How to Read a Rent Roll and T-12 Before You Buy or Invest in an Apartment Deal

A rent roll is a unit-by-unit list of who lives in a building, what rent they pay and when their lease ends, on one date. A T-12 is the property's actual income and expenses for the last twelve months. Together they show whether the seller's income is real. If you are the sponsor, we built DoorRaise to run the raise, and these two documents are what your investors' questions will come back to.

This explainer belongs to our complete guide to real estate syndication. Our multifamily underwriting basics cover the formulas. Here we stay on one question: how do you read the two documents the seller hands you?

What is a rent roll?

A rent roll is a report from the property management system that lists every unit on a given date. For each unit it usually shows the unit number and type, square feet, tenant name, lease start and end dates, current monthly rent, market rent, deposit held, any balance owed and the unit's status.

It answers questions about the present: how many units are occupied, what the average rent is, which leases end soon and who is behind on rent. It does not say what the property earned last year. A rent roll is also only as good as the system and the person who ran it, so ask for the date it was run and who ran it.

What columns matter most?

What is a T-12?

A T-12 (trailing twelve) is an operating statement showing income and expenses by month for the most recent twelve months. It is the closest thing to a record of how the property actually performed.

The income side usually runs from gross potential rent down through loss to lease, vacancy, concessions and bad debt to net rental income, then adds other income such as utility reimbursements, fees, laundry and parking. The expense side lists taxes, insurance, utilities, payroll, repairs and maintenance, contract services, marketing, administration and management. The result is net operating income (NOI), which is income minus operating expenses before debt payments, depreciation and income taxes.

A T-12 can be shown by month, and the monthly view is more useful than the total. A rising trend, a sudden spike or a one-time item is visible month by month and hidden in the total. Some sellers also show a "T-3" or "T-1" annualized, which is the last three months or the last month multiplied up. That is a projection of the best recent period, not a record of the year.

How do the rent roll and the T-12 differ?

The rent roll looks at one day. The T-12 looks at twelve months. That makes them good checks on each other.

How do you tie them together?

Tying out means checking that independent documents tell the same story. Do these four checks before you trust either one.

1. Rent roll to T-12. Multiply the roll's occupied-unit rent by 12 and compare it with net rental income on the T-12, allowing for the occupancy trend. A large gap needs an explanation, such as a recent rent increase or a lease-up.
2. T-12 to bank statements. Match monthly income on the T-12 to deposits in the property's bank account. Income that never reached the bank is a red flag.
3. Rent roll to leases. Ask for a sample of leases, or all of them for a small building, and match the rent, dates and deposits to the roll.
4. T-12 expenses to source bills. Check property taxes against the tax bill, insurance against the policy or a quote, and utilities against several months of bills.

Many contracts give the buyer an inspection period for this work. The seller's numbers are a claim until your own checks confirm them. See our due diligence checklist for how it fits with the rest of the review.

What are the common red flags?

Most problems fall into a few patterns. None proves a problem alone, but each one is a question to ask.

• No management fee. A seller who manages the property may show no fee or a low one. A lender and any later buyer will charge a market fee, and so should your model.
• Property taxes at the seller's level. In many places a sale triggers reassessment, so the tax bill after the sale can be higher than the seller's. Ask the county how it handles sales.
• Low repairs, payroll or insurance. Numbers that look far below similar properties often mean deferred maintenance or a policy that will cost more when renewed.
• Capital spending hidden in repairs, or left out. Check that big replacements are separated from routine repairs, and that a reserve for replacements is in the model.
• One-time income. Insurance proceeds, a settlement or a one-off fee that is counted as ongoing income.
• Other income growing fast. Utility reimbursements and fees can be real, but growth in them should match the lease terms, and some are limited by local law.
• Vacant units at asking rent. A roll that lists vacant units at the rent the seller hopes to get can overstate potential income.
• Many month-to-month tenants or a cluster of expirations. Income that can change fast is less secure.
• High delinquency or heavy concessions. They lower what is actually collected, even when the roll shows a high rent.
• Round numbers. Expense lines that are the same every month, or all round, can mean estimates rather than actual books.

A worked example (illustrative)

Take a 48-unit building offered at $5,400,000. All numbers below are illustrative and made up to show the process, not a market benchmark.

The rent roll on the date it was run shows 45 occupied units and 3 vacant, so physical occupancy is 45 / 48 = 93.75%. The occupied units pay a combined $49,500 a month, an average of $1,100 against a market rent of $1,200.

The seller's T-12 builds up like this:

On the seller's NOI the price is a 6.63% cap rate ($358,200 / $5,400,000). Net rental income is 577,200 / 691,200 = 83.5% of potential rent, a reminder that "93.75% occupied" and "83.5% of potential rent collected" are different measures.

Now rebuild NOI the way a careful buyer would. The seller manages the property and shows no fee, taxes are at the seller's assessment, and there is no reserve.

Adjusted NOI is $291,672 against the price, a 5.40% cap rate ($291,672 / $5,400,000), not 6.63%. The difference matters for value. If a buyer capitalizes income at 6.5%, the seller's NOI implies a value near $5,511,000 and the adjusted NOI implies about $4,487,000. That is a gap of about $1,024,000 from three adjustments ($66,528 / 0.065).

The point is not that these adjustments are right for every deal. It is that the cap rate in a pitch deck depends on which NOI sits under it. Ask which one it is.

What should passive investors ask the sponsor?

You may never see the seller's documents, but you can ask how the sponsor used them. Add these to your list of questions to ask a sponsor.

1. Is the NOI in the deck the seller's NOI or the sponsor's adjusted NOI, and what changed?
2. Which management fee, tax and insurance assumptions are in the model?
3. How many units are vacant, down or on notice today, and when was the rent roll run?
4. Did you tie the T-12 to bank statements and a sample of leases?
5. How much of the plan depends on closing the gap between current rents and market rents?
6. What happens to the numbers if occupancy and rent growth both come in below plan? See syndication financial projections.

Sponsors owe investors a fair and complete picture of the property. Presenting numbers you know are wrong can create antifraud exposure under Rule 10b-5 and Section 17(a) of the Securities Act, even in a private offering. Your attorney decides how that applies to your documents.

Our take

Our take: the rent roll and the T-12 are the first documents to ask for, and the last ones to take at face value. A cap rate is only as good as the NOI under it.

We think sponsors should show investors the adjusted NOI and the seller's NOI side by side, and say plainly what was changed. Investors rarely mind a conservative number. They mind finding out later that the deck used a flattering one.

We also think a sponsor should be able to say, in one sentence, why the building's income will rise. If the answer is only "rents are below market," look at how many tenants would actually pay more and how much it costs to renovate and re-lease. The multifamily underwriting basics show how to stress that case.

Trade-offs and who this is not for

Doing this review properly takes time and costs money, and it does not remove risk.

• It cannot catch everything. Fraud in a seller's books can be hard to find. A bank tie-out and a sample of leases lowers the risk but does not remove it.
• It is not a substitute for a property inspection. Income documents say nothing about the roof, plumbing or deferred repairs.
• It is not for investors who cannot see the documents. Most passive investors rely on the sponsor's summary. In that case the sponsor's track record and openness matter more. See how to vet a syndication.
• Small buildings have thinner books. Smaller owners may keep records in spreadsheets, which makes tying out harder.

A common mistake is accepting a T-12 that was built for the sale. Ask for the underlying general ledger, or at least bank statements, when the numbers matter.

How DoorRaise fits in

DoorRaise helps sponsors raise equity for apartment buildings with 5+ units under Rule 506(b) or 506(c). We are software, legal document preparation, escrow coordination and verification services. We are not a law firm, broker-dealer, investment adviser, funding portal, bank or escrow agent, and we do not hold investor money. We do not underwrite your deal or review the seller's books for you, and your numbers remain your responsibility.

We charge three flat fees and never take a percentage of the raise or profits. The $500 setup fee covers forming the deal's LLC, investor documents from standardized templates, an escrow account, the deal page and accreditation checks on every investor. The $5,000 closing fee, paid from the funds raised and only if the deal closes, covers sponsor and property checks, the Form D filing and electronic signing. The $3,500 yearly fee covers bookkeeping, the tax return and K-1s. State filing fees are included in the $5,000 closing fee. See pricing.

Ready to raise? Create your free sponsor page or use the free raise planner.

FAQ

What is the difference between a rent roll and a T-12?

A rent roll is a list of every unit, tenant, rent and lease date on one day. A T-12 is the property's actual income and expenses for the last twelve months. The rent roll shows the present and the T-12 shows the past year.

What is a T-12 in real estate?

A T-12 is a trailing twelve-month operating statement. It lists income and expenses by month and ends in net operating income. Buyers and lenders use it to check what a property actually earned.

How do you verify a rent roll?

Match it against a sample of signed leases, the property's bank deposits and the T-12. Ask when the rent roll was run and by whom, and ask for a certified copy from the seller if the contract allows it.

What is loss to lease?

Loss to lease is the difference between the market rent for occupied units and the rent the tenants actually pay. It shows how far current rents sit below market, and it is also the room a new owner hopes to capture when leases renew.

What is the difference between physical and economic occupancy?

Physical occupancy is the share of units with a tenant. Economic occupancy compares the rent collected with the rent the property could earn if every unit were leased at market. The second figure is lower when there are concessions, bad debt or rents below market.

Should NOI include a management fee if the owner manages the property?

Most underwriting includes a market management fee even when the owner manages, because a lender or a later buyer will. Leaving it out raises NOI and the apparent cap rate.

Can a sponsor change the seller's NOI?

Yes, and a careful sponsor does. They adjust expenses and income to what they expect to happen under their ownership, and they should tell investors which numbers are the seller's and which are their own.

Sources

• 17 CFR 240.10b-5 (Rule 10b-5, antifraud)
• 15 U.S.C. 77q (Securities Act section 17, fraudulent interstate transactions)

This article is general information as of October 2026, not legal, tax or investment advice. The numbers in the example are made up. Definitions and practices vary by lender, market and property manager. Talk to a securities attorney about your offering and your own advisers about a purchase. DoorRaise is not a law firm, broker-dealer, investment adviser or funding portal.