Understanding Deeds Of Adherence In Australian Companies

Bringing new shareholders into your company is a big step - whether you’re rewarding a key employee, welcoming an investor, or expanding ownership as you grow. As your cap table evolves, it’s important that every shareholder plays by the same rules.

That’s where a Deed of Adherence comes in. It’s a simple tool that helps you onboard new shareholders quickly while keeping your existing governance framework intact.

In this guide, we’ll break down what a deed of adherence is, when you need one, how it works alongside your Shareholders Agreement, and practical steps to prepare and execute it correctly in Australia. We’ll also flag common pitfalls and how to avoid them so your business can scale smoothly.

What Is A Deed Of Adherence?

A deed of adherence is a short legal document a new shareholder signs to confirm they agree to be bound by your existing Shareholders Agreement (sometimes called a shareholders deed). It lets you “join” new parties to that agreement without renegotiating or re-executing the whole document every time someone new comes on board.

In practice, if your company already has a Shareholders Agreement that sets the ground rules for decision-making, share transfers, exits, and dispute resolution, a deed of adherence ensures later shareholders are automatically bound by the same rules.

How Does It Work With A Shareholders Agreement?

Think of the Shareholders Agreement as the master rulebook, and the deed of adherence as the “joining form.” The agreement typically includes a clause requiring new shareholders (by issue or transfer) to sign a deed of adherence before their shares are registered.

Once signed, the new shareholder becomes a party to the Shareholders Agreement and must comply with it as if they were an original signatory. The original agreement itself doesn’t change - you’re simply adding a new bound party via a short deed.

It’s also good practice to ensure your deed of adherence aligns with your Company Constitution so there are no inconsistencies between your core governance documents.

When Do You Need A Deed Of Adherence?

You’ll generally use a deed of adherence any time someone becomes a shareholder after your Shareholders Agreement is already in place, including:

• Issuing new shares to a co-founder or external investor
• Onboarding employees through an equity plan or options converting to shares
• Transferring shares from an existing member to a new holder
• Completing a capital raise (angel, seed, VC)

Most well-drafted agreements make this a condition for registration of shares. If you’re unsure, consider a Shareholders Agreement review so your documents clearly require deeds of adherence for new entrants.

How To Prepare And Execute A Deed Of Adherence

Putting a deed of adherence in place is straightforward when you follow a consistent process.

1) Check Your Shareholders Agreement

Confirm the clause that requires adherence and understand any specific wording or signing requirements (for example, whether the company or a director must countersign).

2) Draft A Short Deed That References The Agreement

The deed should identify the Shareholders Agreement (by date and title) and include the new shareholder’s commitment to be bound by its terms as if they were an original party. If you also use vesting or special rights, cross-refer to those documents to avoid gaps.

3) Execute The Deed Correctly

Ensure the deed is executed in line with Australian requirements. Many companies sign deeds under section 127 of the Corporations Act, so it’s worth aligning your approach with the guidance in signing documents under section 127. Electronic signing is common, but make sure your process fits your policies and the nature of the document - you can read more in our note on wet ink versus e-signatures.

4) Register The Share Issue Or Transfer Properly

After execution, complete the share issue or transfer and update the company’s register of members. Keep the signed transfer instrument (if applicable) and the deed with your records.

Important: the signed transfer form itself is not lodged with ASIC. However, you must notify ASIC of changes to member details and share structure within the required timeframes (for example, via ASIC’s online portal - historically done through Form 484). For a practical overview of what’s reportable, see our guide to updating company details with ASIC. If you’re unsure about the mechanics of moving shares between members, our explainer on how to transfer shares is a helpful starting point.

5) Store Everything Together

Keep a consolidated pack with your Shareholders Agreement, each deed of adherence, board or director approvals, and any equity plan documents. Having a neat “equity file” saves time during due diligence and future raises.

What Should A Deed Of Adherence Include?

Every company is different, but most deeds of adherence include the following building blocks:

• Reference to the Shareholders Agreement: The date, parties and title of the agreement the new shareholder is joining.
• New shareholder details: Legal name, address and, if helpful, the relevant class and number of shares they will hold on completion.
• Promise to be bound: A clear statement that the new shareholder agrees to be bound by all the terms of the Shareholders Agreement as if they were an original party.
• Effective time: Usually on execution or on registration of the issue/transfer in the company’s register.
• Company acknowledgment (if required): Some agreements require the company or a director to countersign to confirm the accession.
• Governing law and notices: Typically align with the underlying agreement.

If you’re working with an Employee Share Option Plan (ESOP), ensure the deed of adherence meshes with your plan rules and any option exercise documents. You may also want to align timing with vesting schedules and buy-back rights. ESOPs can have tax consequences, so it’s sensible to pair the legal setup with separate tax advice.

Key Legal Considerations And Common Pitfalls

A deed of adherence is simple, but there are a few areas where companies can trip up. Here’s what to watch for.

Make Sure The Underlying Documents Are Consistent

The deed of adherence is only as strong as the documents it references. Check that your Shareholders Agreement and Constitution don’t conflict (for example, around pre-emptive rights, drag/tag, or share class rights). If you’re updating governance more broadly, consider a fresh Company Constitution at the same time as your shareholder arrangements.

Use Precise Execution Methods For Deeds

Deeds have specific execution requirements. If you rely on electronic signing, confirm your e-signing process is appropriate for deeds and consistent with section 127 if you’re using it. When in doubt, take advice and ensure your execution blocks are tailored.

Be Careful With Restraints And Confidentiality

Many Shareholders Agreements include confidentiality, non-solicit or non-compete clauses. Restraints must be reasonable in scope, geography and duration to be enforceable. If your agreement uses broad restraint language, consider getting restraint of trade advice before relying on it for new shareholders.

Don’t Forget ASIC Notifications (But Don’t Lodge The Transfer Instrument)

Keep your internal records (register of members, transfer instruments, board approvals) and notify ASIC of relevant member or share structure changes within statutory timeframes. The transfer instrument itself is kept with your company records - you don’t lodge that instrument with ASIC.

Align With Equity Plans And Vesting

If you’re issuing shares under an ESOP or similar incentive plan, check the plan rules and the Shareholders Agreement work together. For example, on a buy-back or leaver scenario, ensure the plan, the agreement, and your deed of adherence point to the same mechanics. If you’re new to equity for staff, our team can help you implement an Employee Share Option Plan and set up consistent documentation from day one.

Keep Your Capital Raising Documents In Sync

On a raise, investors often ask for tailored rights (e.g. information rights, reserved matters, or liquidation preferences). If you update your Shareholders Agreement to reflect those rights, ensure subsequent deeds of adherence bring in new investors on the same terms (or clearly document any differences). Where you’re allocating or changing rights between classes, align with your share class mechanics - see our overview of allocating shares in a startup for context.

Use The Right Tool: Deed Of Adherence vs Deed Of Accession

“Accession” and “adherence” are often used interchangeably. What matters is that the deed clearly joins the new party to the underlying agreement on the same terms. If you’re joining a party to a different type of contract (for example, a services or supply arrangement), a tailored Deed of Accession may be more appropriate.

Plan For The Exit

Future exits are smoother when transfer, drag-along and tag-along mechanics are clear and new shareholders have signed up to those rules. A clean set of deeds of adherence is something buyers and investors will expect to see in due diligence.

Key Takeaways

• A deed of adherence is a short “joining” document that binds new shareholders to your existing Shareholders Agreement without reopening the whole deal.
• Use it on new issues, transfers and raises so all shareholders are subject to the same rules from day one.
• Prepare a consistent process: check your agreement, draft the deed, execute properly (including for deeds), update your register and notify ASIC of reportable changes - but keep the signed transfer instrument on your internal file.
• Include clear references to the underlying agreement, accurate party details and a strong promise to be bound, and align with your Constitution and any equity plans.
• Watch out for common pitfalls like inconsistent documents, overbroad restraints, or execution errors; tailor the approach and get legal and tax input where needed.
• Keeping tidy records (agreements, deeds, approvals) will save time in future capital raises or exit due diligence.

If you’d like a consultation on deeds of adherence, Shareholders Agreements or onboarding new investors in your Australian company, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.