Uninsurable risk is a condition that poses unknowable or unacceptable risk of loss or a situation in which the insurance would be against the law. Insurance companies limit their losses by not taking on certain risks that are very likely to result in a loss.

In many cases catastrophes, such as earthquakes, have become uninsurable risks. a situation for which an insurance company will not provide insurance, because, for example, it is certain to happen: A person suffering from a terminal illness is considered to be an uninsurable risk.