noun · /tiː twɛlv/
T12
Also known as: Trailing 12, Trailing Twelve Months, T-12, TTM
Definition
A T12 (Trailing 12 Months) is a financial statement that shows a property's income and operating expenses for the most recent 12 consecutive months. Unlike annual statements that follow calendar or fiscal years, T12s provide a rolling snapshot of actual performance. They're the foundation of underwriting because they show what a property has actually earned—not what the seller hopes it will earn.
Key Insight
"Trust but verify" — A T12 from the seller shows their reported numbers. Smart investors reconcile T12 data against bank statements, rent rolls, and vendor invoices during due diligence to catch discrepancies.
What's Included in a T12
A complete T12 statement breaks down income and expenses month-by-month, allowing you to spot seasonality and trends:
Income Categories
- Gross Potential Rent — Total if 100% occupied at market
- Vacancy Loss — Actual lost rent from empty units
- Concessions — Free rent, move-in specials
- Bad Debt — Rent billed but never collected
- Other Income — Parking, laundry, late fees, pet rent
- Reimbursements — CAM, utilities passed to tenants
Expense Categories
- Real Estate Taxes — Property tax payments
- Insurance — Property and liability coverage
- Utilities — Electric, gas, water, trash
- Repairs & Maintenance — Day-to-day fixes
- Contract Services — Landscaping, pest control
- Management Fee — Typically 3-6% of collected rent
- Payroll — On-site staff if applicable
- Admin & Marketing — Advertising, supplies
T12, T6, T3: Which to Use?
| Statement | Period | Best For |
|---|---|---|
| T12 | 12 months | Stabilized properties, loan underwriting, most acquisitions |
| T6 | 6 months (×2) | Recently stabilized assets, seeing current trends |
| T3 | 3 months (×4) | Value-add after renovations, lease-up properties |
| YTD | Jan–current | Supplemental view, comparing to prior year |
Annualizing Shorter Periods
When sellers provide T3 or T6 data and "annualize" it (multiply to get 12-month estimate), be skeptical. A strong 3 months might not reflect seasonal lows, deferred maintenance, or upcoming lease expirations.
T12 Red Flags to Watch
Income Red Flags
- Spikes in "Other Income"
One-time insurance proceeds or late fee windfalls won't repeat
- Decreasing Vacancy Over 12 Months
May indicate rent concessions or deferred rent not shown
- No Bad Debt Line
Every property has some—if missing, income is overstated
- Rent Roll Doesn't Match T12
Total rent roll income should approximate T12 gross rent
Expense Red Flags
- Abnormally Low R&M
Deferred maintenance becomes your problem after closing
- Missing Management Fee
Self-managed sellers often exclude this—add 4-6% back
- Taxes Based on Old Assessment
Sale triggers reassessment—budget for higher taxes
- CapEx Buried in R&M
Big-ticket items should be below the NOI line
T12 vs. Rent Roll: What's the Difference?
| Aspect | T12 | Rent Roll |
|---|---|---|
| Focus | Historical cash flow | Current tenant status |
| Time Period | Past 12 months | Point-in-time snapshot |
| Shows Income | Yes, with all categories | Only contracted rent |
| Shows Expenses | Yes, detailed breakdown | No |
| Tenant Detail | Aggregated totals only | Unit-by-unit breakdown |
| Lease Terms | Not shown | Expiration dates, options |
| Primary Use | Calculate NOI, underwriting | Tenant analysis, rollover risk |
Best practice: Use both documents together. The rent roll tells you who's paying and when leases expire. The T12 tells you what actually came in and went out. Cross-reference them to verify accuracy.
Standardize Your T12 & Rent Roll Data
CleanRoll.ai extracts and standardizes rent roll and T12 data from any format, making it easy to reconcile and analyze property performance.