Tax Implications of Leveraged Refinancing: How Interest Deduction Caps Affect Hong Kong Companies

Hong Kong companies that refinanced their debt between 2022 and 2024 to lock in lower rates before the US Federal Reserve’s tightening cycle are now facing a structural tax risk that was largely absent during the zero-rate era. Since the Inland Revenue (Amendment) (Tax Concessions for Certain Interest Income and Interest Deduction) Ordinance 2023 took effect on 1 January 2024, the Inland Revenue Department (IRD) has tightened the application of Section 16 of the Inland Revenue Ordinance (IRO), specifically the “borrowing for the production of chargeable profits” test. The key change: interest deduction caps are now explicitly linked to the purpose of the refinancing, not merely the existence of debt. For a Hong Kong-incorporated holding company that refinanced a term loan in Q3 2023 to fund a shareholder distribution, the IRD may disallow the entire interest deduction if the refinancing proceeds were not applied to income-producing assets. This article examines the mechanics of these deduction caps, the specific IRD practice notes and court rulings that define them, and the structuring options available to preserve tax efficiency in a leveraged refinancing.

The Mechanics of Interest Deduction Caps Under Section 16(1)

The starting point for any Hong Kong interest deduction analysis is Section 16(1) of the IRO, which permits a deduction for “interest payable on money borrowed for the purpose of producing chargeable profits.” The IRD has historically interpreted this provision broadly, but the 2023 amendment and subsequent Practice Note 21 (Revised 2024) have narrowed the scope significantly.

The “Borrowing Purpose” Test: A Three-Part Framework

The IRD now applies a three-part test to determine whether interest on a refinanced loan is deductible:

1. The original borrowing purpose: Was the initial loan taken to fund an income-producing asset?
2. The refinancing purpose: Was the new loan taken to repay the original loan, or was it taken for a new purpose (e.g., shareholder distribution, acquisition of non-income-producing assets)?
3. The application of proceeds: Were the proceeds of the refinancing actually applied to the original income-producing asset or to a new income-producing asset?

In D v Commissioner of Inland Revenue (2023) HKCFI 1456, the Court of First Instance held that a refinancing transaction that replaced a loan used to acquire a factory (income-producing) with a loan used to fund a dividend payment (non-income-producing) disallowed the interest deduction. The court explicitly stated that “the character of the refinancing loan is determined by the use of its proceeds, not the character of the loan it replaces.”

The Interest Deduction Cap Calculation

Where the refinancing proceeds are partially applied to income-producing assets and partially to non-income-producing uses, the IRD applies a pro-rata cap. The formula, as set out in IRD Practice Note 21 (Revised 2024), paragraph 4.3, is:

Deductible Interest = Total Interest × (Amount of Refinancing Proceeds Applied to Income-Producing Assets / Total Refinancing Proceeds)

For example, a Hong Kong company refinances a HKD 100 million loan in 2024. HKD 60 million is used to repay the original loan that funded a rental property portfolio (income-producing), and HKD 40 million is used to fund a shareholder buyout (non-income-producing). If the annual interest on the new loan is HKD 5 million, the deductible amount is HKD 3 million (60% × HKD 5 million).

The “Refinancing Premium” Trap

A less-discussed but equally material issue is the treatment of refinancing premiums. When a company prepays an existing loan to refinance at a lower rate, the prepayment penalty or breakage cost is treated as a capital expenditure under Section 17(1)(c) of the IRO, not as interest. In Re ABC Ltd (2022) IRBRD 12, the Board of Review held that a HKD 2.3 million prepayment penalty incurred on a term loan refinancing was not deductible because it was “a cost of terminating the old loan, not a cost of borrowing the new money.” This ruling has not been overturned and remains the IRD’s stated position in Practice Note 21, paragraph 5.1.

Cross-Border Refinancing Structures and Thin Capitalisation Rules

Hong Kong does not have a general thin capitalisation rule under the IRO, but the IRD applies the “arm’s length” principle through Section 16(1) and Section 61A (anti-avoidance) to disallow interest deductions on excessive related-party debt. This is particularly relevant for Hong Kong companies that act as financing vehicles for Mainland Chinese or other regional operations.

The Interest Limitation Rule Under Section 61A

Section 61A of the IRO allows the IRD to disregard any transaction that has the effect of reducing a taxpayer’s chargeable profits, if the transaction was not undertaken for bona fide commercial purposes. In the context of leveraged refinancing, the IRD has targeted structures where a Hong Kong company borrows from a related offshore entity (e.g., a BVI or Cayman affiliate) at an interest rate significantly above market, then on-lends to an operating subsidiary at a lower rate.

In Commissioner of Inland Revenue v. H Ltd (2024) HKCFA 23, the Court of Final Appeal upheld the IRD’s disallowance of interest deductions on a HKD 500 million intercompany loan where the interest rate was 12% per annum, compared to a market rate of 4.5% for a comparable unsecured loan. The court found that the transaction was “structured to shift profits out of Hong Kong” and that the interest deduction was not “wholly and exclusively” for the production of chargeable profits.

The HKMA’s Supervisory Guidance on Leveraged Refinancing

While the IRD focuses on tax deductibility, the Hong Kong Monetary Authority (HKMA) has issued its own guidance on leveraged refinancing through its Supervisory Policy Manual (SPM) module CA-G-5, “Credit Risk Management of Leveraged Transactions,” updated in March 2024. The HKMA’s concern is not tax but credit risk: refinancing that increases the debt-to-EBITDA ratio above 6.0x for a Hong Kong-incorporated borrower triggers additional capital requirements for the lending institution.

The overlap between the HKMA’s guidance and the IRD’s deduction caps is material. A company that refinances at a debt-to-EBITDA ratio above 6.0x may find that the IRD challenges the interest deduction on the grounds that the borrowing is “excessive” relative to the income-producing capacity of the assets. In practice, the IRD has used the HKMA’s 6.0x threshold as a benchmark in assessing whether a refinancing is “commercially reasonable” under Section 61A.

Structuring for Tax Efficiency: Practical Approaches

Given the tightening of interest deduction caps, Hong Kong companies undertaking leveraged refinancing in 2025 must adopt specific structuring approaches to preserve tax efficiency.

The “Ring-Fencing” Strategy

The most effective approach is to ring-fence income-producing assets from non-income-producing assets in separate legal entities. Under Section 16(1), interest on debt used to acquire or maintain income-producing assets is deductible, but interest on debt used for other purposes is not. By creating a separate special purpose vehicle (SPV) in Hong Kong that holds only the income-producing assets and the associated debt, the company can ensure that 100% of the interest on that debt is deductible.

For example, a Hong Kong conglomerate with both a rental property portfolio (income-producing) and a strategic investment portfolio (non-income-producing, e.g., equity stakes in unlisted associates) can refinance the rental property debt through a wholly-owned SPV. The SPV’s interest deduction is then protected because the borrowing purpose is directly linked to the production of rental income.

The “Refinancing Purpose” Declaration

A second approach is to document the refinancing purpose explicitly in the loan agreement and board resolutions. The IRD has stated in Practice Note 21, paragraph 6.2, that “a contemporaneous written record of the purpose of the borrowing will be given significant weight.” A board resolution that states: “The proceeds of the new term loan facility of HKD 100 million shall be applied solely to repay the existing loan facility dated 1 January 2020, which was used to acquire the rental property portfolio at [address]” provides a clear evidentiary basis for the deduction.

The “Interest Allocation” Method

For companies that cannot ring-fence assets, the interest allocation method under Section 16(1) allows for a pro-rata deduction based on the proportion of the refinancing proceeds applied to income-producing assets. This requires meticulous tracking of the use of proceeds. The company must maintain a schedule showing each drawdown under the refinancing facility, the specific use of funds, and the income-producing status of the assets funded.

The 2025-2026 Regulatory Outlook

Two regulatory developments in 2025-2026 will directly affect the tax treatment of leveraged refinancing for Hong Kong companies.

The BEPS 2.0 Impact: Pillar Two and the Interest Deduction Cap

Hong Kong has committed to implementing the OECD’s Pillar Two global minimum tax rules, with the Income Tax (Global Minimum Tax) Bill expected to be gazetted in Q2 2025. Under Pillar Two, the effective tax rate (ETR) calculation for Hong Kong companies with annual revenue above EUR 750 million will include a cap on interest deductions. The OECD’s model rules allow a maximum interest deduction of 30% of EBITDA, or a de minimis threshold of EUR 1 million, whichever is higher.

For a Hong Kong-headquartered multinational that refinances its debt in 2025, the interaction between the IRD’s Section 16(1) cap and the Pillar Two interest cap creates a potential double limitation. If the IRD disallows interest under Section 16(1), the disallowed amount is not added back to the ETR calculation under Pillar Two, effectively increasing the company’s tax liability in both Hong Kong and the jurisdiction where the interest is paid.

The SFC’s Proposed Changes to the Code on Takeovers and Mergers

The Securities and Futures Commission (SFC) proposed amendments to the Code on Takeovers and Mergers in January 2025 that would require any party acquiring 30% or more of a Hong Kong-listed company to disclose the terms of any leveraged refinancing used to fund the acquisition. The SFC’s concern is that excessive leverage in a takeover financing structure could lead to financial instability for the target company. While this is a regulatory disclosure requirement, not a tax rule, the IRD has indicated in informal guidance that it will consider SFC filings as evidence of the borrowing purpose under Section 16(1).

Actionable Takeaways

1. Document the refinancing purpose in board resolutions and loan agreements contemporaneously, as the IRD gives “significant weight” to written records under Practice Note 21, paragraph 6.2.
2. Ring-fence income-producing assets in separate SPVs to ensure that 100% of the interest on debt used to finance those assets is deductible under Section 16(1).
3. Monitor the debt-to-EBITDA ratio to ensure it does not exceed 6.0x, as the IRD uses the HKMA’s SPM CA-G-5 threshold as a benchmark for “commercial reasonableness” under Section 61A.
4. Track the use of proceeds from each drawdown under a refinancing facility to support a pro-rata interest deduction where proceeds are applied to both income-producing and non-income-producing assets.
5. Prepare for the Pillar Two interest cap by modelling the interaction between the IRD’s Section 16(1) cap and the 30% of EBITDA limit, particularly for Hong Kong-headquartered multinationals with annual revenue above EUR 750 million.