Congestion charging is a system used to reduce traffic in busy city centres, and it mainly affects expats living in or travelling to London in the United Kingdom. For expats, the congestion charge means paying a daily fee if you drive a vehicle within a designated zone during certain hours. Expats in the UK should know that the charge applies regardless of where the car is registered and is in addition to other costs such as parking, fuel, and insurance. The scheme is designed to discourage unnecessary driving, reduce pollution, and improve public transport efficiency. Some vehicles, such as electric cars, may qualify for discounts or exemptions, although these rules change over time. Expats in the UK who commute by car should check whether their route enters the congestion charging zone and factor the cost into daily expenses. Many expats choose public transport to avoid congestion charges altogether.