It depends on how you operate. Standard residential lets are taxed as Case V rental income. Short-term lets with additional services such as cleaning between guests, linen changes, and active management may be treated as Case I trading income by Revenue.

The classification is based on the facts, not your preference. A single Airbnb property with basic services often sits in a grey area; multiple properties with professional management are more likely to be Case I. Revenue's determination affects both which expenses you can deduct and your PRSI obligations.