Forrester forecasts that US B2B eCommerce will reach $1.8 trillion and account for 17% of all B2B sales in the US by 2023. At the end of 2018, Forrester expects eCommerce to have reached $1.1 trillion and represent 12% of total B2B sales in the US. We forecast a compound annual growth rate (CAGR) of 10% for B2B eCommerce over the next five years. This report defines the potential of the US B2B eCommerce space and what B2B digital business professionals must do to take advantage of the opportunity.