Setting Up Electricity (Contrato de Eletricidade) in Portugal in 2026 — A Practical Guide to the Mibel Liberalised Market, the Comercializadores Shortlist, the CPE Identifier, the Potência Contratada Ladder, the Tarifa Social and the ERSE Switching Window

The Portuguese residential electricity market in 2026 is a fully liberalised retail market operating inside the Iberian wholesale market (Mibel) Portugal shares with Spain. The infrastructure — the distribution grid, the meter, the customer connection point — is run by E-Redes (the rebranded former EDP Distribuição) under the regulated transport-and-distribution regime supervised by the Entidade Reguladora dos Serviços Energéticos (ERSE). The retail layer is open to any licensed comercializador, and the customer is free to choose the supplier, switch at any time and carry the same connection across providers without losing the Código de Ponto de Entrega (CPE) that identifies the grid hook-up. This guide is the operational walkthrough for a foreign resident setting up an electricity contract for a new rental, a purchase or a move.

The Two Markets — Free vs Regulated

The default for a new domestic contract in 2026 is the mercado livre (free market), where every comercializador sets its own price plans, billing terms and bundled extras. The mercado regulado still exists for households that have not transitioned, but the rates are set by ERSE on a quarterly basis and the supplier of record is the Comercializador de Último Recurso, the universal supplier of last resort, known commercially as SU Eletricidade. SU Eletricidade is also the supplier that automatically picks up a customer whose free-market contract is terminated without a replacement provider in place, so no household ever loses supply because a contract lapses — but the post-fallback price tends to be uncompetitive against the free-market shortlist and the operational answer for most residents is to be on the free market with an active contract.

The Comercializadores Shortlist

The ERSE register of licensed retail comercializadores carries dozens of entries, but the operational shortlist for foreign-resident households runs through eight or nine names:

• EDP Comercial — the incumbent's retail arm and the largest single supplier; widest plan menu, full app and bilingual onboarding flow.
• Endesa — the Spanish incumbent's Portuguese arm; well-priced fixed plans and a bilingual call centre.
• Iberdrola — a Spanish multinational with a digital-first proposition and gas-and-electricity dual fuel bundles.
• Galp Power — the Portuguese energy group's electricity arm, often paired with a Galp service-station discount.
• Goldenergy — an independent retailer with a sharper price tilt; strong on bi-horária plans.
• Plenitude — the Eni-backed retailer (formerly Eni Plenitude) with a green-tariff focus.
• Repsol — the Spanish energy group's electricity arm.
• SU Eletricidade — universal supplier of last resort; the regulated-market default and the fall-back if a free-market contract terminates without replacement.
• MEO Energia — telecoms-bundled retailer (electricity inside the MEO subscription package).

The ERSE comparison portal at simulador.precos.erse.pt is the regulator's own apples-to-apples simulator across the licensed retailers, using the customer's monthly kWh and the contracted power level as the inputs.

The CPE — Your Connection's Permanent ID

The Código de Ponto de Entrega (CPE) is the 20-character identifier — starting with the prefix PT — that E-Redes assigns to every grid connection in mainland Portugal. The CPE travels with the connection, not with the household: when you move out of a flat the CPE stays attached to the flat, and when you sign a new contract for the same flat under your name the CPE is the operational identifier the new comercializador uses to register your contract against the grid. You will find the CPE on any previous tenant's bill, on the meter cabinet itself, or by calling E-Redes on 16 215 with the address. The CPE is the single most important number to collect before starting a contract.

The Potência Contratada Ladder

The potência contratada is the contracted power level — the kVA cap that determines how much electricity can flow through your connection at any instant before the breaker trips. It also drives the fixed daily charge on every bill, which is the larger of the two line items for low-consumption households. The standard ladder in 2026 runs:

• 1.15 kVA (very small studio, minimal load)
• 2.3 kVA
• 3.45 kVA (small one-bed flat)
• 4.6 kVA (typical one- to two-bed flat)
• 5.75 kVA (typical two- to three-bed flat with electric water heater or hob)
• 6.9 kVA
• 10.35 kVA (large flat or villa with multiple high-draw appliances)
• 13.8 kVA
• 17.25 kVA
• 20.7 kVA (large villa, pool, electric car charging, A/C)

The level can be changed up or down by request to the comercializador; the change is processed by E-Redes and can take days to weeks depending on whether physical work is required. Over-contracting is the most common error — picking the highest level on the menu means paying a larger fixed daily charge every month for power you never use. Under-contracting is the second-most common, with the breaker tripping when the oven, the dishwasher and the A/C run simultaneously.

The Tariff Options — Simples, Bi-Horária, Tri-Horária

Inside any comercializador's menu, the tariff schedule is the second axis after the potência:

• Tarifa Simples: a single per-kWh rate 24/7; the right choice for households with flat consumption through the day and no incentive to shift load.
• Tarifa Bi-Horária: a higher daytime rate and a lower night-time rate; the night window can be set as diário (every night) or semanal (full weekend off-peak as well). The right choice if you can run the washing machine, the dishwasher and EV charging overnight.
• Tarifa Tri-Horária: three time-of-use bands — peak (the early-evening Iberian peak), shoulder and off-peak. Worth it only above ~10.35 kVA contracted power and for households that actively shift load.

The IVA Split and the Audiovisual Levy

Domestic electricity bills carry the Portuguese IVA at a split rate: the reduced 6% rate applies to the fixed daily charge and to the first tranche of monthly consumption (the exact kWh threshold tracks the contracted power level under the Portaria in force), while the standard 23% rate applies to consumption above the tranche. Every monthly bill also carries the Contribuição Audiovisual — a flat levy that funds RTP — added as a separate line. The bundling of these two items means a low-consumption household actually pays a higher effective rate per kWh than a mid-consumption household when the daily standing charge and the audiovisual line are spread over fewer kWh.

The Tarifa Social de Eletricidade

The Tarifa Social de Eletricidade is a regulated discount of roughly a third on the per-kWh and fixed-charge components, automatically applied to households whose income and household composition meet the threshold under the Decreto-Lei framework. Enrolment is automatic — the Autoridade Tributária and the Segurança Social cross-reference the income data and the comercializador applies the discount on the next bill — but eligibility is reviewed annually and a household that loses eligibility (or whose comercializador never received the cross-reference signal) needs to follow up with both AT and the supplier. The government has flagged the 2016 auto-assignment rules for a tightening in 2026 after the IEA's audit pointed to undeclared-high-income foreigners drawing the discount; the structural eligibility test for resident lower-income households is not changing.

How to Actually Set Up the Contract

1. Collect the CPE. From a previous tenant's bill, from the meter cabinet, or by calling E-Redes on 16 215 with the address. Without the CPE no comercializador can register a contract.
2. Pick the comercializador. Run the ERSE simulator at simulador.precos.erse.pt with your expected monthly kWh (a one-bed flat without electric water heating is roughly 100-150 kWh/month, a two-bed family flat with electric hob and oven is 250-400 kWh/month, a villa with A/C and pool is 600+ kWh/month) and the contracted power level.
3. Open the contract online or by phone. Required documents: NIF, Cartão de Cidadão or residency permit, IBAN for direct debit, the CPE. The comercializador will register the contract with E-Redes and schedule the change of supplier.
4. Wait for activation. If the CPE is already active under a previous resident, the switch is administrative — typically 1-3 weeks. If the CPE has been disconnected (an empty flat for a long period) the comercializador will request a religação from E-Redes and a technician visit may be required.
5. Confirm the first bill. Check the contracted power level, the tariff schedule, the IVA split and the audiovisual line. Errors at this stage — wrong potência, wrong tariff schedule — are the most common and the easiest to fix in the first 30 days.

Switching Providers

Switching comercializador in the mercado livre is free, contract-terminable at any time and processed centrally through the operational settlement between the new comercializador and E-Redes. The customer does not need to notify the outgoing supplier — the new comercializador handles the registration and the old contract terminates on the changeover date. Typical lead time is 2 to 4 weeks from contract signature to the first invoice on the new provider. Fidelização (lock-in clauses) is rare in domestic electricity contracts and where it exists is generally limited to bundled dual-fuel or telecom plans; standard single-electricity plans terminate at will.

New Connections — When the CPE Doesn't Exist Yet

If the property has never been connected (a new build) or the connection has been removed (an old country house long disconnected), the customer or the contractor files a pedido de ligação with E-Redes through the e-redes.pt portal or via 16 215. The request triggers a site visit, an engineering assessment and a quote for the connection works — the cost varies widely with distance from the existing low-voltage network and may run from a few hundred to several thousand euros. Once the connection is built and the CPE is issued, the customer signs the retail contract with any chosen comercializador.

Outages — Who to Call

Outages are an E-Redes matter, not a comercializador matter. The 24/7 line for grid faults is 800 506 506 (free national number); the same line handles emergency disconnects for safety. The comercializador handles invoicing, contract changes and customer service, but cannot do anything about a power cut on the grid. The Banco de Portugal's post-apagão payment-resilience plan is the systemic response to the April 2025 blackout; the household-level operational answer is to know the E-Redes number and to keep a small cash reserve for the post-blackout interval before terminals come back up.

Common Failure Modes

• Contracting without the CPE — the most common mistake; the supplier cannot register the connection. Always collect the CPE first.
• Over-contracting potência — paying a larger fixed daily charge every month for headroom you do not use; check the previous tenant's pattern before picking the level.
• Picking a tri-horária or bi-horária plan and not shifting load — paying a higher daytime rate without earning back the night-time saving; the simples tariff is the safer default if you don't actively manage load.
• Treating the universal supplier of last resort as a long-term option — the SU Eletricidade fall-back is uncompetitive against the free-market shortlist for any household above minimal consumption.
• Confusing comercializador with E-Redes — calling your supplier about a power cut wastes both your and their time; outages are an E-Redes call.

What This Means for You

• New arrivals signing a rental: ask the landlord for the previous tenant's last electricity bill and the CPE before the move-in; you can have a contract in place on the day of move-in if the CPE is already active.
• Property buyers: the existing CPE survives the change of ownership; the buyer signs a fresh contract under their NIF and the supplier handles the registration.
• Solar-curious households: a UPAC autoconsumo installation works under your existing comercializador contract; see our Solar Self-Consumption (Autoconsumo) practical guide for the DGEG communication and the ERSE surplus-injection rules.
• EV owners: charging at home runs through the same residential meter; the bi-horária night plan is the operational answer for charging cost, and the public-charging side is covered in our EV Charging guide.
• Lower-income households: the Tarifa Social applies automatically off the AT/Segurança Social income cross-reference; if the discount does not appear on the bill in the first three months, request a manual review through the comercializador with proof of income.
• Empty properties: consider downsizing the potência contratada to the minimum ladder during long-vacancy periods to reduce the fixed daily charge; reactivating the higher level later is a same-day change at most comercializadores.

Sources: Entidade Reguladora dos Serviços Energéticos (ERSE) — Regulamento Tarifário 2026 and comercializador register; E-Redes connection-and-meter procedures; Decreto-Lei framework for the Tarifa Social de Eletricidade; Mibel operating rules under the Portugal-Spain electricity-market accord.