Dutch Bitcoin holders are staring down a tax overhaul that could put unrealized crypto gains on the tax bill from Jan. 1, 2028. The framework, known as the Actual Return Box 3 Act, would replace the Netherlands’ current wealth-tax system with one based on actual investment returns, including changes in the value of assets. For cryptocurrency, that means a year of Bitcoin price appreciation could generate a tax liability even if the investor never sells a single satoshi.
The House of Representatives approved the bill on Feb. 12 and sent it to the Senate, where it has been debated but not yet put to a final vote. Cryptocurrencies such as Bitcoin generally fall under Box 3, the category covering savings and investment assets held by Dutch taxpayers, and parliamentary documents have explicitly identified crypto as Box 3 assets that taxpayers are required to declare.
How the Capital Growth Tax Would Work
Under the House-approved bill, most assets would be subject to a capital growth tax, known in Dutch as a vermogensaanwasbelasting. The system takes both income generated by an asset and changes in its value into account when determining the taxpayer’s actual return. The valuation works by comparing asset values at different points in the tax year, so an investor who holds Bitcoin through the entire year would see its price movement folded directly into the calculation.
Losses receive mirrored treatment. The government says decreases in asset values can be offset against gains in later years, allowing negative returns to be carried forward. Interest, dividends and other direct income would form another component of the return, while certain expenses connected to generating investment income could be deducted.
The legislation does carve out an exception, but crypto is not in it. Real estate and shares in qualifying startups and scale-ups would generally be taxed only when a gain or loss is realized, such as at sale, an approach the government says avoids collecting tax before the taxpayer has actually received money from disposing of an illiquid asset. Crypto was not included in that exception under the House-passed bill, which is a pointed distinction for an asset class whose prices routinely swing by double-digit percentages within a single year. During parliamentary discussions, Dutch officials acknowledged that someone invested only in crypto could record a large return in one year and a substantial loss in the next, with the tax bill following those swings in real time.
A Competing Proposal Emerged Days Ago
The Box 3 bill working through the Senate is no longer the only document shaping the outcome. In a Sept. 29 letter to parliament, Prime Minister Rob Jetten, Finance Minister Eelco Heinen and State Secretary for Finance Eugène Eerenberg proposed expanding capital gains taxation to financial instruments from 2028. Assets falling into that category would generally be taxed when gains are realized rather than being taxed each year on paper appreciation.
That sounds like a reprieve, but there is a catch, and it is the catch that matters most for crypto holders. Direct cryptocurrency holdings do not generally fall within the same legal category as conventional financial instruments such as shares, bonds and options. Under the current direction of the plan, crypto would remain exposed to the capital growth method during the first stage of the new Box 3 system, meaning annual taxation of unrealized value changes while stock and bond investors shift toward realization-based taxation.
The government does plan to move the remaining Box 3 assets, crypto among them, toward a capital gains system in a later stage, which would eventually replace the annual unrealized-value tax with taxation at sale. The timeline for that second stage is not yet fixed, leaving Dutch crypto holders in the unenviable position of knowing the destination but not the arrival time.
Why This Matters Beyond the Netherlands
The Dutch debate is being watched closely far outside the country for two reasons. First, the Box 3 reform is one of the most advanced attempts by any major economy to build taxation of unrealized investment gains into ordinary annual income tax, rather than through estate or wealth levies. If crypto is taxed on paper gains annually in a founding EU member state from 2028, it creates a template other finance ministries can copy, and a compliance headache for Dutch residents holding volatile assets.
Second, the treatment exposes a definitional gap at the heart of crypto tax policy worldwide. The same Sept. 29 letter that promises realization-based taxation for financial instruments leaves crypto in the annual-mark-to-market lane, effectively because it is legally classified as neither instrument nor the exempted illiquid category. An asset that behaves like a high-volatility investment gets taxed as if it were a bank balance with a growth number attached.
There is also a practical dimension worth flagging. Taxing unrealized gains on an asset that can drop 70 percent in a subsequent year forces either sophisticated loss-carryforward mechanics or periodic liquidity crises, where investors must sell appreciated assets simply to pay the tax on appreciation they have not banked. The Dutch bill’s carry-forward provision addresses the first problem on paper, but the second is structural: annual tax on paper gains converts volatility directly into cash-flow risk.
What Happens Next
Three moving parts determine the outcome for Dutch crypto holders. The Senate must still vote on the House-approved Box 3 bill, and amendments are possible. The government’s Sept. 29 proposal to expand realization-based taxation needs to be worked into legislation, and its category boundaries could yet be redrawn to include direct crypto holdings. And the second-stage migration of remaining Box 3 assets to a capital gains system has no firm date, which means the gap between how shares and coins are taxed could persist for years after the 2028 start.
For now, the default trajectory for the Netherlands is clear and unusual in Europe: from 2028, Bitcoin held through a rising year is taxable income in that year, sale or no sale. Dutch holders watching the Senate calendar may want to note that the current system, whatever its flaws, at least waits until the gain is real.
Price snapshot at publication (Binance, 17:01 UTC, Oct. 1, 2026): BTC 84,226 USD, ETH 2,682.50 USD, SOL 117.25 USD.
taxing unrealized btc gains while exempting real estate because it is illiquid is wild. force me to sell sats just to pay the bill, thanks
my exit plan is now literally sell sats to pay the tax on sats. actual dystopian stuff lol
^ exactly. and the jan 2028 start just gives everyone two years to decide whether to move or move their coins
Taxing unrealized Bitcoin gains from 2028 while startups get the realization exception. They wrote a carve-out for illiquid assets and then excluded the most illiquid thing retail actually holds.
The startup carve-out keeps bothering me too. Illiquid equity gets a realization event, a BTC stack you cannot pay a grocery bill with does not. Senate has two years to fix this.
At least losses offset now. Under the old Box 3 fictional-return system you paid tax in down years on gains that never existed.
carry forward on losses is fine but the whole vermogensaanwasbelasting still taxes paper gains you cannot spend. senate please do something
Every valuation date becomes a spike-risk day now. Expect December liquidity events that have nothing to do with markets and everything to do with the tax calendar.
Comparing asset values at two fixed points means a December spike creates a bill even if you sell in January at half the price. Timing will become a whole sport here.