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L.8 · ADVANCED · 2 MIN

Due Diligence and Purchase Agreement Mechanics

Due diligence is the investigative process that separates informed acquirers from those who discover unpleasant surprises after closing. It’s where deals are made or broken.

Quiz · 5 questions ↓

Diligence areas and their deal breakers

Diligence AreaKey FocusDeal Breakers
FinancialQuality of earnings, working capital norms, off-B/S itemsOverstated earnings, hidden liabilities
LegalLitigation, IP ownership, contract assignabilityMaterial pending lawsuits, IP disputes
TaxNOL carryforwards, transfer pricing, audit historyTax exposures exceeding representations
CommercialCustomer concentration, competitive dynamicsTop customer leaving, market decline
HR/CulturalKey person dependencies, compensation obligationsGolden parachutes, mass departure risk

Quality of Earnings and adjusted EBITDA

Quality of Earnings (QoE) analysis adjusts reported EBITDA for non-recurring items, aggressive accounting, and working capital normalization. The adjusted EBITDA often differs from reported by 10–20%.

Check a target's customer concentration

When analyzing an acquisition target, check: What % of revenue comes from the top 5 customers? What’s the customer contract renewal rate? High concentration = high commercial risk.

Handling a customer-concentration red flag

Due diligence reveals the target’s top customer (30% of revenue) has a contract expiring in 6 months with no renewal commitment. What do you do?

How representations and warranties allocate risk

The purchase agreement’s representations and warranties section is where the seller makes legally binding statements about the business. Every diligence finding either confirms a rep or becomes an exception that shifts risk.

Whether a MAC clause lets the buyer walk

During due diligence, buyer discovers target had $50M of undisclosed liability (environmental contamination). Purchase agreement has MAC clause. Can buyer walk?

Why acquired NOLs shrink: Section 382

Going deeper (optional). Up next: why an acquired pile of net operating losses (NOLs) is usually worth far less than its face amount -- the IRC Section 382 annual usage cap. An advanced aside you can skip on first pass and come back to anytime. Continue when you're curious.

Going Deeper -- acquired NOLs do not transfer freely. When a company with net operating loss carryforwards undergoes an ownership change (broadly, a more-than-50-percentage-point shift in its 5%-shareholder ownership -- most acquisitions qualify), IRC Section 382 caps the ANNUAL amount of pre-change NOLs the buyer can use at roughly the target's equity value at the change date multiplied by the long-term tax-exempt rate, an IRS-published rate that has recently sat in the low single digits (around 3-4%). Illustrative math with an assumed rate: a target with $500M of equity value at a 3.4% rate could use $500M x 3.4% = $17M of NOLs per year; against a 25% tax rate, that shields about $17M x 25% = $4.25M of cash taxes annually. So a $300M NOL balance is not a $75M tax asset arriving at close -- it is a stream of roughly $4M-a-year savings stretched over decades, and dollars arriving in year 15 are worth far less than dollars today. Value acquired NOLs as the DISCOUNTED stream of capped annual savings, never at face amount. The diligence table above lists NOL carryforwards under tax diligence for exactly this reason: the cap turns 'how big is the NOL?' into 'how fast can we actually use it?' AI prompt: "For this acquisition, the target has a large NOL carryforward. Walk me through how a Section 382 ownership change would cap annual usage, and estimate the present value of the NOLs under that cap versus their face amount."

Check your understanding

Sit with the ideas.

A buyer signs a merger agreement to acquire a manufacturing company for $2B enterprise value. Between signing and closing, the target loses its largest customer (18% of revenue) due to a product recall. The buyer invokes the MAE clause. Will the buyer likely succeed in terminating the deal?

Why:
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