Contract Glossary
Addendum
Definition
An addendum is a new document you tack onto an existing contract to add terms that weren't in the original. Both parties sign it, and it becomes part of the deal — no need to rewrite the whole contract.
In Practice
Say you signed a 6-month consulting agreement, and now the client wants you to handle their social media too. Instead of drafting a new contract, you write an addendum that adds the social media scope and adjusts the fee from $3,000/month to $4,500/month. The original contract stays intact — the addendum just bolts on the new stuff.
Common in these contract types
Frequently asked questions about addendum
An addendum adds new terms. An amendment changes existing ones. If you're adding a new service to your contract, that's an addendum. If you're changing the payment deadline from Net 30 to Net 45, that's an amendment. Both need signatures from all parties.
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Create your contractThis content is for informational purposes only and does not constitute legal advice. For contracts with significant financial or legal implications, review by a qualified attorney is recommended.