Comparison of stamp duties between Hong Kong and Mainland China: Analysis of the impact of cross-border investment

As an investor navigating between Hong Kong and Mainland China markets, are you aware of the major changes in stamp duty regimes across both jurisdictions? Between 2023 and 2024, both markets consecutively cut securities transaction taxes, and Hong Kong fully lifted property cooling measures ("spicy measures"), bringing new opportunities and challenges to cross-border investment. A thorough understanding of these differences is a crucial step in optimizing your investment strategy and managing transaction costs.

Back to top

Stock Stamp Duty: Two Distinct Regimes

Hong Kong and Mainland China took different paths in reducing stock market transaction costs. While both lowered tax rates in the second half of 2023, the underlying tax philosophies and their impact on investor behavior differ significantly.

Hong Kong's "Bilateral Levy" Model

Effective November 17, 2023, Hong Kong reduced the stamp duty rate on stock transfers from 0.13% to 0.1%. Proposed in the 2023 Policy Address and passed by the Legislative Council, this adjustment restored the tax rate to its pre-August 2021 level.

Although this move is estimated to reduce government revenue by approximately HK$14.1 billion annually, it reflects Hong Kong's determination to maintain its status as one of the world's most competitive stock markets. This tax cut benefits all market participants, from retail to institutional investors.

Mainland China's "Unilateral Seller" Model

Mainland China, on the other hand, halved its securities transaction stamp duty effective August 28, 2023, marking the first reduction in 15 years. The Ministry of Finance and the State Taxation Administration lowered the rate from 0.1% to 0.05%, while maintaining the unilateral seller-only structure in place since September 2008.

This "seller-only" structure provides significant psychological and financial advantages for buyers, as they are not required to pay stamp duty when purchasing stocks. This move aims to invigorate the capital market and boost investor confidence, with major indices rising by more than 2% on the day of the announcement.

Back to top

Stock Connect: Clarifying Cross-Border Stamp Duty Rules

The Stock Connect mechanism creates unique cross-border trading channels, and investors must clearly understand which jurisdiction's stamp duty rules apply to their trades. The relevant regulations directly impact transaction costs and cannot be overlooked.

Northbound Trading (Hong Kong / Overseas Investors → Mainland A-Shares)

When Hong Kong and overseas investors trade securities listed on the Shanghai or Shenzhen Stock Exchanges via Stock Connect:

• Hong Kong Stamp Duty: Not applicable (under the Stamp Duty Ordinance, SSE and SZSE securities are not classified as "Hong Kong stock").
• Mainland Stamp Duty: Applies at 0.05% on sellers only (the same as for domestic Mainland investors).
• Effective Tax Rate: 0.05% when selling; 0% when buying.

Southbound Trading (Mainland Investors → Hong Kong Stocks)

When Mainland investors trade securities on the Hong Kong Stock Exchange through Stock Connect:

• Hong Kong Stamp Duty: Applicable, at a rate of 0.1% for both the buyer and the seller (under the Stamp Duty Ordinance, HKEX-listed securities fall under "Hong Kong stock").
• Mainland Stamp Duty: Not applicable.
• Effective Tax Rate: The total cost is 0.2% (0.1% for the buyer + 0.1% for the seller).

Back to top

Property Stamp Duty: Comprehensive Easing in the Hong Kong Market

Hong Kong implemented a thorough reform of property stamp duty in 2024, reshaping the residential property tax regime. Effective from February 28, 2024, the government abolished all demand-side management measures introduced over the past decade or more, creating one of the most open property markets in Asia.

Current Hong Kong Property Ad Valorem Stamp Duty (AVD) Rates

Hong Kong currently applies a single progressive tax scale (Scale 2 rates) across all residential property transactions, regardless of the buyer's residency status or the number of properties already owned:

This new system applies equally to all buyers—whether Hong Kong permanent or non-permanent residents, and regardless of how many properties they already hold. This reform aims to revitalize Hong Kong's property market and attract international investment.

Mainland China's "Dual-Tax" System

Mainland property transactions adopt a dual-tax system of deed tax plus stamp duty:

• Deed Tax: The tax rate ranges from 3% to 5% (determined by provincial governments) and is payable by the buyer.
• Property Stamp Duty: 0.05% for each of the buyer and seller, totaling 0.1%.
• Total Transaction Cost: Typically 3.1% to 5.1%.
• Recent Exemptions: Property transfers during corporate restructuring (mergers, divisions, liquidations) and intra-group transfers are exempt.

Back to top

Implications for Investment Strategies

For Equity Investors

The differences in stamp duty create distinct strategic advantages:

1. Northbound Trading Advantage: Hong Kong investors investing in A-shares via Stock Connect enjoy an ultra-low 0.05% seller-only tax rate, making it the most cost-effective route to gain A-share exposure.
2. Frequent Traders: The 23% reduction in total Hong Kong stamp duty costs (from 0.26% to 0.2%) benefits active traders, but Mainland China's 0.05% rate remains significantly more favorable for high-frequency trading strategies.
3. Long-Term Investors: Mainland China's seller-only unilateral structure is particularly advantageous for "buy-and-hold" investors, as they incur no stamp duty upon initial purchase.

For Property Investors

The easing of Hong Kong's property market has created unprecedented opportunities:

• Overseas Investors: The abolition of Buyer's Stamp Duty (BSD) removed the 15% additional tax on non-permanent residents, allowing all individuals to invest in Hong Kong property on an equal footing.
• Portfolio Flexibility: The abolition of Special Stamp Duty (SSD) means properties resold within the holding period are no longer subject to extra taxes, enabling investors to adjust their property portfolios with greater flexibility.
• Cost Comparison: Hong Kong's maximum rate of 4.25% holds an advantage over Mainland China's upper-limit combined rate of 5.1%, although Mainland exemption policies may lower its effective tax rate.
• Corporate Structures: Mainland China's exemptions for corporate restructurings create opportunities for investors holding properties through corporate entities.

Between 2023 and 2024, the stamp duty landscape in Hong Kong and Mainland China underwent fundamental transformations, opening up new opportunities for cross-border investors. The comprehensive easing of measures in Hong Kong's property market, coupled with reductions in stock transaction taxes across both jurisdictions, signifies that regional markets are moving toward greater competitiveness. By gaining a thorough understanding of these two distinct tax regimes and strategically utilizing mechanisms such as the Mutual Market Access schemes (Connect schemes), investors can optimize their cross-border portfolios across two of Asia's most dynamic markets while effectively controlling transaction costs.