How to Evaluate a Supplier's Financial Health

The exposure runs backwards, and that changes what you look for

With a customer, your exposure is money already owed: the invoice is out, the goods are gone, and the question is whether you get paid. With a supplier, your exposure is money paid in advance, work half-finished, tooling that only they hold, and a production line that stops if they do. The dollar amounts are often smaller and the consequences often larger.

That flips the emphasis. On the customer side, the most predictive signals are behavioural — how they pay you, right now, in your own ledger. On the supplier side you rarely have that. You are paying them, so their payment behaviour tells you nothing about their solvency, and your ledger holds no early warning at all. You have to get it from the financials and from the world.

The second difference is concentration, and it points the other way too. With a customer you worry about how much of *your* receivables sit with them. With a supplier you should worry about how much of *their* revenue sits with you — and about whether you are the only one who can replace them quickly.

• Ask what you would lose on day one if they stopped: deposits, tooling, work in progress, schedule.
• Separate spend from exposure. A £40,000-a-year supplier holding your only mould is not a £40,000 risk.
• Rank suppliers by replacement time, not by spend. That list is usually a surprise.

What to request, and what you will actually get

Ask for three years of financial statements, the most recent interim accounts, and a bank reference. From a mid-sized private supplier you will often get one year, unaudited, prepared for tax rather than for you. That is normal and it is still worth having — but it changes how you read it.

Tax-prepared accounts are usually optimised to show low profit. Owner compensation, related-party rent, and discretionary expenses are the usual places profitability disappears into, and none of them is evidence of a weak business. Ask for an add-back schedule if profitability is the crux. If they will not provide one, treat the profit line as a floor rather than a measure.

Whatever you receive, note the age of it. Statements more than fifteen months old describe a company that may not exist any more, particularly through an interest-rate or input-cost shift. An old statement is not an answer to the solvency question; it is a starting point for a conversation.

• Three years if you can get it — two points make a line, three make a trend.
• The most recent interim accounts matter more than a polished year-end from eighteen months ago.
• A bank reference is cheap, fast, and tells you whether the facility is being used at its limit.
• Note the preparation basis: audited, reviewed, or compiled for tax. They are very different documents.

Liquidity first: can they fund the work you are about to give them?

For a supplier, liquidity is the question that matters most and the one people check last. Almost every supplier failure is a cash failure before it is a profit failure — the order book is full, the margin is fine, and there is no money to buy the material.

Start with working capital and the quick ratio. Working capital below zero on a company that has to buy materials before it can invoice you is a live problem, not a ratio. A quick ratio under 1.0 means they cannot cover near-term obligations without selling inventory, which for a manufacturer means selling stock they need to fulfil your order.

Then size the order against the balance sheet. If you are about to place work worth a meaningful fraction of their annual revenue, ask directly how it will be funded — and whether they need a deposit, a facility, or extended terms from their own suppliers to do it. A supplier who cannot answer that question has not thought about it, and you will find out later.

• Working capital = current assets − current liabilities. Negative on a materials-buying business is a red flag.
• Quick ratio under 1.0 means near-term obligations depend on selling inventory.
• Compare the order size to their annual revenue. Above roughly 10–15%, ask how it is funded.
• Watch for a rising overdraft alongside flat revenue — the facility is doing the work profits should.

Leverage: who else has a claim on them

Debt matters less for a supplier than it does for a customer, right up until it matters entirely. What you are looking for is not whether they borrow — most healthy companies do — but whether the lender is now the party who decides their future.

Two things to read. Leverage against tangible net worth tells you how much cushion absorbs a bad year; goodwill and intangibles should come out, because they will not pay anyone in a wind-down. Interest coverage tells you whether the business services its debt out of trading or out of hope. Coverage under about 2x on a cyclical business means a modest downturn puts them in breach.

Then look for secured lending against the assets you depend on. A blanket lien, invoice discounting, or a charge over plant and equipment changes what happens if things go wrong: the lender takes the machine, and the fact that your tooling is bolted to it becomes your problem. This is public information in most jurisdictions and almost nobody checks it.

• Leverage against tangible net worth, not total equity — take out goodwill and intangibles.
• Interest coverage under ~2x on a cyclical business is thin.
• Check for filed security: UCC in the US, Companies House charges in the UK, equivalents elsewhere.
• Invoice discounting is not a warning sign by itself. Invoice discounting plus stretched payables is.

Cash generation: the number that actually predicts survival

If you read one thing, read whether the business converts profit into cash. Operating cash flow that persistently trails net income means the profit is real on paper and unavailable in practice — usually trapped in receivables the supplier cannot collect or inventory they cannot move.

Then look at free cash flow, which is operating cash flow after the capital spending the business needs to keep running. An equipment-heavy supplier with strong EBITDA and no free cash flow is funding replacement machinery out of borrowing, and that works until the facility is reviewed.

For suppliers specifically, watch their own payables. Days payable outstanding stretching year on year means they are financing themselves with their suppliers' money — which is a warning about their liquidity, and also a signal about what their *own* supply chain is about to do. A supplier whose materials get held is a supplier who cannot deliver to you, whatever their order book says.

• Operating cash flow versus net income, over three years. Persistent divergence is the tell.
• Free cash flow = operating cash flow − capital expenditure. Chronic negative on a mature business needs an explanation.
• Their DPO stretching is an early warning about their supply chain, not just their liquidity.
• Composite tools like the Z-Score formalise exactly this blend — useful as a second opinion, not a verdict.

The supplier-specific signals nobody reads in the accounts

Some of the most predictive information about a supplier is not financial at all, and the credit-analysis habit of staying in the statements will miss it.

Customer concentration on their side is the big one. A supplier who derives half their revenue from one customer is one contract loss away from a solvency event, and that contract is usually not yours. Ask. Most will tell you, and the ones who will not have told you something.

Then: capital expenditure that has stopped, which on a manufacturer means the machines are ageing and a replacement cycle is being deferred; headcount falling while revenue holds, which means the work is being done by fewer people and quality is about to move; and the site visit, which remains the highest-information hour available and costs nothing but travel. Tidy stockroom, maintained equipment, people who know what they are doing — none of it appears in a ratio and all of it is real.

• Ask what share of their revenue their largest customer represents.
• Capex that stopped two years ago on an equipment-heavy business is a deferred problem, not a saving.
• A key-person business where one named individual holds the technical knowledge is a risk the accounts never show.
• Visit. An hour on site tells you things three years of statements will not.

When they will not give you financials — which is most of the time

Plenty of private suppliers simply decline, and refusing to trade with all of them is not a strategy. The question becomes what you can learn without them, and how you price the uncertainty.

Public filings are the first stop and are more informative than people expect: filed accounts where the jurisdiction requires them, registered charges, county court or district judgments, tax liens, and the filing history itself. A company that has stopped filing on time, changed auditors twice, or shortened its accounting period is telling you something. A commercial bureau report adds trade payment behaviour — how they pay *their* suppliers — which is the closest available proxy to the behavioural signal you would have on a customer.

Then manage the risk commercially instead of analytically: hold less deposit, shorten the exposure, dual-source the part, keep buffer stock on the long-lead item, or take a step-in right on the tooling. These cost something, which is the point — you are pricing an unknown rather than pretending it is not there.

• Filing history and registered charges are public in most jurisdictions and rarely checked.
• Bureau trade data shows how they pay their own suppliers — the nearest thing to behavioural evidence.
• Reduce deposits and progress payments where you cannot verify solvency.
• Dual-source, buffer, or secure step-in rights on tooling. Uncertainty is a cost, so budget it.

Turning the analysis into a decision

Analysis that does not change what you do is a filing exercise. Tier your suppliers on two axes and let the tier decide the treatment, exactly as a credit policy does with risk bands.

The first axis is what a failure costs you — replacement time and schedule impact, not annual spend. The second is financial strength from the work above. The critical-and-weak quadrant is small in every portfolio and it is where the entire risk sits; it deserves named ownership, quarterly review, and an actual contingency plan rather than a note in a spreadsheet. Everything else can be reviewed annually at onboarding depth or lighter.

Write down what a review triggers, before you need it. A supplier moving into that quadrant should cause something to happen: a conversation, a second source qualified, a deposit reduced, a contract term changed. If crossing the threshold produces no action, the tiering is decoration and the next failure will be as much of a surprise as the last one.

• Axis one: replacement time and schedule impact. Axis two: financial strength.
• Critical + weak is usually under 5% of suppliers and nearly all of the risk.
• Give that quadrant a named owner and a review cadence, not a colour on a chart.
• Define in advance what entering it triggers — otherwise nothing happens.

When this is not worth doing

The honest close, because the effort is real and a guide that pretends otherwise is selling something.

If a supplier is genuinely interchangeable — commodity input, several qualified alternatives, short lead time, no deposit, no tooling — then their solvency is not your problem. They fail, you buy elsewhere on Tuesday. Running financial analysis across a long tail of suppliers like that consumes the attention the critical few actually need, and produces a folder nobody opens.

The work earns its keep where replacement is slow, the deposit is real, the tooling is theirs, or the part is single-sourced. In most portfolios that is a few dozen suppliers, not the whole master. Start there, do it properly, and leave the rest to the ordinary commercial relationship.