calculating taxes for cash flow

[Steve Kirsch]

Aloha BP family. When calculating cash flow on a prospect, since the rent revenue coming in is taxable, would I need to estimate with higher percentages for an expense than what is presumed? For example if I want to use 10% for vacancy, 10% for CAPEX, etc... should I actually use say 12% instead since 10% isn't accurate due to the revenue incoming is considered taxable? Thnx, Steve