Bank First (BFC) S-4 Registration of securities issued in business combination transactions

Exhibit 23.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-4 of Bank First Corporation of our report dated March 26, 2019, relating to the consolidated financial statements as of December 31, 2018 and 2017 and for each of the years in the three-year period ended December 31, 2018 of Bank First National Corporation and subsidiaries, appearing in the Prospectus, which is a part of this Registration Statement.

We also consent to the reference to our firm under the heading “Experts”.

/s/ Wipfli LLP

Atlanta, Georgia

January 24, 2020