Business, Mid-Market & Industrial

How to Underwrite a Manufacturing Company

Underwrite a manufacturing company by tying adjusted EBITDA to plant capacity, gross margin by product and the ability to pass raw material costs to customers, then deducting true maintenance capex. The metrics that matter most are capacity utilization, gross margin stability, EBITDA less maintenance capex, inventory turns and customer concentration.

What makes manufacturing underwriting different

A manufacturer converts raw materials into products using machines, tooling and skilled labor in a plant. Earnings depend on how full the plant runs, because fixed overhead is spread over volume, and on whether price increases keep pace with material, energy and wage costs. Equipment ages and must be maintained or replaced, so EBITDA overstates cash unless maintenance capex is deducted. Inventory is often large, spread across raw materials, work in process and finished goods, and can include obsolete stock. Customers may be few and powerful, especially OEMs that demand annual price reductions. Quality certifications, environmental permits and workplace safety records affect both risk and the ability to win work.

Lenders look at manufacturing from two angles: cash flow and collateral. Asset-based lenders advance against receivables, inventory and machinery, with borrowing bases and field exams, while cash flow lenders size on EBITDA less capex and set leverage covenants. Both care about customer concentration, margin stability through cycles and the condition of equipment. Equity buyers look for operational improvement: better pricing, lean manufacturing, automation, procurement and add-on acquisitions that fill capacity. Equity may pay for unused capacity as growth potential, while a lender views that same idle capacity as evidence the business is not earning on its fixed cost base.

Key metrics

Capacity utilization

Shows how much fixed plant cost is absorbed by production and how much growth is possible without new capex.

Gross margin by product line

Product-level margins reveal which lines carry the business and which are priced below full cost.

Raw material pass-through

Contracts with index-based pricing or surcharges protect margin when input costs rise; fixed price contracts expose it.

EBITDA less maintenance capex

Equipment wear is a real cost, so cash available for debt is EBITDA after sustaining capex.

Inventory turns and obsolescence

Slow-moving or obsolete inventory overstates assets and borrowing base availability.

Customer concentration

Large OEM or retail customers can dictate pricing and switch suppliers.

Underwriters often scrutinize any customer above about 10 to 15 percent of revenue.

Borrowing base availability

For asset-based loans, eligible receivables and inventory determine how much the company can actually borrow.

Asset-based lenders commonly advance around 80 to 85 percent of eligible receivables and a lower percentage of eligible inventory.

How to underwrite it, step by step

Map revenue and gross margin by product line, customer and plant.
Review customer contracts for pricing terms, raw material pass-through and volume commitments.
Tour the plant and commission an equipment appraisal and maintenance review.
Separate maintenance capex from growth capex using several years of capex history.
Analyze inventory by category, age and turns, and reserve for obsolete stock.
Review environmental permits, safety records and quality certifications.
Commission a quality of earnings review and normalize EBITDA.
Choose between cash flow and asset-based structures and set covenants accordingly.

Due diligence checklist

Audited or reviewed financial statements
Revenue and gross margin by product and customer
Customer contracts and pricing agreements
Bill of materials and standard cost reports
Inventory aging and obsolescence analysis
Accounts receivable aging
Machinery and equipment appraisal
Capex history and maintenance logs
Environmental permits and Phase I ESA
OSHA logs and safety records
Quality certifications and audit reports
Quality of earnings report

Key risks and mitigants

Raw material price increases cannot be passed through.

Review contract pricing mechanisms and stress margin under input cost increases.

Equipment failure or deferred maintenance.

Commission equipment appraisals and inspections, and reserve for capex.

Loss of a major customer.

Review contracts and relationships, and stress the loss of the largest customer.

Obsolete inventory overstates collateral.

Conduct inventory reviews and apply reserves and lower advance rates.

Environmental contamination at older plants.

Order a Phase I ESA and require indemnities or insurance.

Skilled labor shortages.

Assess workforce age, training and wage competitiveness.

Typical financing and deal structure

Manufacturing companies are financed with either cash flow loans sized on EBITDA or asset-based loans secured by receivables, inventory and equipment, and sometimes a combination of an ABL revolver with a term loan. Smaller manufacturers can use SBA 7(a) or SBA 504 loans, with 504 commonly financing plant real estate and heavy equipment. Private equity buyouts often use senior or unitranche debt, with mezzanine debt in larger deals. Equipment loans and sale-leasebacks can monetize machinery and real estate. Covenants include leverage and fixed charge coverage for cash flow loans and borrowing base reporting, field exams and inventory appraisals for ABL facilities.

Red flags

Margins compressing as raw material costs rise without price adjustments.
Large share of inventory aged beyond typical turns.
Capex well below depreciation for several years.
One customer accounts for a large share of revenue with no long-term contract.
Environmental violations or unresolved contamination.

Frequently asked questions

How are manufacturing companies valued?

Manufacturing companies are usually valued on a multiple of adjusted EBITDA, with buyers paying more for stable margins, diversified customers, proprietary products and well-maintained plants. Lower multiples apply to commodity producers, highly cyclical businesses and companies dependent on a few large customers. Buyers also consider the value of real estate and equipment, which can support debt and downside protection.

What is asset-based lending for manufacturers?

Asset-based lending provides a revolving line secured by receivables and inventory, and sometimes equipment, with availability set by a borrowing base. The lender advances a percentage of eligible collateral and monitors it through regular reporting and field exams. ABL often allows more borrowing than cash flow loans for asset-heavy manufacturers with uneven earnings.

Why do lenders deduct maintenance capex for manufacturers?

Machines wear out and must be maintained or replaced to keep producing. If a lender sizes debt on EBITDA without deducting the capex needed to sustain the plant, it overstates cash available for debt service. Lenders review capex history and equipment condition to estimate a normal maintenance capex figure.

What diligence is unique to manufacturing deals?

Manufacturing diligence typically includes plant tours, equipment appraisals, capacity analysis, product-level margin reviews, inventory counts and obsolescence testing, environmental reports, safety records and quality certifications. These areas reveal operational and collateral risks that financial statements alone may not show, especially in older or highly specialized plants.

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Educational content, not investment, credit, legal or tax advice. Benchmarks are common practitioner rules of thumb and vary by lender, market and cycle.