Hong Kong is studying an expansion of its asset management tax overhaul that could bring proprietary trading firms — Jane Street among them — into the scope of tax concessions currently reserved for funds, according to a report by finance.biggo.com.

The review targets the city's concessionary tax regime, which since 2019 has exempted qualifying onshore funds from profits tax on transactions in Hong Kong assets. That regime, introduced under the Inland Revenue (Amendment) (No. 3) Ordinance 2018 and effective from April 1, 2019, covers carried interest and fund-level gains but has consistently excluded proprietary capital deployed by trading houses trading for their own account rather than on behalf of investors.

The proposed extension would change that boundary. Firms structured as proprietary trading operations — market-making and arbitrage businesses that trade their own balance sheets — could gain access to tax treatment previously limited to entities meeting the Securities and Futures Commission's definition of a "fund" under the profits tax concession conditions.

For execution desks, the distinction matters structurally. Proprietary firms route their own flow, own their technology stack end to end, and allocate capital without external investor mandates. Their exclusion from the fund tax regime has been a standing friction point in Hong Kong's efforts to position itself against Singapore as a base for large-scale electronic trading operations. Jane Street, one of the largest global market makers by volume across US equities and ETFs, exemplifies the category of firm the expansion would target.

What is mandated versus what is proposed requires care here. Nothing has been enacted. The item under consideration is a policy study — an evaluation of whether to widen the eligibility criteria of the existing concession — not a draft bill, not a published amendment ordinance, and not a consultation paper with a fixed deadline. The source report does not specify a legislative timeline, an effective date, or a compliance framework.

The existing regime offers a benchmark for what an expanded version might look like. The 2019 rules apply a 0% profits tax rate on qualifying transactions for certified funds, subject to conditions: the fund must be managed by a licensed operator, transactions must fall within scheduled categories (shares, debentures, futures, foreign exchange, and certain qualifying income including dividends and interest income is exempt), and non-resident funds must not carry on business in Hong Kong beyond the scheduled activities. Whether proprietary firms would need to restructure into fund-like vehicles — with licensed managers and segregated investor accounts — or whether the regime would create a new eligibility class for own-account traders remains an open design question the report does not answer.

The tax arbitrage dimension is measurable. Hong Kong's standard profits tax rate stands at 16.5% for corporations. A proprietary trading firm currently booked in Hong Kong pays that rate on trading income. Under the fund concession, qualifying income faces zero. For a market maker generating revenue in the billions of dollars annually — Jane Street reported $20.5 billion in net trading revenue for 2024, according to previously disclosed figures — the difference between 16.5% and zero on Hong Kong-sourced trading profits is material enough to drive venue and booking-center decisions.

That is the competitive framing. Singapore has attracted substantial proprietary and quantitative trading activity through its own incentive structures, including the finance and treasury centre incentives administered by its Economic Development Board, which can reduce headline corporate rates to as low as 8% or 10% for qualifying activities. Hong Kong's fund concession at 0% is more aggressive than Singapore's trading incentives on paper, but only for entities that qualify as funds. Extending eligibility to proprietary houses would close that definitional gap.

For sell-side desks and vendors servicing prop firms in the region, the policy signal affects technology and connectivity planning. Firms that have kept their Asia-Pacific booking and risk infrastructure in Singapore or maintained London- or Amsterdam-centered operations may reassess Hong Kong as a primary base if the tax treatment aligns with the fund regime. Colocation, market data licensing and clearing arrangements at HKEX-listed venues would follow the booking decision, not precede it.

The report does not state which government body leads the review — whether the Financial Services and the Treasury Bureau, the Inland Revenue Department, or a broader policy coordination process — nor whether the SFC would need to amend its licensing framework to accommodate a new class of concession claimants. Under current rules, proprietary trading with a firm's own capital generally falls outside the SFC's licensing requirement for asset management, meaning an expanded tax regime would need either a new certification pathway or a modified supervisory perimeter.

Market participants should also separate what is asserted from what is demonstrated. The claim that the expansion would attract firms like Jane Street rests on the assumption that tax treatment is a binding constraint on booking-center choice. Staffing pools, latency infrastructure, legal enforceability of close-out netting, and access to mainland China markets via Stock Connect all factor into that decision alongside tax. Hong Kong already offers the connectivity advantages; the tax regime is one input among several.

The absence of a timeline is the practical takeaway for compliance and tax planning teams. No rule change is imminent, no re-booking trigger exists yet, and any amendment ordinance would require passage through Hong Kong's Legislative Council before taking effect, a process that under the 2018 precedent took roughly a year from proposal to enactment to commencement.

Watch for a formal consultation or LegCo brief as the next concrete milestone — that document, when it lands, will define the eligibility test, the transaction scope, and the effective date that desks can plan against.