Even as total worldwide retail sales declined by 3.0% in 2020, retail ecommerce growth boomed to 27.6%. Ecommerce growth will decelerate substantially in 2021 to 14.3% as brick-and-mortar sales recover.

Despite a challenging year for retail in 2020, we estimate that worldwide retail ecommerce sales posted a 27.6% growth rate for the year, with sales reaching well over $4 trillion. This represents a substantial uptick from our mid-pandemic assessment that global ecommerce would decelerate to 16.5% growth and demonstrates the remarkable extent to which consumers transitioned to ecommerce last year.

Global retail ecommerce sales will decelerate to a 16.5% growth rate in 2020. Even as consumers transitioned en masse to ecommerce during the pandemic, the drag caused by multiple recessions internationally has reduced the overall outlook.

The UK is something of a global leader when it comes to retail ecommerce. As a proportion of total retail sales, only China will trump the UK in ecommerce sales penetration this year (41.2% versus 30.9%, respectively). The UK’s fulfillment and delivery infrastructure is, as one would expect, quite mature.

Among holiday shopping events in China, many outside the country have probably only heard of Singles’ Day. However, 618—which ecommerce giant JD.com launched to commemorate the company’s founding day—is gaining popularity. And given the global interest in a post-pandemic retail rebound, this year’s event was particularly worthy of attention.