Checklist for Reviewing Sheet Metal Supplier Financial Health

Why Supplier Due Diligence Matters Before You Sign

You do not need to audit a sheet metal supplier like a bank. But you do need to confirm they can keep producing for the next few years. A supplier that looks strong on price and capability can still fail if its balance sheet is thin or its material sources are unstable.

This checklist helps you perform supplier due diligence in a structured way. It focuses on financial stability, vendor risk, and supply chain security. Use it before you sign a multi-year contract or commit to a high-volume production run.

Keep the tone practical. You are not deciding if a shop is “good.” You are deciding if it is safe to depend on them for critical parts.

Check Financial Stability First

Start with the money. You want to know if the supplier can absorb a bad quarter, a raw material spike, or a new order surge.

1. Request the last two years of audited or reviewed financial statements. Ask for income statements and balance sheets. Look for consistent revenue and reasonable gross margins.
2. Check their cash flow. A profitable shop can still run out of cash if customers pay slowly and suppliers demand upfront payment.
3. Review debt levels. High debt is not always bad, but it can limit flexibility. If debt is growing while revenue is flat, that is a warning sign.
4. Ask about credit terms. If a supplier only offers net 30 or net 60, ask why. If they push for prepayment or letters of credit, that can signal cash strain.
5. Verify business registration and tax status. Confirm the legal name, address, and tax ID match what they send on invoices.

Red flags: refusal to share financials, frequent ownership changes, sudden drops in headcount, or a pattern of late payments to suppliers. You can check a supplier’s reputation through trade references and payment history. If several customers report payment delays, that is a vendor risk.

Assess Vendor Risk and Supply Chain Security

A sheet metal fabricator depends on steel, aluminum, coatings, and specialized tooling. If any of those break, your delivery date breaks.

1. Identify their primary material suppliers. Ask how many approved sources they have for each alloy or gauge.
2. Check their sub-tier suppliers. Do they outsource CNC cutting, bending, or welding? If so, who are those subcontractors? Are they single-sourced?
3. Look at their inventory policy. Do they hold stock for common materials? If they buy only to order, a mill delay can stop your production.
4. Review their logistics. How do they ship? What are their backup carriers? Ask about their plan if a port or rail line is disrupted.
5. Check their capacity buffer. A shop at 95 percent capacity has no room for a surge. A shop at 70 percent can absorb a delay without missing your deadline.

Red flags: single-source material suppliers, no backup logistics, or a supplier that cannot explain how they handle a two-week mill delay. If they say “we just order it and it arrives,” that is not a plan.

Review Insurance and Contract Protections

Financial health is one thing. Liability protection is another. You want to know who pays if something goes wrong.

1. Confirm their general liability coverage. Ask for a certificate of insurance. Check the limits. They should be able to cover your product liability needs.
2. Check product liability insurance. This protects you if a defective part causes an injury or property damage.
3. Review workers compensation coverage. This protects your company from claims if an injury occurs at their site.
4. Look at their contract terms. Check the force majeure clause. What happens if a natural disaster or supply disruption stops production?
5. Check the termination clause. Can you exit the contract if they miss multiple deadlines or fail quality audits?

Red flags: low liability limits, a contract that locks you in for three years with no exit, or a force majeure clause that only protects the supplier. If their terms are heavily one-sided, negotiate before you sign.

Check Payment Terms and Cash Flow Alignment

Payment terms are part of supplier due diligence. They tell you how much cash the supplier holds and how much risk you carry.

1. Compare their payment terms to industry standards. Net 30 is common. Net 60 is acceptable for long-term contracts. Prepayment is a red flag unless the materials are custom and scarce.
2. Ask about their credit insurance. If they use a credit insurance provider, that suggests they are managing vendor risk.
3. Review their invoice cycle. Do they invoice at shipment, at production start, or at milestones? Early invoicing can pressure your cash flow.
4. Check for hidden fees. Setup fees, tooling fees, and rush fees can add up. Make sure they are itemized and agreed before production.
5. Align your payment terms with your customers. If your customers pay net 60 and your supplier demands net 30, you carry the cash gap. That is a supply chain security issue.

Red flags: a supplier that demands prepayment for standard materials, or a supplier that cannot provide a clear invoice breakdown. If they push for off-contract payment, treat that as a serious vendor risk.

Use a Structured Scoring Table

Do not rely on gut feeling. Score each area on a simple scale. Use this table to track your findings during supplier due diligence.

Area	What to Check	Weight	Score (1-5)	Notes
Financials	2-year statements, cash flow, debt	30%
Materials	Approved suppliers, inventory buffer	25%
Logistics	Backup carriers, shipping plan	15%
Insurance	Liability, product, workers comp	15%
Contract	Termination, force majeure, fees	15%

Score 5 as strong, 1 as weak. Multiply each score by the weight. A total above 4.0 is a good sign. A score below 3.0 means you need to negotiate or find another supplier.

Red flags: any single area scoring 1 or 2. Even if the financials are strong, a single-source material supplier can kill your supply chain security.

Final Verification Steps

Before you sign, do one last check.

1. Call two existing customers. Ask about on-time delivery and communication. Do not ask if they are “happy.” Ask if they would reorder.
2. Visit their facility if possible. Look at the shop floor. Are machines maintained? Is the shop organized? How many people are on the floor?
3. Check online reviews and industry forums. Look for patterns, not one-off complaints.
4. Verify their capability statements match their actual inventory. If they claim a 50-ton press brake, ask to see it.
5. Confirm their quality systems align with your needs. If you need ISO 9001, get the certificate and check the scope.

Red flags: a supplier who cannot provide customer references, or a shop floor that looks disorganized and under-staffed. If the facility does not match their capability statement, that is a vendor risk.

When to Walk Away

There are situations where you should stop the process. Do not sign if:

• The supplier refuses to share financials or insurance certificates.
• Their contract terms are heavily one-sided and non-negotiable.
• They have no backup material suppliers and no logistics plan.
• Their payment terms force you to carry excessive cash risk.
• Their facility visit contradicts their capability claims.

If you encounter any of these, treat them as stop conditions. You can always negotiate. You cannot fix a broken balance sheet or a missing insurance policy after you sign.

Supplier due diligence is not about finding a perfect shop. It is about finding a shop that can survive the next two years and keep your parts moving. Use this checklist to make that decision with facts, not hope.