Guide
How to Read a Real Estate Offering Memorandum (OM): What to Trust and What to Re-Underwrite
An offering memorandum (OM) is the seller-prepared marketing package for a commercial property — a broker's sales document, not an audited disclosure. Reading it well means separating verifiable facts (the rent roll, trailing financials, lease abstracts) from the broker's proforma and stated assumptions, then re-underwriting the deal from the source documents rather than accepting the pitch. The outcome is your own defensible view of in-place NOI, achievable upside, and a price you'd actually pay.
What an Offering Memorandum Actually Contains
An OM is assembled by the listing broker to sell the asset, so it is organized to lead with the story and bury the friction. Almost every OM follows the same skeleton, and knowing the sections tells you where the real data lives versus where the marketing lives.
- •Executive summary and investment highlights — the narrative pitch (location, 'value-add' thesis, projected returns). Persuasion, not underwriting.
- •Property description — unit mix, square footage, year built, construction type, parking, amenities. Verify against the survey and physical inspection.
- •Financial section — trailing operating statements (T-12 or T-3 annualized), a rent roll, and the broker's stabilized proforma. This is the core; treat the historicals and proforma very differently.
- •Market and demographic data — submarket rent comps, sale comps, population/job growth. Cherry-picked to support the price; pull your own comps.
- •Debt and financing assumptions — sometimes an assumable loan or suggested new debt terms. Confirm directly with the lender or servicer.
- •Offering process — call for offers, guidance price (or 'unpriced'), timeline, contact info.
What to Trust (Mostly) vs. What Is Pure Marketing
The reliability of an OM falls on a spectrum. Source documents that a buyer will later verify in diligence are usually accurate because the broker knows they'll be checked. Forward-looking figures the broker controls are advocacy. Anchor your read on the former and discount the latter.
- •Trust with verification: the current rent roll, trailing 12-month operating statements, lease documents, and the physical unit/SF count. These become reps or get verified in diligence, so brokers rarely fabricate them — but confirm every line against actuals.
- •Scrutinize heavily: the stabilized proforma. Broker proformas systematically show aggressive rent growth, understated vacancy/credit loss, thin repairs and maintenance, no real capital reserve, and a low 'market' cap rate on exit. It is a best case, not a base case.
- •Distrust by default: 'proforma cap rate,' loss-to-lease upside, and any return figure (IRR, equity multiple, cash-on-cash) computed on the seller's assumptions. Rebuild these on your own numbers or ignore them.
Reconcile the Rent Roll, T-12, and Proforma Against Each Other
The single most valuable OM exercise is tying the three financial artifacts together. The rent roll shows what tenants pay today; the T-12 shows what the property actually collected and spent over the last year; the proforma shows what the broker claims it could earn. Discrepancies between them expose the deal's real risk.
- •Does annualized in-place rent from the rent roll roughly match the T-12 revenue? A large gap signals concessions, high vacancy, bad debt, or a rent roll dated to look fuller than reality.
- •Recompute in-place NOI yourself from the T-12: actual collected revenue minus actual operating expenses, excluding debt service, depreciation, capex, and owner add-backs. Then divide by price for the true in-place cap rate — usually well below the headline number.
- •Check the expense ratio against norms for the asset class and market (often ~35–50% of EGI for multifamily). A suspiciously low ratio means the seller stripped costs (management, reserves, deferred maintenance) that you'll actually incur.
- •Test every proforma upside line: is the rent bump supported by real signed-lease comps, or by a wishful 'market rent' column? Are taxes reassessed to your likely post-sale basis, not the seller's frozen assessment?
The Traps Brokers Bury (and How to Catch Them)
Beyond optimistic assumptions, OMs contain recurring structural tricks. None are necessarily dishonest, but each inflates the apparent return if you accept it uncritically.
- •Property taxes at the seller's basis: in reassessment states, your taxes jump on sale. Re-underwrite taxes at the reassessed value from your purchase price.
- •No reserves or capex line: a value-add building with deferred maintenance needs a real per-unit reserve and a capital budget. Add them back in.
- •T-3 or T-6 annualized instead of T-12: annualizing the best recent months hides seasonal vacancy and lumpy expenses. Demand the full trailing twelve.
- •'Other income' padding: fees, RUBS, and ancillary income projected far above what the T-12 supports.
- •Below-market management fee (or none): insert a market fee (typically 3–5% of EGI) even if the current owner self-manages.
- •Exit cap rate lower than the entry cap rate: assumes you sell at a richer valuation than you buy — rarely conservative. Hold exit cap at or above entry.
Re-Underwrite From the Source Documents, Not the OM
The OM's job is done once it points you to the underlying documents. Your job is to rebuild the deal in your own model using the rent roll, actual leases, and trailing financials as inputs — never the broker's proforma as a starting point. Every number in your underwriting should trace to a source you can defend to an investment committee or lender.
- •Build in-place NOI from actuals first, then layer a separate, explicit value-add scenario so upside is visible but never blended into the base case.
- •Run scenarios and a two-variable sensitivity (rent growth vs. exit cap, or rent vs. vacancy) so the deal's dependence on optimistic assumptions is quantified, not hidden.
- •Size debt independently against your NOI using DSCR, LTV/LTC, and debt-yield constraints — the OM's suggested financing is a starting rumor, not terms.
- •Origentic's glass-box AI extraction pulls the rent roll, T-12, and OM line items with per-field provenance and mandatory human sign-off — nothing is auto-applied — and its deterministic engine recomputes NOI, cap rate, DSCR, and returns from those verified inputs, so every number traces to a source rather than to the broker's proforma.
Step by step
- 1
Read the executive summary for the thesis, then set it aside
Absorb the broker's story — the location pitch, the value-add angle, the return projections — so you know what they want you to believe. Then treat it as a hypothesis to test, not a fact to accept.
- 2
Extract the rent roll, trailing financials, and lease terms
Pull the current rent roll, the full T-12 (insist on twelve months, not an annualized T-3), and any lease abstracts. These source documents, which you'll verify in diligence, are your reliable inputs.
- 3
Reconcile the rent roll against the T-12
Annualize in-place rent from the rent roll and compare it to actual T-12 revenue. Investigate any material gap — it usually reveals vacancy, concessions, or bad debt the OM downplays.
- 4
Recompute in-place NOI and the true cap rate
From the T-12, subtract actual operating expenses from actual collected revenue (excluding debt service, depreciation, capex, and owner add-backs). Divide by the asking price for the real in-place cap rate — expect it below the headline.
- 5
Normalize the expenses the seller stripped
Add back a market management fee, a per-unit capital reserve, realistic repairs and maintenance, and — critically — property taxes reassessed to your purchase basis. Check the resulting expense ratio against asset-class norms.
- 6
Rebuild the upside as a separate, sourced scenario
Test every proforma rent bump against real signed-lease comps you pulled yourself. Model the value-add as an explicit scenario layered on top of in-place NOI, never blended into the base case.
- 7
Size debt and stress-test the returns
Size financing independently against your NOI using DSCR, LTV/LTC, and debt yield. Run a two-variable sensitivity on the assumptions that matter most (rent growth vs. exit cap) and hold the exit cap at or above the entry cap.
- 8
Write your own view and decide the price
Document the deal in an IC-style memo: your in-place NOI, your assumptions with sources, the base and upside scenarios, and the price at which the returns clear your hurdle — not the broker's guidance price.
Frequently asked questions
- Is an offering memorandum a legally binding or audited document?
- No. An OM is a broker-prepared marketing package, typically accompanied by a disclaimer that its figures are unverified and not warranted. It carries no audit and creates no binding representations — those come later in the purchase agreement and diligence. Treat every number as a claim to verify, not a fact.
- Why is the broker's proforma cap rate almost always higher than reality?
- The proforma cap rate divides a projected stabilized NOI — built on aggressive rent growth, low vacancy, thin expenses, and no reserves — by the price. Because the numerator is inflated, the cap rate looks attractive. Recompute NOI from the actual T-12 and reassess taxes to your basis, and the in-place cap rate is usually materially lower.
- What's the difference between a T-12 and a T-3 in an OM, and which should I demand?
- A T-12 is the trailing twelve months of operating statements; a T-3 (or T-6) is the trailing three or six months, often annualized. Brokers favor annualized T-3s because multiplying the strongest recent months hides seasonal vacancy and lumpy expenses. Always demand the full T-12 so you see a complete operating cycle.
- Which OM numbers actually get verified during due diligence?
- The rent roll, leases, and trailing operating statements are confirmed via estoppel certificates, lease audits, and the seller's books — so brokers rarely fabricate them. The proforma and projected returns are never verified because they're forward-looking assumptions. That's why source historicals earn cautious trust and the proforma earns none.
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