Are my customer contracts transferable when I sell?

Buyers often assume the customer base comes with the business simply because the business is being sold. In an asset sale, that is not automatic — a contract is a relationship between two specific parties, and swapping one of them out generally needs the other side’s agreement unless the contract itself, or the law, says otherwise.

Asset sales versus share sales change the starting point

In a share sale, the corporation itself does not change — the buyer acquires the shares, the company keeps operating under the same legal identity, and its contracts generally continue without needing anyone’s consent. In an asset sale, the buyer is acquiring specific assets and contracts out of that corporation, and each contract has to be assigned individually unless it says assignment happens automatically on a sale of the business.

What the contract itself usually says

Most commercial contracts of any size address assignment directly, and the clause controls over any general assumption either party makes. Some allow assignment freely, some require the other party’s written consent, and some prohibit it outright or make a change of ownership an automatic trigger for termination. Reading every material customer contract for this clause is standard due diligence, not an optional extra.

Silence in the contract does not mean the answer is yes

Where a contract says nothing about assignment, general contract law principles fill the gap, and the answer still is not a blanket yes. Personal-services and relationship-dependent contracts are typically harder to assign without consent than straightforward supply contracts, and a counterparty unhappy about the change of ownership can sometimes resist even where the legal analysis favours the buyer, simply by being difficult about performance afterward.

Customer data comes with its own layer

Where customer contracts involve personal information, transferring that information to a buyer raises separate privacy obligations that exist independently of what the contract says about assignment. A well-run due diligence process treats the customer contract list as something to review clause by clause, not a number that transfers by assumption.