Price ÷ gross annual rent — the fastest screen there is, with the cap-rate cross-check GRM leaves out.
The fastest screen there is — price relative to gross rent, computable from a listing before you have expenses. Required: price and gross annual rent. Optional: an operating-expense ratio to cross-check the implied cap rate, which GRM ignores.
Gross Rent Multiplier
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low (cheap)typicalelevated
Enter price and gross annual rent to see the GRM — the fast screen before you have an expense breakdown.
GRM = purchase price ÷ gross annual rent. It's a back-of-the-envelope screen for quick triage — lower is cheaper relative to gross rent. Its weakness is that it ignores operating expenses, vacancy, and capital costs, so two buildings with the same GRM can have very different real yields. Treat it as a first filter, then confirm with the cap rate on actual NOI. There's no universal "good" GRM — it's market- and asset-specific. The full UpsideIQ underwrite builds NOI from the rent roll up.
Pre-filled with a worked example — edit any field to run your own deal.
Built by LFO Capital's institutional CRE underwriting team · computed, not guessed — deterministic math, not an AI estimate · how we calculate →
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What the gross rent multiplier measures
The gross rent multiplier is the simplest valuation ratio in real estate: purchase price divided by gross annual rent. A $2,000,000 building renting for $250,000 a year carries a GRM of 8.0. Its entire appeal is speed — you can compute it from a listing in seconds, before you have an expense breakdown, a rent roll, or a T-12. It's the number you use to triage a stack of deals down to the few worth a real underwrite.
The formula
GRM = purchase price ÷ gross annual rent. Gross rent is the top-line collected (or potential) rent, before any expenses. A lower GRM means you're paying less per dollar of gross rent, which usually — but not always — means a higher yield. Run it in reverse to value a property: multiply the gross rent by a market GRM to get a quick price. At a market GRM of 8, a building with $300,000 of gross rent is worth roughly $2,400,000 as a first pass.
GRM vs cap rate — the cross-check that matters
GRM's speed is exactly its weakness: it uses gross rent, so it completely ignores operating expenses, vacancy, and capital costs. Two buildings with an identical GRM of 8 can have very different real yields if one runs a 35% expense ratio and the other 55%. That's why GRM is a screen, not a verdict. The moment you have an expense estimate, switch to the cap rate, which is built on actual NOI. A useful tell: a GRM that looks cheap paired with a cap rate that looks thin almost always means a heavy expense load. The calculator above will show the implied cap rate the moment you add an operating-expense ratio, so you can see the gap between the gross screen and the real yield.
What is a good GRM?
There's no universal answer, because GRM is entirely market- and asset-specific — a GRM that's a bargain in a high-expense, high-tax market is full price in a low-cost one, and small residential trades at very different multipliers than larger commercial. Compare a deal's GRM only to recent sales of similar properties in the same submarket, never to a national rule of thumb. And whatever the GRM says, confirm it against the cap rate before you act: the multiplier gets you to the shortlist; NOI gets you to a decision. Treat any GRM in isolation as a hypothesis, not a value.
The gross rent multiplier (GRM) is purchase price divided by gross annual rent — a fast screening ratio for income property. A $2,000,000 building renting for $250,000 a year has a GRM of 8.0. Because it uses gross rent, you can compute it from a listing before you have an expense breakdown.
What is a good GRM?
There is no universal number — GRM is market- and asset-specific. A GRM that's cheap in a high-expense, high-tax market is full price in a low-cost one. Compare a deal's GRM only to recent sales of similar properties in the same submarket, and always confirm it against the cap rate on real NOI.
What is the difference between GRM and cap rate?
GRM uses gross rent and ignores expenses; the cap rate uses net operating income (NOI) after expenses. GRM is a fast first screen; the cap rate is the real yield measure. Two properties with the same GRM can have very different cap rates if their expense loads differ — so use GRM to triage and the cap rate to decide.
How do you calculate GRM?
GRM = purchase price ÷ gross annual rent. For example, a $2,400,000 property with $300,000 of gross annual rent has a GRM of 8.0. To estimate value, multiply the gross rent by a market GRM drawn from comparable sales.
Why is GRM considered a weak metric?
Because it ignores operating expenses, vacancy, and capital costs entirely. A low GRM can hide a high expense load that makes the real yield thin. It's a legitimate fast screen for triage, but it should never replace a cap rate built on actual NOI when you're making a decision.