When is a contract modification effective?

When is a contract modification effective?

• A. A After both parties sign and perform
• B. B Immediately
• C. C At the end of the term
• D. D Only with new consideration

Answer: (B)

A contract modification becomes binding the moment both sides reach mutual assent to the new terms. That agreement changes the contract going forward, so performance is governed by those modified terms from that point on. It doesn’t wait until the end of the term, nor does it hinge on completing performances first. In many contexts, especially for goods under the UCC, a modification can be enforceable without new consideration as long as it’s made in good faith, which reinforces that the key moment is when the parties agree. So the modification takes effect immediately upon that agreement.

A contract modification becomes binding the moment both sides reach mutual assent to the new terms. That agreement changes the contract going forward, so performance is governed by those modified terms from that point on. It doesn’t wait until the end of the term, nor does it hinge on completing performances first. In many contexts, especially for goods under the UCC, a modification can be enforceable without new consideration as long as it’s made in good faith, which reinforces that the key moment is when the parties agree. So the modification takes effect immediately upon that agreement.