The box 3 tax changes: what they are and what they mean for you

The Dutch government has proposed a major overhaul of its "box 3" asset tax system after years of controversy. The current system, which dates back to 2021, imposed income tax on assets and savings based on a fictional rate of return, even when markets experienced losses. This created an unfair scenario where investors paid tax on unrealised gains, while those holding money in savings accounts – which deliver lower returns – faced higher taxes.

The Supreme Court ruled this system conflicted with European human rights law and unfairly penalised those who chose to save rather than invest. The government initially planned to revert to calculating actual capital gains on unrealised gains, but now it's shifting to a realised gains system where investors only pay tax when they sell their assets. This change, however, will delay tax payments and cost the treasury around €15 billion up to 2035.

While many financial experts welcome the reversal of unrealised gains tax, the new proposal includes a reduction in the tax-free allowance from €30,846 to €1,000, which will disproportionately affect small savers and investors. Critics argue this measure is regressive and unfair, particularly as wealth taxes are gaining popularity in other parts of Europe. The government's decision to implement these changes quickly, without fully exploring more progressive tax strategies or increasing corporate taxes, has drawn criticism.