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Since the liberalisation of the electricity market in 2008, switching electricity supplier has been a procedure that anyone can carry out, free of charge and with full guarantees.
In 2025, around 14% of households changed electricity supplier, with the main reason being savings on the bill. More than 85% of users who switched supplier gave this as their reason, according to data from the CNMC Household Panel.
In this article, we guide you step by step so you can switch supplier without complications and find the option that best suits your needs. You will see that the process is simpler than you might expect.
Switching electricity supplier is usually free of charge, provided that you do not have a minimum contract period with your current company. It also does not involve any interruption to your electricity supply.
Here is how to switch electricity supplier in Spain.
Your electricity bill contains key information that will help you understand your consumption and decide what type of tariff you need.
Some important details to review are:
If you have doubts about how to understand your electricity bill or how to calculate it, we explain it in our articles so you can analyse your needs and make informed decisions.
Everyone has different routines and consumption habits. That is why, before switching electricity supplier and choosing a new offer, it is important to study the characteristics of your home and lifestyle.
What contracted power capacity do I need?
The contracted power capacity has a direct impact on the cost of your bill. Contracting more power than you need can increase your expenses, while contracting too little could cause power cuts if you exceed the limit.
If you need to adjust your power capacity, check how to change your contracted power capacity easily and complete the process without complications.
The first thing to consider is the number of high-consumption appliances you usually use at the same time.
As a general reference:
Understanding your consumption habits and those of the people living in the home will help you choose correctly.
Choosing the right tariff is key to optimising your consumption and saving on your electricity bill.
There are different types of tariffs designed for different lifestyles and consumption habits:
If you know which option is best for you but are not sure how to make the change, we recommend reading our step-by-step guide on how to change your electricity tariff. There, you will find all the information you need to make an informed decision.
At Repsol, we have designed different tariffs with you and your needs in mind.
Discover all the Repsol electricity tariffs available to you. If you do not know which tariff best adapts to your consumption habits, we explain how to choose the best tariff according to your consumption.
Once you have chosen the type of electricity tariff you want, you need to contact the supplier.
The new supplier will be responsible for sending the change request to the energy distributor in your area. The distributor will then inform all parties involved and provide the meter reading.
This means your electricity supply will not be interrupted at any point.
It is a simple process: according to the latest CNMC studies, 93% of users said they did not encounter any difficulties.
Today, electricity suppliers offer many customer service channels so you can manage your contracts easily:
At Repsol, we want to make things easy for you. To make the switch quick and avoid unnecessary procedures that waste your time, you can contract your new tariff with just one call or by sending us your bill. We will reply with a personalised offer and the best tariff for your home.
The electricity company you are switching to will need a series of details to formalise the contract and start the supplier change process.
These details are:
With Repsol, you can contract fully online by filling in the sign-up form for the tariff you want and signing it.
There are many reasons to switch electricity supplier.
According to the 2025 CNMC Household Panel survey, based on multiple-choice responses, the most common reasons are:
85% of users who switched supplier did so for this reason. Electricity tariffs vary between suppliers, so you may find a more economical tariff that fits your consumption and generates significant savings on your bill. For example, tariffs with discounts or lower prices during certain hours.
11% of users who changed electricity company mentioned improved additional benefits. Some companies include benefits in their tariffs, such as our fixed-price tariff with which you can enjoy one year of Movistar Plus+.
7% of households switched supplier to take advantage of combined packages that include both gas and electricity, looking for greater convenience and possible savings when managing both services.
Some users looked for suppliers offering time-of-use tariffs, allowing them to optimise energy consumption during the cheapest hours of the day. Others preferred to switch to tariffs without time-of-use pricing, looking to simplify their billing and avoid price variations depending on when they consume electricity. At Repsol, we offer different options so you can find the one that best suits your habits.
5% of consumers switched supplier because they were interested in contracting green energy from renewable sources, in line with environmental and sustainability values.
Poor customer service experiences led 8% of households to look for alternatives with more efficient and satisfactory support. Efficient and accessible service can make a real difference to your user experience.
A change of residence was also a reason for households to switch supplier, whether because they moved house, the previous supplier did not operate in the new location, or they saw an opportunity to find better conditions.
In short, switching electricity supplier allows you to choose the option that best suits your needs and values.
At Repsol, we are here to help you find the best tariff for your home. Do not hesitate to contact us. We also share tips to save electricity at home so you can start saving today.
Frequently asked questions
Never. You do not need to worry.
During the process of switching supplier, you will not be left without electricity at any point. This procedure only involves a change of supplier, so the distribution company will not suspend your service.
The only thing that changes is the company that bills you for the supply.
You can therefore make the switch with complete peace of mind, knowing that your access to electricity will remain uninterrupted throughout the process.
Yes, you can switch electricity supplier at any time.
There is no legal restriction preventing you from doing so, although it is important to check whether your current contract includes any minimum-term clauses that could lead to penalties.
If your contract has a minimum term and you decide to switch before the agreed period ends, you could face a financial penalty.
However, many suppliers offer tariffs with no lock-in period, allowing you to switch freely whenever you want.
Switching electricity supplier with outstanding debts can be complicated, as suppliers usually require that there are no unpaid bills before completing the transfer.
During the process, the new company checks with the previous one whether there are any unpaid amounts. If there are, the switch may be blocked until you regularise the situation.
That is why it is essential to settle any outstanding debt with your current supplier before requesting the switch. Once the bills have been paid, you can complete the process without issues and enjoy the benefits of a new tariff adapted to your needs.
This will depend on the policy of the new supplier.
Some companies accept customers with unpaid bills, while others require the supply to be up to date before making the switch.
The change of supplier must be authorised by the contract holder.
If you detect a change without your consent, contact your current company immediately and file a complaint.
If you want to cancel the switch, contact the new supplier as soon as possible.
In most cases, you can reverse the process if it has not yet been completed.