Cap rate, NOI, and GRM calculator, built for income-property exam traps.
Calculate capitalization rate, net operating income, value, and gross rent multiplier while keeping debt service out of the wrong formula.
Cap rate equals NOI divided by value. Value equals NOI divided by cap rate. NOI equals gross income minus vacancy and operating expenses. GRM equals value divided by gross rent. The exam trap is mixing gross income, net income, and mortgage payments.
Cap rate measures net operating income compared with property value.
When cap rate and NOI are known, divide NOI by the cap rate decimal.
NOI starts with gross income, then subtracts vacancy and operating expenses.
GRM uses gross rent, not NOI. That is the whole trap.
Mortgage payments are not operating expenses in a cap rate question.
Separate gross rent, NOI, cap rate, and GRM before calculating.
Income-property math is mostly a sorting problem before it is math.
Cap rate uses net operating income, not gross rent. Subtract vacancy and operating expenses when the question gives them.
Debt service is not subtracted for NOI in a cap rate problem. It matters for cash flow, not property-level NOI.
GRM uses gross rent. Cap rate uses NOI. Mixing those two formulas creates a clean-looking wrong answer.
Cap rate is NOI divided by value. GRM is value divided by gross rent. The exam may put both gross rent and expenses in the same question to see whether you know which formula you are using.
Sort the income before choosing the formula.
Income-property questions look busy because they include rent, vacancy, expenses, value, cap rate, and sometimes a mortgage payment. Only some of those numbers belong in NOI.
Is the question asking for cap rate, value, NOI, or GRM?
Name the formula before sorting the numbers. Cap rate uses NOI. GRM uses gross rent. They are not interchangeable.
Did the problem give gross rent, vacancy, and expenses?
Calculate NOI first. Gross rent minus vacancy minus operating expenses equals NOI.
Did the problem include a mortgage payment?
Ignore debt service for cap rate and NOI unless the question asks for cash flow. Debt is a common distractor.
Is the rent monthly or annual?
Annualize monthly rent before calculating NOI. For GRM, use the period the question expects.
Four income-property patterns to drill before test day.
These examples cover direct cap rate, value from income, NOI setup, and the GRM formula switch.
$160,000 NOI and $2,000,000 value
Cap rate is a percent, so convert the decimal after dividing.
$90,000 NOI at a 7.5 percent cap rate
Divide by 0.075, not by 7.5.
$120,000 gross income, 5 percent vacancy, $35,000 expenses
Vacancy is subtracted before cap rate is calculated.
$300,000 value and $2,500 monthly gross rent
GRM uses gross rent. Cap rate uses NOI.
The mistakes that turn income math into a guessing game.
The exam is usually testing whether you know what belongs in NOI and what belongs in a different formula.
Subtracting the mortgage payment from NOI
Debt service changes investor cash flow, not property-level NOI. The exam loves placing it in the question as a distractor.
Using gross rent in the cap rate formula
Cap rate uses NOI. If expenses and vacancy are given, calculate NOI before dividing by value.
Using NOI in a GRM problem
GRM is value divided by gross rent. It is a rough multiplier, not a net-income formula.
Dividing by 7.5 instead of 0.075
When solving value from cap rate, convert the percent to a decimal first. Otherwise the value will be far too small.
Stopping at NOI when the question asks for value
Many income-property questions require a first step and a final step. Re-read the last sentence before choosing.
What to study next if income math feels crowded.
Cap rate sits between appraisal and investment math. Pair it with LTV and formula review so each setup stays separate.
How do you calculate cap rate on the Florida real estate exam?+
Divide net operating income by property value, then convert the decimal to a percent. If NOI is $160,000 and value is $2,000,000, cap rate is 8 percent.
How do you calculate NOI?+
Start with gross income, subtract vacancy loss, then subtract operating expenses. Do not subtract mortgage payments, income taxes, depreciation, or capital improvements for a basic cap rate problem.
How do you find value from NOI and cap rate?+
Divide NOI by the cap rate decimal. For example, $90,000 divided by 0.075 equals $1,200,000.
What is the difference between cap rate and GRM?+
Cap rate uses net operating income divided by value. GRM uses value divided by gross rent. Cap rate is net-income based. GRM is gross-income based.
Is this calculator for live investment underwriting?+
No. It is built for Florida real estate exam preparation. Real investment analysis can include financing, taxes, reserves, capital expenditures, lease quality, market risk, and professional appraisal judgment.
A rental property produces $120,000 in annual gross income. Vacancy is 5 percent. Operating expenses are $35,000. The property is worth $850,000. What is the cap rate?
Vacancy loss: $120,000 x 0.05 = $6,000. NOI: $120,000 - $6,000 - $35,000 = $79,000. Cap rate: $79,000 / $850,000 = 9.29 percent.