How to Read a T12: 9 Red Flags in Multifamily Financials
The trailing twelve is the primary evidence base for underwriting a multifamily acquisition. Here are the nine things experienced buyers look for, and what each one usually means.
The trailing twelve is what actually happened. The proforma is what the seller hopes happens next. Almost every underwriting error of consequence traces back to reading the second document as though it were the first.
Reading a T12 well is mostly pattern recognition. These are the nine patterns worth knowing.
1. The annual column hides the run rate
The single most common mistake is reading only the twelve month total. Pull the trailing three and trailing six months, annualize both, and set them beside the full year.
If T3 annualized is meaningfully above T12, income is climbing and the annual figure understates the property. If it is below, something changed recently, and finding out what is the whole job. Either way the annual column is an average of a year that may no longer describe the asset.
2. Expenses that stop partway through the year
Scan each expense line horizontally across the months. A repairs line running $4,000 a month for eight months and then $900 for four is not an efficiency gain. It is usually deferred maintenance, and you will inherit it.
The same pattern in payroll typically means a position went unfilled. In marketing it often means the property stopped advertising because it was being prepared for sale.
3. An operating expense ratio below 30%
The operating expense ratio on conventional multifamily generally lands between 35% and 55% of effective gross income. Anything materially below that band is an incomplete expense load, not exceptional management.
The usual omissions, in order of frequency:
- Property taxes at the seller's basis. Most jurisdictions reassess on sale, and on a long-held asset this is often the single largest adjustment in the entire model.
- No management fee. Self-managing owners frequently report none. Underwrite 3% to 4% of effective gross income regardless.
- No replacement reserves. Sellers present NOI before reserves because it raises value. Lenders underwrite $250 to $300 per unit per year.
- Insurance at the expiring premium. In coastal and hail-exposed markets renewals have repriced dramatically.
4. Insurance that has not been re-quoted
Insurance deserves its own line here because it has moved more than any other expense category in recent years. A T12 carrying last year's premium in Florida, Texas, or Louisiana can understate the go-forward cost substantially.
Get a real quote during diligence rather than trending the historical number.
5. One-time items in both directions
Underwriters reliably strip out non-recurring expenses. Fewer strip out non-recurring income.
Look for legal settlements, insurance proceeds, one-time fee income, and utility refunds on the revenue side, and for a single large legal or turnover charge on the expense side. Both distort, and removing only the ones that hurt you produces a flattering number rather than a true one.
6. Revenue that does not tie to the rent roll
Annualize the rent roll and compare it against trailing collections. These will never match exactly, since the roll is a snapshot and the T12 is a period, but they should be close.
A large gap has a small number of explanations: heavy concessions not visible in face rents, real delinquency, or a rent roll presenting market rather than in-place rents. Each changes the underwriting materially, and the seller knows which one it is.
7. Occupancy that looks better than collections
Physical occupancy counts units. Economic vacancy counts dollars, and the two routinely diverge by four or five points.
A property can be 95% occupied and collecting 85% of gross potential rent once concessions, bad debt, down units, and employee units are netted out. When an OM quotes a 5% vacancy factor, the relevant question is what the other leakage looks like on the trailing twelve.
8. A management change mid-year
A step change across several lines at the same month usually means the property changed management companies. Everything before that break describes a differently run asset.
This is not necessarily bad. A recent professional management transition can be genuine upside. But it means the earlier months are weak evidence for the go-forward run rate, and the trailing three matters more than usual.
9. Missing months, missing detail, or a summary only
A T12 with no monthly breakout, no rent roll, or no expense detail is withholding something. Occasionally it is disorganization on a small owner's part. Frequently it is not.
Ask for the detail. What arrives, and how quickly, tells you a great deal about both the asset and the counterparty.
The underlying discipline
Every one of these reduces to the same practice: rebuild net operating income from the evidence rather than accepting the version handed to you, and treat any number you have not reconstructed as unverified.
That is unglamorous work, and it is most of what separates a defensible underwriting from a hopeful one. It is also, mechanically, quite repetitive, which is why we built MultiScreen to do the reconstruction automatically: import the T12 and rent roll, and the reconciliation, expense normalization, and economic vacancy build happen before you have finished reading the OM.
Terms in this post
- Trailing Twelve (T12)
A trailing twelve is an operating statement showing a property's actual income and expenses for the most recent twelve months, and it is the primary evidence base for underwriting a multifamily acquisition.
- Net Operating Income (NOI)
Net operating income is a property's effective gross income minus all operating expenses, excluding debt service, capital expenditures, depreciation, and income taxes.
- Operating Expense Ratio (OER)
The operating expense ratio is total operating expenses divided by effective gross income, expressed as a percentage, and it measures what share of collected revenue is consumed by running the property.
- Replacement Reserves
Replacement reserves are an annual per-unit allowance set aside for the periodic replacement of major building components such as roofs, HVAC systems, and appliances, deducted as an operating expense by most lenders.
- Rent Roll
A rent roll is a unit-by-unit schedule of a property's leases showing unit type, square footage, current rent, market rent, lease start and expiration dates, and occupancy status.
- Economic Vacancy
Economic vacancy is the total percentage of gross potential rent not actually collected, including physical vacancy plus concessions, delinquency, non-revenue units, and loss to lease.
More reading
- How to Underwrite a Multifamily Deal: A 7-Step Framework
A practical, repeatable framework for underwriting a multifamily acquisition, from rebuilding NOI off the T12 through sizing debt, modeling the business plan, and pressure-testing the exit.
- Cap Rate vs. Cash-on-Cash vs. IRR: Which Metric Actually Matters
Four return metrics answer four different questions, and using the wrong one is how deals get mispriced. A practical guide to when cap rate, cash-on-cash, IRR, and equity multiple each apply.
- Your Exit Cap Rate Is Doing More Work Than Your Business Plan
The exit cap rate applies to the largest cash flow in a real estate model and is a pure assumption about a future market. Here is how much it moves returns, and how to underwrite it honestly.