Registration No. 333-283061

Registration No. 333-181435

Registration No. 333-150674

Registration No. 333-48967

Registration No. 333-03265

Registration No. 033-57261

Registration No. 033-53585

As filed with the Securities and Exchange Commission on May 7, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-283061

Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-181435

Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-150674

Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-48967

Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-03265

Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 033-57261

Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 033-53585

UNDER THE SECURITIES ACT OF 1933

DELUXE CORPORATION

(Exact name of registrant as specified in its charter)

801 S. Marquette Ave.

Minneapolis, Minnesota 55402

(Address of principal executive offices,

including zip code)

RUBINETTI INDUCEMENT AWARD

DELUXE CORPORATION 2012 LONG-TERM INCENTIVE PLAN

DELUXE CORPORATION 2008 STOCK INCENTIVE PLAN

1998 DELUXESHARES PLAN

DELUXE CORPORATION STOCK INCENTIVE PLAN

EMPLOYEES' STOCK PURCHASE PLAN

DELUXE CORPORATION STOCK INCENTIVE PLAN

(Full title of the plan)

Jeffrey L. Cotter

SVP, Chief Administrative Officer and General Counsel

Deluxe Corporation

801 Marquette Avenue South

Minneapolis, Minnesota 55402

(651) 483-7111

(Name, address and telephone number,

including area code, of agent for service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

DEREGISTRATION OF SECURITIES

Deluxe Corporation, a Minnesota corporation (the “Registrant”), is filing these post-effective amendments (the “Post-Effective Amendments”) with the Securities and Exchange Commission (the “SEC”) to deregister any and all shares of the Registrant’s common stock, par value $1.00 per share (the “Common Stock”), previously registered but otherwise unsold or otherwise unissued under the following registration statements on Form S-8 (the “Registration Statements”), together with any and all plan interests and other securities registered thereunder:

For the avoidance of doubt, the Registrant is not registering any additional shares of Common Stock pursuant to the plans referenced above. These Post-Effective Amendments to the Registration Statements described above are being filed to deregister all shares of Common Stock and, as applicable, plan interests that were previously registered under the Registration Statements and remain unsold or otherwise unissued under the applicable plans referenced above. The Registration Statements are hereby amended, as appropriate, to reflect the deregistration of such securities. After giving effect to these Post-Effective Amendments, there will be no securities registered by the Company pursuant to the Registration Statements.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Minneapolis, State of Minnesota, on May 7, 2026.

Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statement has been signed by the following persons in the capacities indicated on May 7, 2026.