Thank you for taking the time to reply. Let me clarify a bit. My husband, myself, and a roommate rent the home from a landlord. We split the cost of rent by bedroom. My husband and I pay for 2 bedrooms, one is our bedroom, and one is my office. Therefore, the office space costs me $400 a month. My husband and I pay all utilities. I calculated the utilities of the office space by deducting my roommates bedroom and bathroom from the square footage of the home (the parts I do not use at all). I listed the cost of the office as $400, not a percentage of the space it occupies in the home. I would not be paying the extra $400 for the office, if I did not need it, so that is what it cost to rent that space. I am basically asking if this is an accurate way to deduct, since it actually mirrors the cost, or if I have to use the percentage, even though that does not represent the actual cost. This is just for the physical room. I have calculated all other home office costs, such as utilities, by percentage of square footage.
