Variation Agreements

Changing the Terms of an Existing Contract

Business relationships evolve. What made sense when you first signed a contract may no longer reflect reality — perhaps the scope of services has changed, pricing needs updating, delivery schedules have shifted, or new regulatory requirements need to be incorporated. When this happens, you need a Variation Agreement.

A Variation Agreement (sometimes called an Amendment Agreement or Deed of Variation) formally records changes to an existing contract. Without one, you risk uncertainty about what has actually been agreed, disputes about whether changes are enforceable, and confusion about which terms still apply.

Why Can’t You Just Agree Changes Informally?

In theory, some contracts can be varied by mutual agreement — even verbally or by conduct. But in practice, relying on informal changes is risky for several reasons:

• Many contracts contain “no oral variation” clauses — These require that any changes be made in writing and signed by both parties.
• Lack of evidence — Without a written record, it becomes a “he said, she said” situation if there’s a dispute.
• Uncertainty — Other clauses in the contract may be affected by the change, and without a formal variation, it may not be clear how they interact.
• Third party interests — If the contract involves or benefits third parties (such as guarantors or funders), informal changes could create complications.

When Do You Need a Variation Agreement?

Common situations where a Variation Agreement is needed include:

• Changing the price or payment terms
• Extending or shortening the contract duration
• Amending the scope of goods or services
• Updating delivery or performance schedules
• Adding new products or services to an existing arrangement
• Reflecting a change in applicable law or regulation
• Correcting errors in the original contract
• Updating data protection provisions
• Amending restrictive covenants or termination provisions

What Should a Variation Agreement Include?

Our Commercial Team will draft a Variation Agreement that clearly addresses:

• Identification of the original contract — Specifying which agreement(s) is/are being varied.
• The specific changes — Setting out exactly which clauses are being amended, deleted, or added, taking into account the agreement as a whole, not just a specific clause in isolation.
• Consideration — Ensuring the variation is supported by valid legal consideration (or, if executed as a deed, that it’s properly executed.
• Effective date — When the changes take effect.
• Signatures — Properly executed by authorised representatives of both parties.
• Governing law and jurisdiction — Confirming these remain the same (or changing them if needed).

Variation Agreement or Deed of Variation?

In most cases, a simple Variation Agreement is sufficient — provided both parties are giving something of value (consideration) in exchange for the change. However, if only one party is benefiting from the variation (for example, one party is agreeing to accept a lower price), a Deed of Variation may be needed. A deed does not require consideration but must be executed in a specific way — it must be signed, witnessed and delivered.

Our team will advise you on the correct approach for your situation.

How We Can Help

At Nelsons, our Commercial Team regularly drafts and advises on Variation Agreements for businesses across the UK. Whether you need a straightforward price amendment or a complex restructuring of contract terms, we ensure the changes are properly documented, legally effective, and commercially clear.

We’re based in Derby, Leicester and Nottingham, but we advise businesses throughout the UK and beyond.

Call us: 0800 024 1976  Submit an enquiry: Complete our online enquiry form