What is a CUPS number and why it matters

What does CUPS mean

CUPS stands for Código Universal de Punto de Suministro.

It is a unique identifier assigned to your electricity supply point, not to you as a customer.

Think of it as an ID number for your property’s electricity connection.

What a CUPS number is used for

The CUPS number allows electricity suppliers to:

• Identify your exact supply point
• Access technical details about your connection
• Process a supplier change correctly
• Avoid errors when switching tariffs

It stays the same even if you change electricity companies.

Where to find your CUPS number

You can usually find your CUPS number:

• Near the top of your electricity bill
• In the contract details section
• Labelled clearly as “CUPS” followed by letters and numbers

It often starts with “ES”.

Is it safe to share your CUPS number

Yes. Sharing your CUPS number is normal and required to switch suppliers.

It does not give access to your bank details or allow changes without your approval.

What happens if your CUPS number is wrong

If the CUPS number is incorrect or missing, switching can be delayed or rejected.

That is why uploading your electricity bill is the easiest way to ensure the correct information is used.