Gross rent multiplier is the quick screen I use to sort deals before I do any real underwriting, and this free calculator runs it instantly. Enter the price and the gross annual rent, and you get the GRM.
GRM is deliberately rough. It ignores expenses and financing and just asks how many years of gross rent it would take to pay for the property. That makes it a fast first filter, not a final answer. Here is the tool, then how to use it without getting burned.
GRM, in one line: gross rent multiplier is the price divided by the gross annual rent. A lower GRM generally means a cheaper property relative to its rent.
Use it as a filter: GRM is a fast screening tool because it ignores expenses. Once a deal passes the GRM screen, move to cap rate and NOI for the real analysis.
The Gross Rent Multiplier Formula
The formula is GRM = price ÷ gross annual rent. If a property is priced at $1,000,000 and produces $125,000 in gross annual rent, the GRM is 8. Flip it around and you can estimate value: multiply the gross rent by a market GRM to get a rough price.
Because GRM uses gross rent and not NOI, it says nothing about expenses. Two buildings can have the same GRM while one is far more profitable because it runs leaner. That is exactly why GRM is a screen and not a decision.
How to Use GRM the Right Way
I use GRM to compare similar properties in the same market quickly. If everything is trading around a GRM of 8 and one deal is at 6, that is worth a closer look, and if one is at 12, I want to know why. But I never buy on GRM alone, because it ignores the expense side entirely. Once a deal clears the screen, I move straight to the cap rate and a full NOI. GRM is one of several ways to value a property, which I walk through here.
Watch: How to Value Commercial Real Estate [The 4 Main Ways]
Gross Rent Multiplier FAQ
How do you calculate gross rent multiplier?
Divide the price by the gross annual rent. A $1,000,000 property with $125,000 in gross annual rent has a GRM of 8.
What is a good gross rent multiplier?
It is relative to the market, but a lower GRM generally means a better price relative to rent. Compare a property's GRM to similar deals in the same area rather than to a fixed benchmark.
What is the difference between GRM and cap rate?
GRM uses gross rent and ignores expenses, so it is a fast screen. Cap rate uses net operating income after expenses, so it is a more accurate measure of a property's return.
Can GRM estimate value?
Yes, roughly. Multiply the property's gross annual rent by a market GRM to get a ballpark value, then confirm with a full cap rate and NOI analysis.
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Explore CRE CentralAfter GRM screens a deal in, confirm it with the cap rate calculator and the NOI calculator. See all the commercial calculators.