Change of use of property from main residence to commercial letting
You will get a relief in your income tax assessment for interest paid on a loan taken out to buy your main residence. Subject to the conditions laid out in Article 90AA of the legislation.
If a property is brought to be let commercially, relief for interest paid on that loan will be granted under Article 90AB.
If you move out of your main residence then let it on a commercial basis, the interest paid on the loan to purchase the residence does not fall within the specific provisions of Article 90AB Relief in respect of interest payments: commercial letting.
However the Taxes Office's practice is to allow relief for the interest paid on a loan that was previously allowable within Article 90AA, as if it now qualifies under Article 90AB, subject to the restrictions that apply within Article 90AB.
Article 90AA - Income Tax (Jersey) Law 1961 on Jersey Law website