According to the yellow tag inside it says $45 a year. However I had it plugged in 2 to 3 weeks set on eco mode and auto fan to try to help keep our upstairs a little cooler. I got my electric bill and it was about $100 more than usual. So the insert is not accurate. It does NOT have auto shut off so the fan always runs. I wish I would have gone with a different unit from another retailer I was also looking at.