Moving to Spain? 5 Utility Mistakes Expats Always Make

Moving to Spain is exciting — sunshine, a better lifestyle, and a fresh start. But when it comes to utilities, especially electricity, many expats unknowingly make costly mistakes.

At Compare The Mercado, we review hundreds of energy bills every month, and one thing is clear: most expats are overpaying without even realising it.

If you’re new to Spain (or even if you’ve been here a while), here are the 5 biggest utility mistakes expats make — and how to avoid them.

1. Staying on the Default Energy Tariff

One of the most common mistakes is simply sticking with the tariff that was already set up in the property.

When you move in, the electricity is often:

• Left in the previous owner’s name

• Switched to your name without review

• Set on an outdated or expensive tariff

The problem? Energy prices change frequently in Spain, and what was once a good deal may now be costing you hundreds more per year.

Many expats assume they’re on a competitive rate — but in reality, they’re not.

2. Not Understanding Your Electricity Bill

Spanish electricity bills can be confusing, especially if they’re in Spanish.

Key terms like:

• Potencia contratada (contracted power)

• Punta, Llano, Valle (time-of-use pricing)

• Fixed vs variable tariffs

…can easily be misunderstood or ignored.

As a result, many people:

• Don’t know what they’re paying for

• Can’t spot when something is wrong

• Miss opportunities to reduce costs

If you don’t understand your bill, you can’t optimise it.

3. Overpaying for Potencia (Contracted Power)

Potencia in Spain: What It Is and Why It Matters

Your potencia is the amount of power your home is allowed to use at one time — and it’s a fixed daily charge on your bill.

The issue?Most homes in Spain are set too high.

This means you’re:

• Paying for power you don’t actually need

• Being charged every single day — whether you use it or not

Even a small reduction in potencia can lead to noticeable yearly savings.

We regularly see clients saving money just by adjusting this correctly.

4. Thinking You Can’t Switch Providers

A surprising number of expats believe they must stay with the provider they were given — especially if they’re renting.

This is not true.

In most cases:

• You are free to switch providers

• There are no penalties

• The process is simple and handled for you

Even better — switching doesn’t involve:

• Any interruption to your supply

• Any engineer visits

It’s one of the easiest ways to reduce your bills.

5. Never Reviewing Your Tariff Again

Many expats set up their utilities when they move in… and then never look at them again.

But in Spain:

• Prices change

• Better tariffs become available

• Your usage patterns evolve

If you haven’t reviewed your bill in the last 12 months, there’s a strong chance you’re no longer on the best deal.

This is one of the biggest reasons people end up overpaying long-term.

How Compare The Mercado Can Help

At Compare The Mercado, we specialise in helping expats across Spain:

• Understand their electricity bills

• Identify hidden overpayments

• Switch to better tariffs

• Optimise potencia and usage

The best part?We handle the entire process for you.

No stress. No admin. No hassle.

Final Thoughts

Moving to Spain should be about enjoying your new lifestyle — not worrying about confusing bills or overpaying for electricity.

Avoiding these common mistakes can save you hundreds of euros per year and give you peace of mind that everything is set up correctly.

FAQ

Can I switch electricity provider in Spain if I’m renting?

Yes — as long as the contract is in your name, you can switch providers without needing the landlord’s permission.

Will switching provider cause any disruption?

No — your electricity supply continues as normal with no interruptions.

How much can I save by switching?

It depends on your current tariff, but many clients save between €200–€500 per year for each utility service they switch.

Do I need to contact my current provider?

No — the switch is handled for you as part of the process.