How long is an inspection certificate valid in Maryland?

In Maryland, an inspection certificate is valid for a period of 90 days. This timeframe is established to ensure that vehicles maintain their proper operational standards and safety conditions, as safety and emissions regulations can change over time, needing regular reassessment. A 90-day validity period allows vehicle owners sufficient time to complete any necessary repairs while also ensuring the vehicle meets the state’s inspection requirements without imposing overly frequent inspections on drivers who maintain their vehicles well.