Gross Rent Multiplier to Value Calculator
Estimate a rental property’s value from its gross rent using a market gross rent multiplier (GRM) — a fast first-pass screen.
How it works
Value = GRM × gross annual rent · Gross annual rent = monthly rent × 12 · Implied gross yield = 1 ÷ GRM
The gross rent multiplier is the crudest of the income approaches: it multiplies a property’s gross annual rent by a factor drawn from comparable sales, ignoring expenses entirely. That makes it a quick screening tool for comparing listings, not a precise valuation — two buildings with identical rents but very different tax and maintenance costs would share a GRM value yet be worth different amounts. Use it to shortlist, then confirm with cap rate and NOI.
Worked example
A fourplex renting for $5,000/mo has $60,000 in gross annual rent. At a market GRM of 8, its estimated value is 8 × 60,000 = $480,000, implying a gross yield of 1 ÷ 8 = 12.5% before any expenses.
Frequently asked questions
Is GRM based on gross or net rent?
Gross — total scheduled rent before any expenses or vacancy. That simplicity is its whole point and its weakness: it says nothing about how much of that rent survives after costs.
How is GRM different from cap rate?
GRM uses gross income and ignores expenses; cap rate uses net operating income after expenses. Cap rate is the more reliable valuation; GRM is a faster first-pass filter when you only know the rents.
What is a good GRM?
It is market-specific — often 4–7 in higher-yield markets and 10+ in expensive coastal ones. Lower means cheaper relative to rent. Always derive it from recent comparable sales in the same area rather than a rule of thumb.
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Educational estimate, not financial, tax or lending advice. Confirm figures with your lender, agent or a qualified professional.