This guide is maintained as a current resource for July 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Assignment of contractual rights explained under English law, including legal and equitable assignment, statutory requirements under the Law of Property Act 1925, restrictions, commercial uses, and key differences from novation in commercial contracts in England and Wales.
Assignment of contractual rights is a key mechanism in commercial contract law that allows one party to transfer their rights under a contract to another party. It is widely used in business transactions, including debt sales, financing arrangements, mergers, acquisitions, and receivables management.
In English law, assignment enables the “benefit” of a contract (such as the right to receive payment) to be transferred without creating a new contract. However, the original contract itself remains in force between the original contracting parties, subject to limited statutory and equitable rules.
Understanding assignment is essential for businesses dealing with complex commercial agreements, credit arrangements, and structured supply chains.
The Legal Meaning of Assignment
An assignment is the transfer of an existing contractual right (a “chose in action”) from one party (the assignor) to another (the assignee). Once validly completed, the assignee becomes entitled to enforce the right in their own name.
Key principles include:
- Only rights (benefits) can be assigned, not obligations
- The original contract remains unchanged
- The counterparty (the obligor) must perform in favour of the assignee once notified (in legal assignments)
Assignment is governed by both common law and statute, particularly section 136 of the Law of Property Act 1925.
What Can Be Assigned?
In commercial practice, the following rights are commonly assigned:
- Rights to receive payment under invoices or contracts
- Debt obligations owed by customers or clients
- Rights to claim damages under a contract
- Receivables in financing arrangements
- Certain intellectual property rights (where permitted)
However, not all contractual rights can be assigned. Restrictions include:
- Personal service contracts (where performance depends on specific skill or trust)
- Rights expressly prohibited from assignment in the contract
- Obligations or “burdens” under a contract (these require novation, not assignment)
Legal vs Equitable Assignment
English law recognises two main types of assignment.
Legal assignment (statutory assignment)
A legal assignment must satisfy strict requirements under section 136 of the Law of Property Act 1925:
- It must be in writing and signed by the assignor
- It must be absolute (not conditional)
- It must transfer the whole of the right
- Written notice must be given to the party owing the obligation
When these conditions are met, the assignee can sue in their own name without involving the assignor.
Equitable assignment
Where the statutory requirements are not fully met, an equitable assignment may still exist.
This typically arises where:
- Notice has not yet been given
- Only part of a debt is assigned
- Formalities are incomplete
An equitable assignment is still recognised by courts, but enforcement may be more procedurally complex.
Key Legal Principles Governing Assignment
1. No transfer of obligations
A fundamental rule is that obligations cannot be assigned. A party cannot transfer their contractual duties without the consent of the other contracting party. This would require a novation, not an assignment.
2. Consent is usually not required
In most cases, assignment of rights does not require the consent of the counterparty, unless the contract includes a valid “no assignment” clause.
3. The assignee takes subject to existing defences
The obligor can rely on any defences or set-off rights they had against the original party. The assignee cannot acquire greater rights than the assignor possessed.
Assignment vs Novation
It is important to distinguish assignment from novation:
- Assignment: transfers rights only; the original contract remains in place
- Novation: replaces one party with another and transfers both rights and obligations
Novation requires the consent of all parties, whereas assignment generally does not.
How Assignment Works in Practice
Step 1: The agreement to assign
The assignor and assignee enter into an assignment agreement, setting out the rights being transferred.
Step 2: Compliance with legal requirements
If a legal assignment is intended, statutory requirements must be satisfied, including written form and notice.
Step 3: Notice to the obligor
The party responsible for performance (such as paying a debt) must be informed so they know to discharge obligations to the assignee.
Step 4: Enforcement by the assignee
Once effective, the assignee can enforce the right directly, including issuing court proceedings if necessary.
Common Commercial Uses of Assignment
Assignment is widely used in business and finance, including:
- Invoice factoring and debt purchase
- Bank lending and security arrangements
- Sale of business receivables
- Insurance claims transfers
- Corporate restructures and acquisitions
In these contexts, assignment improves liquidity and allows businesses to manage financial exposure efficiently.
Restrictions and Limitations
Assignment may be restricted or invalid in certain situations:
Contractual restrictions
Many contracts include anti-assignment clauses requiring consent or prohibiting transfer altogether.
Personal contracts
Rights based on personal skill, trust, or confidence are generally non-assignable.
Statutory or regulatory limits
Some rights are governed by specific legal frameworks that restrict transfer.
Partial assignments
These may only operate in equity and may complicate enforcement.
Risks and Legal Issues
Improper assignment can lead to legal disputes, including:
- Invalid transfer due to breach of contract terms
- Uncertainty over who is entitled to payment
- Double liability risks if notice is not properly given
- Litigation over priority between competing assignees
- Enforcement delays where equitable assignment applies
Careful drafting and compliance with statutory requirements are essential to reduce these risks.
Time Limits for Enforcement
Once a contractual right is assigned, enforcement remains subject to general limitation rules under the Limitation Act 1980:
- Typically 6 years for contract claims
- 12 years for deeds
The assignment does not reset limitation periods.
Common Questions
Can all contracts be assigned?
No. Only the benefit of a contract can usually be assigned, and some rights are legally or contractually non-transferable.
Does the other party need to agree?
Not usually, unless the contract restricts assignment or the right is personal in nature.
Can obligations be assigned?
No. Obligations require novation with consent from all parties.
Does assignment create a new contract?
No. The original contract remains in place; only the right to enforce it changes.
Key Takeaways
Assignment of contractual rights allows a party to transfer the benefit of a contract to another person without altering the underlying agreement. It is a key commercial tool used in finance, business sales, and debt management. English law distinguishes between legal and equitable assignment, with statutory rules governing formal requirements such as writing and notice. While assignment is generally permitted, it cannot transfer obligations, and may be restricted by contract terms or the nature of the right involved. Proper understanding of assignment is essential for managing risk and ensuring enforceable commercial arrangements.
