Gross Rent Multiplier Calculator
Enter property price and monthly rent below to instantly get the gross rent multiplier.
What Is GRM?
Gross Rent Multiplier (GRM) is Property Price ÷ Annual Gross Rent -- a fast, back-of-envelope screening number that skips expenses entirely, useful for quickly comparing many listings before spending time on a full expense breakdown.
Worked example
A $400,000 property rents for $4,000/month.
GRM = $400,000 ÷ ($4,000 × 12) = 8.33
A $300,000 property renting for $2,500/month:
GRM = $300,000 ÷ ($2,500 × 12) = 10.00 -- the higher GRM means slower gross payback from rent than the first property, before any expenses are even considered.
Common mistake
Using GRM alone to make a final buy decision. Two properties with an identical GRM can have very different real cash flow once property tax, insurance, and maintenance are counted -- GRM is a screening filter, not a substitute for a real NOI and cap rate check.
Keep going
- GRM and rental yield both compare price to rent, just inverted -- the rental yield calculator expresses the same relationship as a percentage instead of a multiplier. Rental Yield Calculator
- GRM and the 1% rule are both quick screening tools that skip a full expense breakdown; the 1% rule calculator applies an even faster version using monthly rent directly. 1% Rule Calculator
Frequently Asked Questions
What does GRM actually mean?
Gross Rent Multiplier is how many years of gross rent it would take to equal the property's price, ignoring every expense. A GRM of 8 means the price is 8 times the annual gross rent.
Is a lower GRM always better?
Generally a lower GRM means a faster gross payback from rent, but GRM ignores expenses entirely -- two properties with the same GRM can have very different real cash flow if their expense ratios differ. It's a first-pass screening number, not a final answer.
How does GRM relate to cap rate?
GRM uses gross rent and price; cap rate uses NOI and value. GRM is faster to calculate from a listing (which usually states gross rent) but less precise, since it ignores the real expense differences that cap rate accounts for through NOI.
What's a typical GRM range?
It varies a great deal by market -- there's no single universal "good" GRM the way there's no single universal cap rate. A meaningful GRM comparison is between similar properties in the same local market, not against a fixed number.
Can I use monthly rent instead of annual?
This calculator takes monthly rent and multiplies by 12 internally to get the standard annual-gross-rent basis GRM is defined against -- you don't need to do that conversion yourself.
This is a neutral calculation based on the numbers you enter -- not investment advice.
Related Calculators
- 1% Rule Calculator — Quick Screening
- Vacancy Rate Calculator — Quick Screening
- Cap Rate Calculator — Return Metrics
- NOI Calculator — Income & Cash Flow