Define: Variation Agreement

What Variation Agreement Means in a Contract

A Variation Agreement is the mechanism parties use when they want to change the terms of a contract that is already in force, rather than tearing it up and starting again. It sits alongside the original agreement, amending specific clauses, adding new obligations, or removing outdated provisions while leaving the rest of the contract intact. This makes it distinct from a wholly new agreement, since it only takes effect because an earlier binding contract already exists.

In practice, a Variation Agreement is used whenever circumstances change after signing, such as a shift in pricing, a change in delivery timelines, or the addition of a new party to the relationship. It gives both sides a documented, mutually agreed record of what has changed and when, which prevents disputes about whether an informal conversation or email actually altered the parties' legal obligations.

How Variation Agreement Is Defined or Measured

A Variation Agreement is typically defined as a written instrument signed by or on behalf of the existing parties, and any proposed new party, that modifies the original agreement. The definition usually specifies who must sign it, since some contracts require every original signatory to consent, while others permit variation with the approval of only certain authorized representatives.

There is no fixed format that determines whether a document qualifies as a Variation Agreement. What matters is that it clearly identifies the underlying contract, states which clauses are being changed, and confirms the parties' intention to be bound by the amended terms. Some contracts measure validity strictly by reference to a variation clause, which sets out formal requirements such as written form and signature by authorized individuals before any change can take legal effect.

• Identification of the original agreement being varied
• Clear description of the specific changes being made
• Signatures of all required parties, including any new party being added
• Confirmation that all other terms of the original agreement remain unchanged

Where Variation Agreement Appears in Agreements

Variation Agreements are common across commercial relationships of all kinds, from supply contracts and service agreements to leases and consultancy arrangements. In