Financial research concept

Utility Purchased Power: Electricity Supplied by Third Parties

Utility purchased power measures electricity or capacity obtained from third parties rather than generated by company-owned plants, helping investors understand supply mix, contract exposure, and capacity planning.

By Lee BaileyPublished Sep 19, 2026
Research context

See what supports this page, how current it is, and where comparable or historical context is available.

Research date
Sep 19, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context
12 connected conceptsPart of the reviewed Regulated Utility Operating Model; issuer definitions remain distinct where disclosed.
Company examples
3 reviewed companiesRelationships reflect supported examples, not a normalized cross-company KPI ranking.

Utility purchased power is electricity, capacity, or related supply obtained from third parties rather than produced entirely by the utility's owned generating fleet.

It is a third-party supply measure, not a synonym for fuel cost or owned generation.

Utilities can buy energy, capacity, or both

Purchased power can come from:

  • long-term power-purchase agreements;
  • wholesale bilateral contracts;
  • regional market purchases;
  • jointly dispatched resources;
  • renewable contracts; and
  • short-term transactions used to balance system needs.

The accounting and operational treatment depends on the contract and market structure.

Purchased power can complement owned capacity

A utility may buy power because customer demand exceeds available owned generation, because a purchased resource is cheaper, because an owned plant is unavailable, or because regulators approved contracted resources instead of utility-owned construction.

That makes purchased power part of the bridge between Utility System Peak Demand and Utility Generation Capacity.

Cost recovery matters

For regulated utilities, purchased-power costs may be recovered through fuel or purchased-power clauses, base rates, riders, or other mechanisms.

That means higher purchased-power expense does not automatically translate into lower earnings dollar for dollar.

Fuel Adjustment Clause and regulatory timing remain important.

Primary-source examples

Utility purchased power is most useful as a third-party electricity-supply measure. Analyze it with owned capacity, peak demand, contract terms, market exposure, and regulatory recovery rather than treating it as a stand-alone cost-quality metric.

Part of the Regulated Utility Operating Model

Connect rate base, authorized returns, recovery mechanisms, regulatory lag, decoupling, weather normalization, customer growth, electricity demand, peak load, supply capacity, purchased power, and capital investment to understand regulated utility economics.

How the model fits together
  • Allowed earnings framework: Rate base multiplied by authorized return on equity is a useful regulatory earnings framework, but actual earned returns also depend on capital structure, expenses, recovery timing, and regulatory outcomes.
  • Recovery and volume exposure: Fuel adjustment clauses and revenue decoupling can reduce exposure to fuel-cost or sales-volume swings. Weather-normalized sales then help separate underlying load trends from temperature effects without becoming GAAP revenue.
  • Load, capacity, and capital requirements: Average retail customers and retail electric sales describe the size and energy demand of the served customer base, while system peak demand captures the maximum load the grid must be prepared to meet. Generation capacity and purchased power describe two ways the utility can supply that need, and the capital expenditure plan shows the infrastructure investment management expects to fund. These issuer-reported measures connect load growth with resource and capital needs rather than forming a standardized cross-company formula.

See It in Company Research

These companies are examples of how the concept is reported or discussed in public filings. Definitions can differ by issuer; these links open company research rather than a normalized metric comparison.

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