Indiana Michigan Power Announces Electric Bill Decrease for Indiana Customers June 1st05/27/2026If you’re an Indiana Michigan Power customer and live in Indiana, your electric bill will be lower starting in the June billing cycle. I&M said for the average customer using 1,000 kilowatt hours (kWh) per month will be a 3.6%, or roughly $6, decrease in their bill. The lower rate is partly due to I&M’s additional revenue expected from selling extra power in 2026.