The simple answer to this question is: NO. Although a NIE Number is refered to as a tax number sometimes, applying/having a NIE Number does not automatically mean you should or have to pay tax in Spain.
Tax in spain can be a complicated issue because if you fail to make a declaration or don’t pay the correct amount you can end up with a severe fine. The Spanish government frequently change their tax regulations, which makes if very difficult for both residents and non residents to keep up to date.
The key points when thinking about tax matters in spain are:
- The Spanish tax year runs from January to December.
- In spain both residents and non residents are required to pay tax.