Company: ADP
Filing Date: 2025-05-07
Form Type: 424B2
Source: 0001193125-25-114878
Chunk: 28

Company: AUTOMATIC DATA PROCESSING INC
Filing Date: 2025-05-07
Form: 424B2
Chunk 28
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 assumes that the Notes are not treated as contingent payment debt instruments. Payments of Interest Stated interest on a Note will be taxable to you as ordinary interest income at the time it accrues or is received, in accordance with your method of accounting for U.S. federal income tax purposes. Sale or Other Taxable Disposition of the Notes Upon the sale or other taxable disposition of a Note, you will recognize taxable gain or loss equal to the difference between the amount realized on the sale or other taxable disposition and your adjusted tax basis in the Note. Your adjusted tax basis in a Note will equal the cost of your Note. For these purposes, the amount realized does not include any amount attributable to accrued interest, which is treated as described under “Payments of Interest” above. Gain or loss realized on the sale or other taxable disposition of a Note will generally be capital gain or loss and will be long-term capital gain or loss if at the time of the sale or other taxable disposition the Note has been held for more than one year. Long-term capital gains recognized by non-corporatetaxpayers are subject to reduced tax rates. The deductibility of capital losses is subject to limitations. Tax Consequences to Non-U.S.Holders This section applies to you if you are a Non-U.S.Holder. You are a Non-U.S.Holder if you are a beneficial owner of a Note that is, for U.S. federal income tax purposes:

| • |     | a nonresident alien individual; |

| • |     | a foreign corporation; or |

| • |     | a foreign estate or trust. |

You are not a Non-U.S.Holder if you are a nonresident alien individual present in the United States for 183 days or more in the taxable year of disposition of a Note, or if you are a former citizen or former resident of the United States, in either of which cases you should consult your tax adviser regarding the U.S. federal income tax consequences of owning or disposing of a Note. Payments on the Notes Subject to the discussion below under “Backup Withholding and Information Reporting” and “FATCA Legislation,” payments of principal and interest on the Notes by the Company or any paying agent to you will not be subject to U.S. federal income or withholding tax, provided that, in the case of interest,

| • |     | you do not own, actually or constructively, ten percent or more of the total combined voting power of all classes 
 of stock of the Company entitled to vote;                                                                         |