The residence and work permit process is independent of the Tax regulations and its authorities. If you stay in Spain for at least 183 days in a year, you will become a tax resident.   However, many countries have signed a Double Taxation Agreement with Spain to avoid charging additional taxes. We will need to understand how the tax authorities will treat this income and the general requirements for worldwide income in Spain.   Our Tax colleagues can provide more accurate information, percentages and amounts regarding your tax status. They can also prepare an estimate to help you clarify your obligations once you reside in Spain.