Real Estate Math – Do You Know These Simple Formulas?

Real Estate Math – Do You Know These Simple Formulas?

How much real estate math do you need to know if you are investing in real estate? There are computers and calculators for calculating interest rates or amortizing loans. What you need to know is a few simple formulas for determining if a property is a good investment or not.

The Real Estate Math You Don’t Need

The gross rent multiplier is one formula you don’t need. I bring it up because people are sometimes still using it, and there are better ways to estimate value. A gross rent multiplier is a crude way to put a value on a property. You decide that properties are worth 10 times annual rent or less, for example, and simply multiply the gross annual rent a building collects by ten to get your value.

There are obvious problems with this formula. You need to constantly change it to reflect interest rates, because a property might be profitable at 12 times rent when interest rates are low, but a money loser at eight times rent if the financing is expensive. Also, there are just plain different expenses for different properties, especially when some include utilities in the...