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 
Do not send personal or sensitive information when using email links.

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