Gross Rent Multiplier Calculator

GRM = purchase price divided by annual gross rent. A $400,000 property that rents for $30,000/year has a GRM of 13.3. A lower GRM means the property pays for itself faster in gross rent terms. It is a quick way to compare relative value across properties before digging into the full income-and-expense analysis, and it works in any market where you have comparable rental data.

It depends heavily on the market. A GRM of 4-7 is excellent and typical of value or Midwest cash-flow markets. A GRM of 8-12 is average and common in mid-tier cities. A GRM above 15 indicates low rental yield relative to price and is common in high-demand coastal markets where investors accept lower income returns in exchange for appreciation. Always compare a property's GRM to similar local comps, not a national benchmark.

GRM uses gross rent (before any expenses), making it fast to calculate but imprecise. Cap rate uses net operating income (gross rent minus vacancy, taxes, insurance, management, maintenance), so it reflects actual profitability. Both are useful: GRM for quick screening across many properties; cap rate for the serious analysis of shortlisted deals. A property with a great GRM can still have a poor cap rate if expenses are high.

Multiply your target GRM by the annual gross rent to get a maximum price. If comparable properties in the market trade at a GRM of 10 and your target property rents for $24,000/year, the implied fair price is $240,000. This lets you quickly tell whether a listed price is reasonable or a seller is expecting too much of a premium relative to the income the property actually produces.