Trust But Verify

Sellers are not necessarily lying when they hand you a rent roll showing 100 percent occupancy and a clean operating statement. They may genuinely believe those numbers. But the way many owners track their property does not capture everything a buyer needs to know.

Your job in due diligence is to verify the headline numbers and find the gaps. The ten red flags below show up repeatedly.

Red Flag 1: 100 Percent Occupancy Year Round

Real properties have turnover. A 12-unit running at 100 percent for the entire year is statistically unlikely. Either:

  • The owner is keeping units off the rent roll (treating personal/family occupancy as rented)
  • Vacancy is happening but rent loss is not being captured
  • Or genuinely yes, it is a remarkable property

Verify by asking for 24 months of bank statements. Compare deposit count and timing to the rent roll. Missing deposits during turnover periods are normal. Their absence on a 100 percent claim is suspicious.

Red Flag 2: Operating Expenses Below 30 Percent

A residential rental running at 25 percent operating expense ratio is signaling either:

  • Owner is not capturing all expenses (paying out of personal accounts)
  • Deferred maintenance is masking real cost
  • Insurance or property tax is dramatically understated
  • Owner is providing services for free (self-management, family contractor)

Real expense ratios:

  • SFR rentals: 30 to 40 percent
  • Small multifamily: 35 to 45 percent
  • Mid-sized multifamily: 45 to 55 percent
  • Older or distressed product: 50-plus percent

If the seller's expenses look 10 points lower than this band, ask for backup. They may legitimately be efficient. Or they may be missing line items.

Red Flag 3: No Management Fee Listed

Many sellers self-manage and report no management line. That is fine - but only if you also intend to self-manage going forward.

If you will use third-party management, add 8 to 10 percent of collected rent to operating expenses. That changes NOI significantly. A property with $144,000 collected at 100 percent self-managed shows different economics when you layer in $13,500 of management.

Always underwrite to professional management even if you plan to self-manage early. Future-you will hire a manager when you scale.

Red Flag 4: Rent Roll Without Lease Dates

A rent roll showing only current rent without lease start and expiration dates hides:

  • Concentration of leases expiring at the same time (vacancy risk)
  • Month-to-month tenants who could leave with 30 days notice
  • Recent lease-ups that may not represent stabilized rent

Request a rent roll with lease start, lease expiration, security deposit, and lease type (annual vs. month-to-month) for every unit.

Red Flag 5: Property Tax Below Comparable Properties

If the property tax line on the operating statement looks notably low, the assessor may not have reassessed the property in years. When you buy, the assessor often reassesses at the purchase price, which can dramatically increase your tax bill.

Pull the most recent property tax bill from the county assessor. Compare to similar properties in the area at current sales prices. If your underwriting assumes the historical tax line and the actual post-acquisition tax doubles, your NOI projection is wrong.

This is a common surprise in markets like Texas, Florida, and Illinois with aggressive reassessment policies.

Red Flag 6: Repair And Maintenance Below $200 Per Unit Per Year

R&M of $1,800 on a 12-unit ($150 per unit) suggests:

  • Deferred maintenance is not being addressed
  • Owner is doing the work themselves (free labor)
  • Real repair costs are being capitalized or run through personal accounts

Underwrite to $300 to $600 per unit per year for normal multifamily, higher for older or rougher product.

Red Flag 7: Insurance Below $200 Per Unit Per Year

In many markets, insurance has doubled in the last 3 to 4 years. A property showing $1,800 of insurance on a 12-unit ($150 per unit) is either underinsured (deductible too high, coverage too thin) or the owner has an old policy that will not transfer.

Get a quote in your name and ownership entity from your own broker. Use that quote in underwriting, not the seller's existing policy cost.

Red Flag 8: Utility Bill Backs Inconsistent With Lease Structure

If leases say "tenant pays gas and electric" but the operating statement shows $4,000 of utility expense, either:

  • Some units are landlord-paid (vacant unit utilities, common area)
  • The lease structure changed recently and old utilities are still in the owner's name
  • The seller is double-counting

Reconcile utility expense by line item against current lease language. Adjust your projected NOI accordingly.

Red Flag 9: Recent Capital Expenditures Treated As Operating Expense

A new roof, a new HVAC system, and major plumbing work are capital expenditures, not operating expenses. If the seller has run these through the operating statement, the recent NOI is artificially depressed.

Conversely, if no recent capital has been done, you will need to allocate capital reserves for replacement coming up. Walk the property with a contractor and identify what is at the end of useful life: roof, HVAC, water heaters, parking lot, exterior paint.

Red Flag 10: Seller Will Not Provide T-12 Or Tax Returns

The most reliable income verification is the seller's tax return Schedule E for the past 2 to 3 years. Tax returns show income reported to the IRS, which is the closest you will get to an honest representation.

If the seller refuses to share, that is a red flag in itself. They may have legitimate privacy concerns - or they may know the tax return tells a different story than the rent roll.

Push for at minimum a CPA-prepared T-12. If neither is available, do enhanced verification: count units, walk all of them, get rent quotes from neighboring properties, and underwrite conservatively.

The Due Diligence Checklist

Before signing the purchase agreement, you should have:

  1. Current rent roll with lease dates and security deposits
  2. Trailing 24 months bank statements
  3. Trailing 24 months operating statement
  4. Two years of property tax bills
  5. Current insurance declarations
  6. Copies of all current leases
  7. List of capital expenditures completed in last 3 years
  8. List of major systems (roof, HVAC) with age
  9. Two recent appraisals if available
  10. Survey or boundary documentation

If the seller will not provide most of these items, structure your purchase agreement with a robust due diligence period and the right to walk away.

When To Walk Away

The deal walks itself away when:

  • The owner refuses to provide T-12 or tax returns AND the property has obvious issues on inspection
  • Your reconstructed NOI is 30 percent below the seller's claimed NOI
  • The seller's history with the property is shorter than 12 months (could be a flipper passing a bad deal)
  • The property has unresolved tenant disputes, code violations, or pending litigation

Walking away from a bad deal costs your due diligence money. Closing on a bad deal costs you years.