The fast valuation shortcut — price divided by gross rent.
The Gross Rent Multiplier (GRM) is the price of a rental property divided by its annual gross rental income. A property selling for $400,000 with $40,000 of annual gross rent has a GRM of 10. GRM is the fastest, simplest rental property valuation shortcut — used for back-of-envelope screening before deeper underwriting.
GRM is the original "back-of-the-napkin" rental valuation. Before electronic underwriting and instant comparable databases, brokers and investors used GRM as a shortcut to triangulate whether a property's price was reasonable relative to its rent. Today GRM is still useful for fast screening — a property with a market-low GRM relative to nearby comps is at least worth a closer look.
The limitation of GRM is that it uses gross rent — it ignores operating expenses, vacancy, and capex entirely. Two identical-rent properties can have wildly different cap rates if one has high taxes and the other has low. GRM treats them as equally valuable, which is why GRM is a first-glance metric, not a final-decision metric.
GRM benchmarks vary by market. In high-cost coastal markets, GRMs of 15–25 are typical (rent is a smaller share of price). In Midwest and Southeast cash-flow markets, GRMs of 6–10 are typical. Single-family rentals usually trade at higher GRMs than 2–4 unit residential, which trade higher than 5+ unit multifamily — the bigger the rental footprint, the lower the GRM tends to be.
Smart investors use GRM as a quick filter, then move to cap rate, DSCR, and full underwriting on properties that pass the screen. A property with a GRM of 7 in a market where typical GRM is 10 is worth a full underwrite — it might be a real deal or it might have hidden problems (deferred maintenance, in-place leases below market, regulatory issues) that GRM doesn't see.
| Asking price | $285,000 |
| Annual gross rent (2 units × $1,300 × 12) | $31,200 |
| GRM = $285,000 ÷ $31,200 | 9.13 |
| Market GRM for similar duplexes | ~10.5 |
| Implication | Priced below market — worth a full underwrite |
Depends on market. In cash-flow Midwest markets, 6–10 is typical. In coastal markets, 15–25 is normal. The right benchmark is your specific submarket's GRM for similar property class.
GRM uses gross rent; cap rate uses net operating income (after expenses). Cap rate is far more accurate but takes more work to calculate. GRM is faster but more superficial.
A low GRM relative to market means the property is priced cheaply relative to rent — but that could reflect real problems (high expenses, deferred maintenance, regulatory issues). Use GRM to identify candidates, then underwrite properly before buying.
Rarely — commercial real estate uses cap rate almost exclusively. GRM is a residential and small multifamily shortcut.
Price-to-rent uses monthly rent (so the multiplier is 12× higher than GRM). GRM uses annual rent. Same concept, different time unit.
Matrix funds DSCR rental loans on 1–8 unit residential and small-balance multifamily. Asset-based underwriting, fast close, and pricing that lets the deal cash-flow.
