June 2026 was a markedly different Prime Day.
Many brands were able to boost their sales, seeing large lifts in certain categories with smart strategies and promotional discounts. However, on the flip side, many brands saw softened demand and incremental lift, with momentum fading across the four days instead of building. Not even increases in advertising could boost sales.
Brands that were prepared with a clear promotional strategy, enough inventory, and an established organic rank navigated the sale the best, proving that preparation and efficient spend mattered more than ever.
The Kapoq team compiled all the most meaningful data points from this Prime Day and compared them to what our clients experienced. We pulled data across Kapoq clients, comparing their July 8–11, 2025 Prime Day to June 23–26, 2026 Prime Day. Additionally, we interviewed select clients to understand their individual experience.
Here’s what we found.
Sales Were Softer For Many
Overall, many felt that sales were softer across the board. While Kapoq accounts in aggregate had a better Prime Day this year, reaching 13.6% total sales growth; 49% of accounts evaluated experienced a decline or flat sales compared to the 2025 Prime Day.
This wasn’t a few large accounts dragging the average; it was a wide, shallow decline for many brands that weren’t already growing aggressively YoY on Amazon – evidence of the “event multiplier” being weaker this year (more on that below).
Many others confirmed this, with agencies and brands noting that Prime day felt “softer” this year. The brands that saw lifts came in with strong strategies, with some indicating that the distance from the Fourth of July was great for their sales.
Erik Kraft at EPA Marketing said that this trend was similar across their clients: “Those who came in prepared found success regardless of the timing shift. June reinforced what has always been true: preparation matters more than the calendar.”
One possible reasoning for softer sales is the move from July to June; with the close proximity to Father’s Day, early summer travel, and lack of awareness, customers didn’t shop as strongly as in previous years.
Jonathan Wilner and Amy Rudgard of Market Defense noted that the brands that saw success in this summer Prime Day took an omnichannel approach: “Brands that were well prepared with inventory and leveraged affiliates, social media, influencers, and broader omni-channel marketing to build demand in the months and weeks leading up to Prime Day saw stronger performance overall. Nearly 50% of the brands in our portfolio activated some level of off-Amazon marketing to support Amazon Prime Day.”
Growing Brands Saw More of The Lifts
One thing was clear this Prime Day: the brands that were healthy and growing heading into Prime Day performed the best. The baseline daily run-rate was higher this year than last, proving that brands were set up for success.
However, some still saw fewer sales this Prime Day compared to last. We saw the event multiplier compress; our select accounts saw 2.1x their normal daily sales in 2026 versus 2.4x in 2025.
Our clients echoed this sentiment. Chad Davis at Lucra Commerce reported that “Prime Day felt really soft this year. For brands that did not really participate, we saw much smaller lifts vs regular days than in years past. For brands that did participate, we saw smaller lifts (1.5x,2x) vs previous years (2x-4x+).”
Momentum Faded Across Days
Historically, brands would see their largest number of sales on day 1 of Prime Day, seeing decreases across days 2 and 3, and then a slight increase on the final day.
However, in 2026, we saw a smaller lift on Day 1, with momentum fading across days 2 and 3, with no significant lift on day 4. Day 1 was softer in 2026 overall, with a 6.6% decrease.
Lift vs. baseline |
Day 1 |
Day 2 |
Day 3 |
Day 4 |
Prime Day 2025 |
2.98x |
2.14x |
2.03x |
2.40x |
Prime Day 2026 |
2.71x |
2.04x |
1.76x |
1.96x |
Many of our clients (both agencies and brands) saw similar patterns, noting that day 1 sales were decent, days 2 and 3 were weak, and day 4 was not as strong as 2025.
Fewer Discounts and Splurge Purchases
In 2026, data shows brands weren’t discounting their way to higher sales volume.
Additionally, many of our agencies noted that consumables and health and household sold better overall, while splurges and lifestyle purchases were much less than previous Prime Days.
Jeremy Dodge at The Horse Consulting noted that “This is a trend that keeps shifting more towards consumables each year. Shoppers are learning to ‘pantry up’ on the products they plan to buy anyways over the next 3 months (think coffee, home and personal care, nutrition, pet food, etc.), rather than splurge on a new appliance.”
Another Kapoq customer echoed this same experience: “Seems like the event is becoming a sucker for consumer and household [goods]. We saw performance pop in these categories.”
Advertising Cost More but Worked Best
While organic sales performance was a mixed bag, ad spend jumped up by 11% across the board. Brands that spent more on advertising saw their efficiency drop due to higher CPC’s, up 17% compared to Prime Day 2025. Ad-attributed sales actually dropped by -3.1%, driving ACOS up 14.5% on average.
Despite increases in the ad costs, total sales trended in the right direction, pushing TACOS down -2.3% YoY. This proves that while clicks were more expensive on average, organic sales made up the difference for many brands.
Erik Kraft at EPA Marketing said that “Brands pairing ad spend with a promotional offer navigated it more effectively. Pairing spend with promotions was a strategy we prioritized across our portfolio this Prime Day.” This combination proved most effective for brands across the board.
Timing of Future Prime Days
In 2026, Amazon moved Prime Day from its usual July to June. There were a lot of speculated reasons for this, but the reasoning doesn’t matter so much as the impact it had on sales this year. The move to June coincided more closely with Father’s Day, impacting some brands’ sales.
The natural assumption is, then, that the fall Prime Day would move from October to September, shifting it into Q3 and leaving Cyber Weekend and holiday spending in Q4.
Alexi Bell of AO2 Marketing agrees: “With Prime Day now landing at the end of Q2, we could see the fall event shift from October into late September, creating a tentpole event in every quarter (March Spring Sale in Q1, June Prime Day in Q2, September Fall Prime Event in Q3, and Black Friday/Cyber Monday in Q4).”
While there’s no official word from Amazon on upcoming changes to future Prime Days, it can’t hurt to anticipate either scenario as a possibility when planning the rest of your year!
Wrapping It Up
This summer Prime Day was markedly different from past ones, taking place in a different month in an economic climate where spending is down overall. The brands that saw success took a holistic view of their brand, with inventory, advertising, and content all playing key roles in success.
We recommend checking out our Prime Day Event Recap Skill in K-Stack on Github. This skill compares your year-over-year performance around event days and goes well beyond the headline number, so you can see more than just “sales increased 14%.” You’ll be able to see why your Prime Day shook out the way it did, so you can make meaningful changes for next year.
If you’re looking to get a bigger picture of your business and see the forest for the trees, especially on tentpole days like Prime Day, sign up for a free demo of Kapoq. We help you manage every area of your business and see how each area affects your overall brand health.
