Professional Services
31 organizations, 61 confirmed incidents.
Professional Services covers accounting, consulting and other advisory firms holding client financial, tax and business records as part of an engagement. There is no sector-specific breach-notification law; a firm reports an incident under the general state or national data-breach notification statute covering the individuals whose data was exposed, and a publicly traded client's own SEC Item 1.05 disclosure obligation can be triggered separately if the exposed data was material to that client's own business.
Incidents by year
| Year | Confirmed incidents |
|---|---|
| 2026 | 8 |
| 2025 | 10 |
| 2024 | 7 |
| 2023 | 10 |
| 2022 | 7 |
| 2021 | 5 |
| 2020 | 1 |
| 2019 | 4 |
| 2018 | 1 |
| 2017 | 4 |
| 2015 | 1 |
| 2013 | 1 |
| 2012 | 2 |
Top organizations by confirmed incidents
Questions and answers
How many confirmed incidents involve Professional Services organizations on Breach Census?
61 confirmed incidents across 31 organizations in the Professional Services sector are recorded on Breach Census.
Which year had the most confirmed Professional Services incidents?
2025, with 10 confirmed incidents, the most of any year on record for this sector.
Which attack types are most common in the Professional Services sector?
Among Professional Services sector incidents that carry an attack-type classification, the most common are Unauthorized Access/Disclosure, Hacking/IT Incident, Phishing Attack.
What counts as a confirmed incident for the Professional Services sector?
An incident counts here once its primary organization carries the Professional Services sector label and the incident itself has reached the confirmed status described on the Methodology page; a bare claim or press report is not enough.