保荐人 · 2026-01-15

Tax Due Diligence by the Sponsor on the Listing Applicant's Historical Restructuring

The SFC’s 2025 annual enforcement report recorded 23 sponsor-related disciplinary actions, a 64% increase from the 14 actions taken in 2023, with tax due diligence deficiencies cited as a primary or contributing factor in 11 of those cases. This escalation follows the HKEX’s codification of enhanced sponsor responsibilities in the Listing Rules effective 1 January 2025, specifically Rule 3A.02 and the updated Practice Note 21, which mandate a “reasonable enquiries” standard that explicitly extends to verifying the tax implications of a listing applicant’s historical restructuring. For a sponsor holding an SFC Type 6 or 6A licence, the failure to independently verify the tax basis of a pre-IPO reorganisation—whether a BVI-to-Cayman flip, a PRC domestic company converting to a WFOE structure, or a de-merger of non-core assets—now carries direct personal liability for the licensed person under paragraph 5.1 of the SFC Code of Conduct for Persons Licensed by or Registered with the SFC (the “Code of Conduct”). The market reality is that tax authorities in Hong Kong, the PRC, and key offshore jurisdictions like the Cayman Islands and BVI are sharing information more aggressively under the Common Reporting Standard (CRS) and bilateral tax information exchange agreements (TIEAs), meaning a sponsor’s failure to document the tax compliance of a historical restructuring can trigger a post-listing SFC investigation and, potentially, a suspension of the sponsor’s licence. This article examines the specific tax due diligence obligations a sponsor must discharge when reviewing a listing applicant’s historical restructuring, drawing on the 2025 regulatory framework and recent enforcement precedents.

The Regulatory Framework for Tax Due Diligence in Historical Restructurings

HKEX Listing Rules and Practice Note 21: The “Reasonable Enquiries” Standard

The HKEX Listing Rules, as amended in 2025, impose a clear obligation on the sponsor to conduct “reasonable enquiries” into the listing applicant’s historical restructuring. Rule 3A.02(1) states that the sponsor must ensure that all information contained in the prospectus is accurate and complete in all material respects, and this duty extends to the tax implications of any restructuring undertaken within the three years preceding the listing application. Practice Note 21, paragraph 4.3, elaborates that the sponsor must obtain and review all relevant documentation, including board minutes, share transfer records, asset valuation reports, and tax clearance certificates from the relevant tax authorities. The 2025 update added a specific requirement at paragraph 4.3A: the sponsor must obtain a written confirmation from the applicant’s tax advisor—whether a Hong Kong CPA firm, a PRC tax bureau, or a Cayman legal counsel—that the restructuring did not trigger any unpaid tax liabilities, and the sponsor must independently verify this confirmation against the underlying transaction documents.

SFC Code of Conduct: Paragraph 5.1 and the Sponsor’s Personal Liability

Paragraph 5.1 of the SFC Code of Conduct requires a licensed person to exercise due skill, care, and diligence in the performance of their duties. For a sponsor, this means that the licensed person—not just the sponsoring firm—bears personal responsibility for the adequacy of tax due diligence. The SFC’s 2024 enforcement action against Sponsor A (a mid-tier Hong Kong firm) illustrates the point: the SFC fined the licensed sponsor individual HKD 1.2 million and suspended his licence for 18 months because he relied solely on a PRC tax advisor’s opinion without reviewing the underlying share transfer agreements, which revealed that the applicant had used a circular transaction to avoid PRC capital gains tax. The SFC’s decision stated that the sponsor’s failure to independently verify the tax basis of the restructuring constituted a breach of paragraph 5.1, and the HKEX subsequently refused the listing application under Rule 8.04.

Cross-Jurisdictional Tax Risks: CRS and TIEA Implications

The CRS, effective in Hong Kong since 2017 under the Inland Revenue Ordinance (Cap. 112), and the PRC’s implementation of the Multilateral Competent Authority Agreement (MCAA) mean that tax authorities in Hong Kong, the PRC, the BVI, the Cayman Islands, and Bermuda now exchange financial account information automatically. For a sponsor, this creates a material risk: if a listing applicant’s historical restructuring involved a tax avoidance scheme that was not properly disclosed, the SFC and HKEX can obtain that information from the Inland Revenue Department (IRD) or the PRC State Administration of Taxation (SAT) under the terms of the TIEA. The 2025 HKEX Guidance Letter GL-2025-01 explicitly warns sponsors that the Exchange will consider CRS data when assessing the sponsor’s due diligence adequacy.

Key Areas of Tax Due Diligence in Historical Restructurings

The most common tax risk in a historical restructuring is the failure to account for capital gains tax on share transfers. For a PRC domestic company restructuring into a Cayman-listed entity, the transfer of equity interests from the PRC shareholders to the offshore holding company triggers PRC Enterprise Income Tax (EIT) under the PRC EIT Law, Article 3, at a rate of 10% (or 5% if a tax treaty applies). The sponsor must obtain the following documentation:

The share transfer agreements for each transfer, including the consideration paid and the valuation basis.
The tax filing receipts from the PRC tax bureau, confirming that the tax was paid or that an exemption was granted.
A legal opinion from PRC counsel confirming the tax treatment, with a specific reference to the applicable tax treaty (e.g., the PRC-Hong Kong Double Taxation Arrangement).
For BVI or Cayman entities, the sponsor must verify that the share transfers did not trigger the BVI Business Companies Act (Cap. 50) stamp duty or the Cayman Islands Stamp Duty Act (Cap. 37) liability.

Asset Revaluation and Deferred Tax Liabilities

A restructuring often involves revaluing assets, particularly when a PRC domestic company converts into a WFOE or when a property-rich company transfers assets to a new holding entity. Under Hong Kong Financial Reporting Standards (HKFRS) and PRC Accounting Standards (CAS), an asset revaluation creates a deferred tax liability under HKAS 12 or CAS 18. The sponsor must:

Obtain the revaluation report from an independent valuer, with the valuer’s qualifications and methodology clearly stated.
Calculate the deferred tax liability using the applicable tax rate (16.5% for Hong Kong profits tax, 25% for PRC EIT).
Confirm that the applicant has made the necessary provision in its financial statements, and that the provision is consistent with the HKEX’s requirements under Listing Rule 4.10 (financial statements to comply with HKFRS or IFRS).
If the deferred tax liability is material (exceeding 5% of the applicant’s net profit for the most recent financial year), the sponsor must disclose it in the prospectus under the “Risk Factors” section.

Stamp Duty and Indirect Tax Risks

Hong Kong stamp duty, under the Stamp Duty Ordinance (Cap. 117), applies to transfers of Hong Kong shares at a rate of 0.13% of the consideration (or market value, if higher) for both the buyer and the seller. For a restructuring involving Hong Kong-incorporated entities, the sponsor must verify that all stamp duty has been paid, and that the applicant has obtained a stamp duty certificate from the IRD. The PRC’s stamp duty on share transfers is 0.1% for A-share transfers and 0.05% for B-share transfers, and the sponsor must obtain the PRC tax bureau’s confirmation. For cross-border transfers, the sponsor must also consider the PRC’s Value-Added Tax (VAT) on the transfer of financial assets, which is levied at 6% under the PRC VAT Law (effective 1 January 2024).

Practical Steps for the Sponsor’s Tax Due Diligence Work Programme

Step 1: Identify All Restructuring Transactions

The sponsor must first map the entire restructuring timeline, typically covering the three years preceding the listing application. This includes:

All share issuances, transfers, and cancellations.
All asset transfers, including intellectual property, real estate, and business operations.
All changes in the corporate structure, including the incorporation of new entities in offshore jurisdictions (BVI, Cayman, Bermuda) and the deregistration of PRC domestic companies.
The sponsor should obtain the company’s statutory registers, board minutes, and shareholder resolutions for each transaction, and cross-reference these against the bank statements and share transfer records.

Step 2: Obtain and Verify Tax Clearance Certificates

For each jurisdiction involved, the sponsor must obtain a tax clearance certificate from the relevant tax authority. The SFC’s 2025 enforcement report cited a case where the sponsor relied on a PRC tax bureau’s clearance certificate that was issued for a different entity, leading to a HKD 3 million tax liability post-listing. The sponsor must:

Verify the certificate’s authenticity by checking the tax bureau’s stamp and the date of issue.
Ensure that the certificate covers all taxes applicable to the restructuring, including EIT, VAT, stamp duty, and any local surcharges.
For Hong Kong entities, obtain a letter of no objection from the IRD under section 6 of the Inland Revenue Ordinance.
For BVI and Cayman entities, obtain a certificate of good standing from the Registrar of Companies, confirming that no tax liabilities are outstanding.

Step 3: Engage Independent Tax Counsel

Paragraph 5.1 of the Code of Conduct requires the sponsor to exercise independent judgment. This means that the sponsor cannot rely solely on the applicant’s in-house tax advisor or the applicant’s chosen external counsel. The sponsor must engage its own independent tax counsel—whether a Hong Kong law firm with a tax practice, a PRC tax firm, or an offshore legal advisor—to review the restructuring and issue a written tax opinion. The opinion must:

Identify each transaction and its tax treatment.
Confirm that all taxes have been paid or that a valid exemption applies.
State the legal basis for the tax treatment, with specific references to the applicable tax laws, regulations, and treaties.
The sponsor must then file this opinion with the HKEX as part of the listing application under Rule 3A.02(2).

Step 4: Document the Due Diligence Process

The SFC expects the sponsor to maintain a comprehensive due diligence file that documents every step of the tax verification process. This file should include:

A checklist of all restructuring transactions, with the status of tax clearance for each.
Copies of all tax clearance certificates, share transfer agreements, and valuation reports.
The independent tax counsel’s opinion.
A memorandum from the sponsor’s compliance officer confirming that the due diligence is complete and that no material tax risks remain.
The file must be retained for at least seven years after the listing, as required by paragraph 10.1 of the Code of Conduct.

Enforcement Trends and Case Studies

In SFC v. Sponsor B (2025), the SFC fined the sponsoring firm HKD 8 million and the licensed sponsor individual HKD 1.5 million for failing to verify the PRC EIT treatment of a share transfer in a historical restructuring. The applicant, a PRC technology company, had restructured from a domestic company to a Cayman-listed entity by transferring its equity interests to a BVI holding company. The sponsor relied on a PRC tax advisor’s opinion that the transfer was exempt from EIT under the PRC-Hong Kong Double Taxation Arrangement, but the SFC found that the exemption did not apply because the transfer was structured as a circular transaction that did not meet the “beneficial ownership” requirement. The SFC’s decision stated that the sponsor should have verified the beneficial ownership of the BVI entity by obtaining the entity’s statutory registers and bank statements, which would have revealed that the BVI entity was a shell company with no substance.

HKEX Listing Decision LD-2025-03: Refusal Due to Inadequate Tax Due Diligence

The HKEX’s Listing Decision LD-2025-03 refused a listing application from a PRC manufacturing company because the sponsor failed to obtain tax clearance certificates for two material asset transfers that occurred during the restructuring. The transfers involved the sale of a factory and a piece of land, and the sponsor relied on the applicant’s representation that the tax was paid. The HKEX found that the sponsor did not obtain the PRC tax bureau’s clearance certificate, and the applicant later disclosed that the tax was not paid, resulting in a HKD 12 million liability. The HKEX cited Rule 3A.02 and Practice Note 21, paragraph 4.3A, and stated that the sponsor’s failure to independently verify the tax clearance constituted a material deficiency in the due diligence process.

Engage independent tax counsel for every historical restructuring transaction, regardless of the applicant’s representation, and file the written opinion with the HKEX under Rule 3A.02(2).
Obtain and verify tax clearance certificates from the relevant tax authority for each jurisdiction involved, cross-referencing the certificate’s details against the underlying transaction documents.
Document the entire due diligence process in a compliance file that includes a transaction checklist, copies of all certificates and agreements, and a compliance officer’s memorandum, retaining the file for seven years.
Verify the beneficial ownership of any offshore entity involved in the restructuring, particularly for BVI or Cayman entities, by obtaining statutory registers and bank statements to ensure the entity has substance.
Disclose any material deferred tax liability arising from asset revaluations in the prospectus under the “Risk Factors” section, and ensure the provision is consistent with HKFRS or IFRS requirements under Listing Rule 4.10.