A contractor signs directly with the property owner and is responsible for delivering the entire project; a subcontractor is a separate business the contractor hires to handle one specialized slice of that work. That single difference in who signs what drives everything else in the contractor vs. subcontractor comparison: who the owner can sue, who pays whom, who carries insurance, who files which tax form, and who gets cited when an inspector shows up.
Who Answers to the Owner
The structure rests on privity of contract. Only the parties who sign an agreement can enforce its terms against each other. The prime contract links the owner to the general contractor at the top of the chain. Subcontracts branch off below, each one linking the general contractor to a specialty firm. The owner and the subcontractor usually have no direct contractual relationship at all.
That means the general contractor is the single entity the owner can hold accountable for the finished project. If a tile installer’s work is defective, the owner’s claim runs through the general contractor, who then pursues the tile sub under their separate agreement. One contract, one point of accountability.
Most subcontracts carry flow-down clauses that mirror the general contractor’s obligations to the owner into the subcontract. The sub is bound by the same quality standards, insurance requirements, and deadlines the GC accepted upstream. Expectations stay consistent at every tier.
Who Does What on Site
The general contractor runs the project at the macro level: pulling permits, coordinating inspections, and sequencing each trade so the work handoffs actually line up. Before letting any subcontractor on-site, the GC is expected to verify that firm’s licensing, bonding, and insurance, including commercial general liability, auto liability where relevant, and workers’ compensation. A general contractor who skips that review can end up absorbing an uninsured sub’s liability.
Subcontractors bring the specialized skill the general contractor doesn’t keep in-house. An electrical sub handles wiring and panels. An HVAC sub designs and installs climate systems. A masonry sub lays brick and block. Each firm’s scope is defined by its subcontract, which spells out the tasks, standards, and deadlines.
Direction flows through the general contractor, not around it. If the owner wants to change the electrical scope, that request goes to the GC, who issues a change order to the electrical sub. This keeps the chain of command clean and stops conflicting instructions from reaching the crew doing the work.
Who Is Liable When Something Goes Wrong
Safety liability isn’t a hot potato that lands on one party. Under OSHA’s construction standards, the prime contractor “assumes all obligations prescribed as employer obligations” for all work performed under the contract, “whether or not he subcontracts any part of the work.”1Occupational Safety and Health Administration. 1926.16 – Rules of Construction That obligation never leaves the GC, even when a sub is controlling the immediate task.
At the same time, subcontractors are on the hook for their own crews. To the extent a subcontractor agrees to perform any part of the contract, it “assumes responsibility for complying with the standards in this part with respect to that part,” and both the prime contractor and subcontractor are “deemed to have joint responsibility.”1Occupational Safety and Health Administration. 1926.16 – Rules of Construction
OSHA’s multi-employer citation policy backs this up on enforcement. The agency can cite any employer whose workers are exposed to a hazard, any employer who created the hazard, and any employer who controls the site or has authority to correct the condition.2Occupational Safety and Health Administration. CPL 2-0.124 Multi-Employer Citation Policy A sub whose crew is working at heights without fall protection can be cited even if the general contractor supplied the scaffolding.
Indemnification and Insurance
Most subcontracts include an indemnification clause requiring the subcontractor to defend and reimburse the general contractor for injuries or property damage tied to the sub’s work. These clauses come in different strengths. A limited form covers only what the sub actually caused. An intermediate form triggers whenever the sub is even partially at fault. A broad form makes the sub liable regardless of fault, and roughly 45 states have anti-indemnity statutes that void broad-form clauses as against public policy.
Insurance backs the promise up. Subs typically carry commercial general liability, workers’ compensation, and sometimes professional liability if the work involves design. The GC reviews certificates of insurance before the sub sets foot on-site. If coverage lapses mid-project, the general contractor may have to cover the gap and back-charge the added premium to the sub.
How the Money Moves
Payment follows the contract chain. The owner pays the general contractor in progress installments tied to milestones. The general contractor then pays each subcontractor under their individual subcontract. Subs have no direct payment relationship with the owner.
That layering creates real risk for subcontractors, and two clauses decide how much of it they carry. A pay-when-paid clause treats the owner’s payment to the GC as a timing device: the sub still gets paid, just on a delay. A pay-if-paid clause is different. It makes the owner’s payment a condition precedent, so if the owner never pays the general contractor, the sub may never get paid at all. Many states refuse to enforce pay-if-paid clauses on public-policy grounds, but where they are enforceable, they push the entire risk of owner default down to the sub.
Mechanic’s Liens
Every state gives unpaid subcontractors and suppliers some form of mechanic’s lien. A lien attaches to the property’s title and can block the owner from selling or refinancing until the debt is cleared. In some states an unresolved lien can force a sale of the property.
Filing deadlines and preliminary-notice rules vary by state, with most requiring filing within 60 days to one year after the last work was performed. Owners protect themselves by collecting lien waivers from subcontractors before releasing each progress payment. Skip that step and the owner can pay the GC in full only to find that a subcontractor still holds an unpaid claim against the property.
Prompt Payment on Federal Jobs
On federal construction contracts, the Prompt Payment Act imposes a hard deadline. Once the general contractor is paid by the government, it has seven days to pay its subcontractors for satisfactory work.3eCFR. 48 CFR 52.232-27 – Prompt Payment for Construction Contracts Many states have similar prompt-payment statutes for private projects.
Tax Treatment on Each Side
Subcontractors are treated as independent businesses for tax purposes, not as employees of the general contractor. Starting with tax year 2026, a general contractor that pays a subcontractor $2,000 or more during the year must report the payment on Form 1099-NEC.4Internal Revenue Service. 2026 Publication 1099 The threshold jumped from the previous $600 floor and will adjust for inflation beginning in 2027.5Internal Revenue Service. Forms and Associated Taxes for Independent Contractors
Because subcontractors aren’t employees, they handle their own tax obligations. That includes self-employment tax at a combined 15.3%, which covers both the employer and employee shares of Social Security (12.4%) and Medicare (2.9%).6Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) A W-2 employee at a company would pay half that rate, with the employer covering the other half. This is one of the biggest financial gaps between the two statuses, and it’s why subcontractors typically charge higher hourly rates than comparable employees.
The property owner benefits from this arrangement, with no payroll tax liability, no withholding obligation, and no responsibility for the sub’s benefits. That only holds, though, if the subcontractor genuinely operates as an independent business.
When a “Subcontractor” Is Really an Employee
Calling someone a “subcontractor” on paper doesn’t make them one. Both the IRS and the Department of Labor look past the label to the actual working relationship, and getting the classification wrong triggers back taxes, penalties, and enforcement actions that can dwarf any payroll savings.
The IRS Three-Factor Test
The IRS looks at three categories to decide whether a worker is an employee or an independent contractor:7Internal Revenue Service. Worker Classification 101: Employee or Independent Contractor
- Behavioral control. Does the business dictate how, when, and where the work happens? An independent subcontractor picks its own methods and schedule. Telling a worker exactly how to install each fixture and requiring them on-site 7 to 4 looks like employment.
- Financial control. Does the worker invest in tools and equipment, take on other clients, and stand to profit or lose based on their own decisions? Subcontractors typically supply their own materials and carry their own insurance.
- Relationship of the parties. Are there employee-style benefits like health insurance or a pension? Is the engagement tied to a defined project, or has it run open-ended for years? A sub hired for one scope looks different from someone who has worked for the same contractor year-round for five years.
If either party is unsure, either the business or the worker can file IRS Form SS-8 to request a formal determination.8Internal Revenue Service. About Form SS-8, Determination of Worker Status
The DOL Economic Reality Test
The Department of Labor applies a separate test under the Fair Labor Standards Act. A February 2026 proposed rule identified two core factors: the degree of control the business has over the work, and the worker’s opportunity for profit or loss based on their own initiative and investment.9U.S. Department of Labor. Notice of Proposed Rule: Employee or Independent Contractor Status Under the Fair Labor Standards Act When those two point in different directions, the DOL weighs additional considerations: the skill required, the permanence of the relationship, and whether the work is part of an integrated production process. Actual working conditions carry more weight than the contract language.
What Misclassification Costs
An employer that should have treated a worker as an employee but issued 1099s instead owes back employment taxes. Under Section 3509 of the Internal Revenue Code, the liability is calculated at reduced rates when the employer at least filed the required 1099 forms: 1.5% of wages for income tax withholding and 20% of the normal employee share of FICA.10Office of the Law Revision Counsel. 26 USC 3509 – Determination of Employers Liability for Certain Employment Taxes If no 1099s were filed either, those rates double to 3% and 40%. Penalties and interest ride on top of that, and state workforce agencies can pile on separately for unpaid unemployment insurance and workers’ compensation premiums. A crew of ten workers misclassified for a year can generate a six-figure liability once federal taxes, state assessments, and penalties are added up.
Extra Rules on Federally Funded Jobs
Federally funded construction adds wage and reporting requirements under the Davis-Bacon Act. The law applies to contracts exceeding $2,000 for construction or repair of public buildings and public works, and it requires all laborers and mechanics to be paid no less than the locally prevailing wage and fringe benefits set by the Department of Labor.11U.S. Department of Labor. Davis-Bacon and Related Acts Prevailing wages often run above local market rates.
For prime contracts exceeding $100,000, the Contract Work Hours and Safety Standards Act adds an overtime obligation: time-and-a-half for all hours worked beyond 40 in a week.11U.S. Department of Labor. Davis-Bacon and Related Acts Both obligations apply to subcontractors at every tier, not just the prime. A subcontractor on a federal highway project must pay the same prevailing wages as the general contractor, and both must submit certified payroll records. Violations can result in contract termination and debarment from future government work.