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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchA wealth tax applies to the value of assets owned, usually net of eligible liabilities. Income tax applies to taxable income as it is earned or received, while capital-gains tax applies to appreciation in an asset’s value—often when the asset is sold. The exact bases, timing, exemptions and rates depend on the jurisdiction and the design of the tax.
What each tax applies to
| Tax | Tax base | Typical timing |
|---|---|---|
| Recurrent net-wealth tax | The value of covered assets, typically minus eligible liabilities | Periodically, based on ownership and valuation at a specified time |
| Income tax | Taxable income, such as wages or investment income | As income is earned or received, according to the applicable rules |
| Capital-gains tax | The increase in an asset’s value | Often when the asset is sold or otherwise realized under the applicable rules |
These are broad categories, not universal legal definitions. A country’s law determines which assets, liabilities, income and gains count, and how they are valued and taxed. The OECD’s 2018 overview describes the distinction between net-wealth taxes and taxes on income and gains: OECD, The Role and Design of Net Wealth Taxes in the OECD.
Why a wealth tax can be due without income or a sale
A recurrent wealth tax is based on the asset stock, not necessarily on the cash it produces. It can therefore apply to a covered asset that generates no income, or when an owner has not sold an asset and realized a gain. By contrast, a tax on capital income follows taxable returns, and a realization-based capital-gains tax generally follows a gain when the relevant sale or other realization occurs. The OECD discusses these differences in its 2018 chapter on the case for and against individual net-wealth taxes.
This is why a wealth tax is not simply another name for a tax on unrealized gains. A wealth tax can apply to the value of the whole covered net-asset base; a gains tax targets appreciation, and its timing and calculation can differ.
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Why the headline rates are not directly comparable
A percentage rate has meaning only alongside its tax base. The OECD’s 2018 illustration shows how the bases affect a comparison: a person with €10 million in net wealth earning a 4% return has €400,000 in returns. A 30% tax on that capital income would produce a €120,000 liability; a 1.2% tax on the €10 million wealth stock would also produce €120,000. The apparent equivalence depends on the assumed 4% return.
If the return in that illustration rises to 5%, a 30% tax on the resulting €500,000 in capital income is €150,000, while the 1.2% tax on the unchanged €10 million wealth base remains €120,000. When returns are low or negative but asset values remain positive, a wealth-tax bill can still arise even when tax on current capital income is small or zero. These figures are an OECD illustration, not rates or rules that apply generally.
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Timing: periodic ownership versus realization
A recurrent wealth tax can use current asset valuations to tax the stock periodically. A capital-gains tax based on realization commonly waits until a sale, which can defer tax and may affect an owner’s decision about when to sell—the potential “lock-in” effect discussed by the OECD. Accrual-based taxation also faces practical challenges, including keeping valuations current. These are design tendencies rather than rules that hold in every tax system; timing and valuation methods vary.
How the taxes interact in policy
A wealth tax does not operate in isolation from taxes on capital income, gains, inheritance or gifts. In its 2018 assessment, the OECD found limited arguments for adding a recurrent individual net-wealth tax where broad-based personal capital-income taxes and well-designed inheritance and gift taxes are already in place. It saw a stronger possible substitution role where capital-income or wealth-transfer taxes are limited or infeasible. This is the report’s conditional policy assessment, not a settled consensus or a description of any particular country’s current law. See the OECD report conclusions.
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The report also provides historical context: 12 OECD countries had recurrent individual net-wealth taxes in 1990, while four still levied them in 2017. Those are historical counts reported by the OECD in 2018, not a current count of countries with such taxes.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to compare in a specific country
For a useful comparison, check the current law or tax-authority guidance for the relevant jurisdiction. The OECD’s framework points to six practical questions:
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- Tax base: Does the tax apply to net assets, income flows or realized appreciation?
- Timing: Is it triggered by periodic ownership, receipt of income or a sale or other realization?
- Coverage: Which assets and liabilities are included?
- Valuation: How and how often are assets valued?
- Thresholds and rates: What exemptions, deductions and rates apply?
- Interaction: How does the tax combine with taxes on investment income, gains, inheritance and gifts?
The OECD’s framework explains the comparison, but the answers for an individual taxpayer depend on current jurisdiction-specific rules.
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