Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q for the quarter ended June 30, 2023 (the “Form 10-Q”)of Paycom Software, Inc. (the “Company”), the undersigned hereby certify in their capacities as Chief Executive Officer and Chief Financial Officer, respectively, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to their knowledge:

(1)the Form 10-Q fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(2)the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company as of, and for, the periods presented in the Form 10-Q.

Date: August 3, 2023	By:	/s/ Chad Richison
		Chad Richison
		Chief Executive Officer
		(Principal Executive Officer)
Date: August 3, 2023	By:	/s/ Craig E. Boelte
		Craig E. Boelte
		Chief Financial Officer
		(Principal Financial Officer)

The foregoing certifications are not deemed “filed” with the Securities and Exchange Commission for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and are not to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date hereof, regardless of any general incorporation language contained in such filing.