Every capital raise comes with a stack of numbers. Somewhere in an offering package or data room, you’ll typically find three documents that matter more than almost anything else in the deck: the T-12, the rent roll, and the pro forma. Together, they show where a property has been, where it stands today, and where the sponsor believes it’s headed. Most investors skim past them, or trust that the sponsor’s summary slide captures what they need to know.
It doesn’t take a finance background to read these three documents — it just takes knowing what each one actually tells you, and which specific numbers are worth a second look.
What Is a T-12 in Real Estate?
A T-12 (trailing twelve months) is a property’s actual income and expense statement for the most recent twelve-month period. It is historical, not projected — it shows exactly what the property collected and spent, month by month, over the last year. Sponsors and lenders use it as the factual starting point for underwriting any deal.
What should I check on a T-12?
- Total income vs. potential income. Most T-12s show gross potential rent alongside actual collected income. A large, persistent gap between the two can signal high vacancy, heavy concessions, or collection problems.
- Expense trend line, month by month. A single T-12 total can hide a lot. If you can get monthly detail, look for expense spikes — a jump in repairs, insurance, or utilities in a specific month can be a one-time event or an early sign of a recurring issue.
- Real estate taxes. These often reset upon sale (reassessment), so the T-12’s tax line may understate what the buyer will actually pay going forward. Check whether the pro forma has adjusted for this.
- Insurance. In many markets, insurance costs have risen sharply in the last few years. If the T-12 reflects an old policy and the pro forma doesn’t show a meaningful step-up, that’s worth asking about directly.
- Management fee. Confirm whether the T-12 reflects the previous owner’s management structure or fee percentage, which may not match what the new sponsor will actually charge going forward.
The T-12 won’t tell you where a deal is going, but it’s the most honest picture of where it’s been.
What Is a Rent Roll and What Does It Show?
A rent roll is a unit-by-unit snapshot of a property: current tenant, lease start and end dates, current rent, and unit type or square footage. It’s the property’s current reality, tenant by tenant, as of a specific date — the foundation the entire business plan gets built on top of.
What should I check on a rent roll?
- In-place rents vs. market rents. The gap between what current tenants pay and what a unit could rent for today is often the entire basis of a value-add business plan. A large gap can represent real upside — or it can mean the property has had trouble raising rents for a reason (unrenovated units, deferred maintenance, a soft submarket).
- Lease expiration concentration. If a large share of leases expire in the same few months, that’s a real operational and leasing risk — a lot of turnover at once, with corresponding vacancy and turn-cost exposure.
- Concessions and discounts. Look for a “net effective rent” or discount column. A property that looks fully leased at a decent rent can actually be carrying significant concessions that lower true income.
- Occupancy at the unit-type level, not just overall. A property that’s 95% occupied overall might be masking a specific unit type or building that’s struggling.
- Delinquency. Some rent rolls include past-due balances. Persistent delinquency across a meaningful share of units is a signal worth investigating, not just a footnote.
The rent roll tells you what’s true right now, unit by unit — which is the foundation the entire business plan gets built on top of.
What Is a Pro Forma in Real Estate?
A pro forma is a sponsor’s projected income and expense statement — a forecast of cash flow forward across the anticipated hold period, rather than a record of what already happened. It’s the document that turns the T-12 and rent roll into an actual return projection for investors.
What should I check on a pro forma?
- Year 1 income and expenses vs. the T-12. The first-year pro forma numbers should generally track reasonably close to the trailing actuals, adjusted for known changes (a tax reassessment, a new insurance policy, planned renovations). If Year 1 already assumes a large jump in income with no clear driver, ask why.
- Renovation or capex assumptions. If the business plan involves unit upgrades, check the assumed cost per unit and the assumed rent premium after renovation. Then ask whether that premium has actually been achieved on comparable units at this property or a similar one the sponsor has run before.
- Vacancy and bad debt assumptions. These should be in a reasonable range for the market and property type — not assumed away.
- How far out the projection runs, and where the biggest swings happen. Pro formas often show steadily improving numbers year over year. Ask which specific line items are driving the improvement, and whether those are things within the sponsor’s control (renovations, lease-up) or things that depend on the broader market cooperating (rent growth, cap rate compression).
A pro forma isn’t wrong just because it’s a projection — every business plan requires one. The goal isn’t to distrust it by default, but to understand exactly what has to go right for the numbers to hold, and how each assumption compares to what the T-12 and rent roll are already showing today.
T-12 vs. Rent Roll vs. Pro Forma: What’s the Difference?
Document | What it shows | Time orientation |
T-12 | Actual income and expenses collected over the trailing 12 months | Historical (the past) |
Rent Roll | Unit-by-unit tenant, lease, and rent detail as of today | Current (right now) |
Pro Forma | Projected income, expenses, and cash flow across the hold period | Forward-looking (the future) |
Read together, these three documents tell a connected story: the T-12 shows where a property has actually been, the rent roll shows exactly where it stands today, and the pro forma shows what the sponsor believes happens from here. Reading them side by side — rather than taking the summary slide at face value — is one of the most useful habits a passive investor can build, regardless of which specific deal or sponsor is involved.
Frequently Asked Questions
Do I need a finance background to read a T-12, rent roll, or pro forma? No. Each document answers a specific, plain-language question — what actually happened (T-12), what’s true today (rent roll), and what’s projected going forward (pro forma). Knowing what to look for matters far more than modeling experience.
What’s the biggest red flag on a rent roll? A large, unexplained gap between in-place rents and market rents, heavy concessions hidden in a net-effective-rent column, or a cluster of lease expirations concentrated in the same few months.
Why doesn’t the T-12 match the pro forma’s Year 1 numbers? Some gap is normal and expected — a tax reassessment at sale, a new insurance policy, or planned renovations can all justify a difference. A large, unexplained jump in income with no clear driver is what’s worth asking about.
Can I ask a sponsor for these documents before investing? Yes. A sponsor confident in their underwriting should be willing to walk you through the T-12, rent roll, and pro forma directly, not just the summary slide in the deck.
Before You Sign Off on the Numbers
You don’t need to rebuild the model yourself. You just need to know which three documents to ask for, what each one is actually telling you, and which few numbers on each one are worth a second look.