The classic e-commerce failure pattern: profitable on the P&L, growing on revenue, dead on cash. Inventory orders ahead of Q4 demand consume £200k of cash; the corresponding revenue lands three to five months later, after Amazon settlements, Shopify holds, and refund cycles. A brand growing 60% year on year can run out of cash even while reporting healthy gross margins. Treasury, not P&L, is the operational reality.
This pillar covers the major cash-flow, treasury, and alternative financing levers for UK e-commerce brands. Each section links to a detailed companion piece.
Q4 cash flow is the year-defining event
For most UK consumer e-commerce, October to December is 35 to 55% of annual revenue. The inventory order to support it goes out in July or August: cash out, no offsetting revenue. Black Friday and Christmas sales settle from late November through January, with refund spikes through February. Brands that have not modelled this rolling 13-week cycle by July routinely run out of cash in September, when the supplier deposit is due.
The 13-week rolling forecast
- 1Week 1: pull bank balance, open AR, open AP, committed inventory POs, pending settlements.
- 2Week 2 to 13: roll forward each week with expected sales, payout timing, fee deductions, payroll, VAT, and supplier payments.
- 3Refresh weekly with actuals; the forecast is the operational document, not a year-end exercise.
- 4Add a "stress" scenario: settlement reserve doubles, supplier requires 100% deposit, returns rate spikes.
- 5Surface decisions: skip a marketing push, delay a launch, draw on a credit facility, raise.
Platform financing
Shopify Capital, Amazon Lending, and Stripe Capital all offer marketplace-data-underwritten financing without a personal guarantee. Cost is typically 8% to 18% effective (built into a fixed "factor rate" rather than a stated APR), repaid as a percentage of daily sales until cleared. Accounting treatment: the financing is a liability, not revenue. The factor amount is interest expense, recognised over the term. Easy to misclassify; brands routinely report the cash inflow as revenue and over-state both turnover and growth.
MER as the diagnostic
Marketing Efficiency Ratio (MER) is total revenue divided by total marketing spend across all channels. Unlike ROAS, which is per-channel and attribution-sensitive, MER measures whether marketing as a whole is profitable. Healthy DTC brands target MER above 3.5 to 5x depending on category and gross margin. MER trending below 2x for two consecutive months is a structural warning, irrespective of what platform-attributed ROAS reports.
FX exposure compounds
A UK brand sourcing in USD from China and selling in GBP carries unhedged FX exposure on every supplier payment. A 5% GBP/USD move on a £500k annual inventory spend is £25k of unbudgeted cost, more than enough to wipe out the year's net margin for a thin-margin category. Forward contracts and FX-hedged supplier accounts (Wise, Airwallex, Currencycloud) reduce the exposure; for serious operators, a treasury policy is a board-level document.
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