I have a similar situation, but I rent out a garage apartment which is next to my house. The internet service and TV streaming service is shared between both the house and the garage apartment. I use both services every day. Renters use both services when the garage apartment is occupied. My question is how do I calculate how much cost for each service to allocate to the rental (i.e., deduct from my taxes). Certainly both services are not fully deductible since I use them for personal use too.
