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    Gross Rent Multiplier (GRM) Calculator

    Calculate the gross rent multiplier on any rental property from price and gross annual rent. Learn the GRM formula and how investors use it to screen deals.

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    Gross Rent Multiplier (Annual)

    8.00

    Monthly Rent Convention

    96.0

    Lower GRM means you are paying less for each dollar of gross rent. Because GRM ignores operating expenses, use it as a first screen, then confirm the deal with NOI based metrics like cap rate and DSCR before you commit.

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    What is the Gross Rent Multiplier?

    The gross rent multiplier is the ratio of a property's price to its gross annual rental income. It answers a simple question: how many years of gross rent does the purchase price represent? Investors use it to screen rental properties quickly because it needs only two numbers, the asking price and the scheduled rents, both of which are usually available before any expense detail.

    The GRM Formula, with a Worked Example

    GRM equals property price divided by gross annual rent. A fourplex priced at $1,200,000 that collects $150,000 in total scheduled annual rent has a GRM of 8.0. Run the same math on comparable properties in the same market and the outliers show up immediately. A property at a GRM of 6.5 in a market where similar buildings trade at 9 is either a bargain or hiding a problem, and either way it deserves a closer look. You can also flip the formula to estimate value: gross annual rent multiplied by the market GRM gives an implied price.

    Where GRM Falls Short

    GRM ignores everything below the gross rent line: vacancy, taxes, insurance, utilities, management, and maintenance. Two properties with identical GRMs can produce very different cash flow if one carries a heavier expense load. That is why lenders do not underwrite to GRM. They size loans on net operating income and debt service coverage. Use GRM to decide which deals are worth analyzing, then confirm with our cap rate and DSCR calculators before you make an offer.

    Frequently Asked Questions

    The gross rent multiplier, or GRM, is the ratio of a property's price to its gross annual rental income. It is a quick screening metric investors use to compare rental properties before digging into expenses. A property priced at $1,200,000 with $150,000 in gross annual rents has a GRM of 8.0.

    Divide the property price by the gross annual rental income. The calculator above does this for you. Gross rent means total scheduled rental income before vacancy, operating expenses, and debt payments are subtracted.

    It depends on the market and property type. Lower GRM generally means you are paying less for each dollar of rent, and many investors screen for properties with a GRM below the local average. Compare the GRM against similar properties in the same market rather than a single national number.

    The standard commercial convention uses gross annual rent. Some residential investors use monthly rent, which produces a number 12 times larger. Either works for comparison as long as you use the same convention for every property you compare.

    GRM uses gross rental income and ignores operating expenses, so it is a rough screen. Cap rate uses net operating income, which accounts for expenses, so it is a more complete measure of return. Two properties with the same GRM can have very different cap rates if their expense loads differ.

    Multiply the gross annual rent by the market GRM for comparable properties. If similar buildings trade at a GRM of 9 and your target property collects $120,000 in gross annual rent, that implies a value around $1,080,000. For an income based value that accounts for expenses, use our property value calculator.