Assignment vs Novation: Key Differences and When to Use Each in the UK

If you run a small business, you’ll eventually hit a moment where a contract needs to “move” from one party to another.

Maybe you’re selling part of your business, switching suppliers, refinancing, bringing in a new group company, or handing over a customer contract as part of a restructure. The commercial goal can be simple: keep the deal going, just with a different party.

Legally, though, how you do that matters. In most cases, you’ll be choosing between assignment and novation (or occasionally, a combination of both).

This guide breaks down the difference between assignment and novation in plain English, explains when each approach is appropriate, and highlights the risks that can trip up UK businesses if the paperwork isn’t handled properly. (This article is general information only and isn’t legal advice - contracts can vary, so it’s worth getting advice on your specific wording.)

What Is Assignment (And What Actually Changes)?

Assignment is a legal mechanism where one party to a contract (the “assignor”) transfers its rights under that contract to someone else (the “assignee”).

The key point is this:

• Assignment usually transfers rights, not obligations.

So, if you’re weighing up assignment or novation, a helpful starting question is: are you only transferring a benefit (like getting paid), or are you also transferring responsibilities (like performing services)?

Common Examples Of Assignment In Business

Assignment shows up all the time in everyday commercial arrangements, such as:

• Assigning the right to receive payment (for example, assigning invoices to a finance provider/factor).
• Assigning IP-related benefits (depending on what your IP contract allows).
• Assigning rights under a supplier or customer contract where you’re keeping the same performing party, but someone else will receive the benefit.

Do You Need Consent To Assign A Contract?

Sometimes yes, sometimes no - and this is where small businesses can get caught out.

In many commercial contracts, there’s an “anti-assignment” clause that says you can’t assign without the other party’s consent (or you can only assign to a group company, or only with written notice, etc.). If you ignore that clause, you may be in breach of contract and the other party may be able to treat the assignment as ineffective as against them (for example, they may refuse to recognise the assignee or continue dealing only with you). The exact outcome depends on the wording and the surrounding circumstances.

Before you assign anything, it’s worth checking:

• Does the contract allow assignment?
• If consent is required, what’s the process (email notice, signed consent, deed, etc.)?
• Is there a restriction on assigning to competitors or offshore entities?

If you’re unsure, a quick legal sense-check via a Contract Review can save you a lot of back-and-forth later (and reduce the risk that the “transfer” doesn’t work as intended).

What Doesn’t Assignment Do?

Assignment doesn’t usually:

• Replace a party entirely (the assignor often remains the contracting party for obligations);
• Transfer obligations (unless the contract structure and wording achieve something more complex); or
• Release the assignor from liability for past breaches or ongoing obligations.

This is why the novation vs assignment distinction matters - if you need a clean handover where the original party steps out, assignment alone is often not enough.

What Is Novation (And Why It’s Different)?

Novation is where an existing contract is replaced with a new contract, and a new party steps into the shoes of an old party.

In practical terms, novation typically means:

• One party leaves the contract;
• A new party joins the contract; and
• The continuing party agrees that the new party will be responsible going forward.

The headline difference between novation and assignment is this:

• Novation transfers both rights and obligations (and replaces a party).

Do You Need Consent For Novation?

Yes - novation requires the consent of all parties, because you’re changing who is bound by the contract. You normally document this in a novation agreement (often executed as a deed, depending on the structure and the underlying contract).

In many cases, businesses use a formal Deed Of Novation to clearly document the swap and reduce arguments later about whether obligations transferred properly.

Common Examples Of Novation In Business

Novation is common where performance matters and the other party cares who is doing the job, such as:

• Outsourced service agreements (e.g. IT support, marketing, facilities management) where a new provider takes over.
• Group restructures where contracts move from one group company to another.
• Business asset sales where the buyer needs to take over customer/supplier contracts as part of the deal.
• Construction and project contracts where a new contractor becomes responsible for delivery.

If you’re selling a business (or buying one), contract transfers can be a major part of the process - and they often sit alongside a broader Business Sale Agreement.

Assignment Vs Novation: The Key Differences (In Plain English)

If you’re trying to understand assignment vs novation quickly, here’s the side-by-side view most UK business owners need.

1) What Is Being Transferred?

• Assignment: transfers rights/benefits (e.g. the right to be paid).
• Novation: transfers rights and obligations (e.g. the duty to deliver services, plus the right to get paid).

2) Does A Party Get Replaced?

• Assignment: usually no. The original party often stays on the hook for obligations.
• Novation: yes. The new party replaces an old party.

3) Is Consent Needed?

• Assignment: depends on the contract terms (many contracts restrict it).
• Novation: yes - all parties must agree.

4) What About Past Liabilities?

This is a big practical point, and it often drives the assignment or novation decision.

• Assignment: doesn’t usually wipe the assignor’s historical liabilities, and it may not release them from ongoing obligations.
• Novation: can be drafted so that responsibility moves to the new party going forward, but you still need to be careful about how pre-novation liabilities are handled (this can be negotiated and drafted in the novation document).

5) Paperwork Complexity

• Assignment: can be simpler, but only if the contract permits it and you’re truly only transferring rights.
• Novation: usually more involved (because all parties sign, and you’re replacing contractual relationships).

If you want a deeper grounding in contract basics (like what makes an agreement binding and enforceable), it can help to start with UK contract law before you decide on the right transfer method.

When Should UK Businesses Use Assignment?

Assignment can be a great option when your business goal is to transfer a benefit without changing who performs the contract.

You might consider assignment where:

• You only need to transfer the right to receive money (common in receivables financing).
• You’re keeping the same service delivery entity, but another party will receive certain benefits.
• The contract expressly permits assignment (or the other party is happy to consent in writing).

Practical Example: Assigning A Right To Payment

Let’s say your business has a large invoice due from a customer in 60 days, but you want cash flow now. A finance provider may agree to advance you money in exchange for you assigning the right to be paid that invoice.

In that scenario:

• You’re not asking the finance provider to deliver your services.
• You’re just transferring a right (the receivable).

This is one of the clearest assignment situations.

Watch Outs With Assignment

For small businesses, the biggest risks usually are:

• Contract restrictions: an assignment done in breach of an anti-assignment clause may expose you to a breach claim and may not be recognised by the other party (depending on the clause and context).
• Trying to assign obligations: if you “assign” a contract but still have to perform it, you may not achieve your commercial goal.
• Customer/supplier confusion: if the other party isn’t properly notified, invoices, notices, and dispute communications can go to the wrong place.

Where the assignment needs to be formalised as a deed (or where you need a clean document trail), businesses sometimes use a deed structure similar to a Deed Of Assignment, depending on the contract and what’s being transferred.

When Should UK Businesses Use Novation?

Novation is usually the right choice when you need a full handover - meaning the new party will perform the contract and carry the obligations.

You should strongly consider novation where:

• You’re selling your business (or a business line) and the buyer needs to “take over” customer/supplier contracts.
• Your business is restructuring and you want contracts to sit in a different company (for risk, tax, or operational reasons).
• The contract involves ongoing services and the other party expects a specific entity to be responsible.
• The contract prohibits assignment (or it permits assignment of rights but not obligations), and you need obligations to move.

Practical Example: Switching Service Providers Mid-Contract

Imagine you run an ecommerce business and outsource fulfilment. Your current fulfilment provider is being acquired, and they want their new group company to take over the service contract.

If you agree, the cleanest way is often novation:

• The old provider steps out.
• The new provider steps in.
• You keep the same commercial arrangement, but with a new responsible party.

Watch Outs With Novation

Novation is powerful, but you’ll want to get the details right. Common pitfalls include:

• Not dealing with pre-novation liabilities: if there are disputes or service credits, who carries them?
• Not updating notices and payment clauses: a novation should align the practical “day-to-day” contract admin with the new party.
• Missing related documents: guarantees, security, or side letters may also need updating.

If the contract also needs changes (not just a party swap), you might deal with the amendments alongside the novation, similar to how you’d approach Amending A Contract in a controlled, documented way.

How Do You Decide Between Novation Vs Assignment? A Quick Checklist

It can feel technical, but you can usually narrow the right approach quickly by working through a few practical questions.

Step 1: What Are You Trying To Achieve?

• If you want to transfer a benefit only (like a payment right), assignment may work.
• If you want to transfer the whole role in the contract (benefits + responsibilities), you’re likely in novation territory.

Step 2: What Does The Contract Say?

• Is assignment allowed? Is consent required?
• Does the contract mention novation?
• Are there “change of control” or “no subcontracting” clauses that could be triggered by your proposed change?

Step 3: Does The Other Party Care Who Performs?

In many B2B contracts, the other party chose you for a reason - your expertise, creditworthiness, licences, team, or reputation.

If performance is important, the other party will often insist on novation (and may want due diligence on the incoming party).

Step 4: Are There Any Linked Arrangements?

Don’t forget related legal pieces that might need updating, for example:

• Personal guarantees or indemnities
• Security documents
• Data processing terms if personal data is involved (often relevant under the UK GDPR and Data Protection Act 2018)
• Ongoing service commitments that sit alongside your Master Services Agreement or statements of work

If your contract set is more than a single document (which is common), this is where professional drafting and a coordinated plan really pays off.

Step 5: Document It Properly

Even if everyone is friendly and “agrees on email”, you’ll usually want a properly executed document that:

• clearly identifies the contract being transferred;
• states what is transferring (rights only, or rights + obligations);
• confirms consent (where required); and
• handles practical admin (notices, payment details, effective date, transitional support).

This is one of those areas where DIY templates can create expensive ambiguity. If the transfer is business-critical, getting the paperwork drafted or checked by a lawyer is generally the safer option.

Key Takeaways

• Assignment vs novation is a common issue for UK small businesses when contracts need to move between parties, especially during growth, restructures, or business sales.
• Assignment typically transfers rights/benefits (like the right to receive payment), but usually does not transfer obligations or fully replace a party.
• Novation typically transfers rights and obligations and replaces a contracting party, so it’s often used for full handovers.
• Consent rules differ: assignment may be restricted by contract terms, while novation generally requires consent from all parties.
• The difference between novation and assignment matters most when you need the old party released and the new party to take full responsibility under the contract.
• Always check the contract wording first and document any transfer properly - an informal or non-compliant transfer can be ineffective (or lead to disputes) and may expose you to a breach of contract claim.

If you’d like help working out whether you need an assignment or novation (and getting the documents done properly), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.