On September 22, 2017, the Massachusetts Department of Revenue (the “Department”) officially promulgated a remote vendor sales tax nexus regulation, 830 CMRH.1.7: Vendors Making Internet Sales (the “Regulation”).  The Regulation sets forth the following bright-line nexus threshold:

An Internet vendor with a principal place of business located outside the state that is not otherwise subject to tax is required to register, collect and remit Massachusetts sales or use tax with respect to its Massachusetts sales […] if during the preceding 12 months […] it had in excess of […]” (1) “$500,000 in Massachusetts sales from transactions completed over the Internet […]”; and (2) “made sales resulting in a delivery into Massachusetts in 100 or more transactions.