareholders)

Beyond these minimums, most constitutions include a standard set of governance provisions:

• Director appointment and removal procedures
• Board meeting quorum and voting rights (including casting vote)
• General meeting notice periods and procedures
• Share transfer mechanics and pre-emption rights
• Dividend declaration procedures
• Company secretary appointment

Statutory constraints you cannot override: The Companies Act sets floors, not ceilings, for resolution thresholds. Ordinary resolutions require a simple majority (more than 50% of votes cast). Special resolutions require at least 75%. You can set higher thresholds in your constitution, but you cannot set them lower than these statutory floors.

Pro Tip: Always define key terms in a dedicated definitions clause at the front of the constitution. Ambiguous terms in operative clauses are the most common source of shareholder disputes, and a clear definitions section resolves most of them before they escalate.

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Model Constitution versus bespoke: how to choose the right option

The Companies (Model Constitutions) Regulations 2015 prescribe the Model Constitution for private companies limited by shares (First Schedule) and a separate schedule for companies limited by guarantee. ACRA makes the Model Constitution available as a direct download, and founders can adopt it at incorporation without uploading a separate document.

Advantages of adopting the Model Constitution:

• No drafting cost or legal fees for the constitution itself.
• Fully compliant with the Companies Act out of the box.
• Faster incorporation process.
• Choosing “in force from time to time” means the constitution automatically tracks future regulatory changes, reducing the need for manual amendments.

Limitations of the Model Constitution:

• No provision for multiple share classes (preference shares, convertible notes).
• No investor protection clauses (anti-dilution, information rights, drag-along/tag-along).
• No entrenching provisions for minority shareholders.
• No reserved matters or veto rights for specific shareholders.
• Standard pre-emption rights may not match investor term sheet requirements.

When a bespoke constitution is the right choice:

• Your cap table includes or will include preference shareholders or convertible instruments.
• An investor’s term sheet requires specific constitutional protections.
• Founders want entrenchment provisions to protect minority rights.
• The company has complex reserved matters or board composition requirements.
• You are structuring a joint venture with defined governance rights for each party.

Pro Tip: If you are raising a seed or Series A round within 12–18 months of incorporation, draft a bespoke constitution from day one. Retrofitting investor protections via a constitutional amendment after a round closes requires a special resolution and ACRA filing, adding cost and delay at a time when you have other priorities.

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How to submit your constitution through BizFile at incorporation

Lodging the constitution is part of the standard incorporation application on BizFile. The process differs slightly depending on whether you adopt the Model Constitution or upload a bespoke document. A full walkthrough of the incorporation process is available in the Vivos Singapore incorporation guide.

1. Log in to BizFile using your Singpass or CorpPass credentials (or authorize a registered filing agent to act on your behalf).
2. Select “Incorporate a Local Company” and confirm the company type as a private company limited by shares.
3. Choose your constitution option: Select “Model Constitution” to adopt it without uploading a file, or select “Bespoke Constitution” to upload your signed PDF document.
4. If adopting the Model Constitution, specify whether you adopt it “in force from time to time” (recommended for most startups) or “in force at a point in time” (locks to the current version).
5. Enter subscriber details: Names, identification numbers, and the number of shares each subscriber takes up at incorporation.
6. Attach director consent forms (Form 45 or equivalent) for each proposed director, confirming their consent to act.
7. Confirm the registered office address in Singapore where the signed constitution will be kept.
8. Submit the application and pay the incorporation fee. ACRA typically processes straightforward applications within one to three business days.
9. Retain the signed original constitution at the registered office immediately upon incorporation. This is a statutory obligation, not an administrative preference.

Practical timing notes:

• Have all subscriber signatures on the bespoke constitution before you begin the BizFile application.
• Appoint a company secretary within six months of incorporation. A qualified secretary helps maintain lodgement compliance and record-keeping from day one.
• Keep an electronic copy of the signed constitution for the BizFile upload; ACRA requires a legible PDF.

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How to amend the constitution: resolutions, filing, and timing

Most constitutional amendments require a special resolution passed by at least 75% of votes cast. Ordinary resolutions (simple majority) suffice only for matters the constitution or the Companies Act expressly permits to be decided by ordinary resolution. Amending the constitution itself always requires the special resolution threshold.

This is a practical tool for protecting minority investors without relying on side letters or shareholders’ agreements alone. Entrenching provisions must be included in the constitution from the outset or added by a special resolution that itself meets the entrenching threshold.

Filing process after passing a resolution:

• Prepare the written special resolution or minutes of the general meeting.
• Lodge the amended constitution (or a copy of the resolution and the relevant amended clauses) with ACRA via BizFile within 14 days.
• Update the signed copy at the registered office to reflect the amendment.
• Notify the company secretary to update the company’s statutory registers.

Vivos’s governance and meeting management services cover the full amendment cycle, from drafting the resolution to lodging with ACRA.

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Common customizable clauses and how to draft them without creating future disputes

A bespoke constitution gives founders precise control over governance. The clauses below are the ones most frequently customized and most frequently the source of disputes when drafted poorly.

High-value clauses to customize:

• Share classes and rights: Define voting rights, dividend priority, liquidation preference, and conversion mechanics for each class. Vague class definitions create disputes at exit.
• Pre-emption on transfer: Specify the notice period, the pricing mechanism (agreed value, auditor valuation, or last-round price), and what happens if existing shareholders do not exercise their right.
• Reserved matters: List decisions that require shareholder approval above the ordinary resolution threshold. Common items include issuing new shares, taking on debt above a threshold, and changing the business scope.
• Board composition: State the number of directors each shareholder class may appoint and remove, and specify what happens when a shareholder’s ownership falls below a trigger percentage.
• Director quorum and casting vote: Define the quorum for board meetings and whether the chairperson holds a casting vote in deadlock situations.
• Dividend policy: Specify whether dividends require board recommendation plus shareholder approval, or board resolution alone.
• Deadlock resolution: Include a mechanism (buy-sell clause, independent valuation, mediation) for situations where the board or shareholders cannot reach a decision.

Drafting practices that reduce disputes:

• Use plain language for operative clauses. A clause that requires a lawyer to interpret at every board meeting is a poorly drafted clause.
• Specify notice periods in calendar days, not “reasonable notice.”
• Cross-reference the Companies Act where the statute sets the floor, so readers know the constitutional provision cannot be read below that floor.
• Avoid conflicting clauses. If the share transfer clause and the pre-emption clause use different pricing mechanisms, one will override the other in a dispute.

Pro Tip: Never rely on a shareholders’ agreement alone to protect governance rights. A shareholders’ agreement binds only its signatories. A constitutional provision binds every member, including future transferees who were not party to the original agreement.

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Regulatory risks, penalties, and record-keeping obligations you need to know

Failing to maintain constitutional compliance exposes directors and the company to enforcement risk under the Companies Act. The obligations are specific and non-negotiable.

Statutory record-keeping requirements:

• A signed copy of the constitution must be kept at the company’s registered office at all times.
• The constitution must be accessible for inspection during normal office hours.
• Any amendment must be reflected in the copy held at the registered office immediately after lodgement.
• The company must maintain a register of members, a register of directors, and a register of charges, all of which interact with the constitutional provisions on share classes and director appointments.

Non-compliance with record-keeping obligations is a criminal offence under the Companies Act. Directors who fail to maintain statutory records or lodge amendments within the required timeframe face fines. Unlawful clauses in a constitution (those that purport to override statutory minimums or grant powers the Act does not permit) are void and unenforceable, but their presence does not automatically invalidate the rest of the document.

Practical retention checklist:

• Signed original constitution (physical or certified copy at registered office)
• Special resolution minutes for every constitutional amendment
• Copies of all constitutions lodged with ACRA (including superseded versions)
• Director and shareholder registers, updated after every change
• Company secretary appointment records

Recommended retention period: at least five years after the relevant event, though many advisors recommend retaining constitutional documents for the life of the company plus five years. Engaging a corporate secretarial services provider ensures these obligations are tracked and met systematically.

Legal implications of invalid clauses:

• A clause that sets a special resolution threshold below 75% is void; the statutory floor applies automatically.
• A clause purporting to remove a member’s statutory right (such as the right to inspect certain registers) is unenforceable.
• Amendments not lodged within 14 days of passing are still valid between the parties but create a compliance gap that regulators can act on.

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How Vivos supports constitution drafting, incorporation, and ongoing compliance

Vivos provides end-to-end support for Singapore company incorporation, including constitution drafting, ACRA filing, and ongoing corporate secretarial compliance. Services relevant to founders at this stage include:

• Constitution drafting: Preparation of bespoke constitutions with tailored clauses for share classes, investor protections, reserved matters, and entrenchment provisions.
• Model Constitution adoption: Guidance on the “in force from time to time” versus “in force at a point in time” election and BizFile lodgement.
• ACRA/BizFile filing support: Preparation and submission of all incorporation documents, including director consent forms and registered office confirmation.
• Corporate secretarial services: Ongoing maintenance of statutory registers, lodgement of amendments, and management of annual compliance obligations.
• Amendment support: Drafting special resolutions, preparing amended constitutions, and filing with ACRA within the statutory deadline.

For foreign founders navigating Singapore’s requirements for the first time, Vivos’s foreign founder incorporation guide covers the practical friction points, from director appointments to registered office requirements.

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The pitfalls most founders only discover after it’s too late

The Model Constitution is the right starting point for most early-stage companies. Founders who adopt it at incorporation, choose “in force from time to time,” and appoint a qualified company secretary within six months will meet their statutory obligations without significant cost or complexity.

The problems arise at two predictable points. First, when a founder raises external capital and discovers the Model Constitution has no preference share provisions, no anti-dilution mechanics, and no reserved matters. Retrofitting these requires a special resolution, legal drafting fees, and an ACRA filing, all at a moment when the founder’s attention is on closing the round. Second, when a co-founder dispute surfaces and the share transfer clause is too vague to enforce cleanly.

The conventional wisdom is to keep the constitution simple and rely on a shareholders’ agreement for the complex governance terms. That approach has a structural flaw: a shareholders’ agreement binds only its original signatories. When shares transfer, the new holder is not automatically bound by the agreement. A constitutional provision, by contrast, binds every member automatically. Founders who understand this distinction draft the governance terms they actually need into the constitution from day one, rather than discovering the gap when it matters most.

The other underestimated risk is amendment timing. Directors who pass a special resolution and then delay lodging it with ACRA create a compliance gap. The amendment is valid between the parties from the date it passes, but the company is technically in breach of its filing obligation until lodgement. That gap is small, but it is the kind of detail that surfaces in due diligence and creates unnecessary friction at exactly the wrong moment.

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Vivos handles your constitution drafting and corporate secretarial filing

Founders setting up in Singapore face a clear choice: spend time navigating ACRA’s requirements independently, or engage a specialist who has done it hundreds of times. Vivos offers fixed-fee company incorporation packages that include constitution drafting or Model Constitution adoption, BizFile lodgement, director consent forms, and registered office setup. For companies that need bespoke governance structures, Vivos’s corporate advisory team drafts tailored constitutions with investor-protection clauses, entrenchment provisions, and reserved matters aligned to your cap table and investor requirements. Ongoing corporate secretarial support covers amendment lodgement, statutory register maintenance, and annual compliance, so founders stay focused on the business rather than the paperwork.

Contact Vivos to request a constitution review or a full incorporation package. The engagement starts with a straightforward scoping conversation, and pricing is transparent from the first discussion.

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Sources

Direct links to the statutory and regulatory resources referenced in this guide:

• Step 4.5: Preparing or adopting a company constitution | Accounting and Corporate Regulatory Authority
• Companies (Model Constitutions) Regulations 2015
• The constitution of a company | SingaporeLegalAdvice
• Pte Ltd Constitution Singapore: Companies Act 1967 | Captain Legal
• Model Constitution PDF (official isomer hosting)

This article provides general information on Singapore company law and is not a substitute for professional legal or corporate advisory advice. Confirm current requirements with ACRA or a qualified corporate services provider before proceeding.

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