Contents
What?
The Base Index report for September 2025 indicates a strong start to autumn for Polish e-commerce. Online sales increased by 7.9% compared to September 2024, primarily due to an increase in the number of transactions. September proved to be a month in which e-commerce continued to grow, despite seasonal fluctuations.
Why?
This growth is significant because it indicates the growing role of e-commerce in the Polish economy. The increased number of orders suggests that online shopping is becoming a daily choice for Poles, and changes in consumer behavior, such as more frequent purchases of smaller items, are impacting market stability. Furthermore, the increase in foreign sales demonstrates that Polish e-commerce is gaining ground on international markets, underscoring its global nature.
For whom?
This report is essential for online store owners, e-commerce managers, market analysts, and online marketing specialists. It provides them with valuable information on online sales trends, which can help them make decisions regarding sales strategies, marketing, and international market development.
Background to the topic
The e-commerce market in Poland has been growing dynamically for several years, gaining increasing popularity among consumers. September, the beginning of autumn, is traditionally the time when people return to shopping after the summer break. The increase in orders and the development of international sales are important indicators of the continued growth of e-commerce, which is becoming an increasingly integral part of everyday life.
Sales increase compared to the previous year
Data for September 2025 shows a 7.9% compared to September 2024. This increase is primarily driven by a 7.8% increase in the number of orders , indicating that more and more consumers are choosing to shop online. It's worth noting that while the number of transactions is increasing, the average basket size has remained stable.
What is behind the increase in orders?
The increase in the number of transactions indicates that e-commerce is becoming the primary purchasing channel in Poland, with consumers regularly making purchases online. This is due to the increasing convenience of online shopping and the wide availability of products.
Month-on-month changes – increase in orders, decrease in average basket value
Compared to August 2025, September saw a 3.4% increase in the Base Index. The number of orders increased by 4.2% , while the average basket value decreased by 0.8% . This decrease is the result of an increase in smaller purchases, which are typical of the pre-autumn period.
Why is a decline in the average basket value a natural phenomenon?
These types of changes are typical of periods when consumers make many smaller purchases, especially before a change of season or as part of a promotion, which results in a lower average value of a single purchase.
Growth in international sales – Poland is conquering foreign markets
International sales, or cross-border transactions, continue to gain importance. September data indicates a 14.8% increase in foreign sales compared to the previous year. 18.4% of Polish online stores' total sales come from foreign markets, demonstrating that Polish e-commerce is gaining increasing popularity abroad.
How does Polish e-commerce attract foreign consumers?
Polish retailers are increasingly reaching consumers abroad thanks to modern logistics solutions, improved payment processes, and better customer service. Furthermore, marketing strategies tailored to international markets are helping Polish online stores expand into new markets.
The "supermarket" category is in a leading position
Growth in supermarket was one of the main trends in September 2025. Food products, everyday items, and health products saw a significant increase in sales, which may be a result of preparations for the upcoming fall.
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Marcin Stadnik
e-commerce advisor
The author is a manager with extensive experience in e-commerce, sales strategy, and content marketing. He is a digital practitioner and consultant with over 15 years of experience in e-commerce projects, sales strategy, and online business development, as well as 25 years of experience in broadly defined distribution (offline and online). He specializes in creating and implementing effective solutions for online stores, supporting companies in developing their digital presence. He co-creates appropriate strategies for e-businesses, conducts audits, and oversees marketing activities—always combining analytical knowledge with market practice. He is the author and co-author of content published on the swiatcyfrowy.pl website—based on his many years of consulting, analytical, and operational experience. The materials created are intended to provide reliable, valuable knowledge that truly supports the development of online businesses. The content here is designed to address the real challenges and needs of companies operating in the e-commerce environment (the digital world).
