Telephone and Fax

608-243-5000 or 800-236-5560

fax - 608-243-5027

Mortgage inquiries
608-243-5000 or 800-236-5560 option 2

Secured Messaging and Email

if you have specific questions about your account, please log into Online Branch and use the Message feature to send us a secured message.

If you have a general question or would like to send feedback, send us an email at

Mailing Address

Correspondence, deposits, and other physical mail

For regular mail, please use Summit's general mailing address:

PO Box 8046
Madison, WI 53708-8046

For overnight envelopes, please use the Summit headquarter's physical address (unless your recipient specifies otherwise):

4800 American Parkway
Madison, WI 53718