The State of Secure Document Sharing in Accounting Firms (2026)

Post 4 of 10: Regulatory & Compliance Environment

Part of the FileRecall Accounting Research Series

Accounting firms operate under one of the most complex regulatory landscapes in the professional services sector. The documents they handle daily — tax returns, financial statements, payroll records, identity documents, and client financial histories — are subject to multiple overlapping legal frameworks that govern how they must be stored, shared, and protected.

In 2026, the compliance environment has tightened considerably. Regulators have moved from issuing guidance to enforcing it. Firms that cannot demonstrate proactive security measures face real consequences — not hypothetical ones. And the document sharing methods most firms still rely on — email attachments and consumer cloud links — fail to meet the standard regulators now expect.

This post provides a comprehensive overview of the regulatory frameworks that apply to accounting firms in Australia and internationally, and explains what they require in practical terms.

Australia’s Privacy Act 1988 and the Australian Privacy Principles

The Privacy Act 1988 is the cornerstone of data protection law in Australia. It applies to all businesses with an annual turnover of more than $3 million, as well as to all health service providers and businesses that trade in personal information — categories that capture the vast majority of accounting practices.

The Act is given practical effect through the thirteen Australian Privacy Principles (APPs), which set out specific obligations for how personal information must be handled. For accounting firms, the most directly relevant APPs are:

• APP 1 — Open and transparent management of personal information: firms must have a clearly expressed privacy policy and manage personal information in accordance with it.
• APP 5 — Notification of collection: firms must take reasonable steps to notify clients when collecting personal information.
• APP 6 — Use or disclosure of personal information: personal information collected for one purpose cannot be used or disclosed for another purpose without consent.
• APP 11 — Security of personal information: firms must take reasonable steps to protect personal information from misuse, interference, loss, and unauthorised access, modification, or disclosure.
• APP 12 — Access to personal information: individuals have the right to access their personal information held by the firm.

APP 11 is the most directly relevant to document sharing. “Reasonable steps” in a 2026 context means more than password-protecting a PDF. Regulators and courts have increasingly interpreted this to require access controls, audit trails, and active management of who can access sensitive information and for how long.

Sending a client’s tax return as an unencrypted email attachment — where it will sit permanently in the client’s inbox with no access controls, no audit trail, and no ability to revoke — does not meet the APP 11 standard for reasonable steps.

The Notifiable Data Breaches Scheme

The Notifiable Data Breaches (NDB) scheme, which operates under Part IIIC of the Privacy Act, requires entities covered by the Act to notify both the Office of the Australian Information Commissioner (OAIC) and affected individuals when a data breach is likely to result in serious harm.

For accounting firms, a notifiable breach could arise from:

• A client’s tax return being emailed to the wrong recipient
• A shared drive link being forwarded to an unauthorised third party
• A phishing attack that results in client documents being accessed by an attacker
• A ransomware attack that exposes client financial records
• An employee forwarding client files to a personal email account

The notification obligation is not optional. Failure to notify when required can result in regulatory investigation and civil penalties. The reputational consequences of a public NDB notification — which is reported to the OAIC and may become publicly known — can be severe and lasting for an accounting practice.

Controlled-access document sharing reduces breach risk directly. When documents are shared via secure links with expiry controls, access tracking, and instant revocation, the scenarios above are either prevented entirely or detected and contained before they escalate to notifiable breach status.

ATO Digital Security Expectations

The Australian Taxation Office has published digital security guidance for tax practitioners that sets out expectations for how client tax information must be handled. Key requirements include:

• Using secure, encrypted channels for transmitting client tax information
• Implementing multi-factor authentication for practice management systems
• Maintaining access logs for systems that hold client tax data
• Having a documented incident response plan
• Ensuring third-party software and services used in the practice meet appropriate security standards

The ATO’s guidance explicitly identifies email as a high-risk channel for transmitting tax information and recommends the use of secure document sharing platforms as a preferred alternative. Firms that continue to send tax returns and BAS documents via email attachments are operating outside the ATO’s recommended practice and increasing their exposure to both security incidents and regulatory scrutiny.

ASIC Expectations for Financial Services Licensees

Accounting firms that hold an Australian Financial Services Licence (AFSL) or that provide financial advice services are also subject to ASIC’s expectations around information security and client data handling.

ASIC has issued guidance making clear that AFS licensees must have adequate risk management systems — which ASIC has interpreted to include information security controls for client data. Firms providing financial planning, SMSF advice, or other licensed financial services must be able to demonstrate that client financial documents are shared and stored securely.

ASIC has also indicated increasing focus on cyber resilience as part of its supervisory activity, and has taken enforcement action against licensees whose cyber security practices were found to be inadequate.

International Frameworks: GDPR, HIPAA, SOC 2, and ISO 27001

Accounting firms with international clients, or that use cloud platforms with servers located outside Australia, may also need to comply with international data protection frameworks.

GDPR

The EU’s General Data Protection Regulation applies to any firm that handles personal data of EU residents, regardless of where the firm is located. For Australian accounting firms with European clients, GDPR imposes strict requirements around data security, breach notification, data subject rights, and the legal basis for processing personal data.

GDPR’s security requirements — encryption, access controls, audit trails, and the ability to demonstrate compliance — align closely with what controlled-access document sharing platforms provide. Firms that share EU client documents via uncontrolled email attachments face potential GDPR exposure.

HIPAA

For accounting firms that handle financial records for healthcare providers, HIPAA’s requirements around protected health information (PHI) may apply. HIPAA requires administrative, physical, and technical safeguards for PHI — including secure transmission and access controls.

SOC 2

SOC 2 (Service Organisation Control 2) is a voluntary framework that has become a de facto standard for technology and professional services firms handling client data. A SOC 2 audit examines a firm’s controls around security, availability, processing integrity, confidentiality, and privacy.

Accounting firms that pursue SOC 2 compliance — either because clients require it or as a competitive differentiator — must demonstrate that their document sharing practices meet the framework’s security and confidentiality criteria. Uncontrolled email attachments cannot satisfy these requirements.

ISO 27001

ISO 27001 is the international standard for information security management systems. While certification is voluntary, many larger accounting clients and enterprise counterparties now require their advisers to meet ISO 27001 standards as a condition of engagement. Firms pursuing ISO 27001 certification must implement comprehensive information security controls — including for document sharing workflows.

What Compliance Actually Requires From Document Sharing

Across all of these frameworks, certain common requirements emerge consistently. Any document sharing practice used by an accounting firm should be able to demonstrate:

• Encryption — documents protected in transit and at rest
• Access controls — defined permissions for who can access which documents
• Audit trails — a verifiable record of when documents were accessed, by whom, and from where
• Revocation capability — the ability to terminate access to a document after it has been shared
• Expiry controls — automatic termination of access after a defined period
• Breach response capability — the ability to identify and contain a document-related incident quickly

FileRecall’s secure document sharing platform is designed to meet all of these requirements in a single workflow. Documents are shared via controlled-access links with full audit trails, expiry controls, instant revocation, and permanent watermarking — providing accounting firms with a defensible compliance position across the Privacy Act, ATO guidance, and international frameworks.

The Practical Compliance Message

For accounting firm principals and compliance officers, the practical message is straightforward: the document sharing methods your firm uses today are likely to be reviewed in the event of a regulatory inquiry, an audit, or a client complaint. The question regulators and auditors will ask is not “did you try to keep this secure?” but “what reasonable steps did you take?”

A firm that can demonstrate it used a controlled-access document sharing platform with access controls, audit trails, expiry, and revocation is in a fundamentally stronger position than a firm that sent the same document as an email attachment.

The investment in getting this right is modest. The cost of getting it wrong — in penalties, remediation, reputational damage, and lost clients — is not.

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Next in this series: Post 5 — Workflow Realities Inside Accounting Firms →

← Back to: Post 3: The Threat Landscape

View the full series index →

Related Reading

• Secure File Sharing for Accountants — how FileRecall fits into accounting workflows
• Secure Document Viewer — documents viewed in browser, never downloaded
• Access Tracking — full audit trails for every document access
• Expiry Controls — automatically limit how long documents remain accessible
• Instant File Recall — revoke access to any document at any time
• Secure File Sharing for Business — broader business document security context

FileRecall — Secure document sharing for accounting firms. filerecall.com