Black Friday to Christmas is where the year is won or lost — and where small gaps in preparation turn into very large problems. The brands that sail through peak aren't lucky; they did the boring work in good time. Here's the checklist.

Forecast early, forecast generously

Start with last year's numbers, layer on your growth, and add a margin for the lines that could go viral. Break it down to SKU level — a peak-season stockout on your hero product costs far more than carrying a little extra.

Share the forecast with your fulfilment partner well ahead of time. Capacity, labour and space all get planned around it, and a number they see in October is far more useful than a surprise on the 28th of November.

Lock your stock-in dates

The single most common peak failure is stock arriving too late to sell. Work backwards from your promotions: when does inventory need to be received, checked and put away to be live for launch?

Build in slack for supplier delays and slower inbound processing when warehouses are busy. Agree firm stock-in windows with your 3PL — and get big deliveries booked in rather than turning up unannounced during the busiest weeks of the year.

Nobody ever regretted forecasting too early. Plenty have regretted forecasting too late.

Confirm carrier capacity

Couriers hit their limits at peak, and that's precisely when a single-carrier setup bites. Make sure your fulfilment partner spreads volume across multiple carriers so no one network's capacity becomes your ceiling.

Know the realistic last-dispatch dates for guaranteed pre-Christmas delivery on each service, and publish them clearly on site. Customers forgive an honest "order by this date" far more readily than a silent miss.

Get your comms ready before you need them

  • Publish Christmas cut-off dates prominently — on product pages, at checkout and in email.
  • Pre-write the awkward emails — delays, stockouts, "your order is on its way" — so you're not drafting them at 9pm under pressure.
  • Brief customer service on what's promised, what's selling and what to do when something slips.
  • Make tracking visible so shoppers can self-serve "where is my order?" instead of queuing in your inbox.

Pressure-test the whole chain

A week before the rush, walk the full path: order in, picked, packed, labelled, shipped, tracked. Look for the bottleneck that only appears under volume — the integration that lags, the packaging you'll run short of, the SKU that's hard to pick. Fixing it in a calm week is trivial; fixing it on Black Friday is not.

The one-line test

If your busiest day this peak arrived tomorrow, what would break first? Whatever you just thought of — that's your number-one job between now and November.

Peak rewards preparation, not heroics. Do the unglamorous work early and the busiest weeks of your year can be the calmest part of your operation.