Most owners we meet quote their building's net operating income when they mean the money that reaches their account. They are not the same number, and the gap between them is where commercial buildings quietly get into trouble.
This is the first in a series on how to read your own building. No market data, no forecasts: just the numbers you already have, and what they actually say.
Net operating income is rent and expense recoveries, minus operating expenses. Property tax, insurance, utilities, repairs and maintenance, management: all of that comes out. What is left is NOI, and it is the number a broker puts on a listing, a lender divides by a cap rate, and an appraiser starts from.
It is a useful number. It is also an incomplete one, because three real cash lines sit below it and never appear on a flyer.
If the building carries a loan, principal and interest come out of NOI before anything reaches you. Lenders compare the two directly: NOI divided by annual debt service is the debt service coverage ratio, and most commercial lenders want to see it at 1.25 or better on the income that is actually in place today, not the income a pro forma says will arrive in year three.
The practical point for an owner: a building can post a healthy NOI and still be a cash drain if it was financed at a price that assumed rents nobody has yet paid.
Every time a commercial space turns, it costs money to fill. The tenant-improvement allowance goes to building out the space; the leasing commission goes to the brokers who brought the tenant. Neither is an operating expense, so neither reduces NOI. Both are cash, and both arrive in a lump.
On an office or retail space, a competitive TI package plus a full commission can equal a year of rent or more. A building where two spaces roll in the same year can show flat NOI and negative cash flow for twelve months, and the owner who only watched NOI will not see it coming.
The roof, the HVAC units, the parking lot, the elevators: none of these are operating expenses either, and all of them will be replaced whether or not you planned to. A reserve of some amount per square foot per year, set aside against a written capital plan, is the difference between a building that funds its own replacements and one that funds them out of a refinance or the owner's pocket.
Lenders and buyers both underwrite a reserve. If you do not, you are the only party in the transaction pretending the roof lasts forever.
The figures below are illustrative, not a property we manage. Consider a 20,000-square-foot multi-tenant building with $400,000 of NOI.
Cash to the owner in that year: about negative $10,000. The listing says $400,000. Both are true. Only one of them pays your mortgage.
Pull your last twelve months of operating statements and put four lines on one page: NOI, debt service, leasing costs actually paid, and what you set aside for capital. If you have only ever tracked the first, the other three will explain more about how the year felt than the first one does.
Then look eighteen months forward at your rent roll. Every lease expiring in that window is a line-three event waiting to happen. That is the subject of a later article in this series.
Gain Property Group manages more than 600,000 square feet of office, retail, industrial and multifamily property across Hillsborough, Pinellas, Pasco, Polk, Manatee and Sarasota counties, including buildings we own ourselves. Once a quarter we publish what we are actually seeing across that portfolio in the Tampa Bay CRE Letter. It is free, and it is one email a quarter.
If you own commercial property in Tampa Bay and want a second set of eyes on all four lines, request a free management assessment. One of our producers will walk the building with you and put your numbers next to what we run, in writing, whether or not you change managers.
This article is general information about commercial property operations. It is not investment, legal or tax advice.