Summit Credit Union Routing Number: Wisconsin Banking Guide

What is the Summit Credit Union routing number?

Summit Credit Union uses routing number 275979034 for all member accounts. This nine-digit ABA routing number is required for setting up direct deposits, ACH transfers, wire transfers, and automatic bill payments.

Summit Credit Union is headquartered in Madison, Wisconsin, and serves over 225,000 members with more than $5 billion in assets. Founded in 1935, Summit has grown to become one of the largest credit unions in the state with branches across southern Wisconsin.

How to find your Summit routing number

Routing number 275979034 is printed on the bottom-left corner of your Summit Credit Union checks. You can also find it by logging into Summit's online banking platform or mobile app and viewing your account details.

All Summit members use the same routing number regardless of which branch they opened their account at. The 275 prefix indicates this routing number is assigned through the Federal Reserve Bank of Chicago, which serves the Wisconsin region.

Summit wire transfers and ACH payments

For domestic wire transfers, Summit Credit Union uses routing number 275979034 through the Fedwire system. Members can initiate outgoing wires online, at a branch, or by contacting member services during business hours.

ACH transactions such as payroll direct deposits, tax refunds, Social Security payments, and recurring bill payments all use this routing number. Summit follows Federal Reserve ACH processing schedules for settlement.

Summit Credit Union business banking

Summit offers business checking accounts, commercial loans, SBA lending, business credit cards, and cash management services. Their business accounts include features like remote deposit capture, ACH origination, and merchant processing.

With branches throughout the Madison, Milwaukee, and Janesville areas, Summit provides convenient access for Wisconsin-based businesses alongside a full suite of digital banking tools.

How Slash compares to Summit Credit Union

Summit provides excellent credit union rates and deep Wisconsin community roots, while Slash offers a modern digital business banking platform that works anywhere. Slash delivers up to 2% cashback, unlimited virtual cards with customizable spending controls, and automated expense categorization.

For businesses looking beyond regional credit union services, Slash provides real-time spend visibility, treasury yield on deposits, multi-entity support, and seamless integrations with accounting software — all without geographic limitations.