The financial due-diligence checklist for a plant acquisition

The critical adjustment here is quality of earnings (QoE), a specialized review, usually by an accounting firm, that normalizes EBITDAEBITDAEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition → (earnings before interest, taxes, depreciation, and amortizationearnings before interest, taxes, depreciation, and amortizationEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition →) by stripping out one-time or non-operating items. A seller might report EBITDAEBITDAEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition → of $8 million, but a QoE report often finds $1 to $2 million of addbacks that don't hold up: a one-time insurance settlement counted as recurring income, or family payroll run through the business at above-market rates.

Worked example: Seller claims $8.0 million EBITDAEBITDAEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition →. QoE review finds:

• Owner's above-market salary addback: overstated by $300,000
• One-time machine sale gain: $250,000 (non-recurring, should be removed)
• Deferred maintenance not expensed: $200,000

Adjusted EBITDAEBITDAEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition →: $8.0M − $0.3M − $0.25M − $0.2M = $7.25 million

At a common lower-middle-market manufacturing multiple of 6x EBITDAEBITDAEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition → (a rough industry estimate, actual multiples vary widely by sub-sector and deal size), that $750,000 difference changes the valuation by $4.5 million.

Insurance claims history: the early warning system

Buyers request three to five years of insurance claims data, not just current policies. This includes:

• General liability claims (property damage, third-party injury)
• Workers' compensation claims and the experience modification rate (EMR), a number insurers use to price premiums based on a company's claims history relative to industry average; an EMR above 1.0 signals worse-than-average claims
• Product liability claims tied to shipped goods

A rising EMR or a cluster of machine-related injuries often points to underinvestment in safety, which the buyer will need to fix post-close, an unbudgeted cost. This data also cross-references with OSHA's (Occupational Safety and Health Administration) injury and illness records, which larger manufacturing establishments must submit electronically in the US.

Warranty reserves and product liability exposure

If the plant makes precision parts for aerospace or automotive customers, warranty exposure can be significant and slow to surface.

Warranty reserve: an accounting provision set aside for expected future costs of repairing or replacing defective products already sold. Buyers check:

• Has the reserve grown faster than revenue? That suggests quality problems.
• Does the reserve match actual historical claims, or is it understated to flatter the balance sheet?
• Are there open recalls or field campaigns not yet reflected?

A common check: take the last three years of actual warranty payouts as a percentage of revenue, and compare that ratio to the reserve balance as a percentage of revenue. A significant gap is a red flag worth quantifying and, often, negotiating into a price reduction or an escrow holdback (funds held back at closing to cover specific identified risks).

Environmental liabilities

Older machining plants often used solvents, cutting oils, and metal plating chemicals that create soil or groundwater contamination liability under laws like the US Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), also known as Superfund, which can hold current owners liable for contamination even if they didn't cause it.

Standard requests include:

• Phase I and Phase II environmental site assessments
• Any correspondence with the Environmental Protection Agency (EPA) or state environmental agencies
• Underground storage tank records

In Europe, the equivalent framework runs through the Environmental Liability Directive (2004/35/EC) and national environmental permitting regimes, which similarly attach cleanup responsibility to site operators.

Union contracts and labor liabilities

Roughly a large share of unionized US manufacturing employment sits under collective bargaining agreements (CBAs), contracts negotiated between the company and a labor union covering wages, benefits, and work rules. Buyers request:

• The current CBA and its expiration date (a deal closing six months before contract renewal carries negotiation risk)
• Multiemployer pension plan exposure: if the plant contributes to a union pension fund shared across many employers, withdrawing from the deal or closing the plant can trigger a withdrawal liability, a lump-sum payment required under the US Employee Retirement Income Security Act (ERISA) if the buyer stops contributing
• Grievance and arbitration history, which signals shop-floor relations

Withdrawal liability has surprised more than one buyer with a bill running into the millions, calculated by the pension fund's actuaries and often disclosed only on request.

Fixed assets, capexcapexCapital Expenditure (CapEx) is money spent to acquire, upgrade, or extend long-lived assets like equipment, property, or software that deliver value over multiple years.View full definition → backlog, and deferred maintenance

Machining plants live and die by their equipment. Buyers request:

• A fixed asset register with purchase dates and depreciation schedules
• Maintenance logs for critical CNC (computer numerical control) machines
• A capexcapexCapital Expenditure (CapEx) is money spent to acquire, upgrade, or extend long-lived assets like equipment, property, or software that deliver value over multiple years.View full definition → plan: what needs replacing in the next three years, and at what cost

A plant showing flat capexcapexCapital Expenditure (CapEx) is money spent to acquire, upgrade, or extend long-lived assets like equipment, property, or software that deliver value over multiple years.View full definition → for five years while revenue grew is often masking deferred maintenance, deferred maintenance being repairs postponed to preserve short-term cash flow. This shows up later as unplanned downtime, and buyers typically build a catch-up capexcapexCapital Expenditure (CapEx) is money spent to acquire, upgrade, or extend long-lived assets like equipment, property, or software that deliver value over multiple years.View full definition → estimate into their model, reducing the price they're willing to pay today.

Customer concentration and contract terms

Manufacturing revenue is often concentrated: one automotive OEM (original equipment manufacturer) or aerospace prime contractor can represent 30 to 50% of sales. Buyers check:

• Customer contracts for termination clauses and pricing resets
• Historical pricing pressure (annual price-downs are standard in automotive supply chains)
• Accounts receivable aging to spot slow-paying customers

A useful public benchmark for context: the Institute for Supply Management's manufacturing reports give a sense of sector-wide demand trends buyers use to sanity-check a target's growth story.

🎬 [VIDEO: "Quality of Earnings Explained" - youtube.com - search for quality of earnings due diligence explainer videos from M&A advisory firms, which walk through EBITDAEBITDAEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition → addback adjustments with real examples]

Key Takeaways

• Financial due diligence in manufacturing goes beyond the three statements: insurance claims, warranty reserves, environmental records, and union contracts each hide risks that don't show up in a standard P&L.
• A quality of earnings review typically strips real value out of seller-reported EBITDAEBITDAEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition →; expect adjusted EBITDAEBITDAEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition → to come in below the headline number, which directly moves valuation at whatever multiple is applied.
• Environmental liability (CERCLA in the US, the Environmental Liability Directive in the EU) can attach to a buyer regardless of who caused the contamination, making Phase I/II assessments non-negotiable for older industrial sites.
• Multiemployer pension withdrawal liability under ERISA is a frequently underestimated deal risk in unionized plants and should be quantified before signing, not after.