Non resident income tax on holiday lets

I tried using my UK accountant, he was useless.

Use an English speaking Spanish account, they know the law better than anyone else.

www.abacoadvisors.com

You are not talking to the correct UK accountant, the facts are below, there is a dual tax agreement yes the facts are below,   

https://cannonchambers.co.uk/resources/blog/tax-on-overseas-property/

On the Spanish side I suggest using Taxadora to pay their tax due.    https://taxadora.com/

The guy who runs it can help with dual taxation https://www.linkedin.com/company/taxadora

Vilho Heiskanen the owner will answer your questions very rapidly by E Mail.  He is excellent see his CV below.    

 https://es.linkedin.com/in/vilho-heiskanen-13273613?original_referer=https%3A%2F%2Fwww.google.com%2F                  

I've been using Abaco Advisors for a long time.

They were founded in 1999.

Their charges are very reasonable.

You are better no declaring your holiday home in Spain 

It gets complicated 

I am from the uk and have the same  as yourself l only declare in the uk rental and the Spanish holiday home in Spain 

The decision is yours have a good day

I know many people who have a property in Spain and rent it out, some for the odd week or two to friends/family, etc, and some who rent out a lot more as a steady income to pay the costs.

Very few, if any, get involved with declaring this income, not because they want to cheat the system but because it is an awful lot of hassle, unlike owning a caravan in the UK and renting it out to cover the ground rental, etc. Where most people would not dream of declaring it.

If you are renting to friends, family etc, I would probably just stay under the radar, if you are renting it, and openly advertising it to the general public, you may be better to go along the official channels to avoid major problems with the Spanish tax office.