Gross Rent Multiplier (GRM): Formula, Example, and What Counts as Good
Learn the gross rent multiplier formula, how to calculate GRM, what a good GRM looks like by market, and how GRM compares to cap rate.
Last reviewed: 2026 · 7 min read
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What Gross Rent Multiplier Measures
Gross rent multiplier compares a property’s price to its gross annual rent. It answers a simple question: how many years of gross rent equal the purchase price?
Because it uses gross rent instead of net income, GRM is faster to calculate than cap rate but also blinder. Two properties with identical GRMs can have very different expenses and very different real returns.
GRM Formula
GRM = Purchase Price / Gross Annual Rent
A $300,000 property collecting $2,500 per month has gross annual rent of $30,000 and a GRM of 10. A competing property at $280,000 with $2,600 rent has a GRM of about 9, which is the stronger rent-to-price ratio.
You can also invert the formula to estimate value: a property collecting $28,000 per year in a market where similar rentals trade at a GRM of 9 implies a value around $252,000.
What Is a Good GRM?
Lower is better for the buyer, because it means less price per dollar of rent. Many investors treat a GRM between 4 and 7 as attractive, but the realistic range is market-dependent: expensive urban markets commonly trade at GRMs of 8 to 12 or higher, while smaller cash flow markets can trade at 6 to 8.
The only meaningful comparison is against similar properties in the same market. A GRM of 9 can be excellent in one metro and poor in another.
GRM vs Cap Rate
- GRM uses gross rent; cap rate uses net operating income after expenses.
- GRM ignores taxes, insurance, vacancy, and repairs; cap rate captures all of them.
- GRM is best for fast screening across many listings; cap rate is better for the actual decision.
- A low GRM with high expenses can be worse than a higher GRM with low expenses, and only NOI-based metrics reveal that.
How to Use GRM in Practice
Use GRM to rank a batch of listings in the same market, then run the top candidates through a full analysis with real expenses, financing, and reserves. If two finalists remain close, compare them side by side on cash flow, cap rate, cash-on-cash return, DSCR, and GRM together rather than crowning either metric alone.
Frequently Asked Questions
Is a higher or lower GRM better?
Lower is better for a buyer. A lower GRM means you pay fewer years of gross rent for the property. Sellers benefit from higher GRMs.
Why do investors use GRM if cap rate is more accurate?
Speed. GRM needs only price and rent, which every listing provides, so it works as a first-pass filter when expense data is not yet available.
Does GRM use monthly or annual rent?
The standard GRM uses gross annual rent. Some investors quote a monthly version, so always confirm which basis a quoted multiplier uses before comparing.
Educational Disclaimer
All calculations are estimates for educational and planning purposes only. PropertyFlowTools.com does not provide financial, tax, legal, lending, or investment advice. Verify calculations and consult qualified professionals before making property or financing decisions.