On Tuesday, May 20, 2025, Mass Bay Credit Union will upgrade systems between 10 pm and 12 midnight. Online banking, our mobile app, and telephone banking may experience an interruption in service. We apologize in advance for any inconvenience.
xContact Us
How can we help you?
Email
Please fill out the form below to email us. We will respond as soon as possible. If you need faster service, please call us at 617-269-2700. Please DO NOT include personal information such as account numbers, social security number, or any other confidential information via this e-mail.
Phone
Our Main Number is: (617) 269-2700
For Lost or Stolen Debit Cards: (800) 472-3272
Call Center Hours:
Monday 8:30 AM — 4:00 PM
Tuesday 8:30 AM — 4:00 PM
Wednesday 8:30 AM — 4:00 PM
Thursday 8:30 AM — 4:00 PM
Thursday 8:30 AM — 4:00 PM
Friday 8:30 AM — 4:00 PM
Saturday 8:30 AM — 1:15 PM
24-hour Telephone banking system: (617) 269-2700, Press 9.Saturday 8:30 AM — 1:15 PM
Please use our contact form to the left or email memberservices@massbaycu.org
Fax
South Boston: (617) 269-2725
Quincy Branch: (617) 481-1358
Everett Branch: (617)-294-2196
Quincy Branch: (617) 481-1358
Everett Branch: (617)-294-2196
Seaport Branch: (857) 277-0664