How to read this result
In the default example, gross rent multiplier is 10.00x. Results describe this input scenario; they are not a recommendation.
Change one assumption at a time to see how it affects the scenario. Compare periods and cost definitions consistently. Negative results show a modeled shortfall; an unavailable ratio needs a valid denominator.
Formula and methodology
Divide property price by annual gross rental income. The result is a multiple of one year of gross rent, before vacancy, operating expenses and financing.
Enter percentages as whole numbers: 5 means 5%. When used as a factor, the calculation divides a percentage by 100. Percentage outputs multiply the final ratio by 100. Calculations retain precision internally; displayed amounts and rates are rounded to two decimals.
Variables and input definitions
- Property price or value (USD)
- Property price/value. Minimum: 0.
- Annual gross rent (USD/year)
- Gross scheduled rental income before expenses. Minimum: 0.
Worked example
This example uses the exact prefilled inputs above. Reset defaults to restore this scenario after making changes.
| Item | Default scenario |
|---|---|
| Property price or value | $480,000.00 |
| Annual gross rent | $48,000.00 |
| Item | Default scenario |
|---|---|
| Gross rent multiplier | 10.00x |
Assumptions and limitations
GRM ignores vacancy and operating expenses and should not be treated as a full investment return metric.
Results describe this input scenario; they are not a recommendation.
The tool uses values you supply. It does not retrieve market prices, verify leases or inspect a property. Results exclude items outside the listed inputs. Review local requirements and the relevant contract when a payment, fee or allocation depends on them.
Common mistakes
Comparing GRM across properties with very different expense structures can be misleading. A low multiple may accompany high costs or weak collection; it is only an initial screening measure.
Sources and method references
These references provide context for the method and terminology. They do not endorse this tool or validate your property assumptions.
- Office of the Comptroller of the Currency — Comptroller's Handbook — Commercial Real Estate LendingNOI, direct capitalization, cap-rate valuation and DCF concepts for commercial real estate.
- Appraisal Institute — Basic Formulas — Income CapitalizationIncome/cap-rate/value relationships, gross income multiplier and debt-coverage formula references.
Frequently asked questions
Should I use monthly or annual rent for GRM?
This calculator uses annual gross rent. Multiply scheduled monthly rent by 12 before entering it, and use a consistent income basis for comparable properties.
Does GRM tell me how long the investment takes to repay?
No. Rent must also fund expenses and other obligations. GRM is a price-to-gross-income comparison, not a cash payback period.