A non-delegable duty is a legal obligation the law treats as personally yours, so hiring an independent contractor to carry it out does not move the liability off your shoulders. If the contractor’s work produces the harm the duty was meant to prevent, you can be sued directly, even when the contractor was the one who made the mistake. Courts apply this in a handful of recurring situations: dangerous work, safety obligations imposed by statute or regulation, property open to the public, and healthcare delivered through contracted physicians. In each one, “I hired a professional” is not a defense.
The Default Rule, and Why It Has Exceptions
Ordinarily, if you hire an independent contractor and that contractor injures someone, you owe the injured person nothing. The reasoning is about control. A traditional employer directs how work gets done and so answers for mistakes through respondeat superior; an independent contractor sets their own methods, and the hiring party stays out of the details and out of the lawsuit.
That default creates a problem. A contractor without assets or adequate insurance leaves an injured third party with no meaningful recovery, even when the harm was serious and the hiring party clearly benefited from the work. The non-delegable duty doctrine is the law’s response. For a defined set of obligations, courts refuse to let the hiring party pass the risk down the chain.
Non-Delegable Duty Is Not Vicarious Liability
The two concepts get mixed up constantly, and the difference changes how a case is defended. Vicarious liability is derivative: your employee was negligent, so you pay. A non-delegable duty is direct. The law places the obligation on you, and you are liable because the duty was not fulfilled, not because the contractor was blameworthy in some technical sense.
Practically, that shifts the focus of the case. With vicarious liability, the fight is over the worker’s conduct. With a non-delegable duty, the fight is over whether the required safety outcome was achieved. You can hire the most reputable contractor in the industry, paper the contract with safety clauses, and still lose if the harm the duty guards against actually occurs.
Dangerous and Inherently Risky Work
One of the broadest categories involves work that carries a recognized danger beyond ordinary job-site risk. The Restatement (Second) of Torts draws two related lines. Section 416 covers work involving a “peculiar risk” — a danger that differs from everyday hazards and demands special precautions. Section 427 covers work that is “inherently dangerous,” where the risk is a normal feature of the activity itself.
The distinction is subtle. A peculiar risk exists during the work and can be eliminated with proper precautions. Inherent dangers are baked in; precautions reduce them but cannot remove them. Blasting near occupied buildings, high-voltage electrical work, and deep excavations next to existing structures are classic examples. If you hire out this kind of work and the contractor skips safety steps, you share the liability because you set the activity in motion knowing those dangers came with it.
A third tier under Section 427A covers abnormally dangerous activities, where even the best precautions cannot eliminate the risk of serious harm. These can trigger strict liability — fault doesn’t matter, and the hiring party answers for the harm simply because the activity caused it.
The Collateral Negligence Limit
Not every careless act by a contractor on a dangerous job sticks to the hiring party. Courts recognize “collateral negligence,” which protects the principal when the contractor’s mistake is incidental to the contracted work rather than a direct consequence of it. A demolition contractor who fails to shore up an adjacent wall creates liability that reaches the hiring party, because that risk is inseparable from demolition. The same contractor who backs a truck into a pedestrian in the parking lot has committed collateral negligence, and the hiring party generally is not responsible.
The test is whether the negligent act falls within the scope of the danger that made the work hazardous. Courts ask whether the harm was a direct or probable consequence of the work contracted for, or merely incidental to it. The same physical act can land on either side of the line depending on what the hiring party actually engaged the contractor to do, which is why these cases turn heavily on their facts.
Duties Imposed by Statute or Regulation
When a law places a specific safety obligation on you, hiring a contractor does not move that obligation. Section 424 of the Restatement (Second) of Torts captures the rule: if a statute or regulation requires you to provide particular safeguards, you remain liable for injuries caused by your contractor’s failure to implement them.1Toxic Docs. Restatement (Second) of Torts Section 424 The question is whether the regulation names you as the responsible party. If it does, no contract moves the target.
Trucking is a clean illustration. Federal rules require every motor carrier to systematically inspect, repair, and maintain all vehicles under its control.2eCFR. 49 CFR 396.3 – Inspection, Repair, and Maintenance A carrier that hires an independent mechanic cannot shift the blame to that mechanic when faulty brake work causes a crash. The regulation puts the duty on the carrier.
Building codes operate the same way. A developer required by code to ensure structural safety cannot deflect to the subcontractor who ignored load-bearing requirements. Whether any given regulation creates a non-delegable duty depends on who the law is addressed to and whether the obligation concerns a permanent condition of the property or a transient task.
Landowners and Property Open to the Public
Property owners who invite the public onto their premises carry a non-delegable duty to keep those spaces reasonably safe. Under Section 422 of the Restatement (Second), an owner who hires a contractor for construction, repair, or maintenance remains liable when that work creates a dangerous condition that injures a visitor. The standard is measured by what a reasonable landowner would do, not by what a careful contractor would do.3Justia. Ft. Lowell-NSS Ltd. Partnership v. Kelly
A shopping center cannot dodge a slip-and-fall suit by pointing at the janitorial company. A hotel stays responsible when its elevator maintenance contractor leaves equipment in a dangerous state. Visitors enter based on a relationship with the owner, not with the contractor they never met and could not evaluate. The duty reaches most contracted work on the premises — renovations, security, landscaping, routine maintenance. A contract that puts safety responsibilities on the contractor does not change the owner’s position as to the injured visitor.
Hospitals and Contracted Physicians
Hospitals present one of the highest-stakes applications of the doctrine. Emergency physicians, anesthesiologists, and various specialists often work as independent contractors rather than hospital employees, a fact patients rarely know and have no way to control.
In a 2023 Washington Supreme Court decision, the court held that hospital licensing regulations setting minimum standards for safe and adequate care create a non-delegable duty that applies whether the physician is an employee or an independent contractor. The hospital can delegate performance of medical care to a non-employee doctor; it cannot delegate the duty itself or the liability for failing to meet it. The reasoning mirrors the other categories: the regulations target the hospital, patients deal with the hospital rather than selecting individual contractors, and letting hospitals insulate themselves through contractor arrangements would gut the protective purpose of healthcare licensing.
Negligent Selection of the Contractor
Even where no non-delegable duty applies, you can still be liable for choosing the wrong contractor. Under Section 411 of the Restatement (Second), a hiring party is liable for selecting an incompetent contractor when the work carries a risk of physical harm that requires skill and care to avoid.
Courts weigh several factors in these claims:
- How much risk the work poses to third parties if done poorly.
- Whether the task requires specialized training or could be handled safely by anyone competent.
- The contractor’s reputation and track record, including safety violations or performance problems you knew or should have found.
- Whether the contractor held required licenses and had adequate equipment, keeping in mind that a license alone may not establish competence for the specific work.
This theory does not depend on any non-delegable duty. It rests on your own negligence in picking the contractor. A single prior mistake usually does not prove incompetence, and the plaintiff still has to connect the inadequacy you missed to the harm that occurred — general sloppiness is not enough if the injury came from an unrelated error.
OSHA and the Controlling Employer
Federal workplace safety rules create a parallel route to liability on multi-contractor worksites. OSHA’s multi-employer citation policy allows the agency to cite the “controlling employer” — the entity with general supervisory authority over the site — along with the contractor whose employees face the hazard.4Occupational Safety and Health Administration. Multi-Employer Citation Policy (CPL 02-00-124)
Control can come from the contract (a clause requiring subcontractors to follow safety protocols) or from the practical reality of how the site runs. General contractors are the most common controlling employers, but a property owner with broad oversight can qualify. The standard is “reasonable care,” judged against the project’s scale, how quickly hazards change, the contractor’s known safety history, whether the controlling employer inspected periodically, and whether compliance was enforced through graduated consequences. You are not expected to match the contractor’s trade expertise or inspection frequency, but you cannot look away.
OSHA can also cite a “creating employer” — a company that causes a hazardous condition, even if only another employer’s workers are exposed. One company can wear both labels on the same site.
What Contracts and Insurance Actually Do
Because a non-delegable duty cannot be contracted away as to the injured third party, the goal of contractual protection shifts. You cannot stop the lawsuit from reaching you, but you can arrange for the contractor to carry the financial consequences after judgment or settlement.
Indemnification
An indemnification clause requires the contractor to reimburse you for costs arising from their negligence. Courts generally enforce these clauses, with a significant catch: if you were actively negligent yourself, rather than merely failing to catch the contractor’s error, the clause may not protect you. The split between “active” and “passive” negligence drives most of these disputes. An owner whose only fault was failing to supervise is in a far stronger position to enforce indemnity than one who directed the contractor to cut corners.
Additional Insured Status
Requiring the contractor to carry commercial general liability insurance and name you as an additional insured usually provides more reliable protection than indemnification alone. The endorsement extends the contractor’s policy to cover you for liability arising from the contractor’s work, with separate forms addressing injuries during the work and injuries after completion.
Two things trip people up. The endorsement does not raise the policy limits; you and the contractor share the same cap. And the coverage only reaches liability connected to the contractor’s work for you, not a general extension of their policy. Requiring the endorsement to be “primary and non-contributory” ensures the contractor’s insurance pays first and your own carrier is not pulled in until those limits are gone.
The quiet failure point is verification. A certificate of insurance issued at the start of a project can lapse before the project ends, and most hiring parties never check again. Building a verification step into project management closes one of the most common gaps in contractor risk programs and costs almost nothing to run.