Resources for vendors to the Commonwealth

NEW: Electronic signatures for W-9s and EFTs for non-Executive departments

​To make processing easier and more efficient, the Office of the Comptroller is now processing Forms W-9 and Electronic Fund Transfer (EFT) Forms through DocuSign with Non-Executive departments. Other forms will be made available at a later date.


Electronic signatures will be made available for forms with Executive departments at a later date.

Browser compatibility:

  • Users seeking to download Word or Excel documents from this page should use latest versions of Microsoft Edge, Mozilla Firefox, Safari, or Opera.

  • Google Chrome users should right-click, select 'Save Link As', and select 'Keep' from the notification that pops up.

  • Microsoft Internet Explorer is no longer supported.


Instructions and FAQ


Job Aids


Using VendorWeb, vendors to the Commonwealth of Massachusetts can easily and quickly access their payment information - view scheduled payments, view payment history, and read news and updates of interest to vendors.


COMMBUYS is the official procurement record system for the Commonwealth of Massachusetts' Executive Departments. COMMBUYS offers free internet-based access to all public procurement information posted here in order to promote transparency, increase competition, and achieve best value for Massachusetts taxpayers.

Form 1099

Vendors can access their Form 1099 through VendorWeb. View frequently asked questions about the Form 1099.

Department contact list

Contact the department you do business with for vendor codes, payments, or account changes.

Forms for Vendors

Historical Terms and Conditions

Policies for Vendors