50% rule and 2% rule

[Sean Schellenger]

When we build new homes or do a major renovation to an existing structure in the city of philadelphia, we are able to get a ten year tax abatement. I am trying to figure out how much of that 50% goes towards taxes for most investors. I know it varies depending on the area....

Im looking for feedback from those who use the 50% and 2% rule. Should I be adjusting the number's slightly based on the fact that my tax expense is 0? If so, who much??