Setting Up Your Household Electricity and Gas in Portugal in 2026 — A Practical Guide to the Free Market, Contracted Power, the Social Tariff, Switching Suppliers and the New Consumer Protections

Few administrative tasks feel as deceptively simple — and turn out as confusing — as getting the electricity and gas working in a new Portuguese home. The country runs a liberalised energy market with a dozen competing suppliers, a regulated fallback tariff, a confusing vocabulary of codes and kilovolt-amperes, and a social tariff that millions qualify for without realising it. This guide explains how the system works in 2026, what you need to sign a contract, how to avoid overpaying, and the rights you now hold as a consumer — including the protections written into the Government's latest energy decree.

A note before starting: energy contracts, tariffs and tax rates change, and individual circumstances differ. Treat this as an orientation, and confirm current prices with suppliers and with ERSE (the Entidade Reguladora dos Serviços Energéticos, the Energy Services Regulatory Authority) before committing.

The free market versus the regulated market

Portugal's household energy market is liberalised. That means you choose your supplier (comercializador) on the open market — the mercado livre (free market) — and that supplier sets your price within the rules ERSE polices. The older regulated market still exists as a safety net through the supplier of last resort (comercializador de último recurso, or CUR), which for electricity is SU Eletricidade. Most households are now on the free market, where competition and product variety are greater, but the regulated tariff remains a transparent benchmark and a fallback if a free-market supplier fails.

The physical wires and pipes, meanwhile, belong to the distribution network operators — E-Redes for electricity and the regional gas distributors — regardless of which supplier you buy from. Switching supplier never touches the infrastructure: the same cables deliver the power, only the company that bills you changes.

What you need to open a contract

To set up a new electricity or gas contract, have the following ready:

• Your NIF (Número de Identificação Fiscal, the tax identification number) — non-negotiable for any contract in Portugal.
• Identification — citizen card, residence permit or passport.
• The property's CPE (Código de Ponto de Entrega, the electricity delivery-point code) and, for gas, the CUI (Código Universal de Instalação, the universal installation code). These long codes identify the exact meter; you will find them on any previous bill for the address, or the landlord or previous occupant can supply them.
• An IBAN if you want to pay by direct debit (débito direto), which most suppliers reward with a small discount.
• The address and, ideally, a recent meter reading.

If the property has never had a connection — a new build, for instance — you are dealing with a first connection rather than a contract transfer, which involves the network operator and a technical inspection, and takes longer.

Contracted power: getting the kVA right

Every electricity contract specifies a contracted power (potência contratada), measured in kilovolt-amperes (kVA). This is the maximum the installation can draw at once; exceed it and the trip switch cuts the supply until you reduce the load. You pay a fixed daily standing charge tied to this level, so over-sizing means paying every day for capacity you never use, while under-sizing means nuisance trips.

Standard low-voltage (Baixa Tensão Normal, or BTN) power levels run in fixed steps: 1.15, 2.3, 3.45, 4.6, 5.75, 6.9, 10.35 kVA and upwards. A small flat occupied by one or two people often runs comfortably on 3.45 kVA; a typical family home with an electric oven, hob and water heater usually needs 5.75 or 6.9 kVA. If your trip switch keeps cutting out when several appliances run together, you are under-powered; if it never trips and your bill's fixed component feels high, you may be over-powered and can ask to step down.

Choosing a tariff

Beyond power, you choose a tariff schedule and a pricing structure.

The schedule determines whether the price per kilowatt-hour varies by time of day:

• Simples — a single flat rate at all hours. Simplest, and fine for low or unpredictable usage.
• Bi-horária — two rates, a cheaper off-peak (vazio) band, typically overnight, and a more expensive peak band. Worthwhile if you can shift heavy loads — dishwasher, washing machine, water heater, electric-vehicle charging — to off-peak hours.
• Tri-horária — three bands, generally for larger consumers.

The pricing structure is the choice between a fixed-price contract, where the rate is locked for the contract term, and an indexed contract, where the price tracks the wholesale market (broadly, the Iberian electricity market, MIBEL). Fixed prices buy predictability; indexed prices can be cheaper when wholesale prices are low but expose you to spikes. Under the Government's 2026 energy decree, every supplier with more than 200,000 customers must offer a fixed-term, fixed-price contract of at least a year — so a price-certainty option is now guaranteed to exist at the large retailers.

Comparing suppliers

The major suppliers on the free market include EDP Comercial, Galp, Endesa, Iberdrola, Goldenergy, Repsol and others, many offering dual-fuel bundles that put electricity and gas on one contract and one bill, usually with a discount. Headline discounts are easy to advertise and hard to compare, because they apply to different base prices.

The neutral way to compare is the official price simulator run by ERSE at comparador.erse.pt. Enter your contracted power, tariff schedule and estimated annual consumption, and it ranks every offer on the market by total annual cost — cutting through marketing claims to the figure that matters. Use it before signing and again whenever your contract's promotional period ends.

The social tariff — and why you might already qualify

The social tariff (tarifa social) is a statutory discount on the electricity (and natural gas) bill for lower-income households. Crucially, it is granted automatically: there is generally no application to fill in. The authorities cross-check energy customers against the recipients of qualifying social supports — among them the Solidarity Supplement for the Elderly (Complemento Solidário para Idosos), the social integration income (Rendimento Social de Inserção), the social unemployment benefit, the social old-age pension, the family allowance at the lower brackets and the social inclusion benefit — and apply the discount to those who match.

If you receive one of those supports and are not seeing the discount, raise it with your supplier. And under the 2026 decree, the social tariff now follows you automatically when you switch supplier, so you no longer risk losing it in the gap between contracts — historically a reason vulnerable households avoided shopping for a better deal.

Gas: piped, bottled or canalised

Gas comes in three forms in Portugal. Piped natural gas (gás natural canalizado) is contracted much like electricity, with its own CUI code and supplier choice, and is common in cities and newer developments. Where there is no mains gas, homes use bottled gas — the familiar orange or blue botija of butane or propane — bought outright and swapped when empty, or a canalised bottled-gas system feeding a building from shared tanks. If your kitchen or water heater runs on gas, check which system the property uses before you move in, as it changes both your setup and your running costs.

Billing, VAT and direct debit

Bills combine a fixed daily charge (driven by your contracted power), a variable charge for the energy consumed, network access tariffs, levies and VAT (IVA). Electricity carries VAT, with a reduced rate applied to a baseline tranche of consumption for households on lower contracted-power levels — a deliberate cushion for ordinary domestic users. Paying by direct debit and opting for electronic invoicing (fatura eletrónica) typically earns a small discount and avoids missed-payment problems. Keep an eye on whether your bill is based on an actual meter reading or an estimate; suppliers reconcile estimates periodically, which can produce a surprise adjustment.

Switching supplier

Switching is designed to be painless and is a core consumer right. It is free, there is no interruption to your supply, and you generally do not need to notify your old supplier — the new one handles the transfer, which usually completes within about three weeks. Watch only for any minimum-term or loyalty clause with an early-exit penalty in your current contract, and time the switch for when any such period ends. Because the wires and meter never change, there is no technical downside to moving for a better price.

Your rights when things go wrong

The 2026 energy decree strengthens the consumer's hand considerably. A supplier may not cut your electricity during critical peak-demand periods of winter and summer, nor while a billing complaint or formal dispute is still being resolved. Economically vulnerable households have a right to a payment plan tailored to their means, and any customer more than 60 days in arrears must be offered a payment plan rather than simply disconnected.

If you have a complaint, the first step is the supplier's own channels and the official complaints book (livro de reclamações, available in electronic form). Unresolved disputes can be taken to ERSE and to the consumer dispute-resolution centres (centros de arbitragem de conflitos de consumo) that cover energy matters, which offer a free, out-of-court route to a binding decision. Keep copies of bills, meter readings and correspondence — they are what settle a dispute in your favour.

Moving home

When you leave a property, arrange a change of holder (transferência de titularidade) or close the contract, take a final meter reading, and make sure the incoming occupant or the supplier has the CPE and CUI codes. Leaving a contract open in your name after you move is a common and avoidable way to keep paying standing charges on a home you no longer occupy.

The bottom line

Setting up energy in Portugal rewards a little homework: get your contracted power right, choose a tariff that matches how you actually use electricity, run the numbers through ERSE's comparator rather than trusting headline discounts, and check whether you qualify for the automatic social tariff. With the 2026 decree, the rules now tilt more firmly towards the consumer — but the savings, and the protections, still go to the households that know to claim them.