GRM = price ÷ annual rent. Lower is generally better — a quick screen, not a full analysis.
Calculation details
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What does this calculator estimate?
The gross rent multiplier (GRM) is a quick valuation ratio: property price divided by annual gross rent, used to compare investment properties. A lower GRM suggests a better income-to-price value. Enter the price and monthly rent to get it.
- GRM = price ÷ annual gross rent
- Lower GRM = more rent income per dollar of price
- Quick comparator, ignores operating costs
What GRM tells you
The gross rent multiplier is price divided by annual rent — the years of rent needed to pay the price. It's a fast market screen: lower GRM means more rent per dollar of price. Investors compare GRMs across markets and properties.
Limitations to watch for
GRM uses gross rent — no expenses, vacancy, or financing. Two properties with the same GRM can have very different costs. Use it as a screen, then run cash flow and cap rate for the real comparison.
How to use it in practice
Divide the asking price by the annual market rent. Compare candidates and markets — 10–16 is common in the US, higher in expensive cities. Pair with rental yield (the inverse relationship).
['Enter the property price.', 'Enter the monthly or annual rent.', 'Read the GRM.']
What GRM measures
The gross rent multiplier is property price ÷ annual gross rent: a $300,000 property renting $2,000 monthly (24,000 annual) has a GRM of 12.5. It is the quickest screen for comparing income properties.
Why gross, not net
GRM uses gross rent — no expense adjustment — which makes it fast but rough. Two properties with the same GRM can have very different net income if one has high taxes or maintenance. Use GRM to shortlist, then verify with NOI and cap rate.
Typical GRM ranges
GRMs of 8–14 are common in residential markets; lower GRM means more rent per dollar of price, generally a better deal screen. Hot markets push GRMs higher. Compare within the same market and property type.
A worked example
A $250,000 duplex renting $1,500 total monthly: GRM = 250,000 ÷ 18,000 ≈ 13.9. At $1,800 rent, GRM drops to about 11.6 — the calculator shows how rent growth improves the screen.
GRM vs. cap rate
GRM ignores expenses; cap rate includes them via NOI. A property can have a great GRM and a bad cap rate if expenses are high. The calculator gives the quick number; the cap-rate calculator gives the decision number.
How this calculator works
Formula
GRM = property price ÷ annual gross rent. It's the years of rent it takes to cover the purchase price.
Worked example
$300,000 property with $24,000 annual rent: GRM = 12.5.
Assumptions to verify
- Rent is at market rate.
- Gross rent means full occupancy.
- No expenses are included.
Frequently asked questions
What is the gross rent multiplier?
Property price ÷ annual rent: $300,000 ÷ $24,000 = 12.5 years of rent.
How is it calculated?
Price ÷ (monthly rent × 12).
What is a good GRM?
Lower is better — 10–16 is common; expensive cities run 20+.
How is it different from rental yield?
They're inverses: yield = 1 ÷ GRM. A 12.5 GRM ≈ 8% gross yield.
Does it include expenses?
No — gross rent only. Run the cash flow numbers for the real return.
Why do hot markets have high GRMs?
Prices run ahead of rents — often a sign of weak cash flow and appreciation-dependent returns.
How do I use it to compare?
Rank candidates by GRM first, then verify with full cash-flow analysis.
What is a gross rent multiplier?
Property price ÷ annual gross rent — a quick income-property comparison screen.
How do I calculate GRM?
Price ÷ (monthly rent × 12).
Does GRM include expenses?
No — it uses gross rent; use cap rate for the expense-adjusted view.
Cite this tool
BoringToolsKit. “Gross Rent Multiplier Calculator.” boringtoolskit.com/gross-rent-multiplier-calculator/ (reviewed 2026-08-25). Free to reference in articles, syllabi, and answer posts with a link.
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