Look for the T-12, rent roll, normalized expenses, excluded items, management fees, taxes, insurance, and repairs.
Plain-English term
NOI
The property income that drives value.
Definition that survives review
Net operating income is rental and other property income minus operating expenses, before debt service and taxes. In a real review, translate the term into the cash flow, priority, deadline, tax treatment, status test, or control right it changes.
Use it as the income engine for value, DSCR, and sale pricing. If you cannot point to the exact document or calculation behind it, you have recognized the vocabulary but not yet understood the deal.
Why it matters
NOI is the engine room. Value, debt coverage, sale price, and half the sponsor story usually point back to this one number. This is why the term is not finished until you know who calculated it, what period it covers, and what happens if the friendlier definition is wrong.
A useful glossary entry should show where the word appears, what input changes it, and which connected term changes the answer next: Cap rate, DSCR, Expense ratio.
How to use it in diligence
Effective gross income - operating expenses = NOI
$1,200,000 of income minus $520,000 of operating expenses leaves $680,000 of NOI before debt service.
Debt service, capital improvements, and income taxes are not operating expenses, but missing real operating costs is still a lie with nicer shoes.
Proof checklist
- The source period, calculation basis, and owner of the number are named.
- The term reconciles to the PPM, operating agreement, lender documents, tax schedule, underwriting model, or verification record.
- The downside version is visible before the optimistic version gets trusted.
Example, trap, question
$1,200,000 of income minus $520,000 of operating expenses leaves $680,000 of NOI before debt service.
Debt service, capital improvements, and income taxes are not operating expenses, but missing real operating costs is still a lie with nicer shoes.
- what expenses are excluded. If payroll, insurance, repairs, or management are treated like footnotes, slow down.
- What source document, schedule, or third-party evidence proves this term in this specific deal?
- Which connected term changes the answer next: Cap rate, DSCR, Expense ratio?
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