Cross-Border E-Commerce: How to Sell Internationally [2026]

Cross-border e-commerce means selling products to customers in other countries — and it is one of the fastest-growing opportunities for online sellers in 2026. Southeast Asia’s online retail market alone exceeds US$100 billion, with platforms like Shopee, Lazada, TikTok Shop, Amazon, and Temu making it easier than ever to reach international buyers. This complete guide walks you through how to start selling internationally: from customs duties and shipping logistics to cross-border payments and fulfilment operations.