While we are pleased to provide partial access to some branch lobbies, please know that online and mobile banking, drive-up and telephone are still the best ways for you to work with Greylock, now and for the foreseeable future. These great services not only provide improved convenience, they also provide enhanced safety for you and our staff.

We are available 24/7 at (413) 236-4000

For Updated Branch Hours CLICK HERE

For Member Updates CLICK HERE

For Business Member Updates CLICK HERE

Online Banking for Business

greylock federal credit union online banking on desktop and laptopManage your business accounts with ease; Move your money, monitor your money, deposit money, manage your money, and more!

New Features

  • Up-to-the-minute account balances and transactions
  • Easily click and drag to transfer money
  • View upcoming bills and make payments from the home screen
  • Use Trends to track your expenses and create budgets
  • Access your accounts on-the-go with mobile banking
  • Person-to-Person transfers using Popmoney®
  • Online and mobile banking are very secure with multiple layers of authentication to protect your information

Operating System & Browser Requirements

The following operating systems and web browsers are supported by our new Online Banking system:

  • Windows 7 or newer
  • Mac OS 10.8 or newer
  • Internet Explorer 10.0 or newer
  • Mozilla Firefox (Current Version)
  • Google Chrome (Current Version)
  • Apple Safari 6 or newer


  • Access your electronic bills in one location
  • Schedule payments based on information from your electronic bill
  • Send overnight and next day payments (fee applies)
  • Categorize payees by type

The following software and web browsers are not be supported by our new Online Banking system: Microsoft Internet Explorer 7.0, 8.0, 9.0, Windows XP, Windows Vista, Mac OS 10.7, Opera.

If you have an older version, please update your operating system or web browser to these minimum requirements.