Black Friday is the one weekend where every inventory mistake you have been getting away with all year shows up at once, with an audience. Under-order and you watch your bestseller sell out at 9am on the biggest traffic day of your life. Over-order and you spend January staring at pallets of stock you bought at peak prices and now have to discount to clear. The margin between those two outcomes is planning, and the window to do it is basically now.
I have run BFCM both ways, panicked and prepared. Prepared is better in every way, and it is not even that much work if you start early enough. Here is how I think about it.
Forecast the surge, do not just scale up last month
The first mistake is treating BFCM like a normal month with the volume dialed up a notch. It is not. The shape is completely different: a huge spike over a few days, concentrated on a handful of products, often at a discount that changes which products people buy.
So build your forecast from the right data:
- Look at last year's BFCM specifically, not your recent average. If you have the history, that weekend is your best predictor. Pull units sold per product across the actual promo period.
- Apply your growth rate. If the store is up 40 percent year over year, scale last year's BFCM numbers by something like that, then sanity check against your current velocity.
- Account for the discount effect. A product at 30 percent off sells faster than its normal velocity. Your deepest-discounted items will move far more than their everyday pace suggests, so forecast them higher.
- If you are new, borrow a shape. No BFCM history? Take your current bestsellers and assume the weekend does several times their normal daily volume. An imperfect estimate beats flying blind.
The output you want is a per-product target: roughly how many units of each hero product you expect to move across the promo window. That target drives everything else.
Order early, because lead time does not care about your calendar
This is the part that trips people up every single year. You can forecast perfectly and still be empty on the day if you ordered too late for stock to arrive. Lead time is unforgiving, and it gets worse in Q4 when every other store is also hammering the same suppliers and freight lanes are jammed.
Work backwards from the lead time, not forwards from your to-do list. If your supplier takes six weeks and shipping adds two, that stock needed to be ordered eight-plus weeks before the weekend. If you are reading this in early November and your lead times are long, the honest answer is that your big overseas reorders should already be placed, and anything left to do is with suppliers who can turn around fast or stock you already have inbound.
A few lead-time habits that pay off:
- Use real observed lead times, not the quote. What did your last few orders actually take, door to door?
- Add extra buffer for the season. Q4 slippage is the norm, not the exception. The week it slips is the week you cannot afford it.
- Confirm your inbound. Know the actual arrival dates of orders already in transit, and build your plan around when stock is sellable, not when it was shipped.
Protect your bestsellers above all else
Not every product deserves equal attention. A small number of items will drive the overwhelming majority of your BFCM revenue, and those are the ones you cannot be out of. Running dry on a hero product during peak is the single most expensive thing that can happen, because that is when demand and traffic are at their absolute highest.
So prioritize ruthlessly:
- Rank products by expected BFCM revenue and defend the top of that list first. Thick buffers, early orders, and your closest supplier attention go here.
- Protect against overselling, not just stockouts. The last thing you want on Black Friday is to oversell your hero SKU across channels and start canceling orders. Make sure every sales channel reads one accurate, live inventory number so the last unit sells exactly once.
- Have a plan for the near-misses. If a bestseller is running low mid-weekend, know in advance whether you can route from another location, pause its ad spend, or swap in a backup product rather than scrambling live.
Managing this across a full catalog in the heat of the weekend is where native tooling runs out of road, and with Stocky retired a lot of us have had to find something sturdier. I keep the whole picture in Stockra: expected demand, reorder points, and live stock by location in one place, so I can see at a glance which heroes are at risk and act before they hit zero instead of finding out from an angry customer.
Plan the back end too, so you are not stuck with dead stock
Here is the trap on the other side. Terrified of stockouts, you over-order everything, and then BFCM ends and you are sitting on a mountain of inventory you paid full price for and now have to liquidate at a loss. Being in stock is the goal. Being buried in post-holiday deadstock is its own kind of failure.
The way to thread that needle:
- Over-order your proven heroes, be conservative on the unproven. Depth on the sure things, caution on the maybes.
- Favor products you can sell year round. Stock you do not clear by December 1 is not a disaster if it keeps selling into spring. A holiday-specific item is a different risk.
- Know your clearance plan before you buy. If you are intentionally over-ordering something risky, decide in advance how you will move the leftovers, so excess is a choice and not an accident.
- Keep watching velocity through the weekend. Real-time sell-through tells you what is working while there is still time to reorder a fast mover or pull back promotion on a dud.
Your short pre-BFCM checklist
If you do nothing else, do these:
- Forecast per-product demand from last year's BFCM plus your growth and discount depth.
- Place long-lead-time orders now, or confirm they already landed, working backwards from real lead times.
- Rank products by expected revenue and protect the top of the list with buffer stock.
- Lock down inventory sync so you cannot oversell your heroes across channels.
- Be deliberate about over-ordering, favoring year-round products, with a clearance plan for the rest.
Black Friday rewards the prepared and punishes the improvised. The stores that sail through it are not luckier. They did the arithmetic in October, placed the orders on time, and spent the actual weekend watching it work instead of putting out fires. Start now and you can be one of them.
