Both my wife and me have self employed home offices, one upstairs and one downstairs, should i double the squre footage to calculate expenses

[dirkordze]

we both have offices, one upstairs and one downstairs, can I use the main floor square footage to calculate the percentage for each office or double it to include both floors

[Delphision · Accepted solution]

You would use the square footage of the whole house, and then each one would use the square footage of his/her office space.