However, those numbers pale in comparison to the predictions financial analysts and industry experts are suggesting for the next three years. In 2016, 2017 and 2018, sources say the total projected U.S. retail ecommerce sales will come in around $392.5, $440.4, and $491.5 billion, respectively. If those numbers hold true, that will be more than a 41 percent growth from this year to the end of 2018.