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Should I use an addendum or an amendment?

I'm not sure which one fits my situation because I need to add terms, but some parts of the agreement may also need updates.

Answer

In most cases, it is a good idea to use a Contract Amendment. An amendment allows you to both add new terms and change existing ones in the same document.

An addendum is usually more limited. It is mainly used to add extra information without changing the original terms.

What's the difference between an addendum and an amendment?

An amendment directly changes the contract. It can add, remove, or modify terms, while keeping the rest of the agreement in place.

An addendum typically adds new material that supports the contract but does not alter the existing wording. It is often used for extra details, schedules, or attachments.

Because of this, an amendment is more flexible when changes go beyond just adding information.

Which one fits your situation best?

If you only need to add something new without touching existing terms, an addendum may work. But if you also need to update or fix parts of the agreement, an amendment is usually the better choice.

Since your situation involves both adding and updating terms, an amendment is generally the more appropriate option.

What to do next...

  • List the terms you want to add and the ones you need to change.
  • Decide if any existing clauses need to be updated.
  • Use an amendment if both adding and modifying terms.
  • Have all parties review and sign the final document.

What to consider in your specific situation

While this general guidance applies in many cases, your situation may vary based on key details.

  • The type of contract and how it is structured.
  • Whether existing terms need to be changed or only added to.
  • The wording of your contract's amendment clause.
  • Any prior amendments or addenda already in place.
  • Local laws that may affect contract updates.
  • The importance of clarity for your business relationship.

Since every situation is different, consider more information through Rocket Copilot, a Legal Pro, or a legal document review to move forward with confidence.

Pro Reviewed
Published on 04/19/2026
Reviewed by Rustin B. Duncan, Esq.

At Rocket Lawyer, we follow a rigorous editorial policy to ensure every article is helpful, clear, and as accurate and up-to-date as possible. This page was created, edited and reviewed by trained editorial staff who specialize in translating complex legal topics into plain language, then reviewed by experienced attorneys to ensure legal accuracy.

Please note: This page offers general legal information, but not legal advice tailored for your specific legal situation. Rocket Lawyer Incorporated isn't a law firm or a substitute for one. For further information on this topic, you can Ask an Attorney.

Laura Bojart
Laura Bojart
Editorial Researcher and Copywriter

Laura Bojart is an SEO copywriter and editor at Rocket Lawyer. She researches legal and business topics and translates complex ideas into clear, practical content for everyday readers. With her background in journalism and endless curiosity, she approaches each subject by asking the questions readers are likely to have first, making legal information approachable and easy to understand even to those with no legal background.