Posted: Wed Apr 19, 2023 6:40pm
As a tax resident in Spain, you are taxed on your worldwide income, including any rental income you receive from tenanted UK property.
If you haven't disconnected from the UK tax system and still pay tax there, you will have the opportunity to list on your Spanish tax return any UK tax you have paid. This will be taken into account when assessing your Spanish tax liability.
Personally, I found it easier to disconnect from the UK tax system after year one and I only pay tax in Spain, even though all my pensions and investment income arises in the UK. It's easier, and I want the country I live in and benefit from to receive my tax contribution.