The Non-Solicitation Clause That Protects Your Customer List

Why this matters

A sub you bring onto a job meets your customers, sees your pricing, and learns how your accounts work. That access is the whole risk. A non-solicitation clause is the one contract term that says the sub cannot turn that access into their own book of business at your expense. It will not stop a determined bad actor by itself, but it converts a poach from a gray-area annoyance into a clear breach you can act on, and it makes most subs think twice.

Non-solicitation versus non-compete

These get confused, and using the wrong one weakens you.

• A non-compete bars the sub from competing at all, anywhere in a defined area, for a defined time. It is broad, harder to enforce, and facing growing legal and regulatory scrutiny, and against an independent sub who runs their own trade business it is usually overreach that a court may not uphold.
• A non-solicitation clause is narrower. It bars the sub only from pursuing your customers, and often your employees and other subs, not from working their trade generally. Because it protects a specific legitimate interest without keeping the sub from earning a living, it is generally more defensible, though it still must be reasonable to hold up.

For a subcontractor relationship, the non-solicit is almost always the right tool. You are not trying to put the sub out of business; you are protecting the accounts you introduced them to.

What it should actually cover

Scope it to a real interest, because a clause that reaches too far invites a court to void the whole thing.

• The customers you introduced them to, not every customer in the region. A sub who had their own relationship with a customer before you is not yours to fence off.
• Your employees and other subs, so a departing sub cannot strip your crew along with your accounts.
• Your confidential information: pricing, job details, and the customer list itself, which can qualify as a protectable business asset when you treat it as one.

Make it enforceable, not just present

A clause on paper is not the same as a clause that holds. Enforceability varies by state, so have an attorney draft or review it, and build in what courts look for:

• Reasonable scope, duration, and geography, tied to a genuine interest. A restriction that lasts a modest, defined period and covers the customers actually at risk reads as protection; one that lasts many years across a whole state reads as a restraint on the sub's livelihood and is more likely to be struck.
• Consideration, meaning the sub gets something of value in exchange for signing. The work you are giving them can serve as that consideration when the clause is signed at the start of the relationship; a clause sprung on an existing sub with nothing new offered is weaker.
• Clear definition of which customers are covered, so there is no argument later about who was yours.

The customer list as a protected asset

A non-solicit has far more teeth when your customer list is treated as confidential rather than public knowledge. Limit who can access it, mark it confidential, and pair the non-solicit with a confidentiality term. A list you guard looks like a trade secret worth protecting; a list you hand around freely looks like common information, and a court may treat it that way.

What it cannot do

Keep your expectations honest so you do not lean on the clause for something it will not carry:

• It cannot override a customer's free choice. If a customer independently decides to hire the sub, the clause targets the sub's solicitation, not the customer's decision, and the line between the two is often where disputes live.
• It cannot be so broad it gets voided. Overreach does not give you more protection; it risks giving you none.
• It is not self-enforcing. You still have to notice a breach and act on it. A clause nobody ever invokes protects nothing.

The mental model: a non-solicit does not lock the door, it just makes clear the door was locked, so when a sub walks through it you have a clean case instead of an argument.

References

• State law on non-solicitation and restrictive-covenant enforceability (varies by state; confirm with an attorney)
• Federal Trade Commission guidance on restrictive employment and contractor covenants
• See related: A Subcontractor Is Trying to Poach Your Customer (Decision Tree); The Non-Compete and What It Should Realistically Cover