What Is Gross Rent Multiplier? The Fastest Screen in Rental Investing
Gross rent multiplier is purchase price divided by annual gross rent. What it tells you, what it skips, a worked example, how it maps to cap rate, and when it is the right tool.
By the GRMCalculator.com team · Published September 5, 2026
Gross rent multiplier is purchase price divided by annual gross rent. A $300,000 house that rents for $2,500 a month collects $30,000 a year and has a GRM of 10. Read it as “ten years of rent to equal the price.”
It is the quickest way to compare rental listings, and the most misused, because it ignores every expense.
The formula
GRM = purchase price / annual gross rent
Gross rent is the scheduled rent at full occupancy, before vacancy and before any expense. If the property has other income, such as parking or laundry, most investors include it. The GRM formula guide covers the details and the monthly variant.
A worked example
Three listings in the same town:
| Property | Price | Monthly rent | Annual rent | GRM |
|---|---|---|---|---|
| House A | $300,000 | $2,500 | $30,000 | 10.0 |
| House B | $240,000 | $2,300 | $27,600 | 8.7 |
| Duplex C | $380,000 | $3,300 | $39,600 | 9.6 |
House B produces the most rent per dollar of price. Duplex C is second, House A third. That ranking took a minute, and in a market where the three properties have similar taxes, insurance and condition, it will match the ranking by cap rate closely.
What GRM tells you
Relative price. Among similar properties, a lower GRM is a cheaper property per dollar of rent. Sorting a list of listings by GRM puts the best-priced ones on top.
Market level. Markets have characteristic multipliers. Low-cost Midwest and Southern cities often trade at 6 to 9. Most large metros trade at 9 to 13. Premium coastal markets trade at 15 to 25. Knowing the local range tells you whether a listing is priced for income or for appreciation before you read the description.
Rough cash flow. Under typical expenses, a GRM of 8 or lower will usually cover a 30-year mortgage with 25% down. A GRM above 12 almost never will. The good GRM guide covers the bands.
What GRM skips
Everything below the gross rent line. Vacancy, property taxes, insurance, HOA dues, maintenance, capital reserves, management, utilities. Two properties with identical GRMs can differ by two points of cap rate if one is a condo with $400 monthly dues or sits in a 2% property tax state.
Financing. GRM says nothing about what you will earn on your own cash after a mortgage.
Condition and growth. A property that needs a roof and one that got a roof last year have the same GRM. So do a property in a market with 5% rent growth and one in a flat market.
Converting GRM to cap rate
Cap rate is net operating income divided by price. Since NOI is gross rent minus vacancy minus expenses, the two are linked:
Cap rate ≈ (1 − vacancy) × (1 − expense ratio) / GRM
With 5% vacancy and expenses at 36% of collected rent, the numerator is about 0.61. A GRM of 10 implies a cap rate near 6.1%. A GRM of 8 implies about 7.6%. A GRM of 15 implies about 4.1%.
The calculator shows this implied cap rate and lets you change the assumptions. It is an estimate. The GRM vs cap rate guide covers when the estimate is close enough and when it is not.
When to use it
Screening. Forty listings, one afternoon. GRM sorts them and throws out the ones that cannot work.
Sanity checks. A listing at a GRM of 18 in a market where everything trades at 10 is either mispriced or has a story. Either way you know to ask.
Quick valuation. Multiply annual rent by the GRM comparable properties sold at. If similar rentals trade at 9 and a property rents for $30,000, it is worth about $270,000 by that method. The GRM valuation guide covers the approach and its limits.
When to stop using it
As soon as a property is on the short list. From there, build a real net operating income with the actual taxes, insurance and dues, compute the cap rate, and add your financing to see the cash on cash return. GRM got the property onto the list. It cannot tell you whether to buy it.
The GRM pages show the rent and implied cap rate behind every multiplier from 4 to 20.
Frequently asked questions
Is a lower GRM better?
For a buyer, yes. A lower GRM means more rent per dollar of price. A GRM of 8 means the property produces one eighth of its price in gross rent each year; a GRM of 12 produces one twelfth. Lower usually means more cash flow, though it can also mean a rougher property or market.
Is GRM monthly or annual?
Usually annual: price divided by twelve months of rent. Some investors and older textbooks divide by one month of rent instead, which gives a number twelve times larger. A GRM of 10 annual is 120 monthly. Check which one a listing or article is using.
Does GRM include vacancy?
No. GRM uses gross scheduled rent, the rent with every unit full. It ignores vacancy the same way it ignores taxes and repairs. That is why a GRM is a screen and not a return.
What is the difference between GRM and gross yield?
They are inverses. Gross yield is annual rent divided by price, expressed as a percent. A GRM of 10 is a 10% gross yield. A GRM of 8 is 12.5%. Same information, flipped.