<SEC-DOCUMENT>0000892712-21-000222-index.html : 20210514
<SEC-HEADER>0000892712-21-000222.hdr.sgml : 20210514
<ACCEPTANCE-DATETIME>20210514160214
ACCESSION NUMBER:		0000892712-21-000222
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20210514
DATE AS OF CHANGE:		20210514
EFFECTIVENESS DATE:		20210514

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST BUSINESS FINANCIAL SERVICES, INC.
		CENTRAL INDEX KEY:			0001521951
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				391576570
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-256132
		FILM NUMBER:		21924422

	BUSINESS ADDRESS:	
		STREET 1:		401 CHARMANY DRIVE
		CITY:			MADISON
		STATE:			WI
		ZIP:			53719
		BUSINESS PHONE:		608-238-8008

	MAIL ADDRESS:	
		STREET 1:		401 CHARMANY DRIVE
		STREET 2:		PO BOX 44961
		CITY:			MADISON
		STATE:			WI
		ZIP:			53744

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	First Business Financial Services, Inc.
		DATE OF NAME CHANGE:	20110527
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>fbizs8.htm
<DESCRIPTION>FORM S-8
<TEXT>
Document 1 - file: fbizs8.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>exhibit51.htm
<DESCRIPTION>OPINION OF GODFREY & KAHN, S.C.
<TEXT>
Document 2 - file: exhibit51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>exhibit232.htm
<DESCRIPTION>CONSENT OF CROWE LLP
<TEXT>
Document 3 - file: exhibit232.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>exhibit51_1.jpg
<TEXT>
Document 4 - file: exhibit51_1.jpg

</DOCUMENT>
</SEC-DOCUMENT>