Amazon Prime Day strategy: why it demands a year-round approach

Prime Day used to be straightforward. Two days in July, a spike in traffic, a handful of deals, and then back to normal. Plan a few weeks out, submit what you had, and see what happened.

That version of Prime Day no longer exists. In 2025, the event extended to four days for the first time. Over 80% of Prime members surveyed planned to shop it, with two-thirds looking for discounts of at least 30%. Amazon's biggest summer event now demands a fundamentally different approach, one that starts in the spring and connects directly to the rest of the peak season calendar.

Prime Day has matured: what that means for brands

Prime Day shoppers are more sophisticated than they were five years ago. Many set deal alerts weeks in advance. Some deliberately hold off purchases in June to see what the event brings. In high-ticket discretionary categories, there is meaningful demand that has been suppressed ahead of Prime Day, ready to release if the deal is right.

That creates real opportunity. But it also means the window for capturing it is compressed. 60% of Prime Day purchases typically occur on Day 1. The brands that capture the most of that first-day concentration are the ones that have been preparing since spring.

In the UK, Prime Day 2025 online sales hit £2.08 billion across the four-day event, an 11.1% year on year increase according to Adobe Digital Insights. The first day alone accounted for £676.5 million in UK online spend.

Why inventory planning cannot wait until June

The most time-sensitive element of Amazon Prime Day preparation is inventory. Amazon's fulfilment centre intake windows close well before the event, and building accurate demand forecasts for every deal ASIN takes time, particularly for brands with European marketplace presence spanning multiple countries.

The most disciplined Amazon Prime Day strategies begin inventory planning in the spring. Product level forecasts are built for every deal ASIN, intake management is planned months in advance, and stock is confirmed in fulfilment centres with enough lead time to correct for forecasting errors.

Research consistently shows that 75% of shoppers will switch to a competitor after just two stockout incidents. During a four-day event where 60% of purchases concentrate on Day 1, recovering from an early stockout is extremely difficult.

Strong in-stock rates throughout a peak event are the direct result of preparation that starts months earlier. That is what spring preparation looks like in practice.

Deal submissions and Amazon relationships

Getting a deal placement on Amazon's Prime Day event page, rather than buried in category results, requires more than just submitting on time. It requires an ongoing relationship with Amazon's deals team and a track record of operational reliability.

That relationship is developed across the year, not assembled in the weeks before Prime Day. Deal submissions have fixed windows that are typically months before the event. Missing those windows, or submitting deals that do not meet Amazon's requirements, means losing top placements or scrambling to fix issues at short notice.

Amazon Prime Day advertising: build the foundation early

Amazon Ads data shows that advertisers using sponsored ads during Prime Day saw a 14% increase in sales compared to average category growth, and a 22% uplift in detail page views. Amazon's algorithm rewards early advertising engagement with better ad placements and lower costs when traffic spikes. Brands that activate campaigns in the weeks before Prime Day enter the event in a stronger competitive position.

Key Amazon Prime Day advertising principles:

• Build brand-specific campaign structures at least four to six weeks before the event
• Use a layered approach: Sponsored Products for conversion, Sponsored Brands for visibility, Sponsored Display for remarketing
• Allocate incremental budget for Day 1, where the majority of purchases concentrate
• Monitor bids, budgets, and placements in real time throughout the event
• Review ROAS, new-to-brand metrics, and search term data at the two-week mark after the event, once attribution has settled

Prime Day as the opening act of peak season

The most important strategic reframe for Amazon Prime Day is understanding its role in the broader peak season calendar. Prime Day is not just a standalone event in July. It is the first chapter of a narrative that runs through October Prime and BFCM.

Consumers increasingly treat Prime Day as the beginning of their peak season research. Products they discover or purchase in July influence their consideration in October and November. New customers acquired at Prime Day feed the remarketing audiences that perform at BFCM.

Prime Day's commercial footprint also now extends well beyond Amazon itself. Emerging European marketplaces see meaningful uplifts during the Prime Day window, and the event rewards brands willing to think beyond their primary marketplace.

The post-Prime Day window

One aspect of Amazon Prime Day strategy that is often overlooked is what happens immediately after the event. The weeks following Prime Day are valuable for several reasons:

• Consumers who browsed but did not buy are still in a purchase mindset
• New customers acquired during the event are at their most receptive to follow-up communications
• Category rankings earned during the event take time to decay and can be maintained with continued advertising
• Inventory restocking decisions made now directly determine October Prime readiness

That is the essence of a year-round Amazon Prime Day strategy. The event itself is four days. The preparation, the relationships, the post-event follow-through, and the integration with the rest of the peak season calendar make it something that demands attention across the entire year.

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