Shopify Black Friday Inventory Planning:
Start Now.
It's Already June.

Black Friday 2025 generated over $11.5 billion in Shopify sales in four days. A significant chunk of that was left on the table by merchants who ran out of stock — not because their products weren't good, but because they ordered too late.

The math is simple. International suppliers need 60 to 90 days. Domestic suppliers need 30 to 45. You want stock physically in your hands by October 15 so you have time to prep listings, test bundles, and handle shipping buffers. That means purchase orders go out in July at the absolute latest. And to place accurate orders in July, you need to do your analysis now — in June.

This is that guide. No vague advice. Step by step, with formulas.

Why June Is Already the Deadline

Most Shopify merchants start thinking about Black Friday in September or October. By then, two things have already happened: their competitors locked in supplier capacity, and their best-selling products are sitting at minimum stock levels with no buffer.

Here's the timeline that actually matters:

Step 1: Audit Last Year's BFCM Numbers

Before you order anything, you need to know what actually sold last year. Not what you think sold — what the data says.

Pull these numbers for November 15 to December 1, 2025:

• Units sold per product (not revenue — units)
• Daily sales velocity during the peak window (Nov 28–Dec 1)
• Stockout dates — which products hit zero and when
• Your normal daily sales for the same products in October

From these four numbers you calculate your BFCM multiplier per product.

This multiplier is the most important number in your BFCM planning. Everything else flows from it.

If a product sold out before December 1 last year, its real multiplier was higher than what you captured. Add 20% to the calculated multiplier for those SKUs — the demand was there, you just didn't have the stock.

If this is your first BFCM, use benchmarks: fashion and accessories typically see a 4× to 6× spike. Home goods run 3× to 4×. Electronics and tech accessories can hit 8× or higher. Start conservative on year one and focus your capital on your top 10 products.

Step 2: Calculate Exactly How Much to Order

You have your BFCM multiplier. Here's how to turn that into an order quantity.

Run this formula for every product in your top 20%. Your top 20% of SKUs typically drives 80% of BFCM revenue. Don't waste cash flow over-ordering slow movers when your best sellers might run dry.

A few adjustments to make before you finalize quantities:

• New products launching at BFCM: Use industry benchmarks. Order 50% of what your gut says — and plan a domestic top-up order for late October if pre-launch signals look strong.
• Products that sold out last year: Add the 20% buffer to the multiplier, not just the final quantity.
• Bundles: Calculate component inventory separately. A bundle containing Product A and Product B is limited by whichever component runs out first. Plan each component at bundle demand × bundle proportion.
• Perishable or expiring products: Be precise. No safety buffer you can't sell through in January.

When you're done, you should have a document with every top SKU, its expected BFCM daily sales, its 30-day order quantity, and its safety stock number. This becomes the basis for your purchase orders.

Step 3: Build Your Purchase Order Timeline

You have quantities. Now work backwards from November 28, 2026 to figure out when each PO needs to go out.

Key dates:

• November 28, 2026: Black Friday. Stock must already be at your location.
• October 15: Target date for all BFCM inventory to be on hand.
• October 1: Last acceptable domestic arrival date (absorbs delays).
• September 15: Last acceptable international arrival date.

Build a simple calendar with these deadlines per supplier. For most merchants, July is the critical month. Miss July for international suppliers and you're either paying air freight (3× to 5× the cost of sea) or running out of stock.

In EZStock, you create a purchase order per supplier, add the products and quantities, set the expected delivery date, and send it as a PDF directly from the app. When the order arrives, you mark it received and inventory updates automatically across your Shopify store.

Step 4: Set Peak-Season Reorder Points

Your BFCM order gets inventory on shelves. But stock starts depleting in October before the sale even starts — from early shoppers, promotional campaigns, and social traffic you're running to build up the sale.

You need peak-season reorder points so the system flags when stock drops to a level that needs a top-up order — before you actually run out.

Set these in October — not in November. By the time Black Friday arrives, you want to be watching a green dashboard, not scrambling to place emergency orders with 3-day air freight.

In EZStock, reorder points are set per product or per product-supplier combination. When stock drops to the reorder point, the product gets flagged on your dashboard. One click creates a draft purchase order. Review, adjust if needed, and send. The whole cycle runs inside Shopify without touching a spreadsheet.

Step 5: Lock In Your Suppliers Now

The biggest mistake merchants make isn't the math. It's assuming their supplier has unlimited Q4 capacity.

Your suppliers are getting BFCM orders from every store they work with. The merchants who reach out in June get confirmed capacity and normal pricing. The ones who reach out in September get "we'll try our best" and Q4 surcharges.

Do this right now — before you finalize quantities:

• Email every primary supplier. Let them know you're planning a larger-than-normal order for BFCM. Give a rough quantity estimate and ask for capacity confirmation and lead time for July–August delivery.
• Lock in pricing in writing. Q4 price increases are common — especially packaging and raw materials. Confirm your pricing now if your supplier allows forward contracts.
• Identify a backup per category. Not every product, but your top 3. If Supplier A can't fill the order, you need someone who can. Qualify that backup now, not in October.
• Confirm payment terms. Some suppliers require a deposit for large BFCM orders. Know your cash flow and negotiate terms before the order is placed.

The Mistakes That Kill BFCM Revenue

The merchants who lose BFCM aren't the ones with bad products. They're the ones with predictable, avoidable operational failures. Here's the list:

The merchants who win BFCM aren't the ones with the biggest marketing budget. They're the ones with stock on hand when everyone else runs out. You have six months. Use them.