Hong Kong taxes only profits sourced in Hong Kong. That single line of the Inland Revenue Ordinance has kept tax bills low for decades of HK businesses — and also produced some of the most drawn-out disputes between founders and the IRD. The offshore profits tax claim is the mechanism that turns the idea into money saved, and it is one of the most misunderstood corners of HK tax.
This guide explains how the offshore claim actually works in 2026, what the FSIE regime changed for group structures, the documentation the IRD expects to see, and the common reasons claims are partially or fully rejected. It is aimed at SME founders and finance leads who suspect part of their profit may be offshore-sourced but want to understand the process before filing.
What the offshore claim actually is
Hong Kong operates a territorial source principle: only profits arising in or derived from Hong Kong are taxable. Profits from business activities conducted entirely outside HK are outside the scope of profits tax, regardless of where the company is incorporated or where its bank account sits.
An “offshore profits tax claim” is not a separate application. You make it on your annual profits tax return (BIR51 for corporations, BIR52 for partnerships and sole proprietors) by identifying the amount of profit you assert is offshore-sourced, with supporting notes in the tax computation. The IRD then reviews the claim — either accepting it at first assessment, or more commonly, raising queries under Section 51(4)(a) asking for documentation. Decisions on a contested claim routinely take 18 to 36 months to finalise.
If the claim succeeds, the offshore portion falls outside profits tax entirely. If it partially succeeds, only the HK-sourced portion is taxed — and that portion still runs through the standard rate structure, including the two-tier regime for qualifying SMEs. For how the two-tier regime treats your HK-sourced profits, see our guide to two-tier profits tax in Hong Kong.
The “operation test”: where the IRD actually looks
The core question the IRD asks is not where your customers are, not where your suppliers are, not where your money is banked, and not where your contracts are billed from. It is this: where did the activities that generated the profit actually take place? This is known as the operation test, refined over decades of Hong Kong case law.
What the IRD looks at depends on the type of income:
- Trading profits. Where contracts of purchase and contracts of sale were negotiated, concluded, and executed. If a HK-based employee arranged the deal, even remotely with overseas counterparties, it points to HK source.
- Service fees. Where the services were physically performed. A consultant who flies overseas to deliver work has a stronger offshore claim than one who zooms in from Central.
- Commissions. Where the agency activities (introducing parties, negotiating terms) took place.
- Interest and investment income. Where the money was made available to the borrower or where the securities were traded.
Some facts that do not help the claim as much as founders often think: customer addresses, supplier addresses, shipping documents showing goods never entered HK, currencies used, and the location of the paying bank. These can be relevant evidence but they do not, by themselves, establish offshore source.
FSIE regime (2023+): who it affects
In January 2023, Hong Kong introduced the Foreign-Sourced Income Exemption (FSIE) regime, and expanded it to cover disposal gains on assets from January 2024. This was a major tightening of offshore treatment for a specific group of businesses and is frequently confused with the general offshore claim.
The FSIE regime applies to MNE entities — a HK entity that is part of a multinational enterprise group (broadly, a group with at least one entity or permanent establishment outside HK). If you are an MNE entity receiving the following types of passive offshore income in HK, the income is taxable in HK unless you meet the economic substance requirement or a participation exemption:
- Interest income received from outside HK.
- Dividends received from outside HK.
- Disposal gains on assets (including equity interests and, from 2024, other asset classes).
- Intellectual property income.
Pure HK-domestic SMEs — a founder running one HK trading company with no overseas group members — are generally outside the FSIE scope and continue to rely on the traditional operation test. But if you have a BVI or Cayman parent, a Singapore sister, or a mainland subsidiary, FSIE is probably in play and the claim analysis is materially different from pre-2023. This is one of the most common areas where DIY tax claims go wrong.
Documentation the IRD expects
An offshore claim is only as strong as the evidence behind it. Start assembling these before filing, not when the Section 51(4)(a) notice arrives:
- Contemporaneous contracts showing where negotiation, drafting, and signing took place.
- Travel records and meeting minutes evidencing the physical location of key decisions. Boarding passes, hotel receipts, and calendar entries all count.
- Employee records — who handled the work, where they were based, and what they did. Job descriptions and timesheets help.
- Email and correspondence trails showing the conduct of business, ideally with time zones visible.
- Bank records tracing inflows and outflows that support the commercial narrative.
- Transfer pricing documentation if related parties are involved.
IRD inspectors expect you to keep records for at least seven years, and for offshore claims the practical bar is higher because queries can arrive four or five years after the return was filed. If the documents have grown legs by then, the claim collapses regardless of its underlying merit.
How a claim actually gets processed
The typical timeline, for a straightforward claim with no prior dispute:
- Year 1: File BIR51 with the offshore portion disclosed in the tax computation and a short covering note explaining the basis.
- Year 1–2: Either the claim is accepted at first assessment (rare for first-time claims) or the IRD issues a Section 51(4)(a) notice requesting documents, usually with a 30-day response window.
- Year 2–3: One or more rounds of written Q&A between your tax representative and the assessor.
- Year 3–4: Final assessment issued. If unfavourable, you have one month to object under Section 64, which kicks off the formal appeal path (Commissioner → Board of Review → courts).
A first-time offshore claim almost always gets queried. That is not a sign of weakness in your position; it is the IRD’s standard practice for a claim it has not yet validated. A clean set of responses the first time often leads to lighter scrutiny in later years.
Common reasons claims get rejected
- Key personnel based in HK. If directors, salespeople, or project managers are physically in HK, explaining why the profit-producing activity happened elsewhere is difficult.
- Back-to-back trading with trivial overseas activity. An “overseas” subsidiary that does nothing but receive and reissue invoices rarely survives scrutiny.
- Documentation inconsistent with the accounts. Claim narrative says Singapore; travel records show no Singapore visits; something has to give.
- Missing or late responses to IRD queries. Silence is treated as acquiescence in HK tax practice. Deadlines are not flexible.
- Conflating FSIE and traditional offshore. Treating MNE passive income as if the old rules still apply will fail post-2023.
Plan, do not retrofit
The businesses that win offshore claims almost always structured for it from the start — hiring overseas, negotiating overseas, documenting as they went. Retrofitting an offshore story onto a company that has always operated in HK rarely holds up, and the cost of a failed claim (back-taxes, interest, penalties, and the professional fees to defend) comfortably exceeds the tax saved by a successful one.
If you are thinking about an offshore claim, the conversation to have is before the year-end, not at filing time. For the wider context, our guide to Hong Kong profits tax for SMEs covers the baseline that any offshore claim sits on top of.
Talk to us before you file
Giga Accounting by 凌峰會計 helps HK SMEs assess whether an offshore claim is worth pursuing, prepare the contemporaneous documentation an IRD inspector will actually accept, and respond to Section 51(4)(a) queries without escalating the dispute unnecessarily.
For a full compliance setup that keeps your offshore position defensible year after year, see our bookkeeping and accounting services or our auditing services.
