Your Biggest Customer May Be Blocking Your Next Raise

Companies do not raise capital simply because demand is rising. They raise it when lenders and investors can see, test and trust how revenue becomes controllable cash.

AVVIA had the sort of revenue number that gets attention.

The US aviation-parts supplier was generating $23 million to $24 million in revenue in early 2024. Yet banks would not extend more credit. The reason was hiding inside the headline: two customers accounted for 95% of AVVIA's income, and those customers could take up to 120 days to pay.

Imagine running a growing company where almost every sale is to two buyers, but the cash from those sales arrives four months later. The order book looks healthy. The bank sees something else: a business whose fate, and whose cash, sits in two other companies' hands.

According to Summar Financial, the US funding provider that financed the transaction, AVVIA used $5 million of factoring, meaning money advanced against invoices, alongside credit insurance. Three months later, Summar reports, AVVIA obtained an $8 million bank line.

That sequence matters more than the numbers. Revenue did not suddenly become real. It became easier for a bank to trust.

Most founders are taught that fundraising is a persuasion exercise. Build growth, tell the market story clearly, show momentum, then choose between equity or debt. There is some truth in that, particularly for early-stage equity. But it becomes dangerously incomplete once a business needs meaningful growth financing.

The awkward question is this: if your revenue doubled tomorrow, would your capacity to raise money double too?

Often, no.

The number that can quietly ruin a raise

The conventional view is simple. Growth proves customers want what you sell. More customers mean more revenue. More revenue means a larger, safer business. Therefore, capital should become cheaper and more available.

A lender does not quite see it that way.

A lender asks whether revenue can be collected, whether it belongs to the company in a legally enforceable way, whether it is spread across enough customers to survive one departure, and whether management can predict the cash arriving next month. Investors ask related questions, even where they are buying shares rather than lending money.

This is cash flow underwriting: judging whether future cash can reliably repay or support capital. It sounds technical. It is really the same judgement you would make before lending a friend money. Do they earn? Is that income dependable? Can you see it? What happens if their biggest source of income disappears?

What surprised us was how often the strongest apparent commercial signal, a famous customer, creates the sharpest financial weakness. The customer may be highly creditworthy. The invoices may be genuine. But if one customer dominates, the company has not diversified its risk. It has concentrated it.

That is why your biggest contract may be the reason you cannot borrow. The contract can be commercially valuable and financially restrictive at the same time.

New South Wales. Photo: Kgbo / Wikimedia Commons, CC BY-SA 4.0.

The retailer with $20 million in sales and too few fundable invoices

A New South Wales fashion retailer had more than $20 million in revenue. About 80% came from one department-store customer.

The retailer's identity is not disclosed in Octet's published case study, so it cannot responsibly be named here. Nor does the study identify the department store. That matters because the evidence is necessarily limited to what Octet, the Australian invoice-finance provider behind the deal, has reported.

At first glance, funding should have been straightforward. A major department store is not a vague prospect in a slide deck. It is a large customer with invoices that can be checked.

The retailer was offered a $3.5 million debtor-finance facility, a form of funding secured against unpaid customer invoices. Then came the clause that changed the value of the offer. The provider would fund no more than 50% of invoices owed by any one customer.

The facility was advertised as $3.5 million. In the retailer's actual customer mix, only about $2.5 million of invoices could be funded.

That is the financeability gap in miniature. The company had revenue. It had invoices. It had a creditworthy customer. It still could not turn all of that commercial activity into usable working capital.

Octet reports that it instead provided a $3.5 million facility with no concentration limit and funded 100% of eligible invoices. The facility expanded to $5 million within three months.

Here is the twist: this was not a story about a weak business being rescued by indulgent capital. It was a story about a generic finance structure failing to match the actual shape of a business.

Founders sometimes ask, “How much capital should I be asking for?” It is a sensible question, but it comes second. First ask: how much capital can this specific funding structure make available against the cash we actually produce? A $3.5 million headline limit is not $3.5 million of availability if its rules exclude most of your receivables.

Growth can create the very risk funders fear

The US food contract-manufacturing business faced an even harsher version of the same problem. Roughly 80% of its revenue came from one dominant client. Its leverage, meaning debt compared with earnings before interest, tax, depreciation and amortisation, rose from three times to 5.5 times in 12 months.

Traditional lenders balked just as the business needed capital to diversify.

First National Capital, the US financing provider that published the case study and structured the deal, does not identify the manufacturer or its dominant customer. Confidentiality prevents a more specific identification. The account should therefore be read as First National Capital's report of its own $5.7 million facility, not as an independently audited company history.

This is where most people stop looking. They see a company needing money because it is growing. The more important question is whether the existing pattern of growth makes conventional money less willing to come in.

First National Capital says its facility included soft-cost coverage and runway for diversification. The point was not merely to keep the company funded. It was to fund an escape route from dependence on the customer that had helped create its growth.

There is a useful distinction here. Some capital finances repetition: buy materials, fulfil an order, collect an invoice, repeat. Other capital finances change: win new customers, build a second sales channel, alter the supplier base or survive the period before a different revenue mix emerges.

A business trapped by one customer often needs the second kind. Conventional lenders may be reluctant because they are lending against the first kind of cash flow, which is precisely the cash flow that is concentrated.

That does not mean concentration makes funding impossible. It means the funding must acknowledge the risk instead of pretending it is not there.

The funder case studies are revealing, but they are also promotional material from the firms that supplied the financing. Do the outcomes generalise? Independent research suggests the underlying problem is not confined to those providers' client books.

A ScienceDirect-published study of Chinese listed upstream firms between 2003 and 2019 found that higher customer concentration was associated with worsening financing constraints. It found that around 15% of firms, especially smaller non-state-owned companies, were particularly vulnerable to the bargaining power of dominant customers.

A separate US study published in the *Journal of Financial Economics* found that firms with concentrated customers faced higher loan spreads, shorter loan maturities and more covenants, meaning lender rules that restrict certain borrower actions.

Put those cases side by side and a pattern appears that none of the reports states quite so plainly: the financier is not punishing growth. The financier is pricing the fact that growth may be controlled by someone else.

When 120 days turns success into a funding problem

AVVIA's problem was not only that two customers supplied 95% of revenue. It was the wait.

Payment terms of up to 120 days meant the business could be busy, profitable on paper and short of cash at the same time. More orders might even increase the problem, because producing more parts requires more cash before customers pay.

This is why an export order, a hospital contract or a major retail account can leave a growing business cash-poor. The best export order can still leave you cash-poor because a sale is not cash until the customer has paid and the company can reliably collect.

According to Summar Financial, factoring and credit insurance changed AVVIA's position. Factoring supplied money against invoices. Credit insurance reduced exposure if a customer failed to pay. Those tools made the receivables less opaque and less risky for the next lender. Within three months, Summar says, the company secured its $8 million bank line.

The popular assumption is that invoice funding is a last resort for distressed companies. The evidence here says something more interesting. It can be a bridge for a high-growth company whose underlying sales are sound but whose risk profile has not yet become acceptable to a bank.

One lender's limit is not the company's limit

A commercial-stage advanced-therapies developer in the United States had another version of the problem: rapid growth and long cash-conversion cycles, the time between spending money and receiving it back from customers.

Its name is not disclosed in Haversine's case study, nor is the national factoring partner that originated the facility. The evidence is therefore attributable to Haversine, the US funding firm that provided a $20 million participation in an $80 million facility, rather than to a named operating company.

Haversine reports that the participation scaled the facility's availability without leaving one capital provider with all the exposure. It enabled continuity of operations while the healthcare-stage manufacturer grew.

The detail is easy to overlook. The facility did not exist because one lender suddenly became less cautious. It existed because the risk was shared.

In Australia, the retailer needed a facility that did not impose a generic concentration cap. In the United States, AVVIA needed invoice funding and insurance before a bank would lend. The advanced-therapies developer needed more than one capital provider to support an $80 million facility.

Different tools. Same lesson.

Financeability is not a medal a company wins once revenue reaches a certain number. It is a moving relationship between how a business operates and what a particular funder can safely support.

China. Photo: CEphoto, Uwe Aranas / Wikimedia Commons, CC BY-SA 3.0.

The myth founders should retire

“Is this the right time to seek venture capital?” founders often ask.

The answer is not a revenue threshold. It depends on the gap between what the business needs money to do and what a prospective investor can verify today. Equity investors may accept more uncertainty if they believe future returns justify it. Venture-debt lenders, by contrast, routinely examine unit economics, customer breakdown, collections cycles and concentration as part of their diligence, according to Venture Debt Hub's description of the process.

That is why a business can be ready for equity but not debt. Or suited to invoice funding but not a conventional bank facility. Or capable of raising money, but only at a price, maturity or set of restrictions that makes the capital a poor fit.

The central mistake is to treat capital as a single market. It is not. It is a set of different promises made to different people.

The evidence does not prove that every concentrated business is unfinanceable. A funder may have an appetite for the risk, insurance may reduce it, or a facility may be structured around it. Nor does it show that diversification alone solves everything. A company can have many customers and still be unfinanceable if it cannot forecast cash, document contracts or show that each sale produces durable economics.

Still, the sequence matters. Growth opens the conversation. Verifiability decides whether it closes.

GI Network's view: Growth is evidence of demand. Financeability is evidence that demand can be converted into cash without leaving the capital provider exposed to a risk the company cannot explain or control.

What operators should build before they need money

Do not wait for lender due diligence to reveal your business model back to you in the form of exclusions, discounts and covenants.

Start with the customer map. Identify how much revenue, unpaid invoices and expected cash each major customer represents. Then test the uncomfortable scenario: if the largest customer pays late, reduces orders or leaves, what happens to payroll, suppliers and debt repayments?

Next, make contracts legible. A funder needs to know what customers owe, when they must pay and whether those payment rights can be enforced. Informal arrangements may be commercially workable until the company needs external capital. Then they become a question mark.

Build a rolling cash forecast that follows the journey from order to cash collection. Do not confuse revenue with available cash. Track payment terms, delays and the cash needed to deliver the next order before the previous one has paid.

Finally, match the funding request to the job. If capital is needed to fulfil invoices, an invoice-backed structure may fit better than selling equity. If capital is needed to diversify away from one customer, explain that transition openly. If the business requires a large facility beyond one lender's comfort, consider whether shared funding exposure is necessary.

This is not simply fundraising readiness. It is the operating discipline that makes a business easier to underwrite.

What experienced investors see first

Investors have a psychological problem founders sometimes underestimate. They are not only judging whether the company can grow. They are imagining the moment the growth plan disappoints.

The first-time founder sees a major customer as validation. The experienced lender sees dependency. The founder sees 120-day terms as the cost of winning business. The lender sees four months in which cash can go missing. The founder sees a large funding limit. The lender sees a concentration rule that makes half the book ineligible.

Neither side is irrational. They are looking at different failure modes.

For investors and lenders, the practical test is to trace one pound of revenue from contract to collection. Who owes it? What proves they owe it? How long does payment take? How much of the company depends on that one payer? What cash must leave the business before that pound arrives? Can management report the answer consistently?

That is also why a near-complete data room may not be enough. Documents are useful, but they cannot repair a cash cycle or turn a single customer into five. The data room was 95% done. The lenders still would not fund captures the distinction: presentation can demonstrate a model, but it cannot substitute for one.

In this situation, GI Network would test the company’s revenue concentration, contracts, collections cycle and cash forecasts before investor outreach; identify which weaknesses can be redesigned; and map the capital sources whose underwriting requirements match the business as it is, not as the pitch deck describes it. That includes rehearsing the questions an investment committee will ask when it sees the largest customer, the ageing invoices and the proposed use of proceeds.

The financeability stack

Before deciding when to raise, use the Financeability Stack. It is a seven-part check built from the cases above.

1. 1.Demand quality: Is growth repeatable, or driven by a small number of fragile relationships?
2. 2.Unit economics: Does each sale leave enough money after delivery to support the business?
3. 3.Revenue enforceability: Are customer obligations clear, documented and collectible?
4. 4.Concentration exposure: What breaks if the largest customer pays late, cuts orders or exits?
5. 5.Cash conversion: How long does cash remain tied up between spending and collection?
6. 6.Reporting reliability: Can management show these answers accurately and consistently?
7. 7.Funding-source fit: Does the requested capital solve the real constraint, and can that funder bear the risk?

If one layer is weak, growth may magnify the weakness. If the layers hold, growth becomes more than an impressive chart. It becomes something capital providers can believe in.