Compara tarifas de luz: electricity plans in Spain
Updated: 2026-08-12 · Services and tariffs
Key points
- Your CUPS and annual kWh split by peak/off-peak drive accurate quotes.
- PVPC follows wholesale hourly prices; fixed tariffs lock the energy term.
- Contracted power above real demand inflates every bill regardless of use.
- Free-market retailers must honour the same regulated grid access fees.
- Switching supplier does not require changing your meter or distributor.
Why comparing electricity tariffs matters in Spain
Households that compara tarifas de luz without reading the full bill often chase a low energy price while keeping an oversized contracted power line. In Spain the regulated access tolls and taxes apply to every retailer, so the meaningful differences sit in the energy term, time bands and any bundled services. English-speaking residents in Madrid, Barcelona or coastal provinces face the same market rules as Spanish nationals; distributors remain assigned by region while retailers compete on price and contract length.
PVPC, fixed price and time-of-use options
The PVPC (Precio Voluntario para el Pequeño Consumidor) tracks hourly wholesale prices and suits users who can shift consumption away from expensive hours. Fixed-price tariffs simplify budgeting because the energy component stays stable for the contract period, though early exit fees may apply. Time-of-use plans split valle, llano and punta periods; they reward washing machines or EV charging overnight. When you compara tarifas de luz across these models, model your real consumption pattern instead of assuming an average profile.
Contracted power and regulated charges
Potencia contratada is billed even when you use little electricity. Many flats run comfortably on 3.45 kW or 4.6 kW; higher values suit induction hobs, heat pumps or multiple AC units. Before switching, check whether a downward power adjustment is possible through your distributor without a long wait. Standing charges, the electricity tax and IVA appear on all offers; a comparator that hides them produces misleading savings figures.
Using the CNMC comparator correctly
The Comisión Nacional de los Mercados y la Competencia hosts a neutral tool to compara tarifas de luz from licensed retailers. Enter consumption from your bill or estimate from square metres and heating type. Filter by contract type, renewable label or payment method. Export PDF quotes to compare line by line with your current invoice, including the social bonus if your household income qualifies under regional rules.
Switching retailer without surprises
Changing company is free and typically completes within a few weeks; your distributor still handles outages and meter readings. Read permanencia clauses, digital bill requirements and whether prices update after an introductory trimester. Keep one full billing cycle after the switch to verify kWh prices and power terms. If you rent, confirm with the landlord who holds the contract holder role on the supply point.
What you need
- CUPS code from your latest electricity bill or online customer area
- Twelve months of kWh consumption, ideally split by time band if on discriminación horaria
- Current contracted power in kW and whether a social bonus already applies
- Postal code of the supply address for distributor-specific toll tables
- NIE or DNI of the contract holder for the switch request
Recommended steps
- Download your last three bills and note energy price, power term and total kWh.
- Open the CNMC comparator, enter CUPS and consumption, and save at least four retailer quotes.
- Align quotes on the same tariff type (PVPC, fixed or time-of-use) and contract length.
- Check if lowering contracted power is viable before accepting a new offer.
- Submit the switch online with the chosen retailer and monitor the first post-change bill.
Comparison table
| Tariff type | Best for | Main risk |
|---|---|---|
| PVPC hourly | Flexible schedules, smart habits | Spikes during heat waves |
| Fixed energy price | Predictable monthly budgeting | Missed savings if market falls |
| Time-of-use (3 periods) | Night-heavy consumption | Punta hours on home office days |
| Indexed with cap | Partial wholesale exposure | Cap may still move at renewal |
In this category
FAQ
Does compara tarifas de luz require changing my meter?
No. Smart meters are rolled out nationally; switching retailer keeps the same physical meter and distributor.
Is PVPC always cheaper when I compara tarifas de luz?
Not necessarily. PVPC can beat fixed offers in mild months but surge when wholesale prices spike; model your own hours.
Can expats compara tarifas de luz without a Spanish DNI?
Retailers usually accept NIE and a Spanish bank account; the contract holder must match identity documents supplied.
What if my landlord pays the electricity bill?
Ask for bill copies to compare unit rates; negotiate a switch only if you are named holder or the owner agrees to change retailer.