--- title: "How to switch energy supplier in Spain in 2026 (and why most homeowners are still overpaying)" seoTitle: "Switch Energy Supplier Spain 2026 — Step-by-Step Guide" excerpt: "Switching electricity supplier in Spain is free, takes 5–20 working days, and can save €150–€400 a year. Here's exactly how to do it before the March 2026 tax relief expires." metaDescription: "Step-by-step guide to switching energy supplier in Spain in 2026: find your CUPS, use the CNMC comparator, choose PVPC or fixed rate, and lock in the right deal before tax relief ends." heroAlt: "Illustration of a homeowner unlocking a tangle of energy cables and routing power cleanly to a Spanish home." faq: - question: "Does switching electricity supplier interrupt my supply?" answer: "No. Spanish law prohibits any interruption to electricity supply during a commercial switch. The physical connection does not change — only the commercial contract does." - question: "Can I switch supplier if I'm not a resident in Spain?" answer: "Yes. Non-resident property owners can switch supplier. You will need a Spanish bank account for direct debit, your NIE or passport number, and your CUPS code. Some suppliers require a Spanish billing address (your property address is sufficient)." - question: "How long does switching take in Spain?" answer: "Between 5 and 20 working days. The variation depends on billing cycle timing and whether any permanencia conditions apply to your current contract." - question: "What is a CUPS number and where do I find it?" answer: "CUPS stands for Código Universal de Punto de Suministro. It is a 20–22 character code starting with 'ES' that permanently identifies your electricity connection. It is printed on every electricity bill." - question: "Can I switch if I'm on PVPC?" answer: "Yes. PVPC has no minimum term and no exit conditions. You can switch from PVPC to a free market tariff at any time, and back again, with no fees." - question: "Do I need to speak Spanish to switch supplier?" answer: "Not necessarily. Holaluz, Octopus Energy Spain and several other suppliers offer English-language customer service. The CNMC comparator is in Spanish only, but the key number it shows — total annual cost — is presented as numbers." - question: "What happens to my current contract when I switch?" answer: "Your new supplier initiates the termination with your old supplier as part of the switching process. You will receive a final bill from your old supplier covering consumption up to the switch date. You do not need to contact your old supplier separately." --- Here is the number that should make you put down your coffee: in 2024, **13.7% of Spanish households switched energy supplier** — nearly 4 million supply contracts, according to the CNMC's Household Panel published in May 2025. Of those who switched, **84.6% said they did it to save money**. The Spanish energy market rewards homeowners who switch. It penalises those who stay. If you have not reviewed your energy contract in the past 12 months — or if you signed whatever your estate agent or the previous owner recommended when you bought your property — you are almost certainly paying more than you need to. Not by a little. Potentially by **€150–€400 per year, every year**, without doing anything differently. This guide explains exactly how to switch energy supplier in Spain, what you need to do it, and why the window between now and the end of June 2026 matters specifically. ## {#why-now} Why now specifically Spain's government passed Royal Decree-Law 7/2026 on 20 March 2026 as part of its response to the Middle East energy crisis. The decree introduced two temporary tax cuts that now appear on every electricity invoice issued from 22 March 2026: 1. **VAT on electricity reduced from 21% to 10%** — for residential contracts with contracted power up to 10 kW (covering the vast majority of homes and holiday properties in Spain). 2. **Special Electricity Tax cut from 5.11% to 0.5%** — applies to all consumers regardless of contracted power. These measures are currently set to run until **30 June 2026**, with the June portion conditional on April's electricity CPI. After that, both rates are scheduled to revert unless extended. The practical consequence: your electricity bill for April and May 2026 is lower than it will be in July. The underlying tariff — the kWh rate and the potencia standing charge you chose (or inherited) — is still there underneath the tax relief. When the taxes go back up, they magnify whatever you are overpaying on the tariff itself. Switching to the right contract now means you benefit from the tax relief *and* you are on the right rate when it ends. According to Endesa's own analysis, the combined effect of the VAT reduction and the Special Electricity Tax cut represents roughly **15% savings** on a typical residential bill for a property with 4.41 kW contracted power and 3,272 kWh annual consumption. That layers on top of whatever you save by being on the right tariff in the first place. ## {#loyalty-tax} The problem with staying loyal Spain's energy market is structured in a way that actively penalises loyalty. The best contract rates — introductory discounts, lower kWh rates, no *permanencia* offers — are almost universally reserved for new customers or new contracts. Your current supplier has no financial incentive to proactively move you onto a better deal. If you signed a fixed-rate contract 18 months ago and have not reviewed it since, you are almost certainly paying a rate that has been undercut by newer offers — including from your own supplier. The CNMC's 2024 switching data confirms what anyone who has tried this knows: the savings are real. Of the 4 million households who switched in 2024, around 300,000 reported the process was "difficult or very difficult" — meaning **93% found it manageable**. The friction is low. The savings are not. ## {#cups} What you need before you start: the CUPS number Before you can switch electricity supplier in Spain, you need one piece of information: your **CUPS number** (Código Universal de Punto de Suministro). The CUPS is a 20–22 character code that starts with "ES" and identifies your electricity connection point. It is permanently attached to your property address — it does not change when you switch suppliers, and it stays with the address even if you sell. You will find it: - On any electricity bill, usually in the header or the *datos del contrato* section - In your supplier's online customer portal - On the electricity meter itself (sometimes) The CUPS is the only code your new supplier needs to initiate the switch. They contact your current supplier and the distributor using it. You do not need to cancel your old contract — your new provider handles all paperwork. :::callout info "Costa Blanca homeowners" The CUPS for properties in Alicante province starts with **ES0031** followed by the unique address identifier. If yours starts with a different regional prefix it still works the same way — the prefix just identifies the distributor's zone. ::: ## {#step-1-baseline} Step 1: Know what energy contract you're currently on Before comparing anything, establish your baseline. Pull out your most recent electricity bill and identify: | What to find | Where to look on the bill | | --- | --- | | Your CUPS number | Header section or *datos del punto de suministro* | | Contracted power (potencia) in kW | *Potencia contratada* — typically 3.3, 4.6, 5.75 or 6.9 kW | | Current tariff type | Look for *PVPC*, *tarifa regulada*, or your supplier's product name | | Annual estimated consumption (kWh) | *Consumo anual estimado* or the sum of your last 12 months | | kWh rate you're paying | Energy charge section — compare P1/P2/P3 if on time-of-use | The annual consumption in kWh is the key input for any comparison. If you do not have 12 months of bills, most supplier portals show historical consumption by month — worth checking before you start comparing. If reading a Spanish electricity bill feels like deciphering a government document (because it is), see our full guide: [How to read your Spanish electricity bill — line by line →](/tips/articles/read-spanish-electricity-bill) ## {#step-2-tariff-types} Step 2: Understand what energy contract you're choosing between Spain's electricity market has two main contract types. The right one for you depends on your usage pattern, which varies significantly depending on whether you live in Spain full-time or use the property as a holiday home. ### PVPC — the regulated tariff The PVPC (Precio Voluntario para el Pequeño Consumidor) is Spain's government-regulated tariff. Prices change every hour, set by the wholesale electricity market operated by OMIE. There is no minimum contract term and no exit fees — you can leave at any time. **Who it suits:** Full-time residents or remote workers who have the flexibility to shift consumption to off-peak (*valle*) hours — midnight to 8am on weekdays, all day Saturday, Sunday and public holidays. When you genuinely do this, PVPC valle rates can drop to €0.04–0.07/kWh, significantly cheaper than any fixed-rate alternative. **Who it does not suit:** Holiday-home owners whose consumption is concentrated in summer daytime and evenings — the most expensive PVPC hours. ### Fixed-rate contracts — the free market Over 300 licensed electricity retailers operate in Spain's free market, offering fixed-rate contracts where the kWh price does not change with daily wholesale conditions. The price is agreed at signing and locked for the contract term (typically 12 months). **Current market range:** Fixed-rate offers in April 2026 range from approximately **€0.13 to €0.20/kWh** depending on supplier, contract term and whether time-of-use bands apply. Some suppliers offer flat rates; others offer banded rates (lower overnight, higher during peak hours) within a fixed framework. **What to watch for:** Some fixed contracts include a *permanencia* clause. By law, the maximum exit penalty is capped at **5% of the remaining contract value** — on a €600/year contract with six months left, that is a maximum of €15. Confirm this in writing before signing. Many suppliers — including several serving the Costa Blanca market — now offer no-*permanencia* fixed contracts. ## {#step-3-comparator} Step 3: Compare using the CNMC comparator The [CNMC's official electricity offer comparator](https://www.cnmc.es/areas-de-actividad/energia/comercializacion/comparador-de-ofertas) is genuinely useful and entirely neutral. It is not a commercial aggregator. It shows real offers from all licensed suppliers, ranked by total annual cost for your consumption profile. To use it you need: - Your annual consumption in kWh - Your contracted power (potencia) in kW - Your CUPS (optional but improves accuracy) The comparator shows the full cost — including the potencia standing charge, the energy rate and applicable taxes — not just the headline kWh rate. This matters because some suppliers advertise a low kWh rate while burying a high standing charge that more than offsets the saving. The only number that counts is the **total annual cost** for your specific consumption. :::callout warning "The trap to avoid" Comparing kWh rates in isolation. A supplier advertising €0.11/kWh sounds excellent — until you notice their monthly standing charge is €22. Run the full annual cost calculation, not the headline number. ::: ## {#step-4-potencia} Step 4: Check whether your potencia is right first Before you switch tariff, check whether your contracted power (potencia) is right for your property. This is a separate action from switching supplier, but it affects total cost on any tariff you move to. The potencia standing charge is typically **€0.115–0.132 per kW per day** in 2026 — a cost you pay regardless of consumption. A property contracted at 6.9 kW that only ever needs 4.6 kW is paying around **€125–€130 more per year** before a single kWh is consumed. For a full breakdown of how to identify and fix an oversized potencia contract — including a worked example for a Costa Blanca villa — read: [Why your potencia contratada is probably wrong →](/tips/articles/why-your-potencia-contratada-is-probably-wrong) ## {#step-5-the-switch} Step 5: Switch — what actually happens Once you have chosen a new supplier, the process works as follows: 1. **You contact the new supplier** — online, by phone, or in person. You provide your CUPS number and agree the new contract terms. 2. **The new supplier notifies your current supplier** via the regulated switching process managed through the Iberian electricity market infrastructure. You do not need to contact your old supplier. 3. **Your supply is never interrupted** — Spanish law prohibits any gap during a commercial switch. The meter does not move; only the commercial relationship changes. 4. **The switch completes in 5–20 working days** — variation depends on billing cycle timing and any *permanencia* conditions on your current contract. 5. **You receive one final bill from the old supplier** covering consumption up to the switch date — and your first bill from the new supplier starts from that same date. There are no switching fees, no technician visits and no paperwork beyond the new contract. The CUPS number is the only information required to initiate the process. ## {#suppliers} Who are the main suppliers worth considering Spain has over 300 licensed electricity retailers. In practice, for a Costa Blanca homeowner, the realistic shortlist is considerably shorter. Here are the main players as of 2026, with honest notes on each: | Supplier | Type | English support | Notes | | --- | --- | --- | --- | | Holaluz | Free market, fixed | Limited | Strong green credentials, transparent pricing, no *permanencia*, popular with Costa Blanca homeowners | | Octopus Energy Spain | Free market, fixed + indexed | Yes | UK-origin, strong app, good customer service reputation, growing Costa Blanca presence | | Frank Energy | Free market, variable indexed | Limited | OMIE-indexed margin model — transparent but requires comfort with market pricing | | Endesa Clientes | PVPC and free market | Yes | Largest supplier, broad product range, customer service variable by region | | Iberdrola / Curenergía | PVPC and free market | Yes | PVPC only via Curenergía; Iberdrola brand for free market products | | Naturgy | PVPC and free market | Limited | Strong in gas+electricity bundles; customer service has improved | | Repsol Luz | Free market, fixed | No | Competitive rates; primarily Spanish-market focused | *This table reflects publicly available information as of April 2026. Tariff rates and customer service standards change — always verify current offers directly before signing.* **For the Costa Blanca specifically:** the distributor for most of Alicante province is i-DE (Iberdrola Distribución) — they own and maintain the physical network and meter. Your choice of commercial supplier does not affect which distributor serves your property. If you have a technical fault or grid issue, you contact i-DE, not your commercial supplier. ## {#what-switching-fixes} What switching will and won't fix Switching supplier **will fix:** an uncompetitive kWh rate, a contract with bundled optional services you did not ask for, a *permanencia* that has now expired, and a fixed rate that has been undercut by better offers since you signed. Switching supplier **will not fix:** an oversized potencia (you need to reduce that separately, through your new or existing supplier), standby and phantom loads running in an empty property, an inefficient old fridge or air-conditioning unit, or a pool pump running on expensive daytime rates. For those, see our full appliance breakdown: [Electricity costs in Spain 2026 — what's really driving your bill →](/tips/articles/electricity-costs-spain-2026-what-drives-your-bill) ## {#tax-window} The tax relief window: act before July Royal Decree-Law 7/2026 cut electricity VAT from 21% to 10% and the Special Electricity Tax from 5.11% to 0.5% from 22 March to 30 June 2026. The June portion is conditional on April's electricity CPI data, published by INE in May. When these measures expire — assuming they are not extended — VAT reverts to 21% and the electricity tax reverts to 5.11%. That is a combined tax increase of over 20 percentage points on the tax component of your bill, landing on top of whatever underlying tariff rate you are on. This is not an argument for panic-switching to a bad contract. It is an argument for doing the comparison you should have done 12 months ago, doing it properly, and having the right contract in place before July when the taxes go back up. If your current contract expires before June, you have a natural switching window with no *permanencia* considerations. If it does not, check the exact penalty — at a maximum of 5% of remaining value, it is almost certainly less than a full summer's overpayment on the wrong tariff. ## {#fastest-way} The quickest way to know if you're overpaying Upload your most recent electricity bill and we extract your CUPS, your contracted power, your time-period consumption split and your current tariff automatically. We then show you what you would pay on the best available alternatives from compliant Spanish suppliers — calculated on your actual billing data, not on an annualised average that flatters the comparison. If you are paying more than you should, we show you by how much and which suppliers would improve it. If you are already on a competitive deal, we will tell you that too. We respect your data — bills are deleted 30 days after switching. ::cta:: ## {#summary} Summary: what to do this week 1. **Find your CUPS number** — it's on any electricity bill. 2. **Note your contracted power (potencia) and annual consumption (kWh)** — from the same bill. 3. **Run a comparison on the CNMC comparator** — free, neutral, covers all licensed suppliers. 4. **Check your potencia is right** — separate from your contract, but affects total cost on any tariff. Guide: [Why your potencia contratada is probably wrong →](/tips/articles/why-your-potencia-contratada-is-probably-wrong) 5. **Switch before mid-June** — to have your new contract in place before the tax relief expires and your summer bills arrive. Or skip steps 1–3 and upload your bill — we make switching simple.