The short answer
Transmission is the high-voltage long-distance grid (115-765 kV) that moves bulk power between regions. Distribution is the local low-voltage grid (4-35 kV stepped down to 240V) that delivers to homes. Bills show separate charges for each — transmission goes to the regional grid operator (PJM, ERCOT), distribution to your local utility.
The US electric grid is two layers: high-voltage transmission (the highways that move power across states) and lower-voltage distribution (the local streets that deliver power to homes and businesses). Both show up on your bill as separate charges. Transmission charges go to the regional grid operator (PJM, ERCOT, etc.); distribution charges go to your local utility (Duke, ConEd, ComEd, Oncor, etc.). Together they're 30-55% of a typical bill.
Transmission grid
Voltages: 115 kV, 138 kV, 230 kV, 345 kV, 500 kV, 765 kV. Higher voltage = lower line losses over long distances.
Operators: regional ISOs/RTOs (PJM, ERCOT, NYISO, ISO-NE, MISO, CAISO, SPP) plus federal areas (Bonneville Power, TVA). Transmission owners (utilities + independent transmission companies) build and maintain lines; ISO/RTO dispatches.
Transmission charges on bills are usually $0.005-$0.020/kWh for residential, similar for commercial. They fund line maintenance, congestion costs, and FERC-regulated returns to transmission owners.
Distribution grid
Voltages: 4 kV, 13.8 kV, 25 kV, 35 kV stepped down at substations to 7.2 kV neighborhood feeders, finally to 240V/120V at the pole transformer outside your home.
Operators: your local regulated utility (Duke, ConEd, ComEd, Oncor, PG&E, Eversource, etc.). Even in deregulated states, distribution remains a regulated monopoly — only generation/supply was deregulated.
Distribution charges on bills are typically $0.030-$0.080/kWh residential, $0.020-$0.060/kWh commercial. They fund local poles, wires, transformers, meter reading, billing, and emergency response.
How transmission and distribution show on your bill
Most US bills separate "supply" (generation plus transmission) from "delivery" (distribution plus ancillary services). Some utilities further break out transmission as its own line; others bundle it with supply. Either way, the total is the same — the line-item naming convention varies by utility but the underlying cost components do not.
In deregulated states, switching suppliers changes the supply portion only (generation, sometimes including transmission). Distribution stays with your local utility regardless of supplier choice. The how-to-read-your-electricity-bill guide breaks down every line by category.
Transmission and distribution charges generally rise 1 to 3 percent per year because they are FERC and PUC-regulated based on utility cost-of-service filings, with regulated returns on equity (typically 9 to 11 percent). The trend has accelerated in recent years because of grid-hardening investments, renewable interconnection costs, and capacity-market dynamics in PJM.
For households on solar with net metering, transmission and distribution charges still apply to the kWh you import from the grid, even if you export equal kWh back. Net metering reduces the supply portion to zero on a balanced solar home but does not eliminate the transmission or distribution charges on the import-side kWh. The net-metering-explained-state-rules guide covers state-by-state policy.
Infographic
Bill component flow — generation, transmission, distribution
Why transmission and distribution costs are rising
Aging infrastructure: most US transmission lines are 50 to 70 years old and are reaching end-of-design-life. Replacement costs $1 to $5 million per mile depending on terrain and voltage class. Several thousand miles of US transmission needs replacement over the next two decades.
Renewable interconnection: connecting new wind and solar farms to load centers requires new long-distance transmission. Texas, the upper Midwest, and the Plains states have hundreds of GW of new generation projects in interconnection queues; connecting them requires multi-billion-dollar transmission expansions.
Grid hardening: storm response, undergrounding lines in fire-prone areas, and weatherization investments after extreme events (Texas freeze 2021, Northeast hurricanes, California wildfires) have collectively added 0.5 to 1.5 cents per kWh to delivery rates over the past 5 years in affected territories.
Capacity-market dynamics: PJM customers (Mid-Atlantic, Ohio Valley) are seeing 8 to 15 percent rate increases in 2025-2026 because of record-high capacity-auction clears. The capacity-market-pjm-ercot-explained guide walks the underlying mechanics.
How customers can reduce transmission and distribution costs
Direct reduction: not really possible, since transmission and distribution rates are PUC-set and apply uniformly to all customers in a class. Switching suppliers, switching utilities, or filing disputes do not change these line items.
Indirect reduction: lowering kWh consumption reduces the dollar amount of transmission and distribution paid, since both are typically billed per kWh. A 15 percent reduction in usage cuts both transmission and distribution dollars by 15 percent. The how-to-lower-your-electric-bill guide covers the practical efficiency moves.
Solar with net metering: in states with full net metering, exporting kWh back to the grid offsets the import-kWh that transmission and distribution charges multiply against. A net-zero home (annual production equals annual consumption) can effectively eliminate the supply portion but still pays transmission and distribution on each direction of flow.
Time-of-use rate plans: some utilities offer TOU rate structures that price transmission and distribution differently by time of day. Off-peak transmission rates can be 30 to 50 percent below peak rates. Effective for households that can shift load to off-peak hours through smart thermostats and timers.
Recap
Bottom line
The US electric grid is two layers: high-voltage transmission for moving bulk power across states, and lower-voltage distribution for delivering power locally. Both appear on your bill as separate charges, both are regulated (FERC for transmission, state PUC for distribution), and together they typically account for 30 to 55 percent of a residential electricity bill. Neither is changeable through supplier shopping — they stay with your local utility regardless of which supplier provides the supply portion.
For households trying to reduce total bill cost, the lever is kWh consumption rather than the per-kWh transmission or distribution rate. Energy efficiency, solar with net metering (in compatible states), and time-of-use rate plans all reduce the kWh denominator that these charges multiply against. The how-to-read-your-electricity-bill guide breaks down which lines are which, and the how-to-lower-your-electric-bill guide covers the practical efficiency moves.
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