The Dutch Parliament is moving to overhaul its wealth tax regime, targeting a 2028 implementation that would force crypto investors to pay levies on “paper gains” before cashing out.
The Netherlands is effectively ending the era of tax-deferred compounding for digital asset holders. Under a new legislative proposal known as Wet werkelijk rendement Box 3 (Actual Return Tax Act), the Dutch government intends to levy a flat 36% tax on the annual value increase of investment portfolios, realized or not, starting January 1, 2028.
This shift marks a departure from the current “fictitious return” model, where taxes are calculated based on assumed yields rather than actual performance. While the proposal aims to comply with a Supreme Court (Hoge Raad) ruling that deemed the old system unlawful, the pivot to taxing unrealized gains introduces acute liquidity risks for volatile assets like Bitcoin.
The Mechanism: Mark-to-Market Taxation
The core of the proposal is a capital growth tax model similar to mark-to-market accounting. The Dutch Tax Authority (Belastingdienst) will assess the value of an investor’s holdings on January 1 and December 31. The difference, if positive, is taxed at 36%, regardless of whether the investor sold a single satoshi.
“Investors could owe tax if their portfolio rises in value, even if they did not sell anything and did not receive cash from their holdings.”
For a crypto investor holding 1 BTC that rallies from €50,000 to €100,000 in a calendar year, the tax liability would be roughly €18,000. If the investor lacks the cash liquidity to cover this bill, they would be forced to sell a portion of the asset, potentially triggering taxable events in a cascading loop.
Institutional Context: The Volatility Trap
While the bill allows losses to be carried forward to offset future gains, it does not solve the timing mismatch inherent in crypto markets. If an asset appreciates 200% in Year 1 (triggering a massive tax bill) and crashes 80% in January of Year 2, the investor is left with a tax obligation based on a valuation that no longer exists. This “paper wealth” trap is the primary driver behind fears of capital flight, as high-net-worth individuals may seek tax residency in jurisdictions with realization-based systems before the 2028 deadline.
The proposal is currently debated in the House of Representatives, with a deadline for enactment set for early 2026 to allow tax authorities sufficient lead time for IT systems upgrades.
