Michigan Supreme Court Redefines Child Custody Impact on Auto Insurance Claims

In a significant shift for auto insurance liability involving children of divorced parents, the Michigan Supreme Court has issued a ruling that fundamentally alters the framework for determining which insurer is responsible for covering injury claims. This decision, rendered on July 22, 2026, overturns a previous ruling from 2013 known as Grange, which had established a rigid approach based predominantly on custody orders. The implications of this ruling extend beyond legal circles, affecting families navigating custody arrangements and the insurance industry as a whole.

The case that sparked this judicial reconsideration began with a tragic incident on January 8, 2020, when a 15-year-old girl was severely injured in a car accident. As a passenger in her father's vehicle, driven by her brother, she was involved in a crash caused by icy conditions. The accident necessitated emergency back surgery, thrusting the family into a complex legal battle over insurance liability. With her parents divorced since 2011, the investigation into the child's living situation became central to determining which auto insurer would be responsible for her medical expenses.

The Previous Framework: The Grange Decision

Under Michigan's no-fault insurance system, the insurer responsible for covering Personal Injury Protection (PIP) benefits—such as medical costs after a crash—is typically the one associated with the household where the injured party is deemed to be