Posted: Mon Dec 14, 2020 9:57pm
Assuming you are UK Citizens without Irish passports ...
Do I need an NIE number to rent? - Probably not as your rental will be short, but you should ask this question of your proposed rental agent. Initially, you will just be on holiday
Are there any short term lets for about 6 months or are they long term ? - You cannot come for 6 months. You are constrained to 90 days in any rolling 180 .... so after 3 months, you must go home (unless/until you gain Residency - your TIE).
Is it correct we can stay for 90 days before we need the relevant documents and private insurance? - No. Your EHIC will invalid after 31/12/20. You need travel insurance.
To gain Residency (TIE) you need to buy a home or have a long-term lease (either of which definitely needs a NIE).
So ... come for (up to) 3 months, find a home to buy or lease (long term), then your Spanish Solicitor will start the ball rolling on NIE, bank account, Residency etc. You will need to return home after 3 months, and this can carry on in your absence.
"Residency" confers the right to stay indefinitely (there are some caveats around that statement, but your solicitor will give you the necessary advice).
Before you spend any money/make any plans you must be aware that to gain Residency, you need to demonstrate that you will not be a burden to Spain, and that (a) healthcare and (b) income are tested.
(a) neither of you will qualify for free healthcare. You will need to pay for private healthcare (assuming no serious pre-existing conditions, initially around 2500 Euros per year for the two of you)
(b) after 31/12/20, the UK is like any other 3rd nation, and the financial hurdles for Residency are set to increase significantly. The absolute figures do not seem to have been published, but people are speculating that an income of 32K Euros/year is needed for a couple, or a significant bank balance.
Spanish Residency means that you will be liable for income tax in Spain. This is generally higher than in the UK. Get professional advice on this before committing.