Gross Rent Multiplier Calculator
Compare properties fast using price against a year of gross rent.
Details
= $30,000 / yr · before expenses
What similar properties sell at
Gross rent multiplier
10
Price at market GRM
$330,000
1% rule
0.83%
Below market price by
$30,000
Rent at market GRM
$2,273
This divides a property's price by its annual gross rent to give the gross rent multiplier, a one-number screen for comparing listings.
It also runs the other way, turning a market GRM and a rent figure into an implied value.
What gross rent multiplier means
Gross rent multiplier is price divided by annual gross rent. It answers one question: how many years of rent does this property cost?
A GRM of 10 means the price equals ten years of rent. Lower is cheaper relative to income, higher is more expensive. It takes two numbers and about five seconds, which is exactly the point.
What it deliberately ignores is expenses. Two properties with an identical GRM can have completely different profits if one has $12,000 of annual costs and the other $4,000. GRM sorts a list. It does not decide a purchase.
Run forward it scores a listing. Run backwards it prices one: if similar properties trade at a GRM of 10, this one at 13.33 is priced well above the local pattern.
What to enter
- Purchase price
- The asking price or your intended offer. Some investors add renovation costs to make comparisons fairer.
- Gross annual rent
- Twelve months of rent before any expenses and before vacancy. Gross is the whole point of this measure.
How GRM sits against the other quick measures
- GRM
- Price divided by gross rent. Ignores all expenses. Fastest to work out, so it is used for first-pass screening.
- [Cap rate](/real-estate/cap-rate-calculator)
- Net operating income divided by price. Counts expenses but not financing. The standard comparison measure.
- [1% rule](/real-estate/one-percent-rule-calculator)
- The same idea as GRM in different clothing. Monthly rent at 1% of price is a GRM of 8.33.
- [Cash-on-cash](/real-estate/cash-on-cash-return-calculator)
- Cash returned against cash invested. Counts everything, including the mortgage.
What this assumes
Expenses are ignored entirely, which is the measure's defining limitation and not an oversight.
GRM is only meaningful against local comparables. There is no universal good number.
How to calculate gross rent multiplier
One division. The value is in what you compare the answer against.
- gross annual rent
- Monthly rent × 12, before expenses and vacancy
- GRM
- Years of gross rent the price represents
Annualise the rent. Monthly rent times 12. Use current market rent, not a below-market rent an existing tenant happens to pay.
Divide the price by it. That is the GRM. Nothing else enters the calculation.
Compare against local comparables. A GRM of 13 might be cheap in one metro and expensive in another. Only the local pattern gives it meaning.
Run it backwards to price a property. Multiply the market GRM by this property's rent to get an implied value, then compare that with the asking price.
See a worked example: screening a listing, then pricing it
- Asking price
- $400,000
- Rent
- $2,500 a month
- Local market GRM
- About 10
Annual rent: $2,500 × 12 = $30,000.
GRM: $400,000 ÷ $30,000 = 13.33.
Backwards: at the local GRM of 10, $30,000 of rent implies a value of $300,000.
The asking price is a third above what local rents support. That does not automatically kill the deal, but it does demand an explanation.
GRM 13.33 against a local 10
Frequently asked questions
There is no universal figure, and anyone quoting one is guessing. GRM is only meaningful against comparable properties in the same market.
As rough orientation, investors tend to treat 4 to 7 as strong, 8 to 12 as typical, and above 12 as expensive relative to rent. Expensive coastal metros routinely run far higher, and those properties are bought for appreciation rather than income.
GRM uses gross rent and ignores expenses. [Cap rate](/real-estate/cap-rate-calculator) uses net operating income, so it accounts for taxes, insurance, maintenance and management.
GRM is faster and needs less information, which makes it good for a first pass over many listings. Cap rate is more accurate and is what you use once a property is on your shortlist.
Annual, which is the standard convention and gives figures in the 4 to 15 range.
Some people divide by monthly rent instead, giving numbers twelve times larger. Both are valid arithmetic, but comparing one against the other is meaningless. Check which basis a quoted figure uses.
Because expenses are invisible to GRM. An older building with high maintenance, high taxes and a costly insurance market can have identical rent and price to a newer one, and make far less money.
That is the whole reason GRM is a screen rather than a decision tool. Once a property passes, move to cap rate and then to full cash flow.
Yes, and it is the most useful thing GRM does. Multiply the local market GRM by the property's market rent to get an implied value.
If similar properties trade at a GRM of 10 and this one rents for $30,000 a year, $300,000 is the price local rents support. Anything above that needs a reason, such as a genuinely better location or condition.
Problems people actually run into
Comparing GRM across different markets
A GRM of 15 looks alarming next to a GRM of 7, but they may be from cities with completely different expense structures, tax rates and growth expectations.
GRM has no meaning in isolation. Compare only against properties in the same market, and preferably the same neighbourhood and property type.
Using it as a decision tool rather than a screen
A low GRM often signals a reason: deferred maintenance, high vacancy, a declining area, or unusually high property taxes. The measure cannot see any of that.
Use GRM to cut fifty listings down to five. Then run cap rate and full cash flow on those five before going near an offer.
Results are estimates for general information only and are not professional financial, medical, or legal advice. Read our full disclaimer.
Last updated: September 4, 2026