How to Read a Multifamily Operating Memorandum (OM)

What Is an Operating Memorandum?

An OM (sometimes called an offering memorandum or investment offering) is a 20–80 page document assembled by the listing broker on behalf of the seller. It packages the property's financials, location, unit mix, and market context into a single pitch document intended to attract qualified buyers and set pricing expectations.

Think of it as a real estate prospectus. Like any sales document, it presents the property in its best light. Pro forma numbers often assume full stabilization, below-market expenses, and above-market rents. Your job is to rebuild the financials from scratch using the underlying data the OM provides — not to accept the broker's summary page at face value.

Section 1: The Executive Summary

The executive summary leads with the headline metrics the broker wants you to anchor on: asking price, price per unit, projected cap rate, projected NOI, and sometimes a projected cash-on-cash return. These numbers are always pro forma — meaning they represent what the broker estimates the property could earn under ideal conditions, not what it is actually earning today.

Section 2: The Rent Roll

The rent roll is the most important document in the OM. It is a unit-by-unit table showing each apartment, its type (bed/bath), current rent, lease end date, and occupancy status. A well-formatted rent roll will also show market rent alongside in-place rent, exposing the “loss to lease” — the gap between what the property is currently collecting and what it could theoretically collect at market.

Key things to analyze in the rent roll:

• Lease expiration cliff — if 40% of leases expire in the same 60-day window, you face a concentrated re-leasing risk immediately after close.
• Month-to-month tenants — a high share of MTM leases means the seller has been avoiding renewals to show “value-add” upside, but it also means real near-term vacancy exposure for the buyer.
• Below-market rents — wide gaps between in-place and market rent can represent genuine upside or genuine risk depending on why rents are low (tenant quality, rent control, deferred maintenance).
• Concessions — free rent, move-in specials, or reduced deposits buried in the rent roll signal softness in the market or property-specific leasing difficulty.

Section 3: The T12 Financials

The trailing 12-month (T12) income and expense statement is the closest thing to ground truth in the OM. It shows actual collected revenue and actual expenses over the past year, before any broker adjustments.

Brokers will typically present T12 financials alongside a “pro forma” or “stabilized” column. The pro forma column will show higher income (assuming full occupancy at market rents) and lower expenses (often removing one-time items). Your analysis should start with T12 and work forward from there — not backward from the pro forma.

Common T12 line items to scrutinize:

• Management fees — brokers sometimes understate these or remove them entirely when an owner self-manages. A typical third-party fee is 6–10% of collected revenue. Always underwrite a market-rate management fee even if the current owner self-manages.
• Repairs and maintenance — this line is frequently smoothed. One-time capital expenditures may be removed, or maintenance may be deferred pre-sale to reduce expense totals. A low R&M figure on an older property is a warning sign.
• Capital expenditures — most OM financials exclude CapEx entirely. You will need to underwrite your own CapEx reserve (typically $200–$400/unit/year on a stabilized property, more on older stock).
• Payroll and utilities — check whether on-site staff costs are included. Small properties with a resident manager often bury compensation in non-obvious line items.

Section 4: Rent Comps and Market Overview

The market overview and rent comp section serves two purposes: it contextualizes the property within its submarket, and it supports the broker's pro forma rent assumptions. Treat the broker-selected comps as a starting point, not a conclusion.

Run your own rent comp analysis using CoStar, Apartments.com, or local property management data. Look for comps that are truly comparable on unit size, age, finish level, and location. Brokers tend to cherry-pick the highest-rent comps in the largest radius they can justify.

Extracting the Real Numbers: NOI, Cap Rate, and Vacancy

Once you have reviewed each section, reconstruct the key metrics yourself:

• Gross Potential Rent (GPR) — multiply the number of units by their respective market rents. This is the theoretical maximum revenue at 100% occupancy and market rates.
• Effective Gross Income (EGI) — subtract vacancy and credit loss (typically 5–10%) from GPR, then add other income (laundry, parking, fees). Use the T12 vacancy rate, not the broker's pro forma assumption.
• Net Operating Income (NOI) — subtract all operating expenses from EGI. Use your own underwritten expenses, including a market-rate management fee and CapEx reserve.
• Cap rate — divide your NOI by the asking price. Compare this to market cap rates for comparable properties in the submarket. If the cap rate implied by the asking price requires pro forma NOI to work, the seller is pricing the deal on future value you have to create.

Red Flags to Watch For

• No T12 provided — if the broker only shows a pro forma with no trailing actuals, demand T12 before spending any time on the deal.
• Expense ratio below 35% — on a stabilized multifamily deal, operating expenses typically run 40–55% of EGI. An OM showing 28–32% is almost certainly excluding something (management, CapEx, or payroll).
• Vacancy below 3% — physical vacancy below 3% is unsustainable long-term in most markets. Pro forma models built on 2% vacancy are aggressive.
• Large rent premiums on recent renovations — some brokers use 2–3 recently renovated units to justify a rent premium across the entire rent roll. Verify how many units have actually been upgraded and at what cost.
• Lumpy or missing expense years — if one year has dramatically lower expenses than adjacent years, find out why before relying on it as a baseline.

What to Trust vs. What to Verify

A useful framework: treat anything that benefits the seller as a claim to verify, and anything that hurts the seller as likely understated. Specifically:

• Trust (with verification): unit count, square footage, year built, property tax records, insurance costs, actual lease terms from the rent roll
• Verify independently: market rents, occupancy, expense ratios, management fees, deferred maintenance, capital needs
• Rebuild from scratch: pro forma NOI, stabilized cap rate, value-add rent premiums, projected returns

Next Steps After the OM

If your initial OM analysis supports the asking price, move to a letter of intent with contingencies for full due diligence. During the due diligence period, you should request:

• Two to three years of actual operating statements (not just T12)
• Current, signed rent roll directly from the property management system
• Actual utility bills for common area and owner-paid utilities
• Property tax bills and any pending assessments
• A property condition assessment from an independent inspector
• All current leases

The OM gets you to the table. Due diligence confirms whether the deal holds up once you can see behind the broker's packaging.