Netherlands Unrealized Gains Tax: 36% Levy Stalls in Senate

The Netherlands unrealized gains tax is the boldest wealth grab Europe has seen in years, and it is now wobbling. In February 2026 Dutch lawmakers voted to tax paper profits on stocks, bonds and crypto at a flat 36%, even when nobody sold a thing. Six months on, the government that has to push it through the Senate is quietly trying to gut its own bill.

THE HAGUE, Netherlands, 11 August 2026

For anyone with a serious portfolio inside Dutch borders, this is the wake-up call. A tax on gains you have not banked is a tax on air.

What is the Netherlands unrealized gains tax?

The Netherlands unrealized gains tax is a flat 36% levy on the actual return from savings and investments held in Box 3, including the yearly increase in value of listed shares, bonds and cryptocurrency, whether or not the asset is sold. If a portfolio rises by 10,000 euros on paper in a year, the holder owes 3,600 euros, even with zero sales. The measure is scheduled to start on 1 January 2028.

The formal name is the Box 3 Actual Return Act. It scraps the old system, where the tax office assumed a “fictitious” return and taxed that assumption, an approach Dutch courts had already gutted for taxing income people never earned. The fix swings the other way: it taxes gains before they are ever realized. Let’s be blunt, that is a strange definition of income.

One thing we see constantly in advisory work: clients assume a “paper” tax cannot really apply until they cash out. In the Netherlands, that assumption would cost them every April, whether the market gain is real or vanishes the next year.

Did the Dutch parliament actually pass the 36% tax on unrealized gains?

Yes, the lower house passed it, but the fight is not over. On 12 February 2026 the Tweede Kamer, the Dutch House of Representatives, approved the Box 3 Actual Return Act by 93 votes out of 150 seats. It still needs the Eerste Kamer, the Senate, before it becomes law, and that is exactly where the plan has stalled.

Here’s the kicker. The incoming government does not love its own bill. Finance Minister Eelco Heinen has signalled he wants to amend the regime because he fears the Senate will reject a tax on unrealized gains, and the coalition leans toward taxing only realized gains instead. So the timeline is shaky and the 36% headline rate is not yet carved in stone. For a wider look at the squeeze on mobile wealth, our guide on how to protect your money from the EU maps the pattern.

Why the Netherlands unrealized gains tax matters far beyond Dutch borders

Taxing wealth that has not moved is no longer a fringe idea. The Netherlands unrealized gains tax is the sharpest example of a Europe-wide reflex: raise the burden on capital, watch it leave, then bolt on exit taxes and asset registers to stop the outflow. In April 2026 the European Commission’s own tax directorate published a study on net wealth, capital and exit taxes, openly wrestling with the fact that the rich either restructure, move offshore, or simply leave. The numbers don’t lie.

Norway is the cautionary tale. After it tightened its wealth tax and exit tax, some of its richest residents relocated, most visibly to Switzerland. The tax chases the money, and the money moves faster. Smart tax residency planning is now about staying ahead of confiscatory rules before they bite, not shaving a few points.

Notice the pattern. Some fire when you leave, some fire every year you stay. Either way the state wants a cut of value you have not turned into cash. Our breakdown of the CRS 2.0 reporting expansion shows the visibility side tightening in parallel, and Colombia’s wealth tax grabs show the same instinct outside Europe.

How could investors respond to a tax on paper profits?

The main levers are residency, asset mix and structure. Moving tax residency out of a high-tax country removes exposure to its wealth and unrealized-gains rules, though exit taxes can bite on the way out. Shifting into realization-based assets like real estate softens a mark-to-market regime. And a well-built offshore structure adds a layer that domestic grabs and lawsuits struggle to reach.

None of this is exotic. A client who spent a decade building a Dutch equity portfolio was rattled less by the 36% number than by the thought of paying it in a year the market fell. That fear, not the headline, drives the first serious conversation. Real estate, a second residency and offshore trusts come up fast once people run their numbers, and low-tax options like Paraguay residency are one starting point.

Bottom line: the Netherlands unrealized gains tax may yet be softened, but the intent is not going anywhere. Governments that promised to tax income are now taxing value. For anyone building real wealth inside Europe, that ship has sailed on leaving your planning to chance. Read next: how to protect your money from the EU.