Quick Answer — Where Does a Home Energy Bill Actually Go?
Across a typical US household, heating and cooling account for about 52% of annual home energy use, water heating, lighting, and refrigeration together account for about 25% (the year-round baseline loads that run regardless of season), and the remaining 23% goes to other devices — cooking appliances, washers and dryers, and consumer electronics — per EIA's Residential Energy Consumption Survey (RECS).
A home energy audit's job is to find where your specific home deviates from an efficient baseline within that breakdown — air leaks, thin insulation, an aging furnace, inefficient lighting — and estimate what fixing each one is worth. The Department of Energy states that acting on a home energy audit's recommended upgrades typically saves 5-30% of a home's energy bill, with most homes landing somewhere in the 15-20% range depending on the home's age and current efficiency level.
This calculator applies that breakdown and savings range to your actual monthly electric and heating bills, so the dollar estimate is grounded in your real spend rather than a generic national average.