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Electricity & gas · Spain
Checked 2026-09-30

⏱️ Fixed price or dynamic (hourly) electricity contract in Spain: which is right for me?

The short answer

A fixed price stays the same for an agreed period. A dynamic price follows the wholesale market hour by hour, so it can be cheaper when you shift your use, and more expensive at peak times.

📜 The rules in Spain

Fixed and dynamic contracts

Under Real Decreto 88/2026, every electricity supplier with more than 200,000 customers must offer a dynamic-price contract if you have a remotely read meter. The regulated PVPC also follows the market hour by hour. Fixed-price offers exist on the free market.

  • Before you sign a dynamic contract, the supplier must explain the opportunities, costs and risks, give you an estimate of your monthly bill based on the previous month, and get your consent (Art. 13 RD 88/2026). (boe.es)
  • As a household on the 2.0TD tariff you can end your contract at any time without penalty. Only a fixed-price contract may charge an exit fee before its first yearly renewal, capped at 5% of the estimated energy still to be supplied (Art. 28). (boe.es)
Official source: boe.es · Checked 2026-09-30

🪜 Step by step

  1. Look at how you use energyA dynamic price suits people who can move use to cheap hours, for example with an electric car, a heat pump or a timer. It needs a smart meter.
  2. Check what is on offerSee below what the rules in Spain say about fixed-price and dynamic contracts and who has to offer them.
  3. Read the risks and the termsBefore you sign, the supplier must explain the costs and risks of a dynamic contract. Check the notice period and any exit fee.
  4. Review after a few monthsCompare your bills with what a fixed price would have cost. You can switch again under your contract terms.

📇 Who to contact

Comparador de ofertas de energía (CNMC) officialCompare electricity and gas offersBefore you switch, or when your price goes up🔗 comparador.cnmc.gob.es
CNMC - Comisión Nacional de los Mercados y la CompetenciaSupervises energy companies and explains your rightsFor information, and to report a company that breaks the rules🔗 www.cnmc.es

❓ Questions

Is a dynamic contract cheaper?

Only if you use a lot of power when prices are low. At peak times it can cost much more than a fixed price.

Do I need a smart meter?

Yes. Hourly prices need a meter that records your use per hour or per quarter hour.

Can a fixed price still go up?

Normally not during the fixed period, but taxes and network charges can change. The rules for Spain are on this page.

📎 Sources

Checked: 2026-09-30

🧭 Is this still correct?

We check this information carefully, but phone numbers, websites and rules change — and sometimes we get something wrong. Spotted a mistake or a change? Let us know below.

🔗 Also useful

📈Price increase→🔄Switching supplier→📟Smart meter→🧾Wrong or high bill→💸Can’t pay the bill→

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