Joinder Agreement (Australia)
Deed of Adherence — Australia
(Deed of Adherence)
This Joinder Agreement ('Joinder') is entered into on [Agreement Date] between:
[Joining Party Name] ([Joining Party ABN/ACN]) of [Joining Party Address] ('Joining Party'); and
[Existing Party Name] ('Existing Party'), being one of the parties to the Original Agreement (as defined below).
RECITALS
A. The [Original Agreement Name] dated [Original Agreement Date] ('Original Agreement') was entered into between [Original Parties].
B. The Joining Party wishes to join the Original Agreement [Joining Capacity].
C. The Existing Party has the authority under the Original Agreement (or by written consent of the relevant parties) to admit the Joining Party on the terms set out in this Joinder.
1. ACCESSION
1.1 In consideration of [Consideration] (receipt of which is acknowledged), and in consideration of the Existing Party's execution of this Joinder, the Joining Party agrees with each party to the Original Agreement to be bound by all the terms and conditions of the Original Agreement as if the Joining Party had been an original party to the Original Agreement in the capacity of [Joining Capacity].
1.2 From the date of this Joinder, the Joining Party will have all the rights and obligations of a party to the Original Agreement in their stated capacity.
1.3 The Joining Party's address for notices under the Original Agreement is: [Joining Party Address].
2. REPRESENTATIONS
2.1 The Joining Party represents and warrants that:
- it has the legal capacity and all necessary authority to enter into this Joinder and to be bound by the Original Agreement;
- it has read and understood the Original Agreement; and
- no consent, approval, or authorisation from any third party is required to enter into this Joinder, or if required, all such consents have been obtained.
3. GENERAL
3.1 This Joinder is governed by the laws of [Governing State], Australia, which is the same governing law as the Original Agreement.
3.2 This Joinder may be executed in counterparts, including by electronic signature under the Electronic Transactions Act 1999 (Cth), and each counterpart constitutes an original.
3.3 This Joinder takes effect as a deed when executed and delivered.
3.4 The Original Agreement remains in full force and effect, subject to the addition of the Joining Party as a party in the capacity stated.
EXECUTED as a deed on [Agreement Date].
Joining Party
________________
Signature
Date: ________________
Existing Party
________________
Signature
Date: ________________
What Is a Joinder Agreement (Australia)?
A Joinder Agreement in Australia records a corporate governance arrangement and the obligations of the company and its officers, consistent with the Corporations Act 2001 (Cth).
The most common use of joinder agreements in Australian practice is in the context of shareholders' agreements and investment documentation for private companies. Shareholder agreements typically contain a 'permitted transfer' clause requiring any transferee of shares to execute a joinder to the shareholders' agreement before the transfer is registered by the company. This confirms that the incoming shareholder is bound by the agreed governance, pre-emption rights, drag-along rights, and other provisions of the shareholders' agreement, maintaining the integrity of the original agreement as the membership of the company changes over time.
Similarly, in a start-up funding round, investors who join after the initial closing of the round typically execute a joinder to the existing subscription agreement or investment agreement, rather than requiring a new agreement to be drafted and signed by all original investors. This significantly reduces transaction costs and time.
In Australian law, a joinder agreement may be executed either as a simple contract (in which case consideration must be present) or as a deed (in which case consideration is not required). For formal commercial transactions — particularly in venture capital, private equity, and mergers and acquisitions — the Deed of Adherence is the standard form, executed with the solemnity of a deed under section 127 of the Corporations Act 2001 (Cth).
The Australia Joinder Agreement (Australia) template provides a straightforward, legally sound Joinder Agreement suitable for use in Australian commercial and corporate contexts.
The legal framework governing the Joinder Agreement (Australia) in Australia draws on several key statutes and regulatory bodies. Under the Corporations Act 2001 (Cth), the Australian Securities and Investments Commission (ASIC) regulates companies and financial services. Section 127 of the Corporations Act 2001 governs company execution of documents. The Australian Competition and Consumer Commission (ACCC) enforces the Competition and Consumer Act 2010 (Cth). The Australian Taxation Office (ATO) administers the Goods and Services Tax under the A New Tax System (Goods and Services Tax) Act 1999. The Federal Court of Australia and Supreme Courts of each state have jurisdiction over corporate disputes. Parties executing a Joinder Agreement (Australia) in Australia should confirm the document reflects current law, including any amendments enacted since the original drafting date. The Corporations Act 2001 (Cth) sets the foundational requirements.
When Do You Need a Joinder Agreement (Australia)?
A Joinder Agreement is required or appropriate in the following situations.
Share transfers in a company with a shareholders' agreement: Most shareholders' agreements require any transferee of shares to execute a joinder before the transfer is registered. If a shareholder sells, gifts, or transfers their shares to a new holder, the company should require the incoming shareholder to sign a joinder before updating the share register.
New investors joining an existing funding round: In angel investment and venture capital transactions, late-stage investors who join an existing round (after the initial closing) typically execute a joinder to the existing subscription agreement or investment agreement, agreeing to be bound on the same terms as the earlier investors.
Addition of a new partner or consortium member: When a new party joins an existing partnership, consortium, or joint venture, a joinder agreement (or deed of adherence) formally binds the new member to the terms of the existing partnership or consortium agreement.
Employee equity schemes: When an employee is issued shares under an employee share scheme and there is an existing shareholders' agreement, the employee should execute a joinder to the shareholders' agreement upon receiving their shares, confirming they are bound by the agreed governance and transfer restrictions.
Successors to existing contractual positions: In some commercial contracts (such as supply agreements, franchise agreements, and licence agreements), a provision allows the obligations to be transferred to a successor entity. In such cases, a joinder agreement formally binds the successor to the terms of the original contract.
Family law and estate planning: When shares in a private company pass to a deceased shareholder's estate or are transferred pursuant to a family law property settlement, the recipient may be required to execute a joinder to the existing shareholders' agreement.
What to Include in Your Joinder Agreement (Australia)
A well-drafted Australian Joinder Agreement should include the following key elements.
Identification of the original agreement: A precise description of the existing agreement to which the new party is joining — including the full title of the agreement, the date it was originally executed, and the names of the original parties. If the original agreement has been amended, the joinder should refer to the agreement as amended.
Identification of the joining party: The full legal name, address, and (for companies) ABN or ACN of the party joining the existing agreement.
Scope of accession: A clear statement that the joining party agrees to be bound by all the terms and conditions of the original agreement as if they were an original party, and (if relevant) in what capacity they are joining (e.g., as a shareholder, as an investor, as a partner).
Consideration: A statement of the consideration provided by the joining party (e.g., payment for shares, capital contribution) and by the existing parties (e.g., issuance of shares, admission to the partnership). If no consideration is given, the joinder should be executed as a deed.
Execution as deed or agreement: Whether the document is executed as a deed (under seal, witnessed, with the solemnity required by section 127 of the Corporations Act 2001 (Cth) for company execution) or as a simple contract. For commercial transactions, execution as a deed is recommended.
Governing law: A governing law clause specifying the applicable Australian state or territory law.
Counterparts: A clause permitting the joinder to be executed in counterparts (including by electronic signature under the Electronic Transactions Act 1999 (Cth)) to support remote signing.
Additional compliance elements for a Joinder Agreement (Australia) used in Australia include: Under the Corporations Act 2001 (Cth), the Australian Securities and Investments Commission (ASIC) regulates companies and financial services. Section 127 of the Corporations Act 2001 governs company execution of documents. The Australian Competition and Consumer Commission (ACCC) enforces the Competition and Consumer Act 2010 (Cth). The Australian Taxation Office (ATO) administers the Goods and Services Tax under the A New Tax System (Goods and Services Tax) Act 1999. The Federal Court of Australia and Supreme Courts of each state have jurisdiction over corporate disputes. Forms-legal.com provides this template as a starting point for Australia-compliant documentation.
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Reference this free template in an article, syllabus, or research note:
Forms Legal. (2026). Joinder Agreement (Australia) (Australia) [Legal document template]. Forms Legal. https://forms-legal.com/australia/business/contracts/joinder-agreement-australia
"Joinder Agreement (Australia) (Australia)." Forms Legal, 2026, https://forms-legal.com/australia/business/contracts/joinder-agreement-australia.
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note = {Free legal document template. Based on Corporations Act 2001 (Cth)}
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Frequently Asked Questions
A Joinder Agreement (also known as a Deed of Adherence or Accession Deed) is a legal document by which a new party agrees to be bound by the terms of an existing agreement as if they were an original party to that agreement. In Australia, joinder agreements are most commonly used in three contexts: (1) shareholder agreements, where a new investor or transferee of shares must sign a joinder to become bound by the existing shareholders' agreement; (2) investment agreements, where new investors join an existing funding round on the terms of the subscription agreement signed by earlier investors; and (3) consortium or partnership agreements, where a new consortium member or partner joins an existing arrangement. Under Australia law, Corporations Act 2001 (Cth), parties should seek independent legal advice from a qualified lawyer to confirm compliance with all applicable requirements. Under the Corporations Act 2001 (Cth), the Australian Securities and Investments Commission (ASIC) regulates companies and financial services. Section 127 of the Corporations Act 2001 governs company execution of documents. Forms-legal.com provides this template as a starting point for Australia-compliant documentation.
Yes. A Joinder Agreement is legally binding under Australian common law as a contract between the joining party and the existing parties to the original agreement. It must satisfy the basic requirements for contract formation: offer, acceptance, and consideration. Consideration is typically the mutual benefit of the joining party becoming bound by the agreement (e.g., receiving shares or an investment allocation in exchange for agreeing to be bound by the shareholders' agreement). Where there is no clear consideration — for example, where an existing shareholder executes a joinder after transfer — the joinder should be executed as a deed to ensure enforceability. Under Australia law, Corporations Act 2001 (Cth), parties should seek independent legal advice from a qualified lawyer to confirm compliance with all applicable requirements. Under the Corporations Act 2001 (Cth), the Australian Securities and Investments Commission (ASIC) regulates companies and financial services. Section 127 of the Corporations Act 2001 governs company execution of documents. Forms-legal.com provides this template as a starting point for Australia-compliant documentation.
Whether all existing parties need to sign a joinder depends on the terms of the original agreement. Most well-drafted shareholders' agreements and investment agreements include a clause stating that a new party may be admitted by executing a joinder agreement countersigned by the company and one or more designated existing parties (such as the founders or the board) — without requiring all shareholders to sign. If the original agreement does not contain such a provision, strictly speaking, all existing parties must execute the joinder for it to be binding on them, because a contract cannot impose obligations on parties who have not agreed to it. Under Australia law, Corporations Act 2001 (Cth), parties should seek independent legal advice from a qualified lawyer to confirm compliance with all applicable requirements. Under the Corporations Act 2001 (Cth), the Australian Securities and Investments Commission (ASIC) regulates companies and financial services. Section 127 of the Corporations Act 2001 governs company execution of documents. Forms-legal.com provides this template as a starting point for Australia-compliant documentation.
In Australian legal practice, the terms 'Joinder Agreement', 'Deed of Adherence', and 'Accession Agreement' are largely interchangeable — all refer to a document by which a new party adheres to an existing agreement. The term 'Deed of Adherence' is more commonly used in formal commercial transactions (particularly in venture capital and private equity), while 'Joinder Agreement' is a broader term also used in the United States. When executed as a deed, it does not require consideration to be enforceable under Australian law. When executed as a simple agreement (not a deed), consideration must be present. Under Australia law, Corporations Act 2001 (Cth), parties should seek independent legal advice from a qualified lawyer to confirm compliance with all applicable requirements. Under the Corporations Act 2001 (Cth), the Australian Securities and Investments Commission (ASIC) regulates companies and financial services. Section 127 of the Corporations Act 2001 governs company execution of documents. Forms-legal.com provides this template as a starting point for Australia-compliant documentation.
A Joinder Agreement (Australia) does not legally require a lawyer in Australia, and individuals and businesses may draft and execute the document independently. The Corporations Act 2001 (Cth) does not mandate legal representation for the creation or signing of this type of document. However, seeking independent legal advice from a qualified Australia lawyer is recommended for transactions involving substantial financial value, complex regulatory requirements, or cross-border elements where multiple legal jurisdictions may apply. A lawyer can verify that the document complies with all applicable statutory requirements, identify potential risks specific to the transaction, and confirm that the terms adequately protect the interests of all parties involved. The Federal Court of Australia has jurisdiction over disputes arising from this type of document, and Australian Securities and Investments Commission (ASIC) may impose additional compliance obligations depending on the nature of the underlying transaction. Professional legal review is particularly advisable where the document will be submitted to government agencies or used as evidence in legal proceedings.
This template is provided for informational purposes only and does not constitute legal advice. Laws vary by jurisdiction and change over time. Consult a qualified attorney for advice specific to your situation.Full disclaimer
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