A subcontractor agreement is a written contract between a general contractor and an independent worker or firm that defines the work to be done, the price, the schedule, and how risk is divided between the parties through insurance, indemnification, and dispute resolution. A well-drafted agreement prevents the mid-project arguments that drain budgets and protects both sides when something goes wrong. What follows is what the document should contain and why each piece matters.
The Core Terms
The Parties
Start with the full legal names, business names, physical addresses, and contact information for both sides. This sounds like boilerplate until someone needs to serve a legal notice or enforce a lien and discovers the contract names the wrong entity. If the subcontractor operates through an LLC or corporation, list both the entity and the responsible individual.
Scope of Work
This is where most contract disputes are born or prevented. Describe the specific tasks the subcontractor is responsible for, the materials to be used, the quality standards to meet, and any project plans or specifications that apply. Just as important: spell out what the subcontractor is not responsible for. Explicit exclusions prevent the slow creep of unpaid extra tasks that general contractors and subcontractors fight about constantly.
Timeline
Set specific start and completion dates. On larger projects, add interim milestones so the schedule has checkpoints rather than one distant finish line. Tie deadlines to measurable deliverables instead of vague phrases like “as soon as practicable.”
Payment Terms
State the total compensation, the payment schedule, how the subcontractor submits invoices, and how quickly payment follows. Common structures include milestone-based payments, periodic draws, or a lump sum at completion. Whichever structure you use, pin down the exact dollar amounts or percentages tied to each trigger and the number of days the contractor has to pay after receiving an invoice. Late payment interest rates vary by jurisdiction but commonly fall between 1% and 2% per month; the agreement can set its own rate within legal limits.
Payment Clauses That Shift Financial Risk
Two clauses deserve special attention because they decide who absorbs the loss when the property owner doesn’t pay the general contractor.
A pay-when-paid clause ties the subcontractor’s payment timing to when the contractor receives funds from the owner. The contractor still owes the money; the payment window just extends. Courts have generally interpreted these clauses to mean the contractor must pay within a reasonable time regardless of whether the owner has paid.
A pay-if-paid clause is far more aggressive. It makes the owner’s payment a condition the contractor must meet before the subcontractor gets paid at all. If the owner defaults, the subcontractor may never see a dime. A growing number of states have passed laws declaring pay-if-paid clauses void and unenforceable. In states that still allow them, courts tend to enforce them only when the contract language is unmistakably clear about shifting that risk. Before signing an agreement with a pay-if-paid clause, confirm whether your jurisdiction permits it.
Insurance and Bonding
Require the subcontractor to carry their own insurance and specify minimum coverage amounts. Most agreements require, at minimum, general liability and workers’ compensation. Depending on the trade, you may also need automobile liability, professional liability for design-build work, or pollution liability for hazardous materials. The contract should require the subcontractor to name the general contractor as an additional insured and provide certificates of insurance before work begins.
On larger projects, the agreement may require surety bonds. A payment bond guarantees the subcontractor will pay its own suppliers and lower-tier subcontractors. A performance bond guarantees the subcontractor will finish the work according to the contract. If the subcontractor defaults, the surety steps in to arrange completion or compensate the contractor.
On federal construction projects, the Miller Act requires both performance and payment bonds for any contract exceeding $100,000.1Office of the Law Revision Counsel. 40 USC 3131 – Bonds of Contractors of Public Buildings or Works State bonding thresholds vary. Even on private projects where bonds aren’t legally mandated, a general contractor may require them contractually.
The Legal Clauses That Do the Protective Work
Indemnification
An indemnification clause assigns financial responsibility when something goes wrong. In most subcontractor agreements, it requires the subcontractor to cover the general contractor’s legal costs and damages arising from the subcontractor’s own work, including injuries, property damage, and third-party lawsuits. The scope varies. Some clauses only cover losses caused by the subcontractor’s negligence; broader versions attempt to shift liability even for the contractor’s own mistakes. Several states restrict or prohibit these broader provisions, so the clause has to fit the law where the work is performed.
Dispute Resolution
Most subcontractor agreements send disputes to alternative dispute resolution rather than court. A typical clause requires mediation first, where a neutral third party helps the sides negotiate a voluntary settlement. If mediation fails, the clause usually escalates to binding arbitration, where an arbitrator issues a final decision that courts will enforce.2American Arbitration Association. AAA Clause Drafting Arbitration is faster and cheaper than a lawsuit, but appeal rights are extremely limited. “Binding” means final.
Termination
Define how either party can end the contract early. Termination for cause covers breaches, such as the subcontractor failing to perform or the contractor failing to pay. These clauses normally require written notice and a cure period, often 10 to 30 days, giving the breaching party a chance to fix the problem before the other side can walk. Some agreements also include termination for convenience, which allows one or both parties to end the contract without cause, usually with advance written notice and payment for work already completed.
Change Orders
Scope changes happen on virtually every project. The change order clause should require that any modification to the original scope be documented in writing, approved by both parties, and include adjustments to price and schedule before the extra work begins. This is where subcontractors get burned most often: the contractor verbally asks for additional work, promises a written change order will follow, then denies payment because no signed change order exists. A well-drafted clause helps, but the subcontractor still needs the discipline to refuse extra work until the paperwork is signed.
Flow-Down Provisions
A flow-down clause binds the subcontractor to the same obligations the general contractor owes the property owner under the prime contract. If the prime contract requires specific safety protocols, warranty periods, or quality standards, those requirements pass through. Before signing, the subcontractor should request a copy of the prime contract and read it, because flow-down clauses can impose requirements far beyond anything described in the subcontract itself.
Confidentiality
If the subcontractor will have access to proprietary information, trade secrets, or sensitive business data, include a confidentiality clause. It should define what counts as confidential, how long the obligation lasts after the project ends, and what happens if the subcontractor breaches it.
Intellectual Property Ownership
The default rule here surprises people. Under federal copyright law, an independent contractor generally owns the copyright to whatever they create, even if someone else paid for the work.3Office of the Law Revision Counsel. 17 USC 101 – Definitions The “work made for hire” doctrine, which automatically gives the hiring party ownership, covers independent contractor work only if two conditions are met: the work falls within one of nine narrow statutory categories (such as contributions to a collective work, translations, or parts of audiovisual works), and the parties sign a written agreement designating the work as made for hire.
Most subcontractor work falls outside those nine categories. If the contractor wants to own the designs, drawings, software, or other creative output, the agreement needs an explicit written assignment of intellectual property rights. Without one, the subcontractor may own what they produced, even though the contractor paid for it.
Mechanic’s Liens and Lien Waivers
A mechanic’s lien is one of the most powerful tools a subcontractor has to secure payment. It’s a legal claim filed against the property where the work was performed, and once recorded, it attaches to the title. The lien can block the owner from selling or refinancing the property until the subcontractor is paid. Every state has its own rules on how much notice the subcontractor must give, the deadline for filing after completing work (ranging from roughly 90 days to eight months depending on jurisdiction), and the enforcement procedures.
Because lien rights are so valuable, general contractors and owners frequently require subcontractors to sign lien waivers as a condition of payment. There are two kinds to understand. A conditional lien waiver takes effect only after the payment clears the subcontractor’s bank account; if the check bounces, lien rights stay intact. An unconditional lien waiver takes effect the moment it’s signed, whether or not the payment actually comes through. Signing an unconditional waiver before confirming the funds have cleared is one of the most common and avoidable financial mistakes in the industry. The agreement should specify which type will be used at each stage of payment.
Independent Contractor Status
Every subcontractor agreement rests on a legal foundation: the worker is an independent contractor, not an employee. That classification determines who pays employment taxes, who provides benefits, and who carries liability insurance. The IRS evaluates the relationship by looking at behavioral control, financial control, and the nature of the relationship between the parties.4Internal Revenue Service. Worker Classification 101: Employee or Independent Contractor Dictating hours, tools, and sequence looks like employment regardless of what the contract says. Project-based work with a defined endpoint, performed by someone who invests in their own equipment and takes on other clients, looks like independent contracting.5Internal Revenue Service. Independent Contractor (Self-Employed) or Employee
The agreement should include a clause stating the subcontractor is an independent contractor, is responsible for their own taxes, and is not entitled to employee benefits. This clause alone won’t save you if the working relationship actually looks like employment, but its absence makes a misclassification dispute much harder to defend.
Misclassifying an employee as a subcontractor exposes the hiring business to back taxes, penalties, and interest, including the employer’s share of Social Security and Medicare, federal unemployment tax, and the income tax that should have been withheld. Under Section 3509 of the Internal Revenue Code, the IRS may allow reduced penalty rates if the misclassification was unintentional, but that relief disappears if the IRS finds the business intentionally ignored its withholding obligations.6Internal Revenue Service. IRC Section 3509 – Determination of Employers Liability for Employment Taxes If classification is uncertain, either party can file IRS Form SS-8 to request an official determination.7Internal Revenue Service. About Form SS-8, Determination of Worker Status for Purposes of Federal Employment Taxes and Income Tax Withholding
Tax Reporting
Before making any payments, the general contractor should have the subcontractor complete IRS Form W-9, which collects the subcontractor’s legal name and taxpayer identification number. The IRS advises keeping completed W-9 forms on file for at least four years.8Internal Revenue Service. Forms and Associated Taxes for Independent Contractors If you pay a subcontractor $600 or more during the tax year, you must report those payments on Form 1099-NEC. The threshold applies to total payments across the year, not per project.9Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC Subcontractors handle their own estimated quarterly tax payments, including self-employment tax covering Social Security and Medicare. The agreement should reference these obligations so neither side is surprised at tax time.
Safety on Multi-Employer Sites
On construction sites where multiple contractors are working simultaneously, OSHA holds more than one employer responsible for safety. Under its multi-employer citation policy, OSHA assigns responsibility based on four roles: the employer that created a hazard, the employer whose workers are exposed to it, the employer responsible for correcting it, and the employer with general supervisory authority over the site (the controlling employer).10Occupational Safety and Health Administration. Multi-Employer Citation Policy A single employer can fill more than one role at once.
For general contractors, being the controlling employer carries real liability. OSHA can cite the general contractor for hazards created by a subcontractor if the general contractor failed to exercise reasonable care in detecting and correcting them. A contract clause saying the subcontractor is responsible for safety doesn’t substitute for active oversight. The agreement should require the subcontractor to maintain a written safety program, comply with all applicable OSHA standards, and provide documentation of worker safety training before starting work.
Signing and Record-Keeping
Once terms are negotiated, both parties should read the complete document, not skim it, to confirm it matches the deal they think they made. For complex or high-value projects, an attorney review before signing is worth the cost, particularly for indemnification, flow-down, and pay-if-paid language where the financial stakes are significant.
Both parties sign and date the agreement, and each keeps a fully executed copy. Along with the signed contract, both sides should maintain copies of certificates of insurance, any bond documentation, lien waivers exchanged during the project, and every change order. Those records are the evidence if a dispute surfaces months or years after the project wraps up.