A framework for scaling ecommerce operations from £1m to £20m

Ecommerce founders we work with often share the same frustration. "We grew to £4m on the systems we had at £1m. They started breaking somewhere around £3m, and now nothing works the same." That experience is not coincidence. The operational stack of an ecommerce business has at least three discrete redesign points on the way to £20m, and the failure to plan them is the single most common reason brands stall.

The three operational walls

Most product-led ecommerce businesses go through a roughly predictable evolution. Below £1m the operation is essentially the founder plus a virtual assistant. Between £1m and £3m, basic systems get bolted on, Shopify, a 3PL, an email platform, an inventory spreadsheet. Between £3m and £8m, marketing scales faster than operations can, and channels start multiplying. Between £8m and £20m, the operation needs to become a function rather than a constellation of plugged-in tools.

Each transition has a different cause and a different fix. Understanding which transition you are approaching matters more than any individual system decision.

The first rebuild: £1m to £3m

The signature problem at this stage is that the operational systems that got the brand to £1m start failing at £2m. They were designed for a smaller volume, less SKU complexity and a simpler channel mix.

The most common symptoms are: fulfilment errors climbing as 3PL pick volume grows, the inventory spreadsheet that worked at 200 SKUs falling over at 600, customer service contact volume outpacing the team's capacity, and the founder still personally approving every supplier PO.

The right response at this stage is rarely an ERP. ERPs are sold aggressively to brands at this revenue level but the implementation cost, both money and disruption, usually exceeds the benefit. The right response is usually three things in sequence: a proper inventory and replenishment tool (Cin7, Linnworks, Khaos, ShipStation depending on category), a customer service platform with proper tagging and reporting (Gorgias or Zendesk), and a documented operational decision-making process so the founder is not the bottleneck on every supplier or fulfilment choice.

The founder needs to make one hire here that they often defer too long: a Head of Operations at around £55 to 70k, even on a part-time basis to begin with. Without that single hire the founder typically remains the bottleneck right through the second rebuild.

The second rebuild: £3m to £8m

The signature problem at this stage is channel multiplication. The brand that was DTC-only at £2m is now selling on Amazon UK, considering eBay, has a small wholesale book, and is contemplating Pan-EU. Each channel grew its own systems and there is no operational spine connecting them.

The classic symptoms: inventory numbers that differ between Shopify, Amazon Seller Central and the wholesale system; promotions on one channel cannibalising another; margin per channel that nobody can calculate cleanly; a customer service team that handles Shopify orders well and Amazon messages badly.

The right response at this stage is to consciously design the operational architecture, not to keep bolting on more tools. The three foundational decisions: which system is the source of truth for inventory and orders (usually an inventory/OMS layer like Cin7 or Linnworks, not Shopify itself); which fulfilment model serves which channel (FBA is structurally separate from DTC fulfilment, and that is fine, but it needs explicit choice); and what the channel pricing and promotional rules are (otherwise channels compete with themselves).

The right hire at this stage is typically a Head of Ecommerce or a senior operations lead with multi-channel experience. The total cost of getting this hire wrong is one of the largest avoidable errors at the £3m to £8m stage and is the single most common reason a Fractional COO gets brought in.

The third rebuild: £8m to £20m

The signature problem at this stage is that the business is still being run as a founder-led project even though it is now a company. The systems work, the channels work, the team has scaled, but the founder is still the operational decision-maker on too many things, and the business cannot scale past their personal bandwidth.

The symptoms here are more cultural than mechanical. Senior team members who were excellent operators at £5m are out of their depth at £12m. Hiring processes are still ad-hoc. The reporting cadence is still monthly when it should be weekly. The founder is travelling more, in meetings more, and still being escalated every supplier decision.

The right response is institutional, not technical. The business needs a proper operating rhythm (weekly leadership team meeting, monthly operating review, quarterly strategy review), a proper budgeting cycle, defined senior accountabilities (head of supply chain, head of ecommerce, head of customer, head of people), and a deliberate decision about where the founder spends their time. Most brands at this stage also need their first proper finance leader, a Financial Controller or Fractional CFO at minimum.

At this scale the supply chain function typically needs a dedicated leader for the first time, and the question of in-house warehouse versus 3PL needs revisiting. Many brands also start international expansion in earnest here, often beginning with EU markets via Pan-EU FBA or a continental 3PL.

The signals you are approaching the next wall

Across all three transitions, the warning signs are similar. Marketing is hitting its numbers but operations is not keeping up. Fulfilment cost per order is climbing. Returns rate is climbing. Customer service backlog is widening. The founder is in firefighting mode more weeks than not. Senior team meetings are about problems not opportunities.

The mistake most founders make is to interpret these signs as a marketing problem (we need more growth to fix this) or a hiring problem (we need to fill seats) when they are actually a structural problem (the operating model that worked at the previous stage does not work at this stage). The fix is to consciously redesign rather than incrementally add.

Common mistakes at each transition

At the first transition, the most common mistake is over-investing in an ERP before it is needed. Brands at £2m often buy NetSuite because a consultant told them to, then spend 18 months implementing it and another 12 months recovering. A proper inventory and OMS tool at £20 to 40k of annual cost will serve a £3m brand better than an ERP at £80k.

At the second transition, the most common mistake is hiring a generalist where a multi-channel specialist is needed, or vice versa. The Head of Ecommerce hire that works at £4m is different from the one that works at £12m. The same person rarely takes you across both transitions.

At the third transition, the most common mistake is the founder not actually letting go. The leadership team gets hired but the founder continues to make operational decisions, undermining the structure they have built. This usually requires a deliberate, sometimes uncomfortable conversation before the business can scale further.

Common questions