The same amount of electricity costs very different amounts in different American states. The variation reflects how power is produced, moved and regulated rather than any single national price.
Generation mix sets the base cost
States relying on inexpensive local fuel, abundant hydropower or long-established nuclear capacity produce power at a lower marginal cost than those importing fuel.
Renewable generation has very low running costs once built, but the capital is recovered through rates over decades, so the effect on bills depends on where a state is in that cycle.
Because generation assets last for decades, the mix reflects decisions taken long ago and changes slowly regardless of current conditions.
Transmission and geography add cost
Moving power over long distances requires substantial infrastructure and incurs losses along the way, both of which are recovered from customers.
Sparsely populated areas have more line per customer, so the fixed cost of the network is spread across fewer bills.
Weather exposure matters too, since regions facing hurricanes, ice storms or wildfire risk carry higher maintenance and hardening costs.
Regulatory structure changes who bears risk
In traditionally regulated states, a vertically integrated utility owns generation and wires together and recovers its approved costs through rates set by a public commission.
In restructured states, generation is opened to competition and customers may choose a supplier, while the delivery network remains a regulated monopoly.
The two structures allocate risk differently between shareholders and customers, and that allocation shows up in both the level and the volatility of prices.
Rate design shifts cost between customers
Bills combine a fixed charge with volumetric charges, and the balance between them determines how much a low-usage household pays relative to a high-usage one.
Time-of-use pricing, demand charges and tiered rates each redistribute cost according to when and how power is consumed.
Industrial customers typically pay less per unit because they draw steady, high-voltage power that is cheaper to serve, and that difference is built into approved tariffs.
Policy costs are recovered through the bill
Efficiency programmes, low-income assistance, storm recovery and stranded asset costs from earlier investments are frequently collected as separate line items on customer bills.
These are policy choices made at state level rather than nationally, so their presence and their size vary from one state to the next.
Comparing headline rates between states therefore compares different bundles of service and policy, not simply the cost of producing power.