For the purposes of the Scottish Government’s new Income Tax powers under the Scotland Act 2012, any person who is resident in the UK for Income Tax purposes will be regarded as a Scottish Taxpayer (and therefore subject to the Scottish rates of Income Tax) if he or she meets any one of the following tests:
His or her only or main home, or 'place of residence' , is in Scotland;
He or she has no home in the UK but spends more days of the year in Scotland than in any other part of the UK; or
He or she is an MP, MSP or MEP for a Scottish Constituency.
If a person is not regarded as a Scottish Taxpayer, he or she will pay Income Tax at the UK rates rather than at the Scottish rates.
The Scottish rates of income tax , and higher rate Scottish taxes (SRIT) will apply from 6 April 2016.