50% is a perfect screen test and is easy to do in your head. It is generally closer to 45% if you include management, capex set-asides, maintenance, economic vacancy, etc.
Not true. It is in the range of 45% to 50% - NOT generally closer to 45%. Furthermore, cities and states are broke all over the USA and are seeking to correct this problem with new taxes and fees. For example, there is a new 3.8% Medicare tax on unearned income - from the new Obamacare (healthcare) law. This is just ONE of a myriad of new taxes and fees that may/will affect rental property owners. In my opinion, the 50% Rule could certainly become the 55% Rule in the near future as the government attempts to cover our massive debt.
In my market, one of the few I've found you can get cash out each month, here's my basic formula:
Total rents
-30% for Maintenance and Vacancy
-10% for management (even if I'm doing it, it has value)
-$100/month profit PER UNIT
If your maintenance and vacancy expenses are 30% - YOU'VE GOT A PROBLEM!
More importantly, you've only accounted for THREE of the expenses (maintenance, vacancy, and management). What about taxes, insurance, legal fees, utilities (if only during vacancies), entity maintenance, evictions, lawsuits, capital expenses, etc, etc, etc???