Dutch Finance Minister Plans Significant Changes to Box 3 Tax System

By Patricia Miller

Feb 25, 2026

2 min read

Dutch Finance Minister Eelco Heinen signals a need to revise the Box 3 tax reform, aiming for changes by 2028 to how asset appreciation is taxed.

Dutch Finance Minister Eelco Heinen has revealed intentions to amend the proposed overhaul of the Box 3 tax system, acknowledging that advancing the legislation in its present state is not feasible. Conversations with the State Secretary are already underway as they plan to reassess the proposal with input from both the House and Senate. The forthcoming tax structure, aimed to be in place by 2028, intends to levy a 36% tax on asset appreciation, which would cover various forms of investments including savings, stocks, bonds, and digital assets.

What does this mean for investors? The new policy seeks to tax assets based on their market growth without requiring the actual realization of profits, meaning that even untapped gains would incur tax liabilities. This approach contrasts sharply with the current treatment of real estate and shares in startups, where taxes are generally applied at the point of sale, allowing for annual income such as rent or dividends to be taxed separately.

Despite approval from the House, the proposed changes have drawn significant scrutiny from the Senate and investment community, primarily centered on the risks of increased taxation and potential liquidity issues. Critics argue that taxing unrealized gains could compel investors to sell assets prematurely, leading to potential capital outflows from the market. Moreover, investors trading cryptocurrencies would face tax structures identical to traditional investment portfolios, which adds an additional layer of concern.

In light of these criticisms, Parliament has expedited the review timeline from five years to three, indicating a possible pivot towards a capital gains model. Under this model, taxes would be applied only when assets are sold, not when their value increases on paper.

This reform initiative was propelled into the spotlight after a Supreme Court decision in December 2021 invalidated the previous taxation framework. The court found that basing tax assessments on hypothetical earnings violated property rights, particularly during periods marked by persistently low interest rates.

As the situation evolves, retail investors should remain vigilant. Understanding these tax implications will be crucial as the legislative process unfolds, and adapting strategies may be necessary to navigate the changing regulatory landscape effectively.

Important Notice And Disclaimer

This article does not provide any financial advice and is not a recommendation to deal in any securities or product. Investments may fall in value and an investor may lose some or all of their investment. Past performance is not an indicator of future performance.