What is leakage in a locked-box deal?

Leakage is value extracted by sellers after the locked-box date outside permitted exceptions: dividends, management fees, related-party payments, asset transfers, or non-ordinary cash outflows that should reduce equity value.

How does PPA diligence relate to quality of earnings and working capital?

QoE supports the earnings base used to price the deal. Working capital diligence sets the NWC peg and normalizations. PPA diligence wires those outputs into the SPA formula, definitions, estimates, and true-up process.

What red flags reprice purchase price adjustments?

Vague indebtedness definitions, cash that is not free, missing debt-like items, aggressive NWC seasonality, unpermitted leakage, weak estimate processes, and dispute rules that favor one-sided experts.

When should PPA diligence start?

From confirmatory financial diligence through SPA drafting and pre-close estimates. Public-info screening can start earlier to flag net debt, concentration, and cash-quality issues that will hit the bridge.

Is a first-pass report enough for SPA closing mechanics?

No. A structured public-info pack helps IC and counsel prioritize risks, but purchase-price schedules, accounting policies, and closing certificates still need specialist financial and legal work.

What does a public-info first pass cost?

dodilligence structured screening reports start at $49. Full specialist packages for complex locked-box or multi-jurisdiction completion accounts typically run tens of thousands of dollars.

Financial SPA mechanics · 12 min read

Purchase Price Adjustment Due Diligence

Q: What is the difference between locked box and completion accounts?

A locked box fixes economic risk at a historical balance-sheet date with leakage protections. Completion accounts remeasure net debt and net working capital at or near closing and true up the purchase price after close.

Headline enterprise value is not what the buyer pays in cash. Purchase price adjustment (PPA) diligence tests the bridge from EV to equity value: locked-box leakage, completion accounts, net debt, net working capital, estimates, and true-up risk that reprice deals after signing.

For PE, strategics, lenders, and counsel · Public-info first pass from $49 · Specialist accounting/legal still required for SPA schedules

In this guide: what PPA diligence covers · six pillars · locked box vs completion accounts · red flags · sequencing · cost/timeline · 50-point checklist · FAQ

What purchase price adjustment diligence actually covers

Purchase price adjustment due diligence answers a practical question: when the SPA math runs at closing, will equity value match IC assumptions — or will net debt, working capital, leakage, and definition games move the check by millions?

It sits downstream of quality of earnings, working capital, and debt / net debt work, and upstream of escrow, earnout, and R&W economics. Weak PPA diligence creates silent value leakage even when the business story is clean.

Six pillars of purchase price adjustment due diligence

1. Structure choice

Locked box vs completion accounts (or hybrid): who bears economic risk between signing and close, and how.

2. Net debt bridge

Cash quality, indebtedness inventory, debt-like items, leases, deferred consideration, and trapped cash.

3. NWC peg & policy

Target working capital, accounting policies, seasonality, and items carved out as debt-like.

4. Leakage / permitted payments

Locked-box date, permitted leakage list, monitoring, and recovery mechanics.

5. Estimates & true-up

Closing estimates, statement process, review windows, expert determination, interest on adjustments.

6. Interaction with other price chips

Earnouts, holdbacks, tax attributes, R&W escrows, and purchase-price allocation effects.

Locked box vs completion accounts

Dimension	Locked box	Completion accounts
Economic transfer date	Historical locked-box BS date	Closing (or agreed completion date)
Primary buyer protection	No-leakage covenant + permitted exceptions	Net debt / NWC true-up to definitions
Post-close process	Usually lighter (leakage claims)	Estimate → statement → dispute window
Common failure mode	Hidden leakage / weak monitoring	Definition games + estimate sandbagging
Best when	Clean books, short sign-to-close, PE auctions	Volatile WC, complex capital structure, longer close

Red flags (deal-killer / high / watch)

Signal	Severity	Why it matters
Indebtedness definition omits factoring, deferred rev cash, or guarantees	Deal-killer	Equity value overstated at close
Cash is pledged, trapped, or restricted but counted as free cash	Deal-killer	Net debt bridge fails; funding gap
Locked-box leakage exceptions swallow the protection	Deal-killer	Sellers can extract value lawfully
NWC target ignores seasonality or one-time stretch	High	Buyer funds a working-capital hole
No agreed accounting policies for completion accounts	High	True-up becomes a narrative fight
Estimate process with no buyer visibility pre-close	High	Closing funds wrong; dispute later
Related-party management fees near locked-box date	High	Classic leakage pattern
Minor presentation differences GAAP vs SPA schedules	Watch	Map early; rarely fatal if documented

Sequencing: when to run PPA diligence

Stage	Focus	Output
Pre-LOI / screening	Public net debt signals, cash quality, concentration	Bridge risk hypotheses
Confirmatory	Debt inventory, NWC trends, debt-like items	Draft EV→equity bridge
SPA drafting	Definitions, locked-box date, policies, disputes	Marked PPA schedules
Sign → close	Leakage watch / estimate pack	Closing funds memo
Post-close	Statement review / expert path	True-up settlement

Stress-test the EV-to-equity bridge before SPA lock

Specialist financial packages for purchase-price mechanics, locked-box reviews, and completion-account policies often run $20K–$120K+ inside broader financial DD. A structured public-info first pass on debt signals, cash quality, concentration, and filing red flags is $49 — useful before you fund full schedule negotiation.

Order a diligence report — $49 See sample report

Cost & timeline (indicative)

Approach	Typical cost	Timeline	Best for
Public-info structured first pass	$49–$200	Minutes–hours	Early bridge risk map
Boutique financial PPA / locked-box pack	$15K–$75K	1–3 weeks	Mid-market SPA schedules
Complex multi-entity completion accounts	$50K–$200K+	Weeks–months	Carve-outs, multi-jurisdiction closes

50-point purchase price adjustment due diligence checklist

How PPA diligence feeds the deal decision

Buyers rarely lose deals only because a clause says "purchase price adjustment." They lose value because definitions were vague, estimates were optimistic, leakage was real, or the NWC peg was fantasy. Treat PPA diligence as an underwriting workstream from confirmatory through true-up — not a last-minute schedule attached the night before signing.

FAQ

What is purchase price adjustment due diligence?

It is the workstream that tests how enterprise value converts into equity value at closing: locked-box or completion accounts, net debt and working capital definitions, leakage, estimates, true-up mechanics, and dispute paths.

Locked box vs completion accounts?

Locked box fixes economic risk at a historical balance-sheet date with leakage protections. Completion accounts remeasure net debt and NWC at or near closing and true up after close.

What is leakage?

Value extracted by sellers after the locked-box date outside permitted exceptions — dividends, fees, related-party transfers, and non-ordinary cash outflows that should reduce equity value.

How does this relate to QoE and WC?

QoE supports the earnings base. WC diligence sets the peg and normalizations. PPA diligence wires those outputs into SPA definitions, estimates, and true-up process.

When should it start?

From confirmatory financial diligence through SPA drafting and pre-close estimates; public screening can start earlier for net debt and cash-quality signals.

Common deal-killers?

Vague indebtedness definitions, non-free cash counted as free, missing debt-like items, unpermitted leakage, and weak estimate/dispute processes.

Is $49 enough for closing mechanics?

No — it is a structured first pass for screening and prioritization. SPA schedules still need specialist financial and legal work.

What does specialist work cost?

Boutique locked-box / completion-account packages often run $15K–$75K+; complex multi-entity deals can exceed $100K inside broader financial DD.

Get a structured EV-to-equity risk first pass

Order a multi-section diligence report on your target — useful baseline for net debt, concentration, and filing red flags before SPA bridge negotiation. Not legal or accounting advice.

Order report — $49 Free brief Samples