The 10-Second Screen Before You Tour Anything
Two rental properties cross your desk, both listed at $300,000. The first collects $3,000 a month in rent. The second collects $2,000 a month. Same price, but they are not the same deal, and one number tells you that before you schedule a single showing. The Gross Rent Multiplier (GRM) on the first is 8.3. On the second, it's 12.5. Lower is better, so property one is generating income far faster relative to its price.
Here's the math, and it's deliberately simple. GRM is the property price divided by its annual gross rental income:
- Property 1: $300,000 ÷ $36,000 annual rent = GRM of 8.3
- Property 2: $300,000 ÷ $24,000 annual rent = GRM of 12.5
A GRM of 8.3 means the property's price equals about 8.3 years of gross rent. That's the entire point: GRM is a speed-of-screening tool. It lets you rank a dozen listings in minutes and throw out the obvious losers before you waste an afternoon touring them. Most investors look for a GRM in the 4 to 7 range in affordable markets, and accept higher numbers, often 8 to 12, in expensive metros where prices outpace rents.
What GRM is not is a measure of profit. It uses gross rent, before taxes, insurance, maintenance, vacancy, and management. A property with a great GRM can still bleed cash if its operating costs are sky-high or it sits vacant three months a year. GRM tells you whether a deal is worth a closer look, not whether it will make money. That closer look means running cap rate and cash flow with real expenses.
Use GRM the way a savvy investor does: as the first filter, not the final answer. Enter a property's price and its monthly or annual rent above, and this calculator returns the GRM instantly, so you can compare listings on equal footing and spend your time only on the deals that earn it.