Part IV · Tax Regimes · No. 08

Annual wealth taxes

A small group of jurisdictions impose an annual tax on the net worth of resident individuals. The OECD member states that have such a tax today are far fewer than in the 1990s; the design problems are well understood; the political debate over reintroduction is constant.

The rule

A wealth tax is an annual tax on a taxpayer's net wealth — gross assets less liabilities — typically above a threshold. It is distinct from a one-time wealth tax (a capital levy), distinct from inheritance and estate tax (which is imposed once at transfer), and distinct from capital-gains tax (which is imposed on realized appreciation). The wealth tax reaches the stock of wealth, not the flow of income or the moment of transfer.

Jurisdictions that currently impose a wealth tax

As of the review date, the wealth tax exists in a small number of jurisdictions:

• Switzerland — Wealth tax is imposed at the cantonal and communal level, not federally. Rates are progressive within each canton, generally from approximately 0.1% to 1.0% of net wealth depending on residence canton and total wealth. The tax base is worldwide assets for residents (subject to treaty modification). See Switzerland.
• Spain — National wealth tax (Impuesto sobre el Patrimonio) with autonomous-community variation. Madrid historically offered a 100% rebate (effectively no wealth tax for Madrid residents); Spain enacted a national "solidarity tax on great fortunes" in 2022 to override regional rebates for the highest-wealth taxpayers.
• Norway — Wealth tax at both municipal and national level. Rates and thresholds are adjusted annually; the tax is the source of recurring political debate and high-profile resident departures.
• Liechtenstein — Modest wealth tax applied through the income-tax system.
• Argentina — Recurring extraordinary wealth taxes, including a one-time "solidarity contribution" in 2020 and a continuing personal-asset tax.

Countries that have repealed their wealth tax in recent decades include France (repealed and replaced with a real-estate-specific wealth tax in 2018), Germany (the tax was held unconstitutional in 1995 and has not been reinstated), Sweden (repealed 2007), Denmark (repealed 1997), Austria (repealed 1993), and the Netherlands (replaced with a deemed-return income tax under Box 3 — currently under reform after Supreme Court decisions in 2021 and 2024).

Scope

A wealth tax typically reaches:

• Real estate (residence and investment property).
• Securities (publicly traded and private).
• Cash and bank deposits.
• Cash-value life insurance.
• Interests in closely held entities.
• Tangible personal property — including art, yachts, aircraft, jewelry and watches — although the practical reach of the tax to undisclosed tangible property has always been limited.

Common exclusions or reduced valuations:

• Pension and retirement savings.
• Primary residence (full exclusion or reduced valuation in some jurisdictions).
• Business assets (qualifying operating-business interests, in jurisdictions that exclude productive capital).
• Personal-use household items below a threshold.

Rate and computation

Rates are universally low in nominal terms compared with income tax — between approximately 0.1% and 2% per year on net wealth. The compounding effect over decades is material, but the headline rate is modest. Where the tax exists alongside an income tax with low top rate (Switzerland), the combined burden remains internationally competitive. Where the rate is high (Norway, Spain after the solidarity overlay), the combined burden of wealth tax plus income tax exceeds 50% of investment return for many high-net-worth residents.

The design problem of wealth tax is valuation. Cash and listed securities are easy. Closely held entities are difficult and produce constant disputes. Art and tangible property are valued on declared basis, with audit risk asymmetric: an under-declaration is hard to detect; an over-declaration is rare. Real estate is generally valued at official property-tax-roll values, which can be well below market.

U.S. proposals

The United States has not imposed a wealth tax at the federal level. Constitutional questions exist under the Sixteenth Amendment and under the apportionment requirement of Article I, §§2 and 9 — whether a wealth tax is a "direct tax" requiring apportionment by population. The Supreme Court's decision in Moore v. United States, 602 U.S. 572 (2024), addressed the realization principle in the context of the §965 transition tax and was watched closely for signals on a possible wealth-tax constitutional challenge; the Court resolved on narrow grounds without reaching the broad question.

Federal wealth-tax proposals have circulated in Congress for years. Senator Warren's proposed Ultra-Millionaire Tax Act would impose a 2% annual tax on net wealth above $50 million and a 3% surcharge above $1 billion. Senator Sanders has introduced parallel proposals. None has been enacted. State-level wealth-tax proposals have been introduced in California, New York, Massachusetts, Washington, Illinois, and Connecticut without enactment as of the review date.

Elections and exceptions

Most wealth-tax jurisdictions offer specialized reductions:

• Cap on combined wealth and income tax. Several jurisdictions cap the combined tax at a percentage of income (Switzerland's "Schutz-Klausel" in some cantons; France's pre-2018 "bouclier fiscal").
• Business-asset relief. Operating-business interests held in substance by the taxpayer often qualify for reduced valuation or exemption.
• Lump-sum taxation. Switzerland's impôt à forfait permits qualifying non-Swiss-national residents to be taxed on a deemed living-cost base rather than on actual worldwide income and wealth; the canton-specific regime materially changes the wealth-tax exposure for qualifying residents. See Switzerland.
• Non-domiciled regimes. The United Kingdom's resident non-domiciled status historically limited foreign-source income and gains exposure (the regime is being phased out beginning 2025). See United Kingdom.
• Italian flat tax. Italy's Article 24-bis TUIR regime offers new resident-electors a substitute tax on all foreign income at a flat annual amount, with similar effect to non-domiciled treatment for foreign wealth. See Italy.
• Portuguese non-habitual resident regime. Modified beginning 2024 but variants continue. See Portugal.

Interaction with other regimes

• Income tax. Wealth tax is paid from after-income-tax wealth. Income tax and wealth tax stack, often with combined-burden caps.
• Estate / inheritance tax. Some wealth-tax jurisdictions also impose inheritance tax (France, Spain, Switzerland cantonally); others have repealed inheritance tax (Sweden, Norway).
• Treaty relief. A handful of tax treaties (Switzerland-United States, others) include wealth-tax provisions limiting source-state taxation of cross-border wealth. The OECD Model includes a "capital tax" article (Article 22) that is often modified or omitted in bilateral negotiation.
• Reporting / exchange of information. The OECD Common Reporting Standard provides foreign financial-account data that wealth-tax authorities use to verify declarations.

Common planning approaches

• Choice of residence. The principal lever. A high-net-worth taxpayer's choice of jurisdiction has the largest single tax effect, and the wealth-tax exposure is often the deciding variable.
• Substance for business-asset relief. Where business-asset relief is available, structuring holdings to qualify — typically requiring active management role and minimum holding periods — can reduce the wealth-tax base materially.
• Use of insurance wrappers. In some jurisdictions, cash-value life insurance and similar wrappers receive favored valuation or deferral treatment. PPLI is the principal U.S. parallel; foreign equivalents have similar logic.
• Trust holdings. Trusts in jurisdictions outside the taxpayer's residence may move assets outside the wealth-tax base if the residence jurisdiction's anti-avoidance rules do not look through. Look-through regimes (CFC-style rules for trusts; French and Spanish rules on settlements) limit the technique.
• Real-estate location. Real estate is sometimes valued at below-market tax-roll values for wealth tax. The location and assessed value of real estate in the residence jurisdiction is therefore relevant.
• Treaty positioning. Where a tax treaty allocates wealth-tax jurisdiction differently from income tax, the taxpayer's residence in a treaty partner state may produce relief unavailable in a non-treaty jurisdiction.

Recent developments

The Spanish national "solidarity tax on great fortunes" enacted in 2022 was extended and is the most prominent recent wealth-tax legislation. The political driver was the perception that the autonomous-community variation in wealth-tax administration (particularly Madrid's rebate) had hollowed out the national tax.

Norway raised wealth-tax rates and increased the basis for valuing closely held shares in budget legislation for 2022 and 2023; the changes produced a much-reported wave of Norwegian high-net-worth resident departures to Switzerland.

The Netherlands' Box 3 deemed-return regime has been ruled by the Hoge Raad (Supreme Court) to violate the European Convention on Human Rights' protection of property where the deemed return exceeds actual return. A reform statute is in process; the design choice between an income-based regime and a wealth-tax regime remains open.

At the OECD level, the 2024 G20 Brazilian presidency advanced a coordinated proposal for a 2% minimum tax on the wealth of high-net-worth individuals; the proposal received some endorsements but no implementing instrument has been adopted.

Reviewed May 2026