What is Subcontractor Agreement?

A subcontractor agreement is a contract between a primary contractor -- someone who has been hired by a client to complete a project -- and a third-party specialist brought in to handle part of the work. When a freelance marketing consultant wins a campaign project but needs a graphic designer to produce assets, the designer hired for that purpose is a subcontractor. The subcontractor agreement governs the relationship between the primary contractor and the subcontractor; it is separate from the main client contract. The agreement defines the scope of work the subcontractor will perform, the payment terms, confidentiality obligations, intellectual property ownership, and any restrictions on the subcontractor contacting the primary client directly. A clear subcontractor agreement protects both parties and defines responsibility if something goes wrong.

A subcontractor agreement works by establishing the legal relationship between the hiring contractor and the subcontractor. It documents who is doing what, by when, and for how much. Critically, it clarifies that the subcontractor is an independent contractor -- not an employee of the primary contractor -- which affects tax treatment, benefits, and liability. The primary contractor collects a Form W-9 from the subcontractor and issues a Form 1099-NEC if total payments in the calendar year exceed $600. The subcontractor is responsible for their own self-employment taxes. The agreement should also address confidentiality: subcontractors often encounter sensitive client information and should be contractually bound to protect it. Intellectual property clauses should confirm that any work created under the agreement belongs to the primary contractor (and ultimately the client).

For freelancers who grow their businesses by bringing in other freelancers on larger projects, subcontractor agreements are essential. Without one, you face risks of scope disputes (did the subcontractor agree to unlimited revisions?), ownership confusion (who owns the work?), and client poaching (the subcontractor bypasses you to work directly with your client). A well-drafted subcontractor agreement includes a non-solicitation clause prohibiting the subcontractor from contacting your client directly for a period after the project ends. This protects the client relationship you built and compensates for the risk you took by bringing them in. As the primary contractor, you are responsible to your client for the subcontractor's work quality, so choose your subs carefully and document all work deliverables.

A subcontractor agreement governs the relationship between a primary contractor and a third party brought in to assist on a project already contracted to the primary. An independent contractor agreement governs the relationship between a hiring company or client and a freelancer directly. The key difference is the chain of responsibility: in a subcontractor arrangement, the primary contractor -- not the client -- hires and manages the subcontractor. The client typically does not have a direct legal relationship with the subcontractor. In an independent contractor agreement, the freelancer deals directly with the client. Both agreement types should address scope, payment, IP ownership, and confidentiality, but a subcontractor agreement also typically includes provisions preventing the subcontractor from bypassing the primary contractor to work directly with the end client.

To draft a subcontractor agreement: First, identify both parties clearly -- your business name and the subcontractor's name or business entity. Second, describe the scope of work in detail, specifying deliverables, deadlines, and revision limits. Third, state the payment terms -- amount, schedule (upon milestone, upon invoice, net-15, etc.), and method. Fourth, include confidentiality provisions preventing the subcontractor from disclosing client information. Fifth, include an intellectual property assignment clause confirming all work product belongs to you. Sixth, add a non-solicitation clause prohibiting the subcontractor from approaching your client directly for a defined period. Seventh, clarify that the subcontractor is an independent contractor, not an employee. Eighth, include termination terms and a dispute resolution mechanism. Have both parties sign before work begins.

Eonebill helps primary contractors manage subcontractor billing efficiently. When you bring in a subcontractor, you can use Eonebill to track their invoices alongside your own client invoices, ensuring your project margin stays visible. Our [free invoice generator](/free-tools/invoice-generator) keeps your client billing professional, and [Eonebill pricing](/pricing) includes plans that support managing multiple concurrent projects and payment streams.

1. Starting subcontractor work before the agreement is signed -- verbal agreements are difficult to enforce and create confusion about scope and payment. 2. Omitting a non-solicitation clause -- without it, subcontractors are free to approach your client directly, potentially cutting you out of future work. 3. Failing to collect a W-9 before first payment -- you need the subcontractor's tax information to issue a 1099-NEC at year end. 4. Not specifying who owns the work product -- without an IP assignment clause, the subcontractor may retain rights to creative work they produced. 5. Using an employment agreement template instead of an independent contractor agreement -- misclassifying a subcontractor as an employee creates tax and legal liability.

Learn more about related topics: [Non-Compete](/glossary/non-compete), [Liability Waiver](/glossary/liability-waiver), [Retainer Agreement](/glossary/retainer-agreement), [Retainer SOW](/glossary/retainer-sow).