How to conduct an internal audit to forestall IRD scrutiny

Did you know? The Hong Kong Inland Revenue Department (IRD) conducted over 1,800 tax audits in the 2023-24 financial year, nearly half of which involved offshore profit claims. With the implementation of new regulations such as the Global Minimum Tax (Pillar Two) and stricter transfer pricing rules, Hong Kong's tax environment is evolving rapidly. For businesses, conducting a proactive internal tax audit has become a critical strategy to avoid massive penalties, back taxes, and reputational damage. This guide details how to conduct an effective internal audit in 2025 to preempt IRD scrutiny and ensure corporate compliance.

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Shifts in the Hong Kong IRD Scrutiny Landscape in 2025

In recent years, the Hong Kong IRD has significantly intensified its enforcement efforts, focusing particularly on offshore profit claims, transfer pricing arrangements, and cross-border related-party transactions. The IRD's "Assess First, Audit Later" system combines computerized risk assessment with professional judgment to identify high-risk cases for investigation.

In line with government budgetary priorities and the IRD's enhanced audit capabilities, enterprises should expect closer scrutiny over intra-group transfer pricing, offshore profit claims, and the adequacy of documentation. Conducting a proactive internal audit serves as your first line of defense against potential tax adjustments, penalties, and operational disruptions.

Why Is an Internal Tax Audit More Important Than Ever?

Hong Kong's territorial source principle of taxation relies on voluntary compliance by taxpayers. Although the IRD does not operate a formal "voluntary disclosure program" like some other jurisdictions, it actively encourages taxpayers to make full voluntary disclosures regarding omissions or under-declarations. Taxpayers who take timely and complete action can receive substantial penalty concessions.

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Top 5 IRD Audit Triggers You Must Address

1. Offshore Profits Claim – The #1 Audit Trigger

The Inland Revenue Department (IRD) adopts an exceptionally rigorous approach to reviewing offshore profits claims, particularly in light of Hong Kong's territorial source principle of taxation and competitive corporate tax rates. The IRD closely scrutinises whether profits genuinely originate outside Hong Kong or merely represent tax avoidance arrangements.

2. Missing Transfer Pricing Documentation

With the Inland Revenue Department (IRD) tightening its scrutiny of cross-border related party transactions in 2025, transfer pricing documentation has become a critical area of compliance. Hong Kong adopts a three-tiered documentation framework aligned with OECD standards.

3. Inadequate Record Keeping

Incomplete and improper record keeping is one of the most common audit triggers. Hong Kong law requires companies to maintain accurate financial records that clearly show transactions in intervals of six months, and all records must be retained for at least seven years.

• Detailed General Ledgers: Recording all transactions
• Bank Statements and Reconciliation Statements
• Invoices (Sales and Purchases)
• Contracts and Agreements (including related party arrangements)
• Shipping and Delivery Documents
• Transfer Pricing Documentation (Master File, Local File)
• Supporting Evidence for Offshore Profit Claims

4. Late Filing and Non-Compliance

Under Section 51 of the Inland Revenue Ordinance (IRO), failure to submit Profits Tax Returns on time triggers escalating enforcement actions with severe consequences:

• Fixed penalty: Up to HK$10,000
• Additional tax: Up to three times the amount of tax undercharged
• Potential court summons in extreme cases
• Continuous non-compliance may lead to company winding-up

5. Other High-Risk Indicators

• Reported profits fluctuate significantly year-on-year without reasonable explanation
• Abnormally low profit margins compared to industry benchmarks
• High levels of director loans or related-party receivables
• Discrepancies between tax returns and audited financial statements
• Aggressive tax planning structures lacking commercial substance

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Your Step-by-Step Internal Audit Framework

Adopt a Risk-Based Approach

Rather than attempting to review every transaction and compliance area, an effective internal audit should focus on areas that pose the greatest financial and operational risks. For Hong Kong enterprises, high-risk areas typically include:

• Offshore profit claims and supporting documentation
• Transfer pricing policies and related-party transactions
• Tax compliance and expense tracking
• Record keeping and documentation adequacy

Implement Regular Review Cycles

Waiting until year-end to conduct audits can lead to surprises and leave insufficient time to implement corrective actions. Best practice recommendations include:

1. Quarterly Reviews: Monitor high-risk areas such as related-party transactions, offshore income documentation, and expense categorization.
2. Semi-Annual Comprehensive Reviews: Conduct broader assessments of tax positions, compliance status, and documentation adequacy.
3. Annual Tax Health Check: Perform a comprehensive internal audit 6-12 weeks before the financial year-end to allow time for remedial actions.

Comprehensive Internal Audit Checklist

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How to Handle Self-Discovered Issues

Voluntary Disclosure Procedures

When an internal audit identifies significant compliance issues, voluntary disclosure offers the best opportunity to secure penalty mitigation. The Inland Revenue Department's penalty policy distinguishes based on varying levels of cooperation:

• Full voluntary disclosure before challenge: Maximum penalty mitigation available.
• Prompt and full disclosure upon challenge: Penalty is approximately 100% of the tax undercharged.
• Incomplete or delayed disclosure: Penalty can be up to 300% of the tax undercharged.

Steps for Effective Voluntary Disclosure

1. Act promptly: Speed is crucial—the earlier the disclosure, the more lenient the treatment.
2. Provide complete information: Fully disclose all material facts, affected years, and tax computations.
3. Quantify the shortfall: Calculate the tax undercharged, along with the underlying computations.
4. Propose a solution: Suggest payment terms or adjustment proposals for the IRD's consideration.
5. Demonstrate sincerity: Explain the corrective measures implemented to prevent recurrence of the issue.

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Key Compliance Priorities for 2025 Not to Be Overlooked

Transfer Pricing Documentation Deadlines

For companies whose financial year ended on 31 December 2024, the master file and local file must be prepared by 30 September 2025 (within 9 months after the end of the financial year). Even if exempt from filing requirements, the calculations for the exemption thresholds should be documented.

Global Minimum Tax Compliance (Large MNEs)

The Inland Revenue (Amendment) (Minimum Tax on Multinational Enterprise Groups) Ordinance passed on 6 June 2025 applies a 15% global minimum tax rate to multinational enterprise (MNE) groups with annual consolidated revenue ≥ EUR 750 million. Affected groups must:

• Assess effective tax rates on a jurisdictional basis
• Calculate potential top-up tax liabilities
• Prepare for compliance with the Hong Kong Minimum Top-up Tax (HKMTT)
• Align with the requirements under the OECD Pillar Two framework

Intensified Scrutiny of Offshore Claims

In light of the IRD's increasingly stringent scrutiny of offshore claims, enterprises claiming offshore status should comprehensively review the sufficiency of their offshore documentation and verify that operational evidence supports the offshore claims (rather than relying solely on contractual arrangements).

In today's evolving tax landscape, waiting for the tax authorities to discover compliance issues is a high-risk strategy that could lead to substantial financial penalties and business disruption. By implementing a proactive internal audit program focused on high-risk areas, maintaining robust documentation, and staying abreast of regulatory developments, your business can navigate Hong Kong's tax environment with confidence. Remember: in tax compliance, the cost of prevention is always lower than the cost of correction.