T-12 (Trailing Twelve Months)

What a T-12 Contains

A T-12 lists, usually month by month with a twelve-month total:

• Income: rent actually collected, vacancy and concessions, and other income such as utility reimbursements, parking, storage and fees. The total is effective gross income.
• Operating expenses: property taxes, insurance, utilities, repairs and maintenance, payroll or contract services, management and administration.
• Net operating income: income minus operating expenses, before debt service, depreciation and capital spending. See NOI.

Ask for the T-12 together with the current rent roll and the last two years of tax and insurance bills. The rent roll tells you whether the income in the T-12 is still in place.

Worked Florida Example: A 32-Unit Daytona Beach Property

A seller markets a 32-unit apartment property in Daytona Beach on its T-12: effective gross income of $512,400, expenses of $198,700, and NOI of $313,700. At a 7.0% cap rate, that implies $4,481,429.

The buyer rebuilds the expenses for their own ownership:

Outcome: the property did not get worse; the T-12 described the seller’s cost of owning it, not the buyer’s. The buyer’s offer, and the lender’s loan, follow the normalized NOI. A buyer who paid the asking price on the seller’s T-12 would start ownership with about $110,000 less NOI than the price assumed, and a debt service coverage ratio well below what the loan was sized on.

How to Normalize a T-12

1. Tie income to the rent roll. If the T-12 shows more rent than the current rent roll supports, the difference is gone. If tenants are below market, model the loss-to-lease burn-off separately, not in the T-12.
2. Remove one-time items. Insurance claim proceeds, lease termination fees and back rent collected late are not recurring income. A one-time roof repair is capital, not an operating expense.
3. Replace the seller’s costs with yours: a market management fee even if the seller self-manages, payroll at your staffing level, and current utility rates.
4. Reset Florida property taxes to your purchase price (see below).
5. Use the insurance renewal quote, not the expiring premium.
6. Add reserves even if the seller shows none; lenders will.
7. Compare the result with the broker’s pro forma and explain every difference before you make an offer.

Florida-Specific T-12 Issues

• Property tax reassessment: for non-homestead property, Florida limits annual increases in assessed value to 10%, but the limit resets when ownership changes. A long-held property can carry a tax bill far below what a new owner will pay. Estimate yours with the Florida property tax calculator.
• Insurance: wind coverage on coastal properties can rise sharply at renewal. Get a quote early in due diligence; the Florida insurance estimator gives a first read.
• Storm months: a hurricane can distort a T-12 with lost rent, cleanup costs and insurance proceeds in the same year. Look at the monthly detail, not only the total.
• Seasonality: coastal and 55+ properties can show seasonal occupancy, so a trailing three months (T-3) annualized can mislead in either direction.

What does T-12 mean in commercial real estate?

T-12 means trailing twelve months: a property’s actual income and expenses for the most recent twelve months. It is the standard starting point for net operating income in an acquisition, a loan or an appraisal.

What is the difference between a T-12 and a pro forma?

A T-12 is history: what the property actually collected and spent over the last year. A pro forma is a projection of what it could do under new ownership, often with higher rents or lower expenses. Lenders size loans mostly on the T-12 (or a shorter, annualized recent period), and buyers should be able to explain every difference between the two.

Why does a Florida T-12 often overstate NOI for a buyer?

Two lines usually move after a sale. Non-homestead property taxes are capped at 10% annual increases, but the cap resets on a change of ownership, so a long-time owner’s tax bill can be far below the buyer’s. Insurance renewals, especially wind coverage near the coast, can be much higher than the expiring premium. Self-managed sellers also often show no management fee.

What is the difference between a T-12 and a T-3?

A T-3 is the trailing three months, often annualized by multiplying by four. It shows the most recent run rate, which helps when rents or occupancy have just changed, but it is noisier and can be distorted by seasonality or a single unusual month. Many lenders look at both.

Article Summary

A T-12 (trailing twelve months) is a property’s actual income and expenses for the last twelve months and the starting point for NOI. Buyers and lenders normalize it: tie income to the rent roll, remove one-time items, add a market management fee and reserves, reset Florida property taxes to the purchase price (the 10% non-homestead cap resets on sale) and use the insurance renewal quote. Worked example: a 32-unit Daytona Beach property’s seller NOI of $313,700 normalizes to $203,780, cutting value at a 7.0% cap from $4,481,429 to $2,911,143.

Key Takeaways

• ✓T-12 = the last twelve months of actual income and expenses; the starting point for NOI.
• ✓It describes the seller’s operation; normalize it for yours before pricing.
• ✓Florida: property taxes reset at sale and insurance can jump at renewal.
• ✓Example: $313,700 seller NOI → $203,780 normalized → value $4.48M → $2.91M at 7.0%.
• ✓Always read the T-12 with the rent roll and the monthly detail.

About Michael R. Linton

Michael R. Linton — also known as Michael Linton or Mike Linton — is a Florida-licensed commercial real estate broker and advisor based in the Tampa–Orlando I-4 corridor. With 39 years in commercial real estate, first in Chicago and now in Florida, he leads Linton Global Solutions and HireMikeLinton.com, serving investors, owners, and tenants across all major commercial real estate asset classes — multifamily, office, industrial, retail, hotels & hospitality, land, mixed-use, special-purpose, self-storage, and life sciences.

Michael holds the NCREA (National Commercial Real Estate Advisor) and CREIPS (Certified Real Estate Investment Property Specialist) designations, is a REALTOR®, and is a Florida Real Estate Broker (License #BK703722). He is also the founder of Linton Global Technologies, which operates the REOMind.ai AI-powered REO disposition platform serving a network of banks.

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Works Cited

1. Florida Department of Revenue. "Property Tax Information for Taxpayers." Florida Department of Revenue, https://floridarevenue.com/property/Pages/Taxpayers.aspx. Accessed Oct 21, 2026.
2. Fannie Mae. "Multifamily Selling and Servicing Guide." Fannie Mae, https://mfguide.fanniemae.com/. Accessed Oct 21, 2026.
3. Institute of Real Estate Management. "Income/Expense Analysis Reports." IREM, https://www.irem.org/. Accessed Oct 21, 2026.

Disclosure & Compliance

Disclosure: This article discusses proprietary technology developed by Linton Global Technologies. Michael R. Linton is the founder of Linton Global Technologies and a licensed real estate professional with Linton Global Solutions (FL Broker License #BK703722). This content is for informational purposes only and does not constitute investment, legal, or financial advice.

Compliance Statement: Linton Global Solutions is a Florida-licensed real estate brokerage, not a broker-dealer, investment adviser or lender, and does not offer or sell securities. CREDDS and REOMind.ai provide decision support only. Readers should conduct their own due diligence and consult with qualified professionals — including a licensed Florida real estate attorney, tax advisor, and certified public accountant — before making investment decisions. Past performance does not guarantee future results.