Audit proof Airbnb deductibles

[tdo061803]

I run Airbnb and write off expenses for Airbnb business.

How do I protect myself during the audit with supplies deductible so that I do not seem as mixing personal into business expenses?

For example, guests and I both use toilet paper. I think I should best estimate and write off a part of the cost of the toilet paper. If I ever get audited, which I heard I need to prove I am not guilty, how do I prove that? Do I need to provide the total cost of toilet paper that year and show the write-off is a percentage of that?

Thank you!

[AnnetteB6 · Accepted solution]

Your approach to calculating the shared supplies expense is a good one.  If it were questioned, you would need to be able to show somehow that you actually spent more for that 'supply' than you were claiming as a rental expense.  You would also need to be able to explain how you arrived at the percentage that was used for the rental expense.  

@tdo061803