£46m M&Co collapse exposes supply-chain nightmare

When a household-name business collapses, the headlines count the stores and jobs lost. But behind the wreckage can be hundreds of small suppliers facing unpaid invoices, stranded stock and cancelled orders. M&Co’s collapse reportedly left a £46 million debt trail, with more than £33 million owed to 600 unsecured creditors. For a micro-business, losing even one major invoice can be enough to trigger its own collapse. That is how one big corporate failure can spread through the supply chain, taking perfectly viable small businesses down with it.

WHEN A BIG BUSINESS GOES BUST SMALL SUPPLIERS FOLD

Cash flow chaos, unpaid invoices, stock losses, and contracts that vanish overnight. What happens in the supply chain when a major customer collapses is gruesome.

The Herald in Scotland reported at the beginning of this week that new documents show that the big high street retailer, M&Co, which collapsed into administration in 2022 for the second time with the loss of 1800 jobs, left a debt trail amounting to £46million.

When a big business goes under, whether it’s a retailer, construction firm like ISG in 2024 or Carillion in 2018, a manufacturer or distributor, the headlines focus on the brand. The real damage however lands on small and micro suppliers, which often lose everything in the fallout. In M&Co’s case 600 unsecured creditors lost out on £33 million.

Your unpaid invoices become “unsecured debt” and you’re at the back of the queue

When a company enters administration or liquidation:

• Banks get paid first

• HMRC gets paid next

• Secured creditors follow

• Employees get protected

• Small suppliers are last in the queue for the leftovers.

Last usually means you get pennies or nothing. You can’t chase the debt, sue or demand payment and it wouldn’t be worth your while anyway because any money that once was, has gone. In the M&Co case some creditors got 2.32 pence for every pound they were owed in March 2026. Beyond that payout, creditors will get nothing according to the new documents, meaning the vast majority of the £33million-plus owed to them has been permanently lost.

For many micro‑businesses, one unpaid invoice can wipe out a month’s profit and for others it’s fatal.

Another blow is that often suppliers in these cases find their stock is trapped or lost entirely. If you’ve supplied goods on sale‑or‑return, delayed payment terms or extended credit, it may be locked in a warehouse, sold by administrators, used to pay other creditors and impossible to recover. That means you’ve lost out twice.

Even if the goods legally belong to you, administrators may take weeks or months to release them, if they release them at all.

Your cash flow collapses overnight when a big customer shuts up shop. Small businesses rely on predictable payments. When a big customer collapses any payments you’d been expecting disappear, and on top of the stock being lost your next order is cancelled, your cash flow forecast is wrecked and your ability to pay staff, rent, suppliers is immediately in danger.

Many micro‑businesses operate on thin margins and tight cash cycles. A single missed payment can trigger all sorts of financial distress. Bigger firms with deeper pockets may be able to borrow to see them over the crisis but that’s often not an option for smaller businesses. This is why supply‑chain failures often cause secondary collapses.

Your future orders vanish even if the business is “saved” because if the company is bought out of administration the new owners often renegotiate contracts and previous agreements are void. The new contract terms may mean payment terms are worse, prices are squeezed and suppliers are replaced. A “rescue” by a new owner rarely rescues the other businesses in the supply chain.

You still owe your suppliers even though you haven’t been paid and this is the last straw for many small businesses affected. If you bought materials or stock to fulfil the big customer’s order you still owe your suppliers, VAT and any corporation tax on earlier profits. The collapse of your customer doesn’t cancel your obligation to pay your bills.

Your people may have to go and this is the worst part for many small business owners. If the big customer was your main client, biggest buyer or seasonal lifeline they will be your main revenue stream. You then face the awful situation where you may have to reduce hours, cut shifts, freeze hiring or even make people redundant. Quite apart from the distress this causes other people, it makes it even harder to rebuild with new clients. This is how big‑business failures ripple through communities as well as businesses.

Your business may be forced to close even though you didn’t cause the problems. Many micro‑businesses collapse because they lose a major customer, stock, cash flow, future orders and the confidence from lenders. The failure of one big business can take dozens and even hundreds, as in the case of Carillion, of small businesses down with it.

Protecting yourself If possible

Reduce reliance on one big customer: no customer should be more than 25–30% of your revenue.

Tighten credit terms with shorter payment windows, deposits and part‑payment upfront.

Use credit insurance (if affordable). It’s expensive but cheaper than losing everything.

Check your retention‑of‑title clauses and make sure your contract says your stock remains yours until paid.

Watch for early warning signs. If payments start being delayed and there’s silence from the company or you hear of people leaving or being let go, you can be fairly sure there are problems brewing.

Build a cash buffer, even if it is small, so that you have a chance of saving your own business.

Talk to your accountant as soon as you see any signs of a big customer wobbling. You need advice before they collapse.

Chain reaction

When a big business goes bust small suppliers lose money, stock gets trapped, cash flow collapses, future orders vanish, staff are affected and often micro‑businesses don’t survive.

The collapse of one big business can create a chain reaction that hits dozens of small firms. Protection isn’t perfect but awareness and early action can stop a bad situation becoming fatal.