Price ÷ annual rent: the 30-second screen for any rental deal
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Gross Rent Multiplier
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Gross Payback (Years of Rent)
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Implied Fair Value
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Asking Price vs Implied
GRM
Reading
Typical of
GRM ignores expenses, vacancy and financing by design — it's a screen. Anything that passes deserves the full Cap Rate analysis before an offer.
Purchase price
GRM
Gross payback (yrs)
The gross rent multiplier is the fastest useful number in real estate: price divided by a year of rent. No expenses, no financing, no spreadsheet — which is precisely the point. When you're scanning forty listings, GRM sorts them in seconds; the survivors earn the full cap-rate treatment. This calculator runs both directions: compute a GRM from any listing, or turn your market's typical GRM plus a rent roll into an implied fair value that flags over- and under-priced askings instantly.
A $320,000 house renting for $2,400/month carries a GRM of 11.1 — eleven years of gross rent to recover the price. If comparable rentals in that submarket trade at a GRM of 10, the implied value is $288,000 and the asking price is ~11% rich; the reverse mode does this arithmetic for you and issues the verdict.
Reading GRM Bands
GRM
What it usually means
4–7
Heavy cash-flow pricing — often older housing stock, higher management burden; verify why it's cheap
8–11
The balanced middle where most rental investing lives
12–16
Growth-priced markets — income alone won't carry the deal; you're partly buying appreciation
17+
Gateway-city pricing — rentals here are appreciation bets with a rent subsidy
What GRM Deliberately Ignores (and When That Bites)
Expenses: two properties at GRM 10 are not equal if one has $8,000 property taxes and the other $2,500. GRM screens; cap rate decides.
Vacancy & condition: a cheap GRM on a building with deferred maintenance is a rehab project wearing a rental costume.
Rent accuracy: GRM is only as good as the rent figure — use actual leases or solid comps, not the listing agent's "market rent potential."
Finding Your Market's GRM
Pull 5–10 recent sales of comparable rentals in the submarket, divide each price by its annual rent, and take the median. That number is your yardstick for every listing that follows — and tracking it quarterly tells you whether your market is heating or cooling faster than any headline.
How to Use the Calculator
Screening mode: price + rent → GRM; compare against your market's median and the band table.
Valuation mode: market GRM + property rent → implied value; the verdict card grades the asking price.
Anything interesting goes to the Cap Rate Calculator with full expenses before an offer.
Frequently Asked Questions
GRM or price-to-rent ratio — same thing?
Same math, different framing: GRM is used for valuing income property; price-to-rent (price ÷ annual rent) is quoted in rent-vs-buy decisions for owner-occupants. A GRM of 11 = price-to-rent of 11.
What's a 'good' GRM?
Lower means more rent per dollar of price — but only relative to the same submarket and property class. GRM 9 might be expensive for that block or cheap; the median of local comps is the only honest benchmark.
Why use GRM at all when cap rate exists?
Speed and data availability: GRM needs two numbers you always have (price, rent); cap rate needs six you often don't (real taxes, insurance, maintenance...). Screen wide with GRM, underwrite deep with cap rate.
Does GRM work for short-term rentals?
Poorly — STR revenue is occupancy-volatile and expense-heavy, so gross multipliers mislead. Use the Airbnb Income Estimator's true-profit output instead.
Can I use GRM for my own home's value?
As a sanity check, yes: if homes like yours rent for $2,200 and the local GRM is 12, a ~$317,000 value is defensible. Appraisals weigh sales comps more heavily, but GRM catches bubble pricing early.
Is my information private?
Yes — both calculations run locally in your browser.
Keep your market's median GRM in your head and every listing sorts itself on sight. It's the one number that makes you faster than the crowd — as long as you remember it's the beginning of the analysis, never the end.