How Box 3 Wealth Tax Works in the Netherlands

Box 3 is the Dutch income tax category that covers savings, investments and other assets not taxed in Box 1 (employment) or Box 2 (substantial interest). Following a Supreme Court ruling in December 2021 that found the previous fixed-return system unlawful, the Netherlands moved to a transitional system based on actual returns for 2021 onwards. Understanding how Box 3 works in its current form is essential for anyone with Dutch savings or investment accounts.

box-3 netherlands dutch wealth-tax vermogensbelasting savings

Quick reference — 2025

Tax-free allowance (heffingsvrij vermogen)

57.000 per person

114.000 for fiscal partners

Box 3 tax rate

36%

Applied to deemed return on assets above threshold

Savings deemed return 2024

1,03%

Based on actual average savings rates

Investments deemed return 2024

6,04%

Based on long-term average investment return

What Box 3 covers and what it excludes

Box 3 applies to your net wealth — assets minus liabilities — on 1 January each year. Assets that fall within Box 3 include: savings accounts and deposit accounts, stocks, bonds, ETFs and investment funds held outside a pension, real estate not used as your primary residence (including property abroad), cash holdings above the minimum, crypto-currency, and other financial assets.

Assets explicitly excluded from Box 3 include: your primary residence (taxed under Box 1 via the notional rental value system), pension rights (taxed on payment in Box 1), business assets and a substantial shareholding of 5% or more in a company (taxed in Box 2), and certain exempt green investments up to a set limit.

Debts can be deducted from Box 3 assets, but only above a threshold of 3.400 per person (6.800 for fiscal partners) in 2025. This threshold means small debts cannot be used to reduce Box 3 assets. Mortgage debt on your primary residence is not deductible in Box 3 because the primary residence itself is not a Box 3 asset.

The net Box 3 wealth is calculated on 1 January — known as the peildatum. It does not matter what the balance was on 31 December or throughout the year. The value on 1 January is the only figure that determines the Box 3 assessment.

The 2025 transitional calculation

Formula

\text{Box 3 tax} = (\text{Savings} \times r_s + \text{Investments} \times r_i - \text{Debts} \times r_d) \times 36\%

Multiply savings by the savings deemed return rate, investments by the investment deemed return rate, and subtract debts multiplied by the debt deemed return rate. The result is the notional income. Apply the 36% Box 3 rate to this notional income to get the tax due.

r_sSavings deemed return rate — based on actual average savings interest rates (1,03% for 2024)

r_iInvestment deemed return rate — fixed long-term average return (6,04% for 2024)

r_dDebt deemed return rate — based on actual mortgage rates (2,47% for 2024)

36%The Box 3 income tax rate applied to the notional return

How the transitional system works in practice

The transitional system introduced after the 2021 Kerstarrest assigns assets to three categories: bank and savings accounts, investments, and debts. Each category has its own deemed return rate set annually by the tax authority based on actual market rates.

For the 2024 tax year (filed in 2025), the rates are: savings 1,03%, investments 6,04%, debts 2,47%. These rates differ significantly — the investment return of 6,04% is nearly six times the savings rate of 1,03%. This means a person holding 100.000 in savings pays significantly less Box 3 tax than a person holding 100.000 in investments, even with identical net wealth.

The total notional return from all assets minus debts is then taxed at 36%. The effective Box 3 tax rate as a percentage of actual assets is therefore 36% multiplied by the deemed return rate — for savings this is 36% x 1,03% = 0,37%, and for investments it is 36% x 6,04% = 2,17%.

Importantly, if your actual return was lower than the deemed return, the transitional rules allow you to use the actual lower return. This is the legacy of the Kerstarrest ruling. If your savings earned 0,5% but the deemed rate is 1,03%, you can opt for the actual return and pay less tax. You must elect this option — it does not apply automatically.

Worked examples

Example 1Single person — savings only

Given: Savings account: 120.000 | Investments: 0 | Debts: 0 | Tax-free allowance: 57.000 | Year: 2024

Result: Taxable wealth: 63.000 | Notional return: 649 | Box 3 tax: 234

Taxable wealth: 120.000 - 57.000 = 63.000. Deemed savings return: 63.000 x 1,03% = 649. Box 3 tax: 649 x 36% = 234. Effective rate on total savings: 234 / 120.000 = 0,20%. This is a very low effective rate because the savings deemed return is close to actual savings rates in 2024.

Example 2Single person — mixed savings and investments

Given: Savings: 80.000 | ETF portfolio: 150.000 | Debts: 0 | Tax-free allowance: 57.000

Result: Taxable wealth: 173.000 | Notional return: 9.530 | Box 3 tax: 3.431

Total assets: 230.000. Taxable: 230.000 - 57.000 = 173.000. Asset split (pro-rata): savings portion 173.000 x (80.000/230.000) = 60.174. Investment portion 173.000 x (150.000/230.000) = 112.826. Notional return: (60.174 x 1,03%) + (112.826 x 6,04%) = 620 + 6.815 = 7.435. Tax: 7.435 x 36% = 2.677. Note: actual calculation assigns the allowance pro-rata across asset categories.

Example 3Fiscal partners

Given: Combined savings: 200.000 | Combined investments: 100.000 | Tax-free allowance: 114.000 (combined)

Result: Taxable wealth: 186.000 | Notional return: 10.085 | Box 3 tax: 3.631

Total assets: 300.000. Taxable after joint allowance: 300.000 - 114.000 = 186.000. Fiscal partners can divide Box 3 assets between them in any proportion that minimises tax. Optimal split places the allowance against the highest-yielding assets. Full calculation requires the actual Belastingdienst allocation method which assigns allowance proportionally across asset types.

Netherlands Box 3 Calculator

Enter your savings, investments and debts to calculate your Box 3 wealth tax liability for the current year using the transitional rules.

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Box 3 deemed return rates — recent years

Tax Year	Savings Rate	Investment Rate	Debt Rate	Box 3 Tax Rate
2021	0,01%	5,69%	2,46%	31%
2022	0,00%	5,53%	2,28%	31%
2023	0,92%	6,17%	2,57%	32%
2024	1,03%	6,04%	2,47%	36%
2025	TBC	TBC	TBC	36%

Common mistakes with Box 3

✗ Not reporting foreign assets in Box 3

✓ Box 3 applies to worldwide assets for Dutch tax residents, not just Dutch accounts. Foreign savings accounts, overseas investment portfolios, foreign property (excluding primary residence), and foreign crypto holdings must all be included in Box 3. The Belastingdienst receives automatic information from foreign financial institutions in over 100 countries under the Common Reporting Standard.

✗ Forgetting that the peildatum is 1 January

✓ Box 3 is assessed on the balance on 1 January each year, not on average balances or year-end balances. Withdrawing funds just before 31 December and redepositing in early January — sometimes called peildatumarbitrage — to reduce the Box 3 balance is legal but scrutinised by the Belastingdienst if done repeatedly.

✗ Assuming the opt-out for actual returns applies automatically

✓ If your actual investment or savings returns were lower than the deemed rates, you must actively elect the actual return method in your tax return. It does not apply automatically. For years 2017 to 2022, a large number of taxpayers were eligible for refunds under the Kerstarrest ruling but had to submit a specific request — many missed the deadline.

✗ Not deducting eligible debts

✓ Debts can reduce your Box 3 taxable wealth, subject to the 3.400 threshold per person. This includes personal loans, credit card debt, and other consumer liabilities. Many people do not claim eligible debt deductions, overpaying Box 3 tax as a result. Mortgages on your primary residence do not qualify because the primary residence is not in Box 3.

Methodology

Box 3 calculations use the official Belastingdienst deemed return rates for each tax year. Asset categorisation follows the official three-category system: bank and savings accounts, investments, debts. The tax-free allowance for 2025 is 57.000 per person. The Box 3 rate is 36% for 2024 and 2025.

Box 3 legislation is in transition. The Dutch government plans to introduce a new permanent system from 2027 based on actual returns. Rates and rules for years after 2025 may change significantly. Always verify current figures with the Belastingdienst or a Dutch tax adviser.

Cite this guide

APAMLAChicago

https://calquify.com/guides/how-box-3-wealth-tax-works

Last updated: May 2026

Calculate your Box 3 wealth tax

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Frequently asked questions

What is the Box 3 tax-free allowance for 2025?

The heffingsvrij vermogen for 2025 is 57.000 per person. Fiscal partners who jointly file can combine their allowances for a total of 114.000 of tax-free wealth. Assets below this threshold are completely exempt from Box 3. The allowance applies to net wealth — assets minus eligible debts above the 3.400 debt threshold.

How is crypto-currency taxed in Box 3?

Crypto-currency held as an investment by Dutch tax residents falls in Box 3 and is taxed at the investment deemed return rate of 6,04% for 2024, with the 36% Box 3 rate applied to that notional return. The value is assessed on 1 January. If the value of your crypto portfolio on 1 January 2025 was 50.000 and your other Box 3 assets were below the 57.000 threshold, no Box 3 tax is due. If total assets exceed the threshold, the crypto value is included proportionally.

Can I reduce my Box 3 tax by moving savings to a pension?

Yes. Pension assets — whether in a workplace pension (pensioen) or a personal pension product like a lijfrente — are excluded from Box 3. Contributions to a lijfrente within the annual jaarruimte limits are deductible from Box 1 income and the resulting pension assets are not in Box 3. This makes pension contributions one of the most tax-efficient ways to reduce Box 3 exposure for high-wealth individuals, though pension funds are inaccessible until retirement age.

What is the new Box 3 system planned for 2027?

The Dutch government plans to replace the transitional deemed-return system with a genuine actual-return system from 2027. Under this system, Box 3 tax would be based on the actual interest, dividends and capital gains you receive each year, plus the unrealised increase in value of your investments. Savings interest would be taxed at 36% on actual interest received. Investment returns including unrealised gains would be taxed annually. This represents a fundamental shift from the current system and will require significant administrative changes for investors who will need to track annual unrealised gains.

Sources & References

› Belastingdienst — Box 3 vermogen Retrieved 2026-05-18

› Dutch Supreme Court — Kerstarrest, December 2021 Retrieved 2026-05-18

Formula based on standard mathematical and financial methods. Results are for informational purposes. Last reviewed May 2026. Version 1.