---
ticker: PAYX
company: Paychex Inc.
filing_type: 10-K
year_current: 2026
year_prior: 2025
risks_added: 15
risks_removed: 10
risks_modified: 122
risks_unchanged: 57
source: SEC EDGAR
url: https://riskdiff.com/payx/2026-vs-2025/
markdown_url: https://riskdiff.com/payx/2026-vs-2025/index.md
access: public_preview
generated: 2026-09-28
---

# Paychex Inc.: 10-K Risk Factor Changes 2026 vs 2025

> Source: U.S. Securities and Exchange Commission (EDGAR)  
> Generated: 2026-09-28  
> All data extracted directly from official filings. No hallucinated content.

## AI Risk Brief

> **AI interpretation layer.** The brief below was generated by an AI model from the deterministic diff. AI never invents facts.

> **New and revised disclosures highlight software defects, continuity failures, acquisitions, and cyber threats, broadening operational and technology risks.**

- **Direction:** More concerning
- **Themes:** Cybersecurity, Technology and operational resilience, Acquisitions

---

## Summary

| Status | Count |
|--------|-------|
| New risks added | 15 |
| Risks removed | 10 |
| Risks modified | 122 |
| Unchanged | 57 |

---

## Selected change

This public preview includes one change. Pro access provides the complete comparison and historical data.

## New in Current Filing: We may experience software defects, undetected errors, and development delays, which could damage our relationship with customers, decrease our potential profitability and expose us to liability.

Our solutions rely on software and computing systems, including generative and agentic AI solutions, that can encounter development delays, complexities with integrating new technologies, and the underlying software may contain undetected errors, bias, viruses, or defects. Defects in our solutions, errors or delays caused by our solutions and generative AI solutions not working as anticipated could result in additional development costs, diversion of technical and other resources from our other development efforts, loss of credibility with current or potential customers, harm to our reputation and exposure to liability. In addition, we rely on technologies and software supplied by third parties that may also contain undetected errors, bias, viruses, or defects that could have a material adverse effect on our business, financial condition, results of operations and cash flows.

---

## Source filings

- [2026 10-K filing on SEC EDGAR](https://www.sec.gov/Archives/edgar/data/723531/000119312526307785/0001193125-26-307785-index.htm)
- [2025 10-K filing on SEC EDGAR](https://www.sec.gov/Archives/edgar/data/723531/000095017025095300/0000950170-25-095300-index.htm)

[View the full comparison with Pro](https://riskdiff.com/payx/2026-vs-2025/full/)

*Data sourced from SEC EDGAR. Last updated 2026-09-28.*