Electricity Supplier Comparison in Spain

Use the official CNMC energy-offer comparator and WattCostLab to compare Spanish electricity plans by annual cost, price type, services and renewable conditions.

Important: WattCostLab searches the selected public or official source automatically. When live offer fields can be normalized safely, results are ranked by estimated annual cost. If an authority does not expose reusable offer data, WattCostLab shows the official comparison link instead of guessing prices.

Spain requires more than a headline energy rate

Enter the location information requested below and your annual electricity use. WattCostLab checks the relevant public or official source automatically and calculates comparable annual costs when the published fields can be normalized safely. If a live feed is not reusable, use the official link shown by the comparator; no manual offer import is required.

Use CNMC as the live source of truth

WattCostLab does not scrape the CNMC comparator. Use the official result set, enter or convert the offers you want to compare into a common annual-cost basis, and use the interactive chart to see the difference between plans.

Open official comparator/source ↗ Regulator / official guidance ↗

Home / Compare electricity suppliers

OFFICIAL MARKET SOURCES · AUTOMATIC COMPARISON · NO PAID RANKING

Electricity Supplier & Tariff Comparator

Compare electricity supply offers by annual cost, effective cost per kWh, contract term, exit fee and renewable content. Use official market sources and verify the final contract before switching.

Annual electricity use (kWh/year)

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Supplier prices

Comparable supplier offers found automatically from public/official sources when machine-readable data is available.

Choose your location and compare suppliers.

Estimated annual costs use the published offer rate and recurring fees when those fields are available. Final eligibility, taxes, network charges and contract terms must be confirmed on the official comparator or supplier website.

Important comparison notes

Compare like with like. A supply-only offer should not be compared directly with an all-in bill unless you normalize both to the same cost basis.
Network and taxes can remain outside the supplier price. This is especially important in U.S. retail-choice markets, where delivery stays with the local utility.
Variable rates require extra caution. A current introductory or first-month rate is not a guaranteed annual price unless the contract says so.
Official source wins. If WattCostLab, an imported export and the official comparator disagree, use the current official comparator and supplier contract.
Sponsored placement cannot change ranking. WattCostLab does not move a supplier up the cheapest-cost ranking because of advertising or referral compensation.