Tiny Toolkit

GRM Calculator

Gross Rent Multiplier is the fastest way to compare rental properties without diving into full expense analysis — it tells you how many years of gross rent it would take to pay off the purchase price. Enter the asking price and monthly rent to see the GRM instantly alongside an annual rent figure. A GRM under 8 is generally strong; above 12 the property is expensive relative to its income.

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Frequently Asked Questions

What is the Gross Rent Multiplier?
GRM = Property Price ÷ Annual Gross Rent. It tells you how many years of gross rent would be required to pay back the purchase price at 100% occupancy. Lower is better: a GRM of 8 means 8 years of gross rent equals the purchase price.
What is a good GRM?
In most US markets, a GRM under 8 is considered strong for investors. Between 8–12 is moderate. Above 12 is generally expensive relative to income, often found in coastal cities with high appreciation expectations priced in.
How is GRM different from cap rate?
GRM uses gross rent only; it ignores all expenses. Cap rate uses NOI (net operating income after expenses) and is more accurate. GRM is a fast screening tool; cap rate is the deeper analysis you do after a property passes the GRM filter.
Can I use GRM to estimate property value?
Yes. If you know market GRM and annual gross rent, you can estimate value: Estimated Value = Annual Gross Rent × Market GRM. This is commonly used when comparable sales data is limited.

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