In almost every situation, no — you cannot be sued for not performing CPR on a stranger. American law does not impose a general duty to rescue, which means a private bystander who walks past a cardiac arrest, even a CPR-certified one, is not legally on the hook for staying out of it. The exceptions are narrow, and they turn on your relationship to the person, whether you caused the emergency, or whether you already started helping and then stopped.
No Legal Duty to Rescue a Stranger
American tort law draws a sharp line between causing harm and failing to prevent it. If a person collapses in front of you at a grocery store, you have no legally enforceable obligation to begin chest compressions, call 911, or do anything at all. This is true whether you are a bystander with no training, a CPR-certified office worker, a former lifeguard, or a retired paramedic on your day off. Courts will not impose civil liability simply because you could have helped and did not.1Legal Information Institute. Rescue Doctrine
Roughly a dozen states have chipped away at this rule with duty-to-assist or duty-to-report statutes, and they vary widely. Some require only that you call 911. Others apply only when you witness a specific type of crime involving a child or a sexual offense. A handful demand “reasonable assistance” to someone in grave physical danger. Penalties tend to be modest. In Minnesota, a violation is a misdemeanor with a fine of up to $300. None of these statutes require you to physically perform CPR, and none turn the choice not to act into grounds for a civil lawsuit brought by the victim or their family.
When You Actually Do Have a Duty to Act
The no-duty rule has real limits. Courts recognize a handful of situations where the relationship between two people, or the way the emergency began, creates an affirmative legal obligation to help.1Legal Information Institute. Rescue Doctrine
The first is a special relationship. A parent has a duty to a child. An employer has a duty to an employee injured on the job. A common carrier, such as an airline or bus company, has a duty to its passengers. If your toddler stops breathing at the park, the law treats your inaction very differently from a stranger’s.
The second is causing the danger in the first place. If your driving causes an accident that leaves someone unconscious, you have a legal duty to provide reasonable help, at minimum by calling emergency services. Walking away can expose you to both criminal charges and a civil lawsuit.
The third is voluntary assumption of care, and it deserves its own section because it catches people off guard.
What Happens If You Start CPR and Stop
Once you kneel down and begin performing CPR, you have voluntarily assumed a duty to that person. You cannot abandon them or leave them worse off than you found them. The obligation continues until emergency medical services arrive, the scene becomes too dangerous to remain in, or you are physically unable to continue.1Legal Information Institute. Rescue Doctrine
The law does not punish you for staying out of an emergency entirely. It does hold you accountable if you start helping and then quit without a good reason. A 1935 New York case made the point: shop owners who began caring for an ill customer, then left her alone for hours, were found liable for her death. If you are unwilling to commit to helping until professionals take over, the safer choice is to call 911 and wait rather than begin and walk away.
Protection If You Do Choose to Help
Fear of being sued cuts both ways. Many bystanders hesitate not because they are worried about the consequences of doing nothing, but because they are worried about the consequences of trying and making things worse. Every state and the District of Columbia has enacted a Good Samaritan law to address exactly that concern. The core protection is straightforward: if you provide emergency care in good faith and without expecting payment, you are shielded from civil liability for ordinary negligence.2National Center for Biotechnology Information. Good Samaritan Laws
Ordinary negligence means failing to act as a reasonably careful person would in similar circumstances. CPR in a parking lot will never look like CPR in a hospital, and Good Samaritan statutes account for that. Broken ribs are a well-known and expected side effect of chest compressions, and cracking a rib while trying to save someone’s life is the textbook example of an injury these laws were written to cover. Most statutes do not even require a current CPR certification. What matters is a genuine attempt to help.
The protection has a ceiling. Good Samaritan laws do not shield gross negligence or willful misconduct, which the law defines as a conscious, voluntary disregard for the need to use reasonable care. Poor CPR technique does not cross that line. Attempting an emergency tracheotomy with a pocket knife, or continuing to compress the chest of a conscious person who is telling you to stop, might.2National Center for Biotechnology Information. Good Samaritan Laws
Special Rules for Medical Professionals
The calculus shifts for doctors, nurses, and EMTs. When on duty and treating a patient, these professionals have a clear legal obligation to provide care, and failing to do so can result in malpractice liability and professional discipline.
Off duty is more nuanced. Technically, the no-duty-to-rescue rule applies to a physician at the beach the same way it applies to any other bystander. Professional ethics create their own pressure, though. The AMA’s Code of Medical Ethics states that physicians have an ethical obligation to provide care in medical emergencies, so declining to help can trigger professional discipline even if it does not trigger a lawsuit.3American Medical Association. Code of Medical Ethics – Patient-Physician Relationships
Good Samaritan laws still protect off-duty medical professionals who volunteer aid, but the standard of care they are measured against reflects their training. A broken rib from compressions is expected no matter who performs CPR. A physician who attempts a procedure a layperson would never try, and does it badly, will have their conduct assessed in light of what they were trained to know.
Workplace Designated Responders
Employers have their own set of requirements that can create a duty to act on the job. OSHA’s general industry standard requires that when no medical facility is close to the workplace, the employer must ensure someone on site is adequately trained to render first aid.4Occupational Safety and Health Administration. 1910.151 – Medical Services and First Aid
Certain designated employees at remote worksites, construction projects, and industrial facilities are trained precisely because their employer has to have someone available. The duty flows from their role and their job description, not from bystander law. If you are the designated first-aid provider at your workplace and someone goes into cardiac arrest, responding is part of your job.
How Often Bystanders Actually Get Sued
Lawsuits against bystanders who perform CPR are extraordinarily rare, and successful ones are close to nonexistent. Research examining legal cases connected to bystander CPR has found that the overwhelming majority of claims involve allegations that CPR was not provided or was delayed, not that it was performed and caused harm. The legal system, from state Good Samaritan statutes to federal immunity for AED use, is stacked in favor of people who try to help.
The greater legal exposure sits with professionals and designated responders who fail to act when they have a duty to do so. For everyone else, the honest answer to whether you can be sued for not performing CPR on a stranger is that you almost certainly cannot, and that the person most likely to face a lawsuit in a cardiac emergency is not the bystander who did nothing but the one who claimed a duty of care and then abandoned it.