Peak Season is the busiest period of the year for online sales. It can no longer be understood as just a handful of discount days concentrated at the end of November. For Amazon sellers and other marketplace merchants across Europe, it has become an increasingly long, competitive and complex period to manage.

In 2026, the season effectively begins in October with Prime Big Deal Days and continues with Singles’ Day, Black Friday, Cyber Monday, Christmas and, in Spain, Three Kings’ Day. In practice, this means roughly three months of increased sales activity, during which demand accelerates, shopping habits shift and brands compete for a significant share of their annual revenue.

The opportunity is clear, but so is the pressure it creates. Selling more during these weeks requires enough inventory, greater investment in visibility, tighter logistics coordination and the ability to absorb a significant share of those costs before the revenue from those sales becomes available. That is why preparing for Peak Season is no longer simply about launching promotions or increasing advertising budgets. It is about understanding how demand is likely to behave and making sure the business can keep up with it.

How Peak Season is spread across Spain

Traditional shopping dates tell only part of the story. Each marketplace runs its own campaigns and, in many cases, extends promotions across several days or even weeks.

The result is that Black Friday stopped being just a single Friday a long time ago. For many shoppers and sellers, November now feels like an almost continuous sequence of promotional campaigns.

A Q4 that matters more every year

Data from Spain clearly shows just how important the final quarter of the year has become. In 2025, Spanish ecommerce exceeded €114.8 billion in annual revenue for the first time, up 20.6% from 2024. Between October and December alone, €31.418 billion was generated, representing 22% year-on-year growth, while more than 575 million transactions were recorded. These are the latest figures published by Spain’s National Commission on Markets and Competition.

View the CNMC ecommerce data

The trend over recent years is particularly striking:

The figures come from the CNMC’s historical data series: Q4 revenue increased from €19.650 billion in 2022 to €22.707 billion in 2023, €25.742 billion in 2024 and €31.418 billion in 2025.

In just three years, therefore, Spain’s Q4 ecommerce volume has increased by around 60%.

This is not just a Spanish phenomenon. European B2C ecommerce reached approximately €842 billion in 2024, up 7% from the previous year, according to the European E-commerce Report produced by Ecommerce Europe and EuroCommerce.

View the European E-commerce Report

The number of digital shoppers also continues to grow. According to Eurostat, in 2025, 78% of internet users in the EU had purchased or ordered goods or services online during the previous 12 months, compared with 62% in 2015.

View Eurostat’s ecommerce data

Peak Season, therefore, is not growing simply because Black Friday is becoming more important. It is growing because the entire digital ecosystem behind it is expanding.

The role of marketplaces and the European opportunity

For sellers, the opportunity does not necessarily end in their home market.

In 2025, more than 100,000 EU-based SMEs selling on Amazon generated over €40 billion in combined sales. Their exports reached €17 billion and, within that figure, €13.5 billion came from trade between EU countries, up from €12 billion the previous year. These figures were published by Amazon itself in April 2026.

View Amazon’s European SME data

This cross-border dimension becomes particularly relevant during major promotional periods. A Spanish seller may be preparing inventory today that, just a few weeks later, ends up in homes in France, Germany, Italy or the Netherlands.

CNMC data shows just how closely connected Spanish ecommerce is to the wider European market. In the fourth quarter of 2025, purchases made from Spain to foreign merchants reached €18.164 billion and 94.6% of that volume went to merchants located within the European Union.

Peak Season is increasingly a European phenomenon. That expands the addressable market, but it also means sellers need to think more carefully about inventory, logistics, pricing and advertising on a country-by-country basis.

The calendar starts before Black Friday

One of the biggest changes in recent years is that the peak shopping season now starts much earlier than the traditional calendar might suggest.

Amazon has confirmed that Prime Big Deal Days will take place on 6 and 7 October 2026 across a number of markets, including Spain, Germany, France, Italy, the Netherlands, Portugal, Belgium, Sweden and the UK. Amazon itself describes the event as the start of the holiday shopping season.

View the official Prime Big Deal Days 2026 announcement

Next comes 11 November and Singles’ Day, which remains much more significant in Asia than in Europe but is becoming increasingly visible in the international promotional calendar. Shortly afterwards comes the most intense part of the season: Black Friday, which falls on 27 November in 2026, followed by Cyber Monday on 30 November.

At this point, treating Black Friday as if it were a single Friday is no longer realistic. In 2025, Amazon extended its European Black Friday Week from 20 November to 1 December, combining Black Friday and Cyber Monday into a campaign lasting almost two weeks.

View Amazon Europe’s 2025 Black Friday Week calendar

December marks the beginning of a different phase. Shoppers gradually become less focused on the discount itself and more concerned with factors such as availability, delivery dates and confidence that an order will arrive on time. In Spain, the shopping season lasts even longer, as Three Kings’ Day creates a second major wave of purchases through 6 January.

For many Spanish shoppers and sellers, Peak Season therefore means a succession of different commercial moments stretching from early October to the beginning of January.

A consumer who is ready to buy, but more demanding

Black Friday remains highly attractive to shoppers. According to the international 2025 E-Commerce Trends: Black Friday Buying Behaviour study, produced by DHL eCommerce based on a survey of 24,000 online shoppers across 24 countries, 33% of European consumers say they buy more during Black Friday.

In Spain, that figure rises to 41%.

View DHL eCommerce’s Black Friday study

However, the same study also reveals another interesting trend. Globally, 71% of shoppers cite discounts and savings as one of the main reasons they buy during the event, yet only 50% say they fully or largely trust the offers and prices they see. In Europe, trust falls to 39%, while in Spain it reaches 53%.

Consumers are still looking for a good deal, but that does not mean they will accept every discount at face value.

For brands, this shift matters. Competing purely on price can increase sales volume while also eroding margins, precisely when advertising competition, inventory requirements and logistics pressure are all increasing.

Selling a lot and having a successful season are not necessarily the same thing.

Selling more also requires more resources

This is one of the easiest factors to underestimate ahead of Q4.

If a seller expects to double sales, they do not simply need twice as much inventory. They may also need more marketing budget, greater logistics capacity, more transportation and additional headroom to absorb returns or unexpected costs.

There is also inevitably a gap between the moment many of those costs are incurred and the moment the revenue from those sales becomes available.

There is no need to turn this into a financial explanation to understand the implication: the faster sales volume grows, the more important it becomes to have enough liquidity to keep responding to demand.

An ecommerce business can be breaking revenue records while simultaneously facing greater cash-flow pressure than it did a few months earlier.

That is why this season is not only a commercial test. It is also a test of operational capacity. Wannme helps merchants improve their daily liquidity so they can adapt as needs change from one day to the next. If you want to find out how to access 90% of the previous day’s sales so you can earn more and grow faster, contact us.

Black Friday is prepared long before November

Perhaps one of the clearest ways to understand the real Peak Season calendar is to look at the deadlines Amazon gives its own sellers.

For 2026, Amazon has stated that, in order to maintain Prime eligibility during these events, inventory intended for Prime Big Deal Days had to arrive at its European fulfilment centres by 9 September. For Black Friday Week, the stated deadline is 21 October.

Amazon also explains that its fulfilment centres focus heavily on receiving inventory during September and October, before shifting their priority towards order processing during November and December.

View the official 2026 Peak Season deadlines in Amazon Seller Central