What age do teens start to sneak out?

There's no single age at which teens start sneaking out. It depends on a variety of factors, including individual maturity level, peer influence, family dynamics, and the specific rules within a household. Some teens might start experimenting with sneaking out as early as 13 or 14, while others may never do it. It's more accurate to say it's a behavior that can emerge at any point during the teenage years.