Commercial energy is the energy consumed by businesses, institutions, and service-oriented buildings to power their daily operations. It covers everything from the electricity running the lights in an office tower to the natural gas heating a hospital. In the United States, the commercial sector consumed 9.34 quadrillion BTU of end-use energy in 2023, making it the smallest of the four main consumption sectors (behind transportation, industrial, and residential).
The term gets used in two slightly different ways. In energy policy and utility billing, “commercial energy” refers specifically to the energy purchased and used by non-residential, non-industrial buildings. In a broader economic sense, it can also mean any energy source that is bought and sold on the market (electricity, natural gas, gasoline) as opposed to traditional fuels like firewood or animal dung gathered for personal use. This article focuses on the first meaning, since that’s what most searchers need to understand.
What Counts as a Commercial Building
The U.S. Energy Information Administration classifies commercial buildings by their primary activity. The list is broader than most people expect. It includes offices, retail stores, enclosed and strip malls, restaurants, grocery stores, hotels, hospitals, outpatient clinics, schools, warehouses, churches, public assembly venues, and public safety buildings like police stations. If a building’s main purpose is commerce, services, education, or institutional functions, it falls into the commercial category.
What it does not include: factories and manufacturing plants (those are industrial), homes and apartments (residential), and power plants themselves (the electric power sector). A large warehouse storing goods for a retailer is commercial. A factory floor assembling those goods is industrial. The distinction matters because each sector faces different rate structures, efficiency standards, and regulatory requirements.
Where the Energy Goes
Space heating dominates commercial energy use, accounting for about 32% of total consumption. That makes sense when you consider the sheer square footage of offices, schools, and hospitals that need to stay warm through winter months. Ventilation and lighting each take roughly 10% of the total, with cooling, refrigeration, water heating, and computing filling out the rest.
Climate plays a major role in shifting those proportions. A commercial building in Minneapolis will spend far more on heating than one in Phoenix, which leans heavily on cooling instead. The national averages mask significant regional variation.
One fast-growing category is computing. Data centers housed in commercial buildings consumed an estimated 8% of commercial electricity in 2024. The EIA projects that share will reach 20% by 2050, potentially surpassing every other single end use including lighting and cooling. Data centers also create a cascading effect: they generate so much heat that they drive up ventilation and cooling demand in the same buildings. Healthcare facilities and large office buildings are the most likely to house data center rooms.
How Commercial Energy Is Priced
Commercial customers pay less per kilowatt-hour than residential customers but face a more complex bill. The average commercial electricity rate is about 13.63 cents per kWh, compared to 17.24 cents for residential customers. The lower rate reflects the economies of scale that come with higher, more predictable usage.
The real complexity comes from demand charges, which typically represent 30% to 70% of a commercial electric bill. While consumption charges measure how much total energy you use, demand charges measure your peak rate of use. The utility looks at the 15-minute window during the billing period when your building drew the most power, then charges a per-kilowatt fee for that peak. This structure exists because utilities must maintain enough generating and transmission capacity to meet those peak moments, even if that capacity sits idle the rest of the time.
The cost difference is dramatic. During a peak 15-minute demand interval, the effective price of electricity can spike to the equivalent of nearly $30 per kWh for the load that triggers the charge. That’s why energy managers focus not just on reducing total consumption but on flattening their usage patterns to avoid sharp spikes. Running a large piece of equipment at the same time the HVAC system kicks into high gear, for example, can create a peak that inflates the bill for the entire month.
Choosing an Energy Supplier
In 18 U.S. states, commercial customers can shop for their electricity supplier rather than defaulting to the local utility. The switching rates vary enormously. In Texas, 87% of commercial and industrial customers have chosen an alternative supplier. Ohio and Illinois follow at 65% and 60%, respectively. States like Virginia and Michigan sit below 10%.
In deregulated markets, the local utility still owns and maintains the power lines, but a separate company can supply the actual electricity. For businesses with predictable energy needs, competitive suppliers sometimes offer lower rates, fixed-price contracts, or renewable energy options. In regulated states, the utility handles both delivery and supply, and commercial customers have no choice of provider.
Efficiency Standards for Commercial Buildings
Commercial buildings in the U.S. are subject to energy efficiency standards rooted in ASHRAE Standard 90.1, which sets requirements for building insulation, HVAC systems, lighting, and other energy-consuming systems. The current version required for federal buildings is Standard 90.1-2019, and federal law requires new federal buildings to be designed at least 30% more efficient than that baseline when it’s cost-effective over the building’s lifetime.
The trajectory is aggressive for government-owned buildings. Federal new construction and major renovations starting in fiscal year 2025 must reduce on-site fossil fuel energy consumption by 90% compared to a similar building from 2003. By 2030, the target becomes 100%, effectively requiring new federal buildings to eliminate fossil fuel use on site. While these rules apply directly to federal buildings, they tend to influence broader commercial construction practices and state-level building codes over time.
Solar and Renewable Energy in the Commercial Sector
Commercial rooftop solar has moved well past the early-adopter phase. Installation costs continue to drop thanks to lower module prices, more efficient power conversion, and reduced labor and materials costs. U.S. distributed solar capacity (covering both commercial and residential systems) is projected to grow 222% between 2024 and 2035, from 41 gigawatts to 131 gigawatts.
One technology driving this growth is bifacial solar panels, which capture sunlight on both sides of the module. These panels are expected to grow from 10% of the global market to over 60% by 2032. In real-world conditions, they produce about 5% to 15% more energy than traditional single-sided panels, depending on the installation setup. For commercial buildings with large flat roofs or parking structures, the energy gains add up quickly, and the savings compound when they help shave peak demand during sunny afternoon hours.