You should normally apply to the Instituto Nacional de la Seguridad Social (INSS), but only if you have worked in Spain at some point. The INSS will then inform the UK that you have claimed and you will not have to make a second application to the UK. In other circumstances claimants:

- living in Spain but who have never worked here: apply through the UK;
- living in UK and have worked in UK and Spain: apply through the UK;
- living in Spain, have worked in UK and Spain: apply through Spain;
- living in Spain and who have worked in Spain and more than one other EU country: apply through Spain.

On the application form you’ll be able to include time spent working in other countries. Where you apply will not affect the amount of pension you receive. The Spanish pension claim form can be collected from any INSS office and online.