Cash flow equals income minus expenses. How hard can it be? Novice investors who have not reviewed how to calculate rental property cash flow could be in for an unpleasant surprise when anticipated income doesn’t cover anticipated (and perhaps unanticipated) expenses. The point of investing in real estate is to generate positive cash flow—money left over after paying the expenses related to owning and operating the property. If the expenses exceed the gross income, the property has a negative cash flow. Simply put, positive cash flow means the investor is making money, while negative cash flow means the investor is losing money.
The income from a rental property is the total rent, plus any fees or revenue from things like application fees, late fees, or pet fees.
The trickier part is calculating (or estimating) expenses. Some investors calculate the operating expenses without including the cost of financing—but financing is a real expense, so mortgage payments and PMI should still be deducted from income along with, or after, accounting for all other expenses, to get an accurate picture of cash flow.
In addition to the mortgage and mortgage insurance payments, a calculation of cash flow should reflect expenses for: