Prime Big Deal Days 2026 was Amazon's best fall sale yet - what the data means for brands
Amazon's October 6-7 Prime Big Deal Days wrapped as the retailer's strongest October event on record, and the second most successful sale of any kind behind the summer 2023 Prime Day, according to Numerator's shopper-panel tracking and reporting from Retail Dive. Amazon says hundreds of millions of items moved across the two days, with members saving more than $1 billion. For brands running the next six weeks into Black Friday and Cyber Monday, the numbers underneath the headline matter more than the record itself.
The headline numbers
Per Numerator's real-time panel of verified Prime Big Deal Days shoppers, the average order size was $51.03, up from $48.36 during July's Prime Day. Average spend per household landed at $86.98, just under Prime Day's $89.04, with 39% of shoppers placing two or more separate orders. Average spend per item was $24.22, and two-thirds of items purchased sold for under $20 - this was a volume event, not a big-ticket one.
- Average order size: $51.03, up from $48.36 at Prime Day.
- Average household spend: $86.98 across the two days.
- Price distribution: 66% of items sold under $20; only 3% topped $100.
- Top sellers: Premier Protein shakes, Scott ComfortPlus toilet paper, Lysol wipes, Dawn Powerwash, and Sol de Janeiro body spray led unit volume, while apparel, beauty, home and toys were the strongest categories overall.
Shoppers were comparing you to Walmart in real time
The detail most worth a brand's attention did not come from Amazon at all: 55% of Prime Big Deal Days shoppers said they compared prices elsewhere during the event, and among them 66% checked Walmart, 39% checked Target, and 27% checked a club store. For any brand selling on both Amazon and Walmart Marketplace, that is not a hypothetical cross-shopping stat - it is a description of the exact browser tabs your customer had open on October 6 and 7.
If your Walmart listing had a stale price, a different pack size, or weaker in-stock status than your Amazon listing during the event, a meaningful share of comparison shoppers saw that gap directly and some portion bought elsewhere on it.
What this means for brands
Three things worth acting on before Black Friday and Cyber Monday, six weeks out:
- Treat Amazon and Walmart pricing as one decision, not two. With well over half of shoppers price-checking elsewhere mid-event, a promotion that only lands on one channel creates a visible gap your competitors do not have to create - your own other listing does it for them.
- Protect in-stock on the consumables that actually moved. The best sellers this event were replenishment staples, not splashy new releases. If your catalog has a low-price, high-frequency SKU, that is the one that cannot go out of stock in the next six weeks.
- Plan BFCM promotions around volume, not markdown depth. With two-thirds of items selling under $20 and average order size rising, a wider assortment of smaller, dependable offers likely outperforms a narrow set of deep discounts on a few SKUs.
None of this changes the BFCM playbook completely. It confirms the part of it that is easiest to skip under deadline pressure: keeping price, pack size, and stock status aligned across every channel a comparison shopper might open at the same time they open yours.
