Dutch Startup Staff and Early Investors Face Tax Bill on Unsold Shares (2026)

A potential tax storm is brewing for Dutch startups and their employees, with a new tax system on the horizon that could have significant implications. The proposed Box 3 tax reform has sparked concern and alarm among the startup community, as it may force staff and early investors to pay taxes on shares they can't easily sell.

Set to take effect in 2028, this revised tax regime has been approved by the Tweede Kamer, as reported by FD. The legislation aims to overhaul how the Netherlands taxes income from savings and investments, known as Box 3. Here's where it gets controversial: the current system taxes individuals based on an assumed return, rather than their actual earnings. This approach was deemed unlawful by the Hoge Raad in 2021, prompting the government to redesign the tax system.

Under the current system, the Belastingdienst, the Dutch tax office, calculates a notional return for individuals, which forms the basis for taxation. However, startups argue that the proposed change creates acute problems for those holding equity in young, fast-growing companies. Many of these firms unexpectedly fall outside an exemption included in the bill, which means that staff and early investors could be liable for taxes on substantial increases in share value, even if those shares are illiquid.

This situation puts shareholders in a bind, potentially forcing them to pay taxes out of their personal savings or even take out loans to cover the bill. Employees, too, are expressing unease, as Michiel Muller, co-founder of online supermarket Picnic, explained to FD: "We have many international people who are asking what this means for them. That is entirely logical. The same thing happened when the 30 percent ruling for expats was going to be scaled back. People come here because we offer a whole package of conditions. It is problematic when several elements of that threaten to shift multiple times."

The potential impact of this tax reform is far-reaching and could significantly affect the Dutch startup ecosystem. It remains to be seen how this issue will be addressed and whether a solution can be found that balances the interests of the government, startups, and their employees. What are your thoughts on this proposed tax reform? Do you think it's fair, or does it present an unfair burden on certain groups? Feel free to share your opinions and engage in the discussion in the comments below!

Dutch Startup Staff and Early Investors Face Tax Bill on Unsold Shares (2026)
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