Posted: Wed Sep 13, 2017 4:28am
To try and make things crystal clear:
As a non-resident, you submit an annual tax return and pay a small amount of tax based on the land registry value of your property.
If you become resident, then you pay tax in Spain on all of your income, unless you have a pension arising from what is classed as government employment in the UK (armed forces, civil service, etc). Any tax paid in the UK can be offset against the tax due in Spain.
If you own property in Spain, it's better to own it in joint names to ease any inheritance tax liability.
If you're non-resident, then inheritance tax is due only on assets held in Spain.
If you're resident, then inheritance tax is due on assets held in both Spain and the UK. The dual-taxation treaty does not cover inheritance tax. In Valencia, subject to certain qualifying criteria, there's relief on almost all inheritance tax between close family members.
I agree with Jan - if you can afford to, keep a bolt hole in the UK. I can't fault the Spanish health system, but it doesn't cover long-term caring.