The short answer
A US commercial energy bill has 15-25 line items: energy charge (kWh × rate, 40-50% of bill), demand charge ($/kW peak, 20-30%), capacity reservation (3-8%), distribution (5-10%), transmission (3-7%), ancillary services (1-3%), riders (2-5%), customer charge ($30-200/mo), sales tax (4-7%). Energy line is shoppable in deregulated states; rest is regulated.
A US commercial energy bill has 15-25 line items, most of which are jargon. Understanding each line is the prerequisite for procurement, audit, and dispute. This guide is a complete glossary of every line that appears on a typical commercial electricity or gas bill — energy charge, demand charge, capacity reservation, T&D, riders, ancillary services, ratchet clauses — explained in plain English.
Energy side — kWh × rate
Energy charge: the kWh consumed × per-kWh supply rate. Largest single line on most commercial bills, typically 40-50% of the total. In deregulated states, this is the line you can shop.
Time-of-use (TOU) energy: some commercial tariffs split the energy charge by time-of-day. Peak-hour kWh × peak rate + off-peak kWh × off-peak rate.
Bundled supply: in single-bill states, the supplier charge appears as a separate line; the utility bills it on the supplier behalf.
Demand side — $/kW peak
Demand charge: the highest 15-minute kW peak in the billing month × $/kW tariff rate. Typically 20-30% of a commercial bill. The demand-charge-strategy guide covers reduction tactics.
Ratchet clauses: many commercial tariffs apply a "ratchet" — if your peak demand exceeds X% of your max recent peak, the ratchet locks in the higher demand charge for 11-12 months.
Capacity tag (PJM-only): your account contribution to PJM regional system peak. Set annually based on previous summer 5-peak average. The capacity-tag-management-pjm-ercot guide walks tag reduction.
Delivery side — wires + everything else
Distribution charge: 5-10% of bill. Transmission charge: 3-7%. Capacity reservation: 3-8%. Ancillary services: 1-3%.
Riders: state-mandated pass-throughs for renewable portfolio standards, low-income assistance funds, energy efficiency programs. Typically 2-5% of bill.
Customer charge: flat monthly fee, $30-$200/month. Sales tax: 4-7% on the energy + delivery sub-total.
Infographic
Commercial bill decomposition
Recap
Bottom line
A US commercial energy bill has 15 to 25 line items, each measuring a specific cost component or regulatory pass-through. Energy charge (kWh times rate) and demand charge ($/kW peak) together account for 70 to 80 percent of a typical commercial bill. Capacity, T&D, ancillary services, riders, customer charge, and tax fill out the rest.
For commercial operators, decoding every line is the prerequisite for procurement, audit, and dispute. The commercial-energy-bill-audit-walkthrough guide walks the audit workflow; the capacity-tag-management-pjm-ercot guide covers the operational lever for demand-heavy facilities; the demand-charge-strategy guide covers the operational moves on the demand-charge component specifically.
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