If someone gets drunk at my party, am I liable if they get into an accident?
Maybe. Most states have "social host liability" laws that allow a person injured by an intoxicated person, like the victim of a drunk driver, to sue the host who served the alcohol. In some cases, hosts may even be criminally prosecuted under serving intoxicated persons (SIP) laws. Not all states have social host liability laws and laws vary in the states that do.
Let's say Heather invites Damon over to her house for a wine and cheese party. Damon ignores the cheese in favor of glass after glass of his favorite rosé, which Heather continues to encourage long after it's clear that Damon has had a few too many. After a few hours, Heather says goodnight to Damon and walks him to his car. At an intersection, Damon blows through a red light and plows his car into Paul's car.
In every state, Paul would be able to file a car accident insurance claim and lawsuit against Damon over the accident. And in states with social host liability laws, Paul may also be able to sue Heather. But whether Heather is liable varies from state to state. In some states, Heather will only be liable if she somehow broke the law in providing alcohol to Damon (if he's under 21, for example.) Elsewhere, Heather may be liable if she continued to serve alcohol to Damon when she knew or should have known that he was intoxicated and about to drive.
What about Damon? Can Damon sue Heather if he's injured in the accident? Almost certainly not. Even in states that have fairly broad social host laws, hosts are not liable for injuries sustained by their drunken guests. Hosts are typically only liable for the harm their drunken guests cause to other people. One notable exception is when a host provides alcohol to a minor. In that situation, a minor who is injured in an alcohol-related accident may be able to file a lawsuit against the host even if the minor caused the accident.
If you plan to serve alcohol to guests, you can take steps to reduce your exposure as a host and keep everyone safe:
Learn more about Alcohol-Related Accidents and Injuries.