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A trailing twelve-month statement is twelve separate data points, not one annual number. The review has to read each month on its own before averaging anything, because a single strong quarter can hide six months of declining performance underneath it. The exchange budget should be built on the trend, not the total.
Why Month-by-Month Beats a Single Annual Figure
A property showing $180,000 in annual net operating income could be trending upward from $12,000 a month to $18,000 a month, or trending downward from $20,000 to $12,000, and the annual total looks the same either way. A lender's underwriter will build their debt-service coverage assumption off the most recent trailing three to six months, not the trailing twelve average, so the review needs to isolate that recent trend before an offer gets priced.
Plotting each month's net operating income on a simple line, rather than reading twelve rows in a spreadsheet, makes a trend reversal visible in a way that a column of numbers alone tends to obscure.
Expense Line Reading for Detroit Property Types
Expense lines deserve as much scrutiny as income lines, since a building that looks efficient on paper can be quietly underfunding maintenance in a way that shows up as a large capital bill the year after purchase. A building coming out of transition, whether that is a Midtown apartment building finishing lease-up or an industrial building along the I-96 corridor that recently lost and replaced a tenant, often carries expense lines distorted by one-time turnover costs, deferred maintenance catch-up, or a temporarily elevated vacancy reserve. Those one-time items need to be separated from recurring operating expense before the statement can be used to project forward income.
Property tax lines deserve particular attention on Detroit-area candidates given how much assessed value can shift block to block after a sale, since a new purchase price can trigger a reassessment that raises the tax line well above what the seller's trailing twelve months shows.
The Line Items a Lender Will Ask About Anyway
Getting ahead of underwriter questions means the T12 review answers them before the lender's own analyst raises them, which shortens the underwriting timeline rather than lengthening it.
- Month-by-month net operating income for the full trailing 12 months
- One-time versus recurring expense items flagged separately
- Property tax trend and any pending reassessment following sale
- Vacancy and concession trend against the same period last year
- Utility expense trend, especially for buildings with deferred capital work
- Management fee structure and whether it changes under new ownership
Turning Financials Into Questions the Seller Can Answer
A T12 review should end in a specific list of seller questions, not a general impression that the numbers look fine. If month nine shows a spike in repair expense, the file should ask what happened that month and whether it recurs, and get that answer in writing before the identification deadline rather than assuming it was a one-time event.
A seller's verbal explanation should always be followed by a request for the underlying invoice or work order, since a repair expense described as routine maintenance sometimes turns out to be the first installment on a larger capital problem the seller would rather not itemize separately. That single follow-up request often does more to protect the exchange budget than any other diligence step in the file.
Matching the Review Timeline to the 45-Day Window
The T12 review for each identification candidate should be substantially complete before the notice goes to the qualified intermediary, since discovering a material expense problem after identification narrows the exchanger's options far more than discovering it during the initial search.
Building the review into the first two weeks of the search, rather than treating it as a final diligence step before closing, gives the exchanger time to request a corrected statement or walk away from a candidate entirely without losing a backup slot on the identification notice.
Common 1031 Exchange Questions
Why does a month-by-month T12 review matter more than the annual total?
An annual net operating income figure can mask a strong trend turning weak, or a weak trend turning strong, and a lender's underwriting typically weights the most recent months more heavily than the full-year average, so the review needs to match that same lens.
What one-time expense items commonly distort a Detroit property's T12 statement?
Lease-up turnover costs, a tenant replacement on an industrial building, and deferred maintenance catch-up after a period of neglected ownership are common distortions that should be separated from recurring operating expense before projecting income forward.
How does a Detroit reassessment after sale affect the T12 review?
A sale can trigger a reassessment that raises the property tax line above what the seller's trailing twelve months shows, so the review should model a post-sale tax estimate rather than relying on the seller's historical tax expense as a forward projection.
What should happen when the T12 review finds an unexplained expense spike?
The finding should become a specific written question to the seller, asking what caused the spike and whether it is expected to recur, with that answer documented before the identification deadline rather than left as an assumption.
When should the T12 review be completed relative to the identification deadline?
It should be substantially complete before the identification notice goes to the qualified intermediary, so a material finding can still change which candidates make the final list rather than surfacing after the exchanger is already committed.



