MADISON, Wis. (WMTV) – A tax for charging electric vehicles starts on January 1, 2025 in Wisconsin. The Wisconsin Department of Revenue says an excise tax of 3 cents per kilowatt-hour will be due on the electricity delivered or placed into the battery or other energy storage device of an EV by a Level 3 charter, or a Level 1 or Level 2 charger installed after March 22, 2024 of an EV charging station, as stipulated by 2023 Wisconsin Act 121.