Box 3 Tax and Investing
in the Netherlands (2026)
Box 3 does not tax your actual gains — it taxes a deemed (fictitious) return the government assumes you earned on your wealth. Here is how it works, what it costs for a typical ETF investor, and the legal ways to reduce the bill.
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TL;DR
Box 3 is the Dutch wealth tax. It does not tax your actual investment gains — it taxes a deemed return the government assumes you earned on your assets. In 2026 the deemed return on bank savings is roughly 1.44% and on investments (ETFs, stocks, bonds) roughly 5.88%. That deemed income is taxed at 36%. You pay nothing on your first ~€57,684 of wealth (€115,368 for couples filing jointly). Dutch tax residents are taxed on worldwide assets — foreign brokers and foreign bank accounts count.
What is Box 3? The Dutch wealth tax explained
The Netherlands taxes income in three separate “boxes,” each with its own rate and rules. Box 3 is the one that affects your investment portfolio directly.
| Box | What it covers | Tax rate |
|---|---|---|
| Box 1 | Income from work and primary home | Progressive, up to 49.5% |
| Box 2 | Dividends / gains from a substantial shareholding (5%+ in a company) | 24.5% up to €67k, then 33% |
| Box 3 | Savings and investment wealth (vermogen) | 36% on deemed return |
Many countries tax the gains you actually realise when you sell. The Netherlands does not. Instead, it assumes you earn a fixed percentage on your wealth each year and taxes that assumption. In practice:
- You can pay Box 3 tax in a year when your portfolio fell 20%.
- You pay no extra tax if your portfolio doubled — beyond what the deemed return already captures.
- Long-term buy-and-hold investors who never sell still pay Box 3 every single year.
How the deemed return system works
Under the transitional system, Box 3 distinguishes three categories of assets — each with a different deemed return rate.
| Category | What it includes | 2026 deemed return |
|---|---|---|
| Bank savings | Current accounts, savings accounts, bank deposits | ~1.44% |
| Investments & other assets | ETFs, stocks, bonds, crypto, second homes, brokerage cash | ~5.88% |
| Debts | Consumer loans, second-home mortgages (Box 1 mortgage excluded). Note: a threshold (drempel) of ~€3,700 per person applies — only the amount above this threshold is deductible. | ~2.47% (reduces base) |
Your Box 3 wealth is assessed on a single date: 1 January. Only the assets you hold on that day count. This creates both planning opportunities and a structural incentive to pay attention to your year-end balance.
- Primary residence (taxed in Box 1)
- Pension assets (occupational + AOW)
- Lijfrente / annuity accounts (Box 1)
- Green investments up to €71,251/person
- Personal effects and cars for personal use
Step-by-step Box 3 calculation
A realistic scenario: single investor, €90,000 ETF portfolio and €15,000 in bank savings.
| Brokerage portfolio (ETFs, stocks) | €90,000 |
| Bank savings account | €15,000 |
| Total Box 3 assets | €105,000 |
| Heffingvrij vermogen (tax-free allowance) | − €57,684 |
| Taxable Box 3 base | €47,316 |
| Category | Actual balance | Share | Taxable portion |
|---|---|---|---|
| Bank savings | €15,000 | 14.3% | €6,766 |
| Investments | €90,000 | 85.7% | €40,550 |
| Category | Taxable portion | Deemed return | Deemed income |
|---|---|---|---|
| Bank savings | €6,766 | 1.44% | €97 |
| Investments | €40,550 | 5.88% | €2,384 |
| Total deemed income | €2,481 |
€2,481 × 36% = €893
This investor pays roughly €893 per year — regardless of whether their ETFs returned +15% or −10% during the year. Tax is paid as part of the annual aangifte inkomstenbelasting (deadline: 1 May for the prior calendar year).
What counts as an “investment” in Box 3?
The investment category carries the highest deemed return rate. The scope is broader than most investors expect.
| Asset type | Box 3 category | Notes |
|---|---|---|
| ETFs and index funds | Investments | All brokerage-held funds, UCITS or otherwise |
| Individual stocks | Investments | Unless you hold 5%+ in a company (→ Box 2) |
| Bonds | Investments | Corporate and government bonds |
| Cryptocurrency | Investments | Full market value on 1 Jan reported in aangifte |
| Investment property / second home | Investments | WOZ value minus outstanding mortgage |
| Brokerage cash balance | Investments | Cash at a broker (not a bank) = investment rate, not savings rate |
| Bank savings / current account | Bank savings | Lower deemed return rate (~1.44%) |
| VvE (Homeowners Association) share | Bank savings | Officially classified as bank balances — taxed at the lower savings rate |
| Notary third-party account (derdenrekening) | Bank savings | Money held by a notary (e.g. during a house purchase) qualifies at the savings rate |
| Certified green investments | Exempt up to €71,251 | Must be officially certified groene beleggingen |
How to reduce your Box 3 tax
Box 3 is a real cost of investing in the Netherlands. These are the main legal levers to minimise it.
Automatic but important: below ~€57,684 in total assets you pay zero Box 3 tax. Below the threshold, no optimisation is needed at all.
Married or registered partners can combine allowances (~€115,368 combined) and allocate assets between each other optimally. Zero-cost, high-impact.
Contributions to a lijfrente or banksparen account move assets out of Box 3 entirely and reduce your Box 1 income immediately. Drawdown is taxed in retirement — typically at a lower rate.
Certified groene beleggingen (e.g. Triodos, ASN) are exempt up to €71,251/person, plus a 0.7% tax credit. Trade-off: limited fund selection, generally higher fees. Important: the Dutch government is phasing out this exemption — it will be significantly reduced in 2027 and scrapped entirely in 2028. If you are using this strategy, factor in the sunset.
Brokerage cash is taxed at the ~5.88% investment rate. The same cash in a bank savings account is taxed at ~1.44%. On a €20,000 buffer, the difference is roughly €88/year in tax saved.
Large temporary inflows — bonus, property proceeds, inheritance — arriving in late December inflate your tax base for the full year. Timing them to January can help. Caution: the Belastingdienst has an anti-arbitrage rule. If you sell investments to park as savings on 1 January and then buy back within three months (between 1 October and 31 March), the tax office may disregard the transaction unless you can demonstrate a legitimate non-tax reason.
Some high-net-worth investors hold assets through a private investment company (beleggings-BV), which is taxed under corporate rules rather than Box 3. The administrative overhead is significant and the break-even portfolio size is generally considered to be well above €500,000. If this applies to you, the decision requires a Dutch belastingadviseur — this is not a DIY strategy.
Do foreign accounts and brokers count in Box 3?
Yes — all of them. Dutch tax residents are taxed on worldwide wealth, regardless of where the account is held or whether the broker operates in the Netherlands.
| Account / asset type | Box 3 category | Auto-reported to Belastingdienst? |
|---|---|---|
| DEGIRO (NL) portfolio | Investments | Usually yes |
| IBKR Ireland / IBKR Luxembourg | Investments | No — you must declare |
| Trading 212 (Bulgaria) | Investments | No — you must declare |
| Crypto (Binance, Kraken, Coinbase) | Investments | No — you must declare |
| Foreign bank account (EU or non-EU) | Bank savings | Varies — often no |
| Revolut / Wise balance | Bank savings | No — you must declare |
| Foreign second home / real estate | Investments | No — you must declare |
A second home abroad is reported in Box 3, but if the foreign country also taxes it (e.g. a Spanish property taxed in Spain), you can generally claim double tax relief (vrijstelling ter voorkoming van dubbele belasting). This reduces your Dutch Box 3 bill proportionally. A belastingadviseur is recommended for cross-border property situations.
Box 3 applies as long as you are a Dutch tax resident. Because the peildatum is 1 January, emigrating mid-year still means you owe Box 3 for that full tax year. Timing your departure to very early January removes one full year of liability. Tax treaties between the Netherlands and other countries rarely eliminate Box 3 — they are generally designed around income taxes, not wealth taxes.
Does the 30% ruling affect Box 3?
If you are an expat in the Netherlands with the 30% ruling, the interaction with Box 3 changed significantly in 2025.
Under the old system, 30% ruling holders could elect to be treated as a “partial non-resident taxpayer” for Box 2 and Box 3. The key benefit: certain foreign assets — primarily foreign-held investments and bank balances — could be excluded from the Dutch Box 3 taxable base. This was a significant advantage for expats with large pre-existing portfolios abroad.
The partial non-resident taxpayer option has been abolished for everyone who received the 30% ruling on or after 1 January 2024. From 2025 onwards, these individuals are taxed on their worldwide assets in Box 3 — the same as any Dutch tax resident.
Transitional rule: If your 30% ruling was granted before 1 January 2024, you can retain the partial non-resident status through the end of 2026 only. From 2027, the old benefit disappears entirely for everyone.
Can you use actual returns instead of the deemed return?
In limited circumstances, yes — but for most investors in 2026, the answer is no.
Following the Hoge Raad’s Kerstarrest ruling, taxpayers who received a Box 3 assessment under the old flat-rate system for the years 2017–2022 may be entitled to use their actual return if it was lower than what the flat rate assumed. The Belastingdienst ran a massaal bezwaar (collective objection) process for this. Check belastingdienst.nl to see if your assessment falls within the eligible group.
Under the transitional system currently in force, you cannot generally opt out of the deemed rates — they simply apply. The 2026 rates (savings ~1.44%, investments ~5.88%) are set by the government based on recent market averages. The tegenbewijsregeling (counter-evidence option) may expand in future, but for now the transitional rates are the floor you work from.
The future of Box 3: real-return system from 2028
The deemed return system is being phased out. The replacement is called the werkelijk rendement stelsel — a tax on actual returns.
- Deemed return on savings: ~1.44%
- Deemed return on investments: ~5.88%
- Tax rate: 36% on deemed income
- You can owe tax even when your portfolio fell
- Simple to administer — single annual snapshot
- Dividends and interest taxable as received
- Capital gains taxed on accrual basis each year
- Capital losses deductible (immediately or carried forward)
- No tax in years your portfolio declined
- More complex — requires annual portfolio tracking
The most contested aspect of the 2028 system is how capital gains will be taxed. The current proposal taxes gains on an accrual basis — meaning the unrealised increase in your ETF portfolio each year would be taxed as income, even if you did not sell a single share. Critics argue this is punitive for long-term investors and creates liquidity problems. An alternative based on realised gains only has significant political support but has not been adopted. The final design is still subject to legislative change before 2028.
Box 3 deemed income counts as part of your “verzamelinkomen” (total taxable income across all boxes). As this total rises, the algemene heffingskorting — a general tax credit applied in Box 1 — phases down. For investors with substantial Box 3 wealth, this is effectively a hidden surcharge: more Box 3 deemed income means less tax credit in Box 1. The effect is most pronounced for investors with moderate Box 1 income and large Box 3 balances.
Common Box 3 mistakes
Most of these are fixable once you know about them. The expensive ones are the ones no one mentions.
IBKR Ireland, Trading 212, Revolut, Wise, and crypto exchange balances are all Box 3 taxable. If they are not pre-filled in your aangifte, that does not mean they are exempt — it means the broker did not report automatically.
Cash at a broker is taxed at ~5.88%. The same amount at a bank is taxed at ~1.44%. Moving idle cash to a bank savings account is the simplest and most consistently overlooked tax saving available to Dutch investors.
Box 3 is based on your balance on 1 January, not your gains during the year. Your portfolio can fall 30% and you still owe tax based on what you held at the start of that year. This is the system’s most counterintuitive feature — and the main legal argument driving the 2028 reform.
Fiscal partners can freely allocate Box 3 assets between them in any proportion. If one partner has a much higher income and therefore a lower marginal tax credit, allocating more assets to the lower-income partner can reduce the overall household bill.
Occupational pension entitlements, AOW state pension rights, and lijfrente assets are excluded from Box 3 entirely. They are taxed when drawn in Box 1. Investors often overstate their Box 3 wealth because they are uncertain about this.
Crypto is taxed on 1 January market value — not on realised gains, not on disposal. If you hold assets across multiple wallets or exchanges, you need the total EUR value on midnight 31 December / 1 January. Missing any wallet (hardware wallet, DeFi protocol, staking account) is an underdeclaration.
Choosing a broker as a Netherlands-based investor
Box 3 is assessed on the assets you hold, not where you hold them. But a few broker-specific considerations matter for Dutch investors.
Headquartered in Amsterdam, fully integrated with Dutch tax reporting. Very low transaction costs and a wide range of UCITS ETFs. Core selection ETFs available commission-free (one free trade per month per ETF).
Best for: beginner to intermediate investors building a straightforward ETF portfolio.
Preferred for investors who need access to more markets, lower FX conversion costs, higher cash interest on uninvested funds, and a platform they will not outgrow. IBKR Ireland does not auto-report to the Belastingdienst — you declare the balance yourself.
Best for: larger portfolios, multi-currency needs, experienced investors.
Ready to open an account?
For most Dutch ETF investors the choice comes down to two brokers. DEGIRO for straightforward low-cost portfolios; IBKR for larger accounts and multi-currency needs.
Go deeper
Frequently asked questions
How is Box 3 tax calculated in the Netherlands?
Box 3 tax is calculated on a deemed (fictitious) return, not your actual gains. The Belastingdienst assigns a fixed rate of return to your savings (~1.44%) and a higher rate to investments (~5.88%). Those rates are applied to your taxable wealth — total assets minus the ~€57,684 tax-free allowance — and 36% tax is levied on the resulting deemed income. You owe this tax regardless of whether your portfolio grew or declined during the year.
What is the Box 3 tax-free allowance in 2026?
The heffingvrij vermogen is approximately €57,684 per person for 2026. Fiscal partners can combine their allowances, giving a household threshold of roughly €115,368. Wealth below this threshold is not taxed at all. The exact figure is set annually by the Belastingdienst and may be slightly adjusted for inflation each year.
Do I pay Box 3 tax on my ETF portfolio?
Yes. ETFs and other investments held in a regular brokerage account are classified under the “investments and other assets” category in Box 3. In 2026 this carries a deemed return of approximately 5.88%, taxed at 36%. You pay this tax every year based on your portfolio value on 1 January — it does not matter whether you bought, sold, or held throughout the year.
Do foreign bank accounts and brokers count in Box 3?
Yes. Dutch tax residents are taxed on worldwide assets in Box 3. This includes foreign bank accounts (treated as bank savings, lower rate), foreign brokers such as IBKR Ireland and Trading 212 (treated as investments, higher rate), foreign crypto exchanges, and Revolut or Wise balances. If your foreign bank or broker does not automatically report to the Belastingdienst, you are responsible for declaring the balance yourself in your aangifte. Undeclared foreign assets are treated as tax evasion, not an oversight.
Does the 30% ruling affect Box 3?
Under the old system, 30% ruling holders could elect partial non-resident status and potentially exclude certain foreign assets from Box 3. As of 2025 this option has been abolished for everyone whose ruling started on or after 1 January 2024. Those with an earlier ruling have a transitional period until the end of 2026. From 2027, all Dutch tax residents — including 30% ruling holders — are taxed on worldwide assets in Box 3 without exception.
Is it better to hold cash or investments from a Box 3 perspective?
Bank savings carry a lower deemed return (~1.44%) than investments (~5.88%), so cash at a bank is taxed less heavily. However, the deemed return for investments approximates long-term market returns — investors who actually outperform the deemed rate get tax-efficient upside. Holding excess cash purely for tax reasons usually destroys more wealth in real terms than the tax saving is worth. The better question is: what does your actual financial plan require?
Can I use actual returns instead of the Box 3 deemed return?
For the 2017–2022 period under the old flat-rate system, many taxpayers were entitled to use actual returns via the massaal bezwaar process following the Hoge Raad ruling. Check belastingdienst.nl to see if your situation qualifies. Under the current transitional system (2023 onwards), a full actual-return option is not available to most investors — the deemed rates apply. A proper actual-return system (werkelijk rendement) is targeted for introduction in 2028.
Can I reduce my Box 3 tax as an investor?
Yes. The main legal strategies are: (1) filing with a fiscal partner to double your tax-free allowance; (2) maxing out lijfrente contributions to move assets into Box 1; (3) using certified green investments exempt up to €71,251 per person (note: this exemption is being phased out by 2028); (4) keeping idle cash in a bank account rather than your brokerage; (5) being mindful of large cash balances around 1 January, while respecting the anti-arbitrage rule.
What is the difference between Box 1, Box 2, and Box 3?
Box 1 covers income from employment and your primary home, taxed at progressive rates up to 49.5%. Box 2 covers dividends and gains from a substantial shareholding (5%+ in a company), taxed at 24.5–33%. Box 3 covers wealth from savings and investments, taxed at 36% on a deemed return — not on actual gains.
Does Box 3 tax actual gains or a deemed return?
Box 3 taxes a deemed return — a fixed percentage the government assumes you earned on your assets — not your actual realised gains or dividends. This system is under legal pressure and is being replaced by a real-return (werkelijk rendement) system, currently targeted for introduction in 2028. The transitional deemed-return system with differentiated rates applies until then.
When is Box 3 wealth assessed?
Your Box 3 balance is valued on 1 January of each tax year (the peildatum). Only the assets you hold on that single date determine your tax base for the entire year — there is no averaging across the year. Large temporary cash inflows arriving in late December (bonuses, property sale proceeds) can inflate your bill if they have not yet been redeployed.
What happens to Box 3 if I leave the Netherlands?
Box 3 applies to Dutch tax residents. Because the peildatum is 1 January, emigrating mid-year still means you owe Box 3 for that full tax year — you were a resident on 1 January. Timing your departure to very early January removes one full year of liability. Tax treaties between the Netherlands and other countries generally do not eliminate Box 3, as they are primarily designed around income taxes rather than wealth taxes. Confirm your exact situation with a belastingadviseur before emigrating.
QuantRoutine provides educational content only. Nothing on this page is tax or financial advice. Deemed return rates are set annually by the Belastingdienst and may differ from the approximations used here — always verify at belastingdienst.nl before filing. Consult a Dutch belastingadviseur for advice specific to your situation. Investments can lose value and past performance does not guarantee future results.