A subcontractor agreement is the written contract between a general contractor and a specialist hired to perform a defined portion of a larger project, and a good one locks down scope, payment, insurance, indemnity, worker classification, lien rights, termination, and dispute resolution before anyone sets foot on site. Each of those clauses allocates a specific risk. Leave one vague, and the risk defaults against whichever party didn’t insist on clarity. Industry-standard forms like AIA Document A401 and ConsensusDocs 750 cover most of the ground, but the scope, dollar figures, and state-specific terms still have to be tailored to the job.1AIA Contract Documents. Summary A401-2017, Standard Form of Agreement Between Contractor and Subcontractor2ConsensusDocs. Constructor and Subcontractor Agreement (Long Form) – 750
Scope, Parties, and Schedule
The scope of work is the single most important piece of the agreement. The subcontractor is only contractually responsible for what the scope includes, so vague language invites arguments about what’s in and what’s out. A workable scope identifies the specific tasks, materials, quality standards, and applicable building codes for the subcontractor’s portion of the project, and it also calls out what the subcontractor is not responsible for. Ambiguity tends to get resolved at the expense of whoever didn’t push for precision.
Both parties’ full legal names and registered business addresses belong in the preamble. The project site address and a description of the property should be specific enough to prevent jurisdictional confusion. Completion deadlines need to coordinate with the general contractor’s master schedule, and most agreements tie those milestones to liquidated damages if the subcontractor falls behind.
Payment Terms
Payment is where most subcontractor disputes start. A complete payment section covers three things.
The progress payment schedule sets when the subcontractor submits pay applications and how quickly the general contractor must process them. Retainage is the percentage withheld from each progress payment, typically 5% to 10%, released after the general contractor and owner accept the completed work.
The clause that deserves the most attention is the one governing what happens if the owner doesn’t pay. A pay-when-paid clause is a timing mechanism: the general contractor gets a reasonable window to collect from the owner before paying the subcontractor, but the payment obligation still exists. A pay-if-paid clause does something very different. It makes the owner’s payment a condition that must be satisfied before the subcontractor is owed anything, shifting the entire risk of owner nonpayment onto the sub. Several states refuse to enforce pay-if-paid clauses because of that one-sided risk. If you’re the subcontractor, read this clause before you sign.
Change Orders and Notice Deadlines
Work outside the original scope happens on almost every project. The agreement should require a written change order signed by both parties before any extra work begins, with agreed adjustments to the price and schedule. Written change order requirements have been upheld as binding for more than a century, and they protect both sides from undocumented cost overruns.
The practical risk for subcontractors is doing extra work on a handshake and then fighting to get paid for it. Some courts have allowed recovery when a general contractor or owner verbally directed additional work and then tried to hide behind the written-change-order requirement, but relying on that outcome is a gamble. Stop, document the changed condition in writing, get the change order signed, and then proceed. The same discipline locks in any schedule extension before the deadline passes.
Most agreements also include a notice provision requiring the subcontractor to flag potential claims for additional time or money within a set number of days. Missing that window can forfeit the claim entirely, even if the extra cost was legitimate. Read the notice deadlines before you start, not after a problem surfaces.
Insurance Requirements
Subcontractor agreements almost universally require Commercial General Liability coverage. Typical minimums are $1,000,000 per occurrence and $2,000,000 in the aggregate for bodily injury and property damage during the work. Workers’ compensation must also be maintained at state-required levels. The general contractor has a strong incentive to verify this, because in many states, if an uninsured subcontractor’s employee is injured, the general contractor becomes liable for the worker’s benefits.
Larger or higher-risk projects often require an umbrella or excess liability policy adding $1,000,000 to $5,000,000 above the CGL limits. The agreement should also require the subcontractor to name the general contractor and the project owner as additional insureds on CGL and umbrella policies, giving them direct rights under the subcontractor’s policy if a claim arises from the sub’s work.3U.S. Securities and Exchange Commission. SEC EDGAR First Amendment to Agreement for Guaranteed Maximum Price Construction Services
Completed operations coverage is the frequently overlooked detail. It protects against claims that surface after the subcontractor finishes the work, which matters because construction defect claims can appear years later. The agreement should specify a duration for this coverage rather than leaving it to default policy terms. Failing to maintain required insurance is treated as a material breach in most subcontractor agreements, giving the general contractor grounds for immediate termination.
Indemnification
The indemnification clause decides who pays when something goes wrong. In a typical subcontractor agreement, the subcontractor agrees to defend and hold the general contractor harmless from claims, legal costs, and settlements arising from the subcontractor’s negligence. The exact language matters, because the clause takes one of three forms with very different consequences.
- Limited form: the subcontractor covers losses only when the subcontractor is solely at fault. If the general contractor shares any blame, the subcontractor owes nothing.
- Intermediate form: the subcontractor covers losses when the subcontractor is partially or solely at fault, but not when the general contractor is exclusively negligent. Some versions make the subcontractor pay the full amount even when only partly to blame; others use a proportional split.
- Broad form: the subcontractor covers all losses regardless of fault, including the general contractor’s own negligence. This transfers the entire risk to the subcontractor.
Forty-five states have anti-indemnity statutes that limit or prohibit broad-form indemnification in construction contracts. In those states, a clause requiring the subcontractor to indemnify the general contractor for the general contractor’s sole negligence is void. If you’re drafting the agreement, an unenforceable indemnity clause gives you a false sense of security. If you’re signing it, know what form your state allows.
Worker Classification and Tax Documentation
The agreement should clearly establish the subcontractor as an independent contractor, not an employee. But labeling someone an independent contractor in a contract doesn’t make it legally so. Both the IRS and the Department of Labor look past the label to the actual working relationship, and getting classification wrong is one of the most expensive mistakes in subcontracting.
IRS Common Law Test
The IRS evaluates three categories of evidence: behavioral control (whether the hiring party directs how the work is done), financial control (whether the worker can realize a profit or loss), and the nature of the relationship (written contracts, benefits, permanence).4Internal Revenue Service. Topic No. 762, Independent Contractor vs. Employee A worker who sets their own hours, supplies their own tools, hires their own crew, and serves multiple clients looks like an independent contractor. A worker who shows up at a set time, uses the general contractor’s equipment, and takes direction on how to perform each task looks like an employee no matter what the agreement says.5Internal Revenue Service. Employee (Common-Law Employee)
DOL Economic Reality Test
The Department of Labor uses a separate six-factor test under the Fair Labor Standards Act focused on whether the worker is economically dependent on the employer or genuinely in business for themselves. The factors include opportunity for profit or loss based on managerial skill, the investments each party makes, permanence of the relationship, degree of control, whether the work is integral to the employer’s business, and the worker’s skill and initiative.6U.S. Department of Labor. Fact Sheet: Employee or Independent Contractor Classification Under the Fair Labor Standards Act No single factor controls. Misclassification under the FLSA can produce liability for back wages plus an equal amount in liquidated damages.7U.S. Department of Labor. Fair Labor Standards Act Advisor – Recovery of Back Wages
W-9, 1099-NEC, and Self-Employment Tax
Before processing any payments, the general contractor should collect a completed IRS Form W-9 to verify the subcontractor’s taxpayer identification number.8Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification Without a valid W-9, the general contractor may have to withhold a percentage of payments as backup withholding.9Internal Revenue Service. Instructions for the Requester of Form W-9
For calendar year 2026, the general contractor must file Form 1099-NEC for any subcontractor paid $2,000 or more in nonemployee compensation. The threshold was raised from $600 for payments made after December 31, 2025.10Internal Revenue Service. Form 1099-NEC and Independent Contractors Penalties for failing to file correct information returns scale with how late the correction comes: $60 per form if corrected within 30 days, $130 if corrected by August 1, and $340 per form if filed later or not at all. Intentional disregard raises the penalty to $680 per form.11Internal Revenue Service. Information Return Penalties
The subcontractor is responsible for their own self-employment taxes, currently 15.3% of net self-employment income.12Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) The agreement should state this explicitly so there’s no confusion about who owes what.
Lien Rights, Waivers, and Payment Bonds
Subcontractors who don’t get paid have a powerful remedy in most states: the mechanic’s lien. A lien is a legal claim against the property where the work was performed, and it can force a sale of the property if the debt isn’t resolved. The owner remains ultimately responsible for the lien even if they already paid the general contractor, which gives the lien real teeth.
Filing deadlines and preliminary notice requirements vary widely by state. Some states require filing within 90 days of finishing work; others stretch the window much longer. Many states also require the subcontractor to send a preliminary notice to the property owner early in the project to preserve lien rights. Missing either deadline can extinguish the right entirely.
Lien waivers are the flip side. General contractors and owners routinely require subcontractors to sign them as a condition of payment, and there are two types that matter:
- Conditional waiver: takes effect only when the stated condition is met, typically when the payment actually clears. This is the one to sign with a pay application.
- Unconditional waiver: takes effect immediately upon signing, regardless of whether payment has been received. Sign this only after the check has cleared your account.
Signing an unconditional waiver before the money is in your bank is one of the fastest ways to lose leverage on a project. If the check bounces, you’ve already surrendered your lien rights.
On federal construction projects, the Miller Act requires prime contractors to furnish performance and payment bonds when the contract exceeds $100,000.13Office of the Law Revision Counsel. 40 USC 3131 – Bonds of Contractors of Public Buildings or Works Because you can’t place a mechanic’s lien on federal property, the payment bond is the subcontractor’s alternative security. Most states have similar “Little Miller Act” statutes for state-funded projects.
Termination for Cause and for Convenience
Every agreement should address both types of termination because they carry very different consequences.
Termination for cause happens when the subcontractor fails to perform. The standard process involves a written notice of default followed by a cure period during which the subcontractor can correct the problem. Cure periods range from a few days to two weeks depending on the nature of the default. Skipping the notice-and-cure process and jumping straight to termination exposes the general contractor to a wrongful termination claim.14ConsensusDocs. Going Nuclear: Termination for Cause Without an Opportunity to Cure
Termination for convenience lets the general contractor end the subcontract for any reason, without the subcontractor having done anything wrong. When this happens, the subcontractor is entitled to recover costs already incurred, costs for settling their own subcontracts, and costs for protecting and preserving materials on site.15Acquisition.GOV. FAR 52.249-6 Termination (Cost-Reimbursement) What the subcontractor typically cannot recover is profit on work never performed. If the agreement is silent on termination for convenience, the general contractor may have no right to walk away without cause.
Dispute Resolution
Construction disputes are common, and how the agreement says they’ll be resolved matters almost as much as the substantive terms. Most subcontractor agreements require some form of alternative dispute resolution before anyone can file suit.
Arbitration is the most common option. The parties can require the arbitrator to have construction industry experience (judges and juries usually don’t), discovery is more limited and cheaper, hearings are typically faster, and proceedings are private rather than part of the public record.16ConsensusDocs. Some Pros and Cons of Arbitration Clauses in Your Contract The downside is that arbitration awards are very difficult to appeal, even when the arbitrator gets the law wrong.
Many agreements add mediation as a step before arbitration. Mediation brings in a neutral third party to help the sides negotiate, but neither party is bound by the mediator’s suggestions. It’s cheaper and faster than arbitration or litigation, and it tends to preserve the business relationship. A well-drafted clause layers these options: informal negotiation first, then mediation, then arbitration or litigation.
One detail that catches subcontractors off guard is multi-party joinder. Construction claims often involve more than two parties. If the owner sues the general contractor, the general contractor needs the ability to pull the responsible subcontractor into the same proceeding. The agreement should include joinder language so related claims are resolved together rather than in separate proceedings that could produce inconsistent results.
Signing and Record Retention
Both parties should sign the agreement before any work begins on site. Electronic signatures are legally valid under the federal Electronic Signatures in Global and National Commerce Act, and platforms like DocuSign or Adobe Sign create a time-stamped record that’s harder to dispute than a wet signature on a faxed copy.17National Credit Union Administration. Electronic Signatures in Global and National Commerce Act (E-Sign Act) All exhibits, including the scope of work, insurance certificates, and any special conditions, should be attached to the signed agreement as a single package. Each party keeps a fully executed copy.
For record retention, the IRS recommends keeping business tax records for at least three years from the filing date, with longer periods in specific situations: six years if income is substantially underreported, and seven years for claims involving bad debt deductions or worthless securities. Employment tax records should be kept for at least four years.18Internal Revenue Service. How Long Should I Keep Records? Federal contractors face a separate three-year retention requirement under FAR Subpart 4.7, running from the date of final payment.19Acquisition.GOV. FAR Subpart 4.7 – Contractor Records Retention Beyond tax rules, construction statutes of repose can extend liability for defective work from 4 to 15 years depending on the state. Keep the agreement and project records at least through the repose period, so you still have what you need if a defect claim surfaces years after the job is done.