Posted: Thu Aug 11, 2022 9:36am
Engage a tax assessor or gestor. Better still, get tax advice (in Spain) before committing to your NLV, as the income tax-take can be significantly higher in Spain than in the UK).
If you hold legal Spanish Residency, all your worldwide income is taxed in Spain, and you can withdraw from the income tax system in your home country.
You become liable for income tax as follows:
If your Residency (the TIE after your NLV) is granted Jan-June in year X, you are tax-resident wef 1st Jan year X.
If your Residency is granted July-Dec in year X, you are tax-resident wef 1st Jan year X+1.
Income tax is collected a year in arrears. You declare in June the year following your tax-Residency. You pay in two chunks ... July and November.
Once you have made the first payment, you can apply to the Spanish tax authorities for a certificate of tax compliance. You can then send this to your home country to start the process of withdrawing from income tax there.
You will pay tax in both countries for a period until HMRC "zero-rates" you, and returns your double payment. Beware ... the double taxation period can be long. My wife and I paid double tax for 2 years (the admin was Covid-delayed).
If you sell your UK home AFTER you gave gained legal Residency in Spain (your TIE) you can no longer argue that is it your primary residence; HMRC could demand CGT. If you sell it AFTER you become a Spanish tax-Resident, you will pay CGT in the UK and in Spain (the process works such that you pay the UK first, then this sum is deducted from the demand made by Spain, so in effect you pay the amount demanded by Spain, where the tax is higher).