If you are a seller reading this, the list below is also a preparation checklist. Buyers who work with FlowExit expect organized documentation. Arriving at the table with clean records shortens due diligence and signals that your stated NOI is defensible.
Why NOI Verification Starts Before You Trust Any Listing
NOI is the engine of multifamily valuation. Cap rate math, DSCR underwriting, and price-per-door comparisons all depend on it. When a seller or listing summary states an NOI figure, that number is a starting point for your investigation, not a conclusion.
Michigan adds a few layers of complexity that make independent verification especially important.
County property tax assessments vary widely across the state. A triplex in Washtenaw County (Ann Arbor) carries a different tax burden than a comparable building in Genesee County (Flint) or Kent County (Grand Rapids). Michigan's Proposal A caps annual assessment increases at the rate of inflation or 5 percent, whichever is lower, but that cap resets to uncapped market value when a property transfers. A buyer who models taxes at the seller's current bill will underestimate the post-sale tax expense, sometimes by thousands of dollars per year. Always request the current tax bill and then run your own estimate of what the assessed value will become after transfer.
Utility costs in Michigan also reflect a cold-climate reality. Heating expenses for a building in Lansing or Traverse City are not comparable to a Sun Belt market. If the seller pays any utilities, you need 24 months of bills to model seasonal swings accurately. A single summer month tells you almost nothing about annual operating costs.
Vacancy patterns in college-adjacent markets like Ann Arbor, East Lansing, and Ypsilanti follow academic calendars. A rent roll pulled in October looks very different from one pulled in July. Historical occupancy data across multiple years is the only way to see the full cycle.
Understanding these Michigan-specific factors is why the document request process matters so much. For a broader look at how buyers approach small multifamily deals before they even reach the document stage, see how to find off-market small multifamily deals.
The Core Financial Documents Every MI Buyer Must Request
These are the documents that directly build or challenge the NOI calculation. Request all of them before you spend money on inspections or legal review.
Trailing 12-Month Profit and Loss (T12). This is the primary NOI document. It shows actual monthly income and expenses for the past year. Do not accept a summary spreadsheet the seller created. Ask for the document their accountant or property management software generated.
Year-to-Date P&L. The T12 shows the past year. The YTD shows the current year through the most recent closed month. Together they reveal whether performance is improving or deteriorating.
Prior Two Years of Annual Financials. One year of data can be manipulated or anomalous. Two additional years give you a baseline for identifying trends in rent growth, vacancy, and expense creep.
Current Rent Roll. This lists every unit, the tenant name, monthly rent, lease start and end dates, and occupancy status. It is the income side of your NOI model.
24-Month Historical Rent Rolls. A single rent roll is a snapshot. Two years of monthly or quarterly rent rolls show you vacancy patterns, rent concessions, and whether the current occupancy is typical or unusually strong heading into a sale.
Six to Twelve Months of Bank Statements. This is the document sellers most often resist providing, which is exactly why you need it. Bank deposits are the ground truth for rental income. Cross-reference total deposits against the rent roll to confirm that scheduled rent is actually being collected.
Utility Bills (24 Months). For Michigan properties, this means heating costs across at least two winters. If the seller pays water, electric, or gas for any units, you need the full two-year history to model operating expenses accurately.
Property Tax Bills (Two Years). Confirm the current bill and note the taxable value versus the state equalized value. The gap between those two numbers tells you how much the assessment could increase after transfer under Michigan's uncapping rules.
Insurance Policy and Premium Details. Current coverage and annual premium. Verify that the coverage is adequate for the property type and that no claims are pending.
Capital Expenditure History (Three Years). Major repairs and improvements should be listed separately from routine maintenance. This document helps you distinguish between a well-maintained building and one where deferred CapEx has been expensed to make NOI look higher.
Operational and Tenant Records That Confirm the Income Story
Financial documents tell you what the numbers are. Operational and tenant records tell you whether those numbers are sustainable.
Executed Lease Copies for All Tenants. The rent roll lists scheduled rent. The lease files confirm what was actually agreed to, including any free rent periods, rent concessions, or non-standard terms. A tenant paying $1,200 per month on a lease that included two months free is not the same as a tenant paying $1,200 with no concessions.
Accounts Receivable Aging Report. This shows outstanding tenant balances. If multiple tenants carry past-due balances, the stated NOI is overstated relative to actual cash collected.
Security Deposit Register. All deposits held by the seller must be verified against lease files. In Michigan, security deposits are governed by the Michigan Security Deposit Act, and the buyer typically assumes responsibility for returning them at lease end. Confirm the amounts before closing.
Property Management Agreement. If the property is professionally managed, confirm that the management fee shown on the P&L matches the actual contract rate. Sellers sometimes use a lower fee in their pro forma than what the contract requires.
Service Contracts. Landscaping, snow removal (a real line item in Michigan), pest control, and any other recurring vendor agreements. These validate expense line items on the P&L and reveal obligations that transfer with the property.
Tenant Applications and Credit Reports. For existing tenants, these documents help you assess whether the current tenant base is creditworthy. A fully occupied building with tenants who have thin credit histories carries more income risk than the rent roll suggests.
Rent roll analysis is a skill in itself. If you want to understand which patterns in a rent roll signal trouble before you even request the full document package, NC multifamily rent roll red flags that kill deals covers the most common warning signs, and the principles apply equally to Michigan properties.
Legal and Physical Documents That Protect Future NOI
These documents do not feed directly into the NOI calculation, but they protect the income stream you are buying.
Title Report. Confirms legal ownership and reveals liens, easements, or competing claims. A property with an undisclosed lien can create closing delays or post-purchase liability.
Site Survey. Verifies boundaries and lot size. Required for title insurance and useful for confirming that any accessory structures or parking areas are within the legal parcel.
Environmental Site Assessment (Phase I). Identifies contamination risks. For older Michigan properties, especially those near industrial corridors in cities like Detroit, Flint, or Kalamazoo, a Phase I is not optional. Contamination can render a property unleasable or trigger remediation costs that dwarf the purchase price.
Property Condition Assessment (PCA). A third-party evaluation of structural integrity and mechanical systems. Roof, foundation, HVAC, plumbing, and electrical are the five systems that produce the largest unplanned CapEx. In Michigan's freeze-thaw climate, foundation movement and pipe failures are more common than in warmer states. A PCA quantifies deferred maintenance so you can negotiate price or escrow accordingly.
Pending Litigation or Eviction Records. Any active legal actions involving tenants or the property itself. An ongoing eviction affects occupancy projections. Pending litigation can affect title or create post-closing liability.
For sellers, understanding what buyers will scrutinize on the physical side is equally important. Small multifamily inspection red flags explains which issues most often derail deals or force price reductions.
How to Cross-Check the Numbers and Spot Discrepancies
Having the documents is step one. Using them to verify the seller's stated NOI is step two.
Income reconciliation. Add up the rent roll and compare it to the T12 income line. Then compare the T12 income line to actual bank deposits. If the rent roll shows $8,400 per month in scheduled rent but bank deposits average $7,600, the difference represents vacancy, concessions, or uncollected rent. That gap directly reduces NOI.
Expense line verification. Take each expense category on the T12 and match it to a source document. Property taxes should match the tax bill. Insurance should match the policy premium. Management fees should match the management agreement. Utility costs should match the utility bills. Any line item that cannot be traced to a supporting document is a red flag.
One-time expense identification. Look for large expenses in a single month that do not recur. A seller who replaced a water heater and expensed it as a repair in one year may have a T12 that understates true NOI. Conversely, a seller who deferred a necessary repair may have a T12 that overstates sustainable NOI. The CapEx history helps you distinguish between the two.
Capital items disguised as repairs. Some sellers expense capital improvements as routine maintenance to reduce taxable income. This lowers reported NOI but also means the building is in better shape than the financials suggest. The reverse is more dangerous: a seller who defers real capital needs while reporting low maintenance expense is presenting an NOI that will not hold after you own the building.
Lease-to-rent-roll reconciliation. Pull one executed lease for each unit and confirm that the rent amount, lease term, and any concessions match what the rent roll shows. Discrepancies between lease files and the rent roll are among the most common sources of post-closing income surprises.
Michigan tax uncapping estimate. Using the current state equalized value and your purchase price, estimate the post-transfer taxable value and recalculate the annual tax expense. If the seller's T12 shows $4,200 in annual property taxes but your post-transfer estimate is $6,800, that $2,600 difference flows directly through to a lower NOI and a lower supportable purchase price.
Sellers who want to understand how buyers will value their property before the document review stage can start with how to calculate cap rates for small multifamily properties in North Carolina. The cap rate mechanics are identical in Michigan, and understanding the math helps sellers present their NOI in a way that holds up to scrutiny.
Preparing as a Seller Before Buyers Ask
If you own a small Michigan multifamily property and are considering a sale, the document list above is your preparation guide. Buyers who receive a complete, organized package move faster and negotiate less aggressively on price. Buyers who have to chase documents assume the worst and price in the uncertainty.
Organizing your T12, rent rolls, lease files, tax bills, and utility history before you market the property is one of the highest-return preparation steps available to a seller. It signals that your NOI is real, your operation is professional, and the deal is worth pursuing.
FlowExit provides education and tools to help small multifamily owners understand what serious buyers expect, so that when a qualified buyer arrives, the conversation starts from a position of credibility rather than suspicion.
This article is educational and does not constitute legal, tax, or financial advice. Consult qualified professionals for guidance specific to your transaction.