To subcontract work properly, you confirm the person you’re hiring actually qualifies as an independent contractor, collect their tax and insurance paperwork, sign a written agreement that defines scope, payment, and risk, and then manage invoicing, safety, and tax reporting through project closeout. Skip any of those steps and you expose yourself to back taxes, personal liability for workplace injuries, mechanics’ liens on the project, or IRS penalties at year-end. The sections below walk through each stage in the order you’ll actually hit them.
Confirm the Worker Is Really a Subcontractor
Calling someone a subcontractor doesn’t make them one. The IRS looks at three categories of evidence to decide whether a worker is an independent contractor or an employee: behavioral control (whether you direct how the work gets done), financial control (who supplies tools, whether expenses are reimbursed, how payment is structured), and the type of relationship (written contracts, benefits, permanence). No single factor is decisive; the agency weighs the whole relationship to see who has the right to direct and control the work.1Internal Revenue Service. Independent Contractor (Self-Employed) or Employee?
The Department of Labor applies a separate six-factor economic reality test under the Fair Labor Standards Act, covering things like whether the work is integral to your business, how much the worker has invested in their own equipment, the degree of control you exercise, the worker’s opportunity for profit or loss, how much independent judgment the work requires, and the permanence of the relationship.2Federal Register. Employee or Independent Contractor Status Under the Fair Labor Standards Act, Family and Medical Leave Act, and Migrant and Seasonal Agricultural Worker Protection Act A worker can pass one test and fail the other, so both matter.
If the IRS later reclassifies your subcontractor as an employee, you owe back employment taxes and potentially penalties. Section 530 of the Revenue Act of 1978 can relieve you of that employment tax liability if you consistently filed 1099s for the worker, never treated anyone in a similar role as an employee after 1977, and had a reasonable basis for the classification such as industry practice or a prior IRS audit that didn’t challenge it.3Internal Revenue Service. Worker Reclassification – Section 530 Relief If you’re genuinely unsure, file Form SS-8 and let the IRS make the determination.4Internal Revenue Service. Completing Form SS-8
Collect the Paperwork Before Work Starts
Form W-9
Get a completed Form W-9 from every subcontractor before you cut a single check. It captures the subcontractor’s name and Taxpayer Identification Number, which you’ll need to file the 1099 at year-end. If the subcontractor won’t provide a TIN, or the IRS tells you the one you have is wrong, you’re required to withhold 24% of every payment as backup withholding.5Internal Revenue Service. Forms and Associated Taxes for Independent Contractors Skipping the W-9 can trigger a $50 penalty per failure under IRC 6723, adjusted upward for inflation each year.6Office of the Law Revision Counsel. 26 U.S. Code 6723 – Failure to Comply With Other Information Reporting Requirements
Certificate of Insurance
Ask for the Certificate of Insurance directly from the subcontractor’s insurance agent, not from the subcontractor. It should confirm active general liability and workers’ compensation coverage. General liability policies commonly carry a per-occurrence limit of $1,000,000 or more, but set your minimum based on the risk of the work. Workers’ comp is required in virtually every state, and in many jurisdictions the hiring contractor becomes personally liable for workplace injuries if the subcontractor fails to carry it. On federal maritime projects, the Longshore and Harbor Workers’ Compensation Act goes further: if a subcontractor doesn’t secure coverage, the prime contractor is treated as the employer of that subcontractor’s workers for insurance purposes.7U.S. Department of Labor. DBA Information
Licenses and Permits
Verify trade-specific licenses and local permits through the state licensing board’s online database. Hiring an unlicensed subcontractor can result in stop-work orders, civil fines, and liability for defective work. The project-delay cost usually hurts more than the fines.
Scope of Work
Write the scope in enough detail that both sides can tell when the job is done: tasks, materials, quality standards, deliverables. Vague scopes are where most subcontracting disputes begin. Once drafted, confirm with the subcontractor’s insurance agent that the described work actually falls within the policy’s coverage. A general liability policy covering interior finish work won’t help much if the subcontractor is also doing roofing.
Draft the Subcontract
Payment Terms
Spell out whether compensation is a lump sum, scheduled progress payments tied to milestones, or unit-rate pricing. On larger projects you’ll encounter two conditional payment clauses. A “pay-when-paid” clause is a timing mechanism: the subcontractor gets paid within a reasonable time after you receive payment from the client. A “pay-if-paid” clause is more aggressive, making client payment a condition precedent so the subcontractor bears the full risk if the client never pays. Courts in many states treat these very differently, and some refuse to enforce pay-if-paid clauses at all. Know which one you’re writing and how courts in the project’s jurisdiction read it.
Retainage
Retainage is the portion of each progress payment you hold back until completion, typically 5% to 10% of the contract value, to make sure the subcontractor returns for punch-list work. Several states cap how much you can withhold and set deadlines for releasing it after substantial completion. State the percentage, the release conditions, and whether it earns interest.
Change Order Procedures
Require every change to be documented in a written change order describing the new work, the price adjustment, and any schedule change, signed before the extra work begins. Courts routinely deny payment for extra work performed without a written change order, even when the owner verbally authorized it. Also require written notice from the subcontractor of any event that might become a change, so you can evaluate the impact before it turns into a dispute.
Indemnification
An indemnification clause requires the subcontractor to cover losses caused by their own negligence, including property damage, bodily injury to third parties, and defense costs. Coordinate the language with the insurance you verified so the obligation is actually backed by a policy. Some states limit or prohibit broad indemnification clauses in construction contracts, so tailor the wording to the project’s location.
Termination and Dispute Resolution
Include a termination-for-convenience clause that lets you end the relationship without proving fault, as long as you pay for completed work, plus a termination-for-cause provision covering abandonment, persistent defective work, or lapsed insurance. For disputes short of termination, a staged process (mediation first, then binding arbitration) usually saves time and money. Arbitration is faster and more private than litigation but limits your appeal options.
Liquidated Damages
If delay would cause real financial harm, set a specific dollar amount per day of delay. For the clause to hold up, the daily amount has to be a reasonable pre-estimate of the actual loss, and actual damages have to be hard to calculate precisely at the time of contracting. Courts will throw out any figure that looks like a penalty, so keep the documentation showing how you arrived at the number before anyone signs.
Flow-Down Clauses
A flow-down clause binds the subcontractor to relevant terms from your prime contract with the client. A vague blanket incorporation often isn’t enough. Courts in many jurisdictions limit generic flow-down language to work-related provisions like scope and specifications, and refuse to enforce it for risk-allocation terms like indemnification, insurance minimums, or dispute resolution. Safer: list the specific prime-contract provisions that apply and attach copies to the subcontract.
Sign the Contract and Issue Notice to Proceed
Before you sign, cross-check every document against the final contract. Confirm the Certificate of Insurance dates extend through projected completion. Verify that license numbers and legal business names in the contract match the documents on file. Fixing a discrepancy now is far cheaper than fixing it after mobilization.
Electronic signatures are legally valid for subcontracts. The Electronic Signatures in Global and National Commerce Act provides that a contract cannot be denied legal effect solely because an electronic signature was used in its formation.8Office of the Law Revision Counsel. 15 USC Chapter 96 – Electronic Signatures in Global and National Commerce Digital platforms also timestamp when each party signed, which helps if anyone later disputes validity. On very high-value contracts, some parties add notarization for identity verification.
Once the contract is fully executed, issue a written Notice to Proceed that sets the official start date and triggers the performance deadlines. The subcontractor should not mobilize before that notice. Starting work before insurance, bonding, and legal protections are in place is one of the most common and most avoidable mistakes in subcontracting. Keep digital and physical copies of everything.
Safety on Shared Worksites
On a worksite with multiple employers, OSHA won’t limit a citation to the subcontractor whose crew caused a hazard. The agency’s multi-employer citation policy recognizes four categories, and a prime contractor can fall into more than one:
- Creating employer: the company that caused the hazardous condition, citable even if only another employer’s workers are exposed.
- Exposing employer: the company whose workers are exposed, citable if it knew or should have known and failed to protect them.
- Correcting employer: the company responsible for installing or maintaining specific safety equipment, citable if it fails to exercise reasonable care.
- Controlling employer: the company with general supervisory authority over the site, typically the prime contractor, citable for failing to exercise reasonable care to prevent and detect violations across the site.
The controlling-employer designation is the one that catches prime contractors off guard. You don’t have to personally inspect every nail gun, but you do need a reasonable monitoring system. The subcontract should require compliance with all applicable OSHA standards and give you contractual authority to stop unsafe work, because OSHA will look at whether you had the power to correct a hazard regardless of what the contract says.9OSHA. Multi-Employer Citation Policy – CPL 2-0.124
Extra Rules If the Project Is Federally Funded
Davis-Bacon Prevailing Wages
Any federally funded or assisted construction contract over $2,000 triggers the Davis-Bacon Act, which requires contractors and subcontractors to pay laborers and mechanics no less than the locally prevailing wage for similar work in the area.10Office of the Law Revision Counsel. 40 U.S. Code 3142 – Rate of Wages for Laborers and Mechanics The prevailing wage includes both the basic hourly rate and fringe benefits. Subcontractors must submit a weekly certified payroll on Form WH-347, detailing each worker’s classification, hours, wage rate, and deductions.11U.S. Department of Labor. Instructions for Completing Davis-Bacon and Related Acts Weekly Certified Payroll Form, WH-347 For prime contracts exceeding $100,000, the Contract Work Hours and Safety Standards Act adds overtime at time-and-a-half for hours beyond 40 in a week.12U.S. Department of Labor. Davis-Bacon and Related Acts
Miller Act Payment Bonds
On federal construction contracts over $100,000, the prime contractor must furnish a payment bond protecting all subcontractors and material suppliers. The bond amount equals the total contract price unless the contracting officer sets a lower figure, but it can never be less than the performance bond.13Office of the Law Revision Counsel. 40 U.S. Code 3131 – Bonds of Contractors of Public Buildings or Works For contracts between $25,000 and $100,000, the Federal Acquisition Regulation provides alternative payment protections. If you’re the subcontractor, confirming a payment bond is in place before you start is one of the most important things you can do against nonpayment.
Invoicing, Lien Waivers, and Closeout
Process invoices on the schedule the contract specifies. With each progress payment, collect a conditional lien waiver from the subcontractor releasing their right to file a claim against the property for the amount being paid. These waivers protect the owner from paying twice for the same work and keep title clean. About a dozen states require specific statutory lien waiver forms, and using the wrong form in those states can invalidate the waiver entirely. Elsewhere, the language should be unambiguous about the amount waived and whether release is conditional on the check clearing.
At closeout, the final payment should come with an unconditional lien waiver covering all remaining amounts, along with warranty letters, as-built drawings, operation manuals, and anything else the contract requires. Once the subcontractor signs the final waiver and accepts the last payment (including released retainage), the right to file a lien is extinguished. Don’t release the final retainage until that paperwork is in hand.
Year-End Tax Reporting and Recordkeeping
For the 2026 tax year, you must file Form 1099-NEC for any subcontractor paid $2,000 or more during the calendar year. The threshold rose from $600 for payments made after December 31, 2025, and will adjust for inflation annually starting in 2027.14Internal Revenue Service. 2026 Publication 1099 The reporting rule comes from 26 U.S.C. § 6041A, which requires returns for remuneration paid for services when the aggregate hits the threshold set under § 6041(a).15Office of the Law Revision Counsel. 26 U.S. Code 6041A – Returns Regarding Payments of Remuneration for Services and Direct Sales
File the 1099-NEC by January 31 of the following year. Miss the deadline and penalties under IRC § 6721 start at $50 per form if you correct within 30 days, rise to $100 per form if corrected by August 1, and reach $250 or more per form after that, all adjusted upward annually for inflation. Intentional disregard carries a minimum penalty of $500 per form with no annual cap.16Office of the Law Revision Counsel. 26 U.S. Code 6721 – Failure to File Correct Information Returns
The IRS recommends keeping tax records for at least three years from the date you filed the return, which covers the standard statute of limitations. Employment tax records should be kept for at least four years. If you underreport income by more than 25%, the IRS has six years to audit, so holding records that long is the safer approach for any business with significant subcontractor spend.17Internal Revenue Service. How Long Should I Keep Records?