Published: 04/30/2026
Last updated: 04/30/2026
Revenue is up. The order book looks strong. You just landed an account you've been chasing for two years. So why is there never any money? Here's why growth causes cash flow problems for product businesses.
This is the part of running a product business that nobody puts in the pitch deck. Growth and cash flow problems don't just coexist — for product brands, they're practically the same thing. The faster you grow, the worse it gets. That's not a bug. It's the model.
UK SME lending reached £17.5 billion in 2025 — the second consecutive year of growth, driven largely by the smallest businesses — according to UK Finance's Business Finance Review. The demand for external finance isn't a distress signal. For product businesses, it reflects a structural reality: growth requires more capital than the business generates in the short term.
What follows isn't a guide on how to fix it. It's an honest look at what's actually happening — and why it keeps happening even when you're doing everything right.
💡 Key takeaways
Cash flow problems in growing product businesses are structural, not a sign of poor management
Profitability and solvency are different things. You can be both profitable and broke at the same time
The problems below affect most product brands scaling past £1M — and get worse, not better, as revenue grows
Understanding the cause comes first. Measuring it and financing around it comes next
You landed a big retail account. Congratulations. You can't afford it.
Everyone celebrates the win. The brand, the team, the investors if you have them. You've earned shelf space with a major retailer. This is what growth looks like.
What it actually looks like: you place a large inventory order in January to fulfill the contract. You ship in March. You invoice in March. The retailer pays on net 90. Cash arrives in June. Meanwhile, you need to reorder for autumn in May.
You've funded six months of a retail account before it's returned a penny.
This is standard. It happens to almost every product brand that enters wholesale. The account isn't the problem — the problem is that nobody models the cash timing before signing the contract. The margin looks great on paper. The cash reality is a different conversation entirely.
The bigger the account, the bigger the gap. And the more accounts you win simultaneously, the more of these gaps you're carrying at once.
Your best business decision is also your worst cash flow decision
At some point, the right move is a larger inventory order. Better unit economics. MOQ thresholds that unlock supplier terms. Preparation for a seasonal peak. It makes complete commercial sense.
It also means your cash is going to be sitting in a warehouse for the next three to four months before it turns back into money.
Inventory is the unique curse of product businesses. Every smart growth decision — bulk buying, early seasonal orders, pre-purchasing to lock supply — is simultaneously a decision to lock up cash. A brand doing £3M in revenue carrying two months of forward inventory has a meaningful chunk of its working capital tied up in stock at any given moment. And as revenue grows, so does that number in absolute terms.
This isn't a perception problem. Days inventory outstanding — the measure of how long cash is tied up in stock — has risen 13.6% for the most cash-intensive sectors in Western markets over the last decade, according to PwC's Working Capital Study 25/26. Cash-intensive businesses are carrying more inventory for longer than they were ten years ago. For product brands, that trend runs in the wrong direction as they scale.
The businesses that handle this well treat every inventory decision as a cash flow decision. Not after the fact — before the order goes in.
Your accountant says the business is profitable. Your bank account disagrees. They're both right.
This is overtrading — and it's the most disorienting thing that can happen to a founder who thought they had the business under control.
Revenue is growing. The order book is full. Margins are healthy. And you're sitting in a finance meeting being told there isn't enough cash to pay next month's supplier invoices on time.
The P&L isn't lying to you. Neither is the bank account. They're measuring different things. Profitability tells you whether revenue exceeds costs over a period. Cash flow tells you whether the money is actually there when you need it. A business can be genuinely profitable and genuinely cash-poor at the same time — if it's growing faster than its cash cycle can support.
Here's a quick diagnostic: if every customer paid you tomorrow, would you have enough cash to fund next month's orders in full? If the answer is no, you're overtrading. That's not a character flaw. It's a mechanics problem. But it's worth knowing.
The consequences of not catching it are significant. Creditors' voluntary liquidations — where directors wind down a business because it can no longer meet its obligations — accounted for 73% of all UK company insolvencies in March 2026, according to the Insolvency Service. These aren't failures that announce themselves. They're businesses that looked fine on the top line until they didn't.
Payment terms are a power game — and you're not winning it yet
Early in a brand's life, supplier payment terms are not a negotiation. Pay upfront, or pay on delivery. You're an unknown buyer. The supplier carries the risk. The terms reflect that.
Over time, as volumes grow and relationships develop, terms may improve. Net 30. Sometimes net 60 if you push. But this improvement is slow, and it never quite keeps pace with the growth in order size.
Meanwhile, the retail buyers you're selling to have no such constraints. Net 60, net 90, occasionally longer — and if you want the account, you agree to their terms.
So here's where a lot of product brands end up: paying suppliers in 30 days, collecting from customers in 90. A structural 60-day gap on every transaction. At £1M revenue, this is uncomfortable. At £5M, the same proportional gap is five times the cash sitting idle. At £10M, you get the idea.
Improving supplier terms is worth pursuing as leverage grows. But it's slow, and it doesn't solve the problem on its own.
Every new channel looks like growth. Your cash flow knows better.
At some point, the natural next move seems obvious. You've got Shopify working. Amazon looks like an easy incremental win. A wholesale inquiry lands from a retailer you've been targeting. Maybe you expand into a new market. Each decision, taken individually, makes sense.
What nobody models is what each of those decisions does to your working capital.
Every new channel brings its own payment terms, its own fulfillment setup, its own lead time requirements. Wholesale means net 60 or net 90 on top of the inventory you've already had to commit to. Amazon means tying up stock in their fulfillment centers weeks before it sells, with settlement cycles that don't match your supplier payment schedule. A new market means a new 3PL, new import duties, potentially a new currency exposure. Each layer adds complexity — and complexity, without exception, costs cash.
The SKU problem compounds this. Founders are optimistic by design. Every new style, every new color version, every line extension feels like upside. And it might be. But each additional SKU requires its own minimum order quantity, its own reorder cycle, its own slot in the warehouse. Brands that grow their range faster than their sell-through data can justify end up with cash sitting on shelves — not metaphorically, literally — in the form of slow-moving stock that ties up working capital for months before it's written down or discounted out.
The brands that scale without repeatedly hitting cash walls tend to have one thing in common: they treat channel and SKU expansion as a working capital decision before they treat it as a growth decision. Not to avoid expanding — but to go in knowing what it will cost in cash terms before the invoice lands.
Growth makes your numbers harder to read at the exact moment you need them most.
Here's a pattern that shows up constantly in fast-growing product businesses. The founder is busy — genuinely, productively busy. Sales are coming in, orders are going out, the team is expanding. The financials are six months out of date because nobody had time to close the books properly, and the last time anyone looked at a cash flow forecast was Q3.
Then something tightens. A supplier payment is late. A reorder needs to go in before the last batch has sold through. A new wholesale account requires upfront inventory commitment. And suddenly the question that should have been answered three months ago — where is our cash, exactly — becomes urgent.
The problem isn't that the cash is gone. More often than not, in a growing product business, the cash exists. It's just stuck. In transit stock that hasn't cleared customs. In invoices that are 45 days outstanding. In a run of a new color version that isn't moving as fast as projected. In supplier prepayments for an order that won't arrive for eight weeks.
But without up-to-date financials — without visibility into the cash conversion cycle in real time — founders can't see any of that. What they can see is the bank balance. And the bank balance, at any given moment in a growing product business, tells you almost nothing useful about the actual financial health of the business.
The result is decisions made on incomplete information. Sometimes that means passing on a growth opportunity because it looks like there's no cash to fund it, when actually there is. More often it means the reverse — pressing ahead with a commitment without realizing the timing will create a gap that can't be bridged.
Growth doesn't just widen the cash gap. It makes the cash gap harder to see. The businesses that manage it well aren't necessarily better funded — they're better informed. Monthly financials, a live cash flow forecast, a clear read on where cash is sitting in the cycle at any given time. Not because it's good financial housekeeping, but because without it, every growth decision is a guess.
The faster you grow, the worse this gets. Yes, really.
The assumption most founders make at some point: once we get big enough, the cash flow problem will sort itself out. More revenue, more cash coming in, more buffer. Well, it doesn't work like that.
As orders grow, the cash tied up in inventory grows with them. As the customer base grows, the total value of outstanding receivables grows too. More retail accounts means more of those 90-day payment cycles running in parallel. The gap doesn't compress with scale — it widens in absolute terms, even if the proportion stays roughly constant.
A business doing £500K with a 60-day cash conversion cycle has a certain amount of cash in the system at any point. The same business doing £5M with the same cycle has ten times as much cash locked up. Growth is expensive. The faster it happens, the more expensive it is.
The data bears this out at a macro level. Net working capital days in the UK have risen 48% since 2015, according to PwC's Working Capital Study 25/26 — and the picture is worse for smaller and mid-size firms, where NWC days have deteriorated by nearly 20% over the same period. Growth is consuming more working capital per pound of revenue than it did a decade ago. The gap isn't closing.
This is why product businesses that scale quickly often feel like they're constantly running to stand still on cash — even when everything is going right. It's not a signal to slow down. It's a signal to plan differently.
Summary
The thread running through all of these is timing. Cash goes out early. Cash comes back late. And as the business grows, the absolute size of that gap grows with it.
None of this means the business is broken. It means it's a product business. These problems are structural — they show up at £1M and they're still there at £20M, just at a different scale.
The next question is how to measure exactly what's happening in your business — which is what the working capital guide covers. And if you're at the point of thinking about how to finance around the gap rather than just survive it, the financing guide is where that conversation starts.
