It depends on whether your income is classified as Case V or Case I.

Under Case V (rental income), allowable expenses include repairs, insurance, management fees, accountancy fees, advertising, and wear-and-tear on furnishings at 12.5% per year over 8 years. Mortgage interest is deductible only if the property is registered with the RTB.

Under Case I (trading income), you can also deduct cleaning and laundry costs, platform commission fees, toiletries and welcome packs, staff wages, telephone and broadband, professional photography, and proportionate motor expenses. Trading expense relief is significantly broader.