Box 3 2026 (Current) vs Box 3 2028 (Proposed)

The 2026 system (Box 3 huidige stelsel) taxes you based on a deemed or fictitious return—specifically 1.28% on bank savings and 6.00% on other investments—regardless of what your assets actually earned or lost during the year. This means you owe Box 3 tax even if your portfolio declined in value. The proposed 2028 system (Box 3 werkelijk rendement stelsel) taxes you based on your actual realized and unrealized returns, including interest, dividends, capital gains, and paper appreciation. Under the 2028 system, if your investments lost money or earned zero return, you would owe zero Box 3 tax. The fundamental shift is from taxation of fictional income to taxation of actual economic gains.

Under the proposed 2028 actual return system, unrealized capital gains on liquid assets like publicly traded stocks, ETFs, bonds, and cryptocurrencies are taxed annually at 36%, even if you have not sold the assets. This is known as vermogensaanwasbelasting (wealth appreciation tax). For example, if you bought €100,000 of VWRL ETF and it appreciated to €120,000 by December 31, you would owe 36% tax on the €20,000 paper gain (€7,200 tax), even though you have not sold any shares. This can create liquidity issues, as you must pay cash tax on gains you have not realized. For illiquid assets like private business stakes or real estate (excluding primary residence), the taxation is typically deferred until the asset is sold, at which point the actual realized gain is taxed.

Both systems now offer fairness for loss years, but through different mechanisms. Under the current 2026 deemed return system, while the default calculation would normally assess tax based on the 6.00% deemed return, you can invoke the Rebuttal Scheme (tegenbewijsregeling) introduced after the 2024 Christmas Ruling (Kerstarrest). By documenting your actual negative returns, you can declare your actual loss and owe €0 Box 3 tax for that year. However, this requires maintaining detailed records and filing additional documentation with the Belastingdienst. Under the proposed 2028 actual return system, if your investments generated a net negative return after accounting for losses, dividends, and interest, you would automatically owe €0 Box 3 tax with no special filing required, and you may be able to carry forward the loss to offset future gains. The 2028 system is simpler for loss years, as actual return calculation is the default rather than requiring a rebuttal filing.

The current 2026 deemed return system is generally better for high-performing portfolios. Under the deemed return system, your Box 3 tax is capped based on a 6.00% fictitious return, regardless of your actual gains. So if your €200,000 portfolio grew by 20% (€40,000 gain), you would only pay tax on the deemed €12,000 return (6% of €200,000), resulting in a €4,320 tax bill. Under the proposed 2028 actual return system, you would pay 36% tax on the full €40,000 actual gain (including unrealized appreciation), resulting in a €14,400 tax bill—more than triple the tax under the deemed system. This makes the 2028 system significantly more expensive for investors during bull markets or in high-growth portfolios.

Under the 2026 deemed return system, the tax-free allowance is €59,357 for single filers and €118,714 for fiscal partners (married or registered partners). This allowance is applied to your total Box 3 wealth balance on January 1. Under the proposed 2028 actual return system, the tax-free allowance shifts from a wealth-based threshold to a return-based threshold of €1,800 for single filers and €3,600 for fiscal partners. This means the first €1,800 (or €3,600) of actual returns (interest, dividends, capital gains) are tax-free, but any wealth above that threshold is taxed on its actual return. The lower absolute allowance under the 2028 system reflects the shift in tax base from total wealth to annual returns.

Under the 2026 transitional system (Overbruggingswetgeving), eligible Box 3 debts (such as investment loans, margin loans, or mortgages on non-primary residences) are assigned their own negative fictitious return rate of approximately 2.4% to 2.7% annually. This negative deemed return is subtracted from the positive deemed returns on your savings (1.28%) and investments (6.00%) to calculate your net taxable Box 3 return. For example, if you have €200,000 in investments (generating €12,000 deemed return at 6%) and €50,000 in eligible debt (generating approximately -€1,250 negative return at 2.5%), your net deemed return would be €10,750, and you would pay 36% tax on that amount (€3,870). Under the proposed 2028 actual return system, you can deduct the actual interest you paid on eligible debts from your actual returns. For example, if you earned €10,000 in investment returns but paid €2,000 in investment loan interest, you would only be taxed on €8,000 net return. The 2028 system is generally more favorable if you carry significant high-interest debt, as you get a full deduction for actual interest paid (which may be 4-6%) rather than just a 2.5% deemed negative return.

Yes. Under the proposed 2028 actual return system (Wet werkelijk rendement box 3), you must maintain detailed records of all income, gains, and losses related to your Box 3 assets. This includes: (1) all interest and dividends received; (2) all realized capital gains and losses from asset sales; (3) unrealized capital gains or losses on liquid assets at year-end; and (4) all interest paid on eligible Box 3 debts. However, contrary to earlier drafts, investment costs such as brokerage fees, custody fees, and tax advisory costs are NOT deductible under the final 2028 framework—the government decided to prohibit these deductions to keep the system administratively manageable. The only deductible expense is interest paid on eligible Box 3 debts. This is still a significant administrative burden compared to the current 2026 system, which only requires you to declare your total wealth balance on January 1. Many taxpayers will need to use specialized tax software or hire a tax advisor (belastingadviseur) to accurately calculate their actual Box 3 returns under the 2028 system.

The taxation of unrealized gains under the proposed 2028 system can create liquidity problems, especially for investors holding highly appreciated assets who have not sold anything to generate cash. If you cannot pay your Box 3 tax bill in full, the Belastingdienst (Dutch Tax Authority) offers several options: (1) you can request a payment plan (betalingsregeling) to spread the tax liability over multiple months; (2) you may be able to request a deferral (uitstel van betaling) if you can demonstrate financial hardship; or (3) in extreme cases, you may be able to petition for debt forgiveness (kwijtschelding), though this is rare for Box 3 tax. To avoid liquidity issues, investors may need to strategically sell a portion of their appreciated assets each year to generate cash for the tax bill, or hold a larger cash buffer to cover tax liabilities on paper gains.

As of July 2026, the proposed 2028 actual return system (Box 3 werkelijk rendement stelsel) has been approved by the Tweede Kamer (House of Representatives) and is awaiting final passage through the Eerste Kamer (Senate) and Royal Assent. The implementation date is currently scheduled for January 1, 2028, with tax year 2028 being the first year it would apply (filed in 2029). However, the details of the reform—including the exact calculation methodology for unrealized gains, the treatment of illiquid assets, and the final allowance thresholds—are still subject to amendment during the legislative process. Taxpayers should monitor updates from the Belastingdienst and consult with a tax advisor as the 2028 implementation date approaches.

The deemed return system was ruled to violate Article 1 Protocol 1 of the European Convention on Human Rights (ECHR) in the landmark 'Christmas Ruling' (Kerstarrest) of December 24, 2024. The ECHR held that taxing individuals on fictional income they did not actually receive—particularly when their investments lost value—constitutes an unfair and disproportionate deprivation of property. Following this ruling, the Dutch government introduced the Rebuttal Scheme (tegenbewijsregeling) for tax years 2025-2027, allowing taxpayers to declare their actual returns instead of deemed returns if their actual returns are lower. The government also committed to offering retroactive compensation (narekenrente) to affected taxpayers for past years (2017-2024) and transitioning to a full actual return system by 2028. The deemed return system with the Rebuttal Scheme remains in place for 2025-2027 as an interim measure while the government develops and implements the new actual return framework.

No. The box classification is determined by the nature of your assets, not by your choice. Box 3 applies to your savings and investments (sparen en beleggen) held in your personal name, including bank accounts, brokerage accounts, investment funds, bonds, cryptocurrencies, and second homes. You cannot voluntarily reclassify these assets into Box 1 or Box 2. Box 1 is reserved for employment income, pension income, and owner-occupied residence benefits, while Box 2 applies only if you own at least 5% of the shares in a private limited company (BV). However, you can reduce your Box 3 exposure by: (1) maximizing contributions to tax-advantaged accounts like Lijfrente (annuity pension) or company pension (pensioen); (2) holding investments through a BV structure if you qualify for Box 2 (consult a tax advisor first); or (3) relocating to a country without wealth or capital gains taxes (emigration has significant tax consequences and requires professional advice).

Under the proposed 2028 actual return system, all worldwide income and gains from your Box 3 assets are included in your taxable actual return, including dividends, interest, and capital gains from foreign stocks, bonds, bank accounts, and funds. If you paid foreign withholding tax on dividends or interest (for example, 15% US withholding tax on US stock dividends), you can typically claim a credit or deduction under Dutch-foreign tax treaties to avoid double taxation. The exact treatment depends on the applicable tax treaty between the Netherlands and the country where the income was earned. You will need to report foreign income on your annual tax return (aangifte inkomstenbelasting) and provide documentation of foreign taxes paid. The Belastingdienst has indicated that standardized brokerage statements from major platforms (such as Interactive Brokers, DeGiro, or Binck) should be sufficient for most taxpayers.

The proposed 2028 actual return system includes special rules for illiquid assets that cannot be easily valued or sold. For assets like private company stakes (not qualifying for Box 2), unlisted securities, private real estate (excluding primary residence), art, collectibles, and cryptocurrencies held in non-custodial wallets, the taxation of unrealized gains may be deferred until the asset is sold or otherwise realized. At that point, the cumulative actual gain would be taxed at 36%. The government has acknowledged the practical difficulty of annually valuing and taxing illiquid assets and is expected to publish detailed guidance (uitvoeringsbesluiten) on the treatment of various asset types before the 2028 implementation date. If you hold significant illiquid assets, consult a tax advisor to understand how they will be treated under the new system.

Yes. Under the proposed 2028 actual return system, your Box 3 taxable return is calculated on a net basis across all your Box 3 assets. This means that capital losses, interest expenses, and deductible costs can offset capital gains, interest income, and dividend income within the same tax year. For example, if you realized a €10,000 gain on ETF A and a €4,000 loss on Stock B, your net taxable return would be €6,000. Additionally, if your total Box 3 return for a given year is negative (i.e., you had net losses), you may be able to carry forward those losses to offset future years' gains, although the final rules on loss carryforward are still being finalized by the Belastingdienst as part of the legislative implementation process.

It depends on your total Box 3 wealth and expected returns. Under the current 2026-2027 deemed return system, your tax liability is based only on your wealth balance, not on whether you realize gains by selling. So selling or holding does not change your annual Box 3 tax during 2026-2027. However, under the 2028 actual return system, realized and unrealized gains are both taxed. If you hold highly appreciated assets as of January 1, 2028, you will owe tax on the unrealized appreciation at year-end even if you don't sell. Strategically, some taxpayers may consider realizing gains in 2027 (while still under the deemed system) if they believe their 2028 actual returns will far exceed the 6% deemed threshold. This is a complex decision that depends on your specific portfolio, wealth level, and future return expectations—consult a tax advisor for personalized guidance.