Americans in Switzerland: Why the New $15 Million Estate Tax Exemption May Not Matter

Why The 2026 Headline Is Not The Whole Story

If you are an American living in Zurich, Geneva, Zug, or Basel, the 2026 US estate tax rules apply to you just as they do to an American in Florida, but the Swiss side of the picture is unlike any other country in Europe.

This article explains how the One Big Beautiful Bill Act (OBBBA) changed the US estate and gift tax regime for American families in Switzerland, how Swiss inheritance tax works at the cantonal level, and, for families with assets between $1 million and $10million, where the real planning questions now sit.

What Actually Changed

The One Big Beautiful Bill Act (OBBBA),signed into law in 2025, permanently sets the federal estate, gift, and GST tax exemption at $15 million per individual for deaths and gifts occurring on or after January 1, 2026. A married couple, using portability, can shelter $30million combined. The figure is indexed for inflation from 2027. The top federal estate tax rate remains 40%.

For US citizens and US-domiciled individuals, the critical point is that OBBBA applies regardless of where a person lives. A US citizen in Zurich, Geneva, or Zug is taxed on worldwide assets at death, just as a US citizen in New York is. OBBBA changed the size of the exemption, not whether it applies to Americans abroad.

What OBBBA did not change is the rest of the system: state-level US estate taxes, the $60,000 US-situs exemption fornon-resident aliens, and the separate Swiss cantonal regimes that sit alongside.

How Switzerland Taxes Wealth at Death

Switzerland is unusual among European jurisdictions in that there is no federal inheritance tax. Inheritance tax is acantonal matter, which means 26 separate regimes, each with its own rates,thresholds, and exemptions. Two features, however, are close to universal.

First, transfers to a surviving spouse are exempt across cantons. Transfers to direct descendants, children and grandchildren, are either fully exempt or taxed at low rates. For most American families in Switzerland whose estates pass first to the surviving spouse and then to children, cantonal inheritance tax is often a secondary issue.

Second, where transfers go to non-direct beneficiaries, siblings, unmarried partners, non-relatives, non-profit entitie sin some cantons, cantonal rates can be materially higher, and the progression steepens quickly. The canton of the deceased's last residence generally determines which regime applies; cantonal tax administrations publish the current schedules.

Switzerland also operates a separate statutory forced heirship framework under the Swiss Civil Code, reformed in2023 to give testators more freedom to dispose of their estate. It is distinct from the tax rules but interacts with estate planning, particularly where a US will is in place.

The cantonal point, in plain terms

Canton of residence matters. The same family, with the same estate, passing to the same beneficiaries, can face very different cantonal inheritance tax outcomes depending on whether they are resident in Zurich, Geneva, Zug, Vaud, or elsewhere. An American family relocating within Switzerland, or choosing between cantons, is also choosing between different inheritance tax systems.

How the US and Swiss Rules Interact

The US and Switzerland have had an estate tax convention in force since 1951. It is one of the oldest US estate tax treaties and its structure reflects its age, but for American families in Switzerland three features matter most.

It allocates primary taxing rights using a domicile-based test. A person domiciled in the US is primarily taxed by the US on worldwide assets; a person domiciled in Switzerland is primarily taxed on Swiss-situs assets in Switzerland, with US-situs assets remaining subject to the US federal regime.

It contains a credit mechanism: tax paid in one country on an asset situated there can be credited against the other country's tax on the same asset. This is the primary mechanism preventing double taxation on the same property.

What the treaty does not do is harmonize the two systems, and its interaction with Swiss cantonal inheritance taxes is a fact-specific question. Both systems can apply; the treaty adjusts how they combine, particularly at the federal and treaty-covered level.

What This Means for American Families with $1Mto $10M in Switzerland

For most American families in Switzerland in this bracket, OBBBA's $15 million federal exemption means US estate tax is unlikely to be the primary concern at death. Swiss inheritance tax is also unlikely to be the primary concern where the estate passes to a spouse or direct descendants. The planning questions therefore sit in three other places.

The first is the Swiss pension system. Pillar 2 (the occupational pension) and pillar 3a (the tied private pension)wealth passes under specific statutory rules at death. These rules, not an ordinary testamentary distribution, govern who receives the balance. For an American family with significant Swiss pension savings, the interaction with a US estate plan and with US tax reporting is a specific planning item.

The second is the non-US-citizen spouse. The unlimited US marital deduction applies only where the surviving spouse is a US citizen; otherwise, the standard route is a Qualified Domestic Trust (QDOT).Many American households in Switzerland are mixed-nationality, and the QDOT question can shift the center of gravity of the estate plan.

The third is choice of canton and the 2023Swiss Civil Code reform. Neither is a US tax matter, but both affect how an estate is ultimately structured, which beneficiaries receive which assets, and at what cost.

What I see most often with American families in Switzerland is that they have a strong Swiss estate plan and a strong US estate plan, but the two documents have never been reviewed side-by-side. The 2026 US changes are a good prompt to do so.

Swiss Inheritance Tax and US Estate Tax at a Glance

Illustrative comparison of the core features of the US federal estate tax regime and the Swiss inheritance tax regime for an American family in Switzerland. The table names the mechanism rather than fixed figures; live schedules are published by the IRS and each Swiss canton.

Source: Skybound 2026

Questions To Raise With A Qualified Adviser

For a US citizen or dual national in Switzerland with assets between $1 million and $10 million, a short list of questions for a qualified tax or estate professional and a cross-border financial planner includes:

•  In which canton am I resident, and how does that canton’s inheritance tax regime apply to my estate and intended beneficiaries?
• Do any of my intended beneficiaries fall outside the spouse/direct-descendant category, and how are they treated by my canton?
• How are my pillar 2 and pillar3a balances treated at death, and is that outcome consistent with my US estate plan and US tax reporting?
• If my spouse is not a US citizen, how is our estate structured to address the US marital-deduction rules(including any QDOT) alongside Swiss rules?
• Has my US will been reviewed alongside any Swiss will or marital property contract so that they operate consistently under the 2023 Swiss Civil Code framework?

The US exemption change is significant. For most American families in Switzerland, what it really does is shift the focus to the Swiss side, pensions, canton, succession, and to the coordination between the two plans.