Gross Rent Multiplier (GRM) Calculator
Calculate the gross rent multiplier to quickly screen and compare investment properties based on price relative to rental income.
Results
Visualization
How It Works
The gross rent multiplier is a quick-and-dirty screening tool for rental properties. It tells you how many years of gross rent it takes to equal the purchase price. Lower GRM means better value relative to income, making it useful for rapid deal comparison before doing deeper analysis.
The Formula
Variables
- Property Price — Asking price or purchase price of the investment property
- Annual Gross Rent — Total scheduled rental income for 12 months, before any expenses or vacancy
- GRM — Number of years of gross rent needed to equal the property price
Worked Example
A property is listed at $280,000 and rents for $2,000/month ($24,000/year). GRM = $280,000 / $24,000 = 11.67. A similar property nearby is listed at $240,000 with $22,000 annual rent, giving a GRM of 10.9. The second property offers better value relative to its income.
Practical Tips
- GRM below 10 is generally considered a strong buy in most markets.
- Use GRM as a first-pass filter — screen 50 properties in minutes, then analyze the best 5 deeply.
- GRM ignores expenses entirely — a low GRM property with massive repair needs may be a bad deal.
- Compare GRM only within the same neighborhood and property type for meaningful results.
- GRM works best for comparing similar properties — not for evaluating a single deal in isolation.
Frequently Asked Questions
What is a good gross rent multiplier?
In most investment-friendly markets, a GRM of 4-10 is considered good. Below 8 is excellent in many areas. In expensive coastal cities, GRM of 15-20+ is common, which is why cash flow investing there is difficult.
Is GRM better than cap rate?
No, GRM is simpler but less accurate. Cap rate factors in expenses, which GRM ignores. Use GRM for quick screening, then calculate cap rate for properties that pass the GRM test.
Does GRM account for expenses?
No, that is its biggest limitation. Two properties with the same GRM can have very different profitability if their expenses differ. Always follow up GRM with a full NOI or cash flow analysis.
Can I use GRM to estimate property value?
Yes. If comparable properties in an area sell at a GRM of 10, and a property rents for $30,000/year, its estimated value is $300,000. Appraisers sometimes use this approach for income properties.
How does GRM vary by market?
In Midwest cash-flow markets (Cleveland, Indianapolis), GRM might be 5-8. In coastal appreciation markets (San Francisco, Miami), GRM can be 15-25. The difference reflects growth expectations vs. current income.