Joinder Agreement Template
Pro template
What Is a Joinder Agreement?
Copy section linkA joinder agreement form is a legal form that lets a new person or company join an existing contract. The purpose is to make it easy to add someone new without changing the original agreement. The new party simply agrees to follow the same rules and terms as the original signers.
Why use it?
Makes it easy to add new investors, partners, or co-owners;
Saves time and legal fees;
Keeps contract terms the same for everyone;
Shows clearly who joined and when.
For example, a startup brings in a new investor. Instead of rewriting the original investor agreement, the new investor signs a joinder to follow the same terms.
Is a joinder agreement an amendment?
No, it's not. While an amendment changes terms in the original agreement, a joinder simply adds a new party who agrees to follow the original terms without altering them.
When To Use a Joinder Agreement Template
Copy section linkJoinder agreements are incredibly versatile and are used in many real-world scenarios. Here are some common ones:
- Adding a new investor to a startup that already has an investment agreement in place.
- Expanding a business partnership, where a new partner needs to join an existing partnership agreement.
- Real estate transactions, such as adding a co-owner to a mortgage or lease agreement.
- Mergers and acquisitions, where new subsidiaries need to be bound by corporate governance documents.
- Consortiums or joint ventures, when a new organization joins an established alliance.
Parties Involved in a Joinder Agreement
Copy section linkThere are typically three key roles in any joinder agreement:
- Original Contract Holder(s): The parties who signed the original agreement.
- Joining Party (Joining Entity): The individual or organization being added to the contract.
- Legal Representative (optional but recommended): A lawyer who ensures the joinder complies with legal standards and protects the parties involved.
Who signs a joinder agreement?
Both the joining party and at least one original contract holder sign the joinder agreement. In some cases, all original parties must approve the addition.
What Are the Key Terms in a Joinder Agreement?
Copy section link- Effective Date: The date the joinder takes legal effect.
- Obligations: What the joining party is agreeing to (e.g., financial contributions, compliance with rules).
- Rights: The joining party’s entitlements (e.g., voting rights, profit shares).
- Confidentiality Clause: Protects sensitive information already covered in the original agreement.
- Breach of Contract: Outlines consequences if the new party fails to meet obligations.
What is an example of a joinder?
Let’s say three founders form a company and sign an LLC operating agreement. Two years later, they bring in a fourth co-founder. Rather than redraft the entire agreement, the new member signs a joinder agreement — a short legal document used in a joinder, which is the process of joining an existing contract — to become part of the LLC under the existing terms officially.
How To Write a Joinder Agreement
Copy section linkFollow these steps to draft a clear and legally enforceable document:
1. Identify the original contract
Start by referencing the full name, date, and parties of the original agreement.
2. Add joining party details
Include the full legal name, contact information, and organizational status (individual, LLC, corporation, etc.).
3. Confirm acceptance of terms
State clearly that the joining party agrees to be bound by the terms of the original agreement as if they were an original signatory.
4. Set the effective date
Specify the date on which the joinder becomes valid.
5. Signatures and notarization
Ensure all necessary parties sign the document. Some contracts may require notarization or witnesses.
How the joinder agreement is connected with other documents?
This type of agreement is often used alongside core legal documents to bring new parties into an existing arrangement without altering the original terms. Below are common examples of where and how it connects:
- LLC Operating Agreement
When a new member joins a limited liability company, they typically sign a joinder to be bound by the terms of the original operating agreement. This maintains consistency in governance and ensures the new member assumes the same rights and responsibilities. - Investment Agreement
In funding rounds, new investors may join under an existing investment agreement by signing a joinder. This aligns them with the existing cap table, voting rights, liquidation preferences, and other negotiated terms, keeping all parties under one legal structure. - M&A Transaction Agreements
If a newly acquired entity becomes part of a broader corporate group, it may be required to join the original transaction documents (e.g., indemnity or non-compete clauses) through a joinder. - Real Estate Agreements
In property deals involving multiple parties, a new co-owner or lessee can be added to a lease, joint venture, or ownership agreement using a joinder. It helps preserve the original terms while expanding participation in the deal. - Consortium Agreements
Large, multi-party projects — such as those in infrastructure, tech, or research — often need to onboard new organizations. A joinder allows these new participants to enter into the consortium under the same terms, avoiding the need for renegotiation.
How to Start Your Joinder Agreement Now
Copy section linkDo you need to add a new partner, investor, or co-owner to an existing agreement? With Loio’s joinder agreement template, it’s quick and easy. You can fill in the form, make changes, and sign it — all in one place.
Use Loio’s simple PDF tool to enter names, dates, and other details in real time. No printing, scanning, or switching between tools. Just complete your document and get it signed — fast and hassle-free.
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