Hong Kong Startup Founder & Equity Tax — Expert Advisory

Yes. The gain realised when exercising employee stock options — calculated as (market value at exercise date - exercise price) × number of shares — is assessable as employment income under s.9(1)(a) of the IRO. This gain is subject to salaries tax at progressive rates up to 15%. No capital gains tax applies to gains after exercise (on subsequent sale of the acquired shares). Employer reporting on IR56B (stock option spread) and reporting to the IRD on share option gains is mandatory.

Hong Kong has no capital gains tax, so gains from selling shares in a startup (above any employment income element already assessed) are generally not taxable if they represent capital appreciation. The key condition is that the shares must not be held as part of a trading portfolio — a frequent trader of shares may have gains treated as profits tax. For founders holding shares for years and selling on exit, the gain is almost always capital and not taxable in HK.

This is complex and depends on how the founder shares were issued. If founder shares were issued at market value at the time of grant (common in early-stage where market value equals nominal value), there is no employment income element. If shares are issued at a discount to market value, the discount is assessable employment income. The vesting mechanism itself (right to sell or return restrictions lifting) may create a s.9(1)(a) event if the IRD views the vesting as an employment benefit arrangement. Specialist advice before setting up founder equity is strongly recommended.

For purely capital investment stakes, holding personally preserves the capital character of future sale proceeds (no CGT). For active involvement where equity is employment compensation, holding through a company provides limited protection. However, if the company earns dividends or capital distributions from the startup, these may be taxable profits of the holding company under the FSIE regime (for offshore-source passive income). Each founder's situation is different — get specialist advice before structuring equity.

Convertible notes are typically treated as debt instruments until conversion. Interest paid on the note is deductible to the company and assessable income to the investor. On conversion to equity (usually at a discount to the next funding round price), the discount may create taxable income to the investor equal to the difference between the conversion price and the then-market value. If the investor is an active angel investor (trades regularly), the conversion gain may be assessable as profits. For passive investors, it is more likely to be capital.