British citizens / UK nationals now have to follow the same process as other non-EU national citizens of third countries to get Spanish residency, i.e. first obtain a visa.
The minimum income required for a British Citizen / UK national to obtain a residency visa, is a lot higher than it was to get residency before Brexit. In most cases a single applicant needs to have at least €28k per year, whereas previously less than €7k income would have been sufficient.
You also have to obtain a police criminal check report, and medical certificates are also required for most visa applications.
The Spanish Digital Nomad Visa is now available following the passing of the new Startups Law, ‘Ley de Startups‘. This visa which allows the holder to live in Spain and work remotely or online, can be applied directly in Spain, or via the Spanish Consulate in the country in which you currently reside.
To get a Spanish Digital Nomad Visa, applicants must have sufficient funds to support themselves, proof they can work remotely from Spain, and must already have been working in their current ‘remote worker’ employment or self-employment prior to applying.
Holders of the Spanish Digital Nomad Visa are eligible for a special income tax rate fixed at 24% for the first 5 years, offering higher earners reduced income tax compared to normal residents.