A T-12 — short for trailing twelve months — is a financial statement showing a property's actual income and expenses, month by month, over the most recent twelve-month period. It's the standard document commercial real estate buyers, lenders, and asset managers use to see how a property really performs, as opposed to how a budget or projection says it should.
Why the T-12 Matters in CRE
Underwriting lives or dies on the quality of its starting numbers. A pro forma tells you what a seller hopes the property will do; the T-12 tells you what it actually did. That's why lenders ask for one on nearly every financing, and why most acquisition models begin with the T-12 and adjust from there with explicit assumptions — market rents, new management, planned capital work.
The month-by-month format is the point. An annual total can hide a lot; twelve monthly columns show seasonality, one-time items, and trends that change what the property is worth.
A Worked Example
Take a 120-unit multifamily property with average in-place rent of $1,500 per month. Its T-12 might roll up like this:
- Gross potential rent: $2,160,000
- Vacancy & credit loss: −$129,600 (6%)
- Other income (fees, parking, laundry): +$60,000
- Effective gross income: $2,090,400
- Operating expenses: −$940,700 (45% of EGI)
- Net operating income: $1,149,700
The roll-up looks clean — the monthly detail is where underwriting actually happens. Maybe March shows an expense spike from an insurance renewal, June includes a one-time $40,000 roof repair that shouldn't be treated as recurring, and rents over the last three months are running ahead of the twelve-month average — a sign of recent rent growth the annual figure understates. A careful reader normalizes the one-time items and weighs the recent trend before trusting that NOI.
T-12, T-3, and Pro Forma
You'll often see these side by side. The T-12 is the trailing year of actuals. A T-3 takes the most recent three months and annualizes them — useful when a property is changing quickly, since it captures where rents and expenses are heading now. A pro forma is a forward projection. Good underwriting reconciles all three: history, trajectory, and plan.
How Teams Handle T-12s Today
Mostly by hand. A property manager or broker sends the T-12 as a PDF or spreadsheet export, and an analyst re-keys the numbers into that deal's model — again for the next deal, and the one after that. With Playgrounds, you upload the T-12 once and describe the model you need; the numbers land in a working underwriting app that flags the one-time items and keeps itself current as new statements arrive.
Frequently Asked Questions
What does T-12 stand for?
Trailing twelve months. A T-12 statement reports a property's actual income and expenses, month by month, for the most recent twelve-month period — as opposed to a calendar-year statement or a forward-looking budget.
Where do I get a T-12?
From whoever operates the property. On an acquisition, the seller or broker provides it as part of due diligence; on an asset you own, the property manager exports it from the accounting system, usually monthly.
What's the difference between a T-12 and a pro forma?
A T-12 is history — what the property actually earned and spent. A pro forma is a projection of what a buyer believes it could earn. Underwriting typically starts from the T-12 and adjusts toward the pro forma with explicit, defensible assumptions.
What should I look for when reviewing a T-12?
One-time items dressed up as recurring income or expense, expense spikes like an insurance renewal or major repair, seasonality in utilities, and whether the most recent three months tell a different story than the twelve-month average.
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