Your Data Breach Notification Obligations: Australia, USA & UK

19 September 2025

For SMEs, understanding when and how to notify regulators after a data breach is critical. Here’s a country-by-country guide with regulators, who it applies to, reporting deadlines, examples, and contact details.

Download our FREE Incident Response Procedure to guide you through the process of what to do in the event of a cyber hack.


Australia

Who It Applies To Regulator & Contact When to Contact Timeframe / Deadline Example
AFS licensees, credit licensees, insurance brokers, super funds ASIC – 1300 300 630, asic.gov.au Significant breaches of license conditions or personal data As soon as practicable, per RG-78 guidance Financial planner loses client personal information
Banks, insurers, super funds, credit unions APRA – 1300 558 849, info@apra.gov.au, apra.gov.au Material security incidents affecting operations Immediately or per CPS 234 / CPS 232 Bank’s online banking system is compromised
Any organization experiencing a cyber security incident ACSC – 1300 CYBER1 (1300 292 371), cyber.gov.au Cybersecurity incidents Report as soon as possible Ransomware attack on a small business network
Businesses handling personal data > $3m turnover, or sensitive info OAIC / NDB Scheme – 1300 363 992, oaic.gov.au Eligible data breaches Within 30 days of becoming aware Health clinic patient records exposed

United States

Who It Applies To Regulator & Contact When to Contact Timeframe / Deadline Example
Businesses that collect consumer personal info; financial institutions under GLBA FTC – 1‑877‑FTC‑HELP, ftc.gov Data breaches or unfair/deceptive practices No fixed hours; notify consumers if required E-commerce site customer database leaked
Publicly traded companies, investment advisers, broker-dealers SEC – 1‑800‑SEC‑0330, sec.gov Material cybersecurity incidents 8-K filing within 4 business days Listed company suffers a network breach
Banks, credit unions, federally regulated financial institutions FDIC – 1‑877‑275‑3342, fdic.gov
OCC – 1‑800‑613‑6743, occ.gov
Federal Reserve – 202‑452‑3000, federalreserve.gov
Computer-security incidents affecting operations Within 36 hours to primary regulator Small bank hacked
Healthcare providers, health plans, clearinghouses HHS / OCR – 1‑800‑368‑1019, OCRComplaint@hhs.gov, hhs.gov PHI breaches 60 days if >500 individuals affected Clinic patient records exposed
All businesses with state residents’ personal info State Attorneys General – see state websites, e.g., CA: oag.ca.gov Data breach affecting residents Varies by state; often immediate notice Retailer leaks customer info in CA, NY
Critical infrastructure operators; DoD contractors CISA – 1‑888‑282‑0870, cisa.gov
DoD / DFARS – dcsa.mil/dfars
Cybersecurity incidents 72 hours Small utility or defense contractor system compromised

United Kingdom

Who It Applies To Regulator & Contact When to Contact Timeframe / Deadline Example
All organizations processing personal data ICO – 0303 123 1113, ico.org.uk Notifiable data breach Within 72 hours Retail business database exposed
Financial firms, banks, insurance, investment advisers FCA – firmnotification@fca.org.uk, fca.org.uk Significant operational or data incidents As per SUP 15, notify promptly Mortgage broker loses client data
Banks, building societies, insurers (dual-regulated) PRA – supervision@bankofengland.co.uk, bankofengland.co.uk Operational or security incidents As per SUP 15, notify promptly Bank IT system compromised
Public electronic communications service providers Ofcom – contact@ofcom.org.uk, ofcom.org.uk Personal data breach under PECR Without undue delay ISP customer data leak
NHS organizations, healthcare providers NHS Digital – enquiries@nhsdigital.nhs.uk, digital.nhs.uk Patient data breach Immediately Clinic patient records exposed

Prompt notification of the correct regulator protects your business, reduces legal risk, and helps safeguard your customers. Keep this guide handy for quick reference.

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