Company: DLX
Filing Date: 2025-03-10
Form Type: DEF 14A
Source: 0000027996-25-000107
Chunk: 3

Company: DELUXE CORP
Filing Date: 2025-03-10
Form: DEF 14A
Chunk 3
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light Saving Time                                                                                                                                                                                                    
 Online check-in begins at 2:30 p.m.                                                                                                                                                                                                                                    
 Online at www.virtualshareholdermeeting.com/DLX2025                                                                                                                                                                                                                    |
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| Approximate Mail Date: |     | Monday, March 10, 2025                                                                                                                                                                                                                                                 |
| Record Date:           |     | Shareholders of record at the close of business on February 24, 2025, are entitled to vote at the meeting and at any adjournment thereof. Each share of common stock is entitled to one vote for each director candidate and one vote for each of the other proposals. |

| Items of Business                                                                           |     | Board's Recommendation |     | Page Reference |
| Election of nine directors                                                                  |     | FOR EACH NOMINEE       |     | Page7          |
| Advisory vote to approve the compensation of our named executive officers                   |     | FOR                    |     | Page52         |
| Approval of Amendment No. 2 to the Deluxe Corporation Stock Incentive Plan                  |     | FOR                    |     | Page53         |
| Ratification of PricewaterhouseCoopers as our independent registered public accounting firm |     | FOR                    |     | Page61         |

In addition, any other business properly presented may be acted upon at the meeting.

By Order of the Board of Directors,

Jeffrey L. Cotter

Chief Administrative Officer, Senior Vice President and General Counsel

March 10, 2025

#### How to Vote in Advance
It is important that your shares be represented at the annual meeting. Regardless of whether you plan to attend the virtual annual meeting, please vote as soon as possible to ensure the presence of a quorum and save Deluxe further solicitation expense. Voting by telephone, the internet, or mail will not limit your right to vote at or to attend the virtual annual meeting.

| Method    |     | Step-by-Step Instructions                                                                                                                                                                                                  |     | Voting Deadline                                                                                                                                                            |
| Internet  |     | Instructions can be found on the Internet Notice. The internet procedures are designed to (1) verify your identity, (2) provide voting instructions, and (3) confirm those voting instructions have been properly recorded 
 •Go to www.proxyvote.com                                                                                                                                                                                                   
 •You will need the 16-digit control number on your Internet Notice, proxy card or voter instruction card                                                                                                                   |     | •11:59 p.m. EDT on April 23, 202