Black Friday falls on November 27, 2026, and Cyber Monday on November 30. For a brand selling on one channel, that's a busy week. For a brand selling on Amazon, eBay, Walmart, TikTok Shop and Shopify at the same time, it's five busy weeks squeezed into one, with five sets of rules, deadlines and customers.
Most Black Friday problems I see aren't about demand. They're about the business not keeping up with it: stock that runs out on one channel while it's still listed on another, ads that keep spending on products that sold out at lunchtime, or messages that go unanswered for two days. Here's the checklist I use to prevent that.
The dates that matter this year
If you sell through Amazon FBA in the US, these come straight from Amazon's holiday announcement for 2026:
- October 20: last day to submit Black Friday Week and Cyber Monday deals.
- October 21: inventory must arrive at Amazon for FBA shipments with minimal shipment splits.
- October 28: inventory must arrive for FBA shipments with Amazon-optimised splits.
- October 15 to January 14, 2027: holiday peak fulfilment fees apply, on average about $0.32 more per unit, plus a 3.5% fuel and logistics surcharge on top.
- Deal fees: $100 upfront per promotion, plus 1.5% of promotional sales, capped at $5,000.
Other channels and other countries have their own cut-offs, so check each one in its seller portal. Amazon UK, Walmart, TikTok Shop and your Shopify carriers will all have different dates.
1. Get stock right before anything else
Overselling is the most expensive Black Friday mistake. One cancelled order costs more than a lost sale, because cancellations count against your account health. If you sell the same product in several places, make sure every channel takes its stock numbers from one source of truth, that your SKUs match everywhere, and that syncing runs every few minutes, not once an hour.
For your fastest sellers, hold back a small buffer on each marketplace. You might miss a handful of sales. You'll avoid a lot of cancellations. I explain the full setup in Selling one product on Amazon, eBay and Shopify without overselling.
2. Check prices and margins on every channel
Peak fees, deal fees and discounts all land at the same time, so work out your real margin per product before you set a single deal.
- Recalculate profit per unit after peak fees, surcharges and the deal discount.
- Keep your offers consistent across channels. Amazon can stop showing your offer as the featured one if it finds the same product much cheaper elsewhere.
- Decide in advance which products are worth discounting and which aren't. Not every bestseller needs a deal to sell in November.
3. Plan ad budgets, then watch them daily
Clicks get more expensive in Black Friday week, and shoppers buy faster. Raise budgets on your proven products so campaigns don't run out of money by midday, and add negative keywords from last year's search terms to cut waste.
Most importantly, connect ads to stock. Pause or lower bids on products that are about to sell out, on Amazon, Google, Meta and TikTok alike. Paying for clicks on a product nobody can buy is the quietest way to lose money in Q4.
4. Get listings and your store ready
- Refresh main images and titles on your top 20 products. Mention gift-relevant details (sizes, gift boxes, delivery times) in titles and bullet points where they help.
- Update your returns and delivery information on every channel, including holiday return windows if you offer them.
- On Shopify or WooCommerce, test checkout, discount codes and site speed now. Then freeze big changes from mid-November: no new themes, apps or redesigns until December.
5. Line up fulfilment and carriers
Check carrier cut-off dates for the US and UK, order packaging and labels early, and set realistic handling times on each marketplace. If a channel promises faster delivery than you can manage, change the setting now, not after the late-delivery warnings arrive.
6. Prepare customer service for the rush
Amazon expects replies to buyer messages within 24 hours, and the other channels watch response times too. Write templates for the questions you'll get most (where's my order, can I change my size, gift wrapping, returns), and agree who checks messages on each channel every day, including weekends.
“Black Friday rewards the brands that prepared in October, not the ones that worked hardest in November.”
7. Run a simple "war room" for the week
From Thursday to Monday, someone should check these at least twice a day:
- Stock levels on every channel, and anything close to selling out
- Ad spend against sales, by channel
- Account health, late shipments and cancellations
- New reviews and unanswered messages
It doesn't need software. A shared sheet and a clear owner for each check is enough.
Your Black Friday & Cyber Monday checklist
0 / 8 DONEAfter Cyber Monday
The week after is when returns, late reviews and restocking hit. Plan for a returns spike, restock the products that sold out, and write down what worked while it's fresh. That page of notes will be the most useful thing you have next October.
The short version
Lock in stock, margins and deadlines in October. Make ads follow your stock. Freeze big store changes by mid-November. And give every channel a clear owner for the week itself.
If you'd rather not juggle all of that across several marketplaces, this is exactly what I handle for the brands I work with. Book a free call and I'll look at your setup before the rush.
Sources: Amazon Seller Central: Holiday 2026 fees, eligibility and deadlines. Deadlines and fees can change, so always confirm the latest figures in your own seller accounts.
