Comparisons

Swiss Foundation vs US Private Foundation: A Structural Comparison

By Hansruedi Mueller, Swiss foundation lawyer · Published 4 June 2026 · Last updated 4 June 2026

A Swiss charitable foundation is an autonomous legal entity under the Swiss Civil Code, Articles 80–89c, in which assets are irrevocably dedicated to a defined public-utility purpose. A US private foundation is a federal tax classification of a 501(c)(3) organisation under the Internal Revenue Code, usually a non-profit corporation formed under a state statute (Delaware being a common choice) that the Internal Revenue Service (IRS) has recognised as tax-exempt. They sit in two different legal systems and answer to two different rulebooks.

One point clears up most of the confusion straight away. A “Delaware foundation” is not a separate tax regime. Delaware is only the state of incorporation; tax-exemption is federal and is granted by the IRS. So “swiss vs delaware foundation” is really “swiss foundation vs US private foundation, incorporated in Delaware.” This guide compares the two honestly, governance, the payout rule, tax, reporting, and what it means for a donor, with primary sources and without overstating either side.

Key takeaways

• A US private foundation is a 501(c)(3) classified by the IRS; it is incorporated at state level (e.g. a Delaware non-stock corporation) but its tax-exemption is federal.
• US private foundations pay a 1.39% excise tax on net investment income (IRC §4940), must make a ≈5% minimum annual distribution (IRC §4942), face strict self-dealing rules (IRC §4941), and file a public Form 990-PF.
• A Swiss charitable foundation (Swiss Civil Code, Art. 80–89c) is exempt from direct taxes on public-utility grounds (Art. 56 lit. g of the Federal Direct Tax Act), with no fixed annual payout percentage, supervised by the ESA or a canton.
• US donors can deduct gifts to a US private foundation (30% of AGI for cash); they generally get no US income-tax deduction for a direct gift to a Swiss charity.
• Neither is universally better. US taxpayers wanting a US deduction lean American; those wanting a neutral, private, payout-flexible philanthropic vehicle lean Swiss. A US person keeps US tax duties either way.

The two structures defined

What a US private foundation (501(c)(3)) is

A US private foundation is one of the two kinds of 501(c)(3) charitable organisation; the other is a public charity. By default, every 501(c)(3) is a private foundation unless it qualifies as a public charity. In practice a private foundation is the classic donor- or family-funded, grant-making vehicle with a narrow funding base, hence “private.”

It is created in two steps. First, you incorporate at state level, commonly as a non-stock (“exempt”) corporation under the Delaware General Corporation Law, though any US state works. Second, you apply to the IRS for federal 501(c)(3) recognition. The two are distinct: Delaware’s standard incorporation template does not, by itself, satisfy the IRS, which requires specific purpose and dissolution language. Once the IRS issues its determination letter, exemption from state corporate income tax typically follows automatically. The takeaway: the entity is a creature of state law, but the tax status is federal.

What a Swiss charitable foundation is

A Swiss charitable foundation comes into being when a founder irrevocably endows assets for a defined purpose. On that endowment it becomes an autonomous legal person under the Swiss Civil Code, Articles 80–89c. It has no owners and no shareholders, only a fixed purpose, beneficiaries, and a foundation board (Stiftungsrat) that must act strictly within that purpose. To obtain tax exemption it must serve a genuine public utility (gemeinnützig). A Swiss family foundation (Familienstiftung) is a different animal, governed by Article 335 of the Civil Code and confined to narrow family-support purposes, it is not a charitable, tax-exempt vehicle, and so is not the right counterpart to a US private foundation. The fair comparison here is the Swiss charitable foundation against the US private foundation.

Swiss foundation vs US private foundation at a glance

The table summarises the principal differences. US points reflect the Internal Revenue Code; Swiss points reflect the Swiss Civil Code and the Federal Direct Tax Act.

Read the table as a starting point, not a verdict. The sections below explain where the differences actually matter.

Governance and supervision

Both structures separate the founder’s wealth from the entity and place it under a board, but they are policed very differently.

A US private foundation is governed by its board of directors or trustees and supervised, in tax terms, by the IRS through the Chapter 42 excise-tax regime. The most distinctive control is the self-dealing rule in IRC §4941: almost any financial transaction between the foundation and a “disqualified person”, substantial contributors, officers, directors, their family members, and entities they control (IRC §4946), is prohibited, even if the terms are fair to the foundation. Breach triggers a 10% excise tax on the disqualified person, a 5% tax on a foundation manager who knowingly takes part, and a punitive 200% second-tier tax if the act is not corrected in time. The rule is bright-line and unforgiving, which is precisely its point.

A Swiss charitable foundation is supervised by a public foundation supervisory authority. Foundations of national or international scope answer to the Federal Supervisory Authority for Foundations (ESA, Eidgenössische Stiftungsaufsicht), which supervised 5,060 foundations at the end of 2022; those operating mainly within one canton answer to the cantonal authority. The Stiftungsrat owes fiduciary duties and must avoid conflicts of interest, and the supervisory authority can intervene where a board strays from the purpose. There is no single §4941-style fixed-penalty schedule; control is exercised through supervision, audit and the board’s duties rather than a statutory excise-tax grid.

The payout rule: 5% minimum distribution vs no fixed payout

This is one of the sharpest structural contrasts, and it surprises many donors.

A US private (non-operating) foundation must make a minimum annual distribution. The rule, in IRC §4942, is built on a minimum investment return of 5% of the foundation’s net investment assets: that distributable amount, reduced by the §4940 excise tax, must be paid out each year as qualifying distributions, grants and reasonable charitable administrative expenses. Miss it, and the foundation faces a 30% excise tax on the undistributed income, rising to an additional 100% if it is not corrected within 90 days of IRS notice. In short, a US private foundation cannot simply accumulate its endowment indefinitely; the law forces money out the door every year.

Swiss law contains no equivalent fixed payout percentage. A Swiss charitable foundation must genuinely pursue and actually apply its means to its public-utility purpose, supervisors and tax authorities expect real charitable activity, not indefinite hoarding, but there is no statutory “5% rule” comparable to §4942. This gives a Swiss foundation more flexibility to build endowment, smooth grant-making across years, or fund large multi-year projects without an annual quota. The trade-off is that “no fixed rule” is not “no duty”: a foundation that visibly fails to act on its purpose risks losing its exemption.

Tax: US excise tax vs Swiss exemption

The two regimes treat the foundation’s own money very differently.

A US private foundation, although it is tax-exempt on its charitable activities, still pays a 1.39% excise tax on its net investment income under IRC §4940. This single rate has applied since tax years beginning after 20 December 2019, when the older two-tier 1%/2% system was repealed. It is a modest but real annual cost, reported on Form 990-PF. A US private foundation can also incur tax on excess business holdings (§4943), jeopardising investments (§4944) and taxable expenditures (§4945), a layered compliance regime.

A Swiss charitable foundation, by contrast, can be fully exempt from direct taxes. The basis is Article 56, letter g of the Federal Act on Direct Federal Taxation (the Bundesgesetz über die direkte Bundessteuer, DBG), which exempts legal entities pursuing a public-utility purpose, provided their funds are exclusively and irrevocably dedicated to that purpose. Exemption is not automatic: it is granted on application by the cantonal tax authority and requires an open, indefinite circle of beneficiaries, disinterested (altruistic) activity, and, as a rule, an unremunerated board. It covers direct federal tax and cantonal/municipal profit and capital tax, but not every tax (VAT, for instance, can still apply). You can read the criteria in our guide to the Swiss charitable foundation tax-exemption requirements. The headline difference: a qualifying Swiss foundation pays no annual investment-income excise tax of the US kind.

Reporting and privacy: Form 990-PF vs the Swiss register

Privacy expectations also diverge.

A US private foundation files Form 990-PF every year, regardless of income, disclosing its assets, investment income, the §4940 tax, qualifying distributions, individual grants, and governance details. Crucially, Form 990-PF is publicly disclosable, anyone can read a foundation’s grants and finances. US private foundations therefore offer comparatively little privacy.

A Swiss charitable foundation is entered in the commercial register and is subject to audit and supervisory reporting to the ESA or canton, but there is no public, line-item filing equivalent to the US 990-PF. A Swiss family foundation is not even registered, making it more confidential still. That said, privacy is not secrecy from the authorities: Swiss foundations remain subject to anti-money-laundering rules, and cross-border accounts fall within the automatic exchange of information (Common Reporting Standard). The Swiss structure is more private than a US private foundation, but it is not opaque to tax authorities.

Deductions and cross-border use for US donors

For many readers this is the decisive section, because the tax benefit sits with the donor, not only the foundation.

A US taxpayer who gives to a US private foundation can claim a federal income-tax deduction, limited to 30% of adjusted gross income (AGI) for cash gifts, and 20% of AGI for long-term capital-gain property (with further rules on how appreciated property is valued). Gifts to a qualifying 501(c)(3), including a private foundation, also qualify for the US estate-tax charitable deduction. These deductions are a core reason US donors choose a domestic private foundation.

A direct gift to a Swiss charity is treated differently. A US donor generally gets no US income-tax deduction for a direct contribution to a foreign charity; US deductions are reserved for US-qualifying organisations, subject to limited treaty relief or the use of a US “friends-of” intermediary. So a US donor whose primary goal is a US deduction will usually need a US vehicle, while a Swiss-resident or non-US donor faces no such obstacle and can use a Swiss charitable foundation directly. If you want to build the Swiss side, our guide on how to create a charitable foundation in Switzerland walks through it.

One rule overrides everything else for Americans: a US person (citizen or green-card holder) who founds or funds a Swiss foundation remains subject to US worldwide taxation and US information reporting. A Swiss foundation does not switch off FATCA, FBAR or the relevant IRS forms. We cover that compliance in depth in our guide for US citizens setting up a Swiss foundation under FATCA, this comparison deliberately stays structural and links there for the reporting detail.

Which structure suits whom

There is no universal winner. As a rule of thumb:

A US private foundation tends to suit you if you want:

• a US income-tax deduction (30% of AGI cash) and a US estate-tax deduction;
• US-dollar, US-domestic grant-making under familiar US governance; and
• you accept the §4940 excise tax, the ≈5% annual payout, the §4941 self-dealing regime and a public Form 990-PF.

A Swiss charitable foundation tends to suit you if you want:

• a neutral, stable, high-reputation European base for international philanthropy;
• no fixed annual payout percentage and greater privacy than a public 990-PF; and
• full direct-tax exemption on public-utility grounds, accepting that a US donor generally gets no US deduction for a direct gift.

Cross-border facts usually decide the question. If you are weighing structures more broadly, see our pillar foundation vs trust comparison, which sets the foundation against the common-law trust.

If you are choosing between a Swiss charitable foundation and a US private foundation, our Zug-based team can give you an impartial, sourced assessment based on your residence, citizenship and philanthropic goals. Book a consultation or speak to a Swiss foundation lawyer.

Frequently asked questions

How does a Swiss foundation compare to a US 501(c)(3)? A US private foundation is a 501(c)(3) classified by the IRS: it pays a 1.39% excise tax on net investment income, must distribute roughly 5% of its assets each year, follows strict self-dealing rules, and files a public Form 990-PF. A Swiss charitable foundation, under Swiss Civil Code Articles 80–89c, is exempt from direct taxes on public-utility grounds, has no fixed payout percentage, and reports to a supervisory authority rather than through a public 990-PF. Neither is universally better, it depends on the donor’s residence and goals.

Is a “Delaware foundation” a real thing? Not as a separate tax regime. Delaware is simply a popular state in which to incorporate a non-stock non-profit corporation. Tax-exemption is federal and comes from the IRS recognising the entity as a 501(c)(3). So a “Delaware foundation” is a US private foundation that happens to be incorporated in Delaware.

Does a Swiss foundation have a 5% payout rule? No. Swiss law has no equivalent to the US minimum-distribution rule in IRC §4942. A Swiss charitable foundation must genuinely pursue and apply its means to its public-utility purpose, but there is no fixed annual percentage it must distribute.

Can a US donor deduct a gift to a Swiss foundation? Generally not for US income tax. A direct contribution to a foreign charity usually does not qualify for a US deduction, which is reserved for US-qualifying organisations (subject to limited treaty relief or a US “friends-of” intermediary). A US donor seeking a deduction normally needs a US vehicle.

Are Swiss foundations subject to US tax? The Swiss foundation itself is a Swiss entity. But a US person who founds or funds it stays subject to US worldwide taxation and US reporting (FATCA, FBAR and the relevant IRS forms). A Swiss foundation does not remove those US obligations, see our FATCA guide for the detail.

Which is more private, a Swiss or a US private foundation? The Swiss structure. A US private foundation files a publicly disclosable Form 990-PF listing its grants and finances. A Swiss charitable foundation has no public 990 equivalent, and a Swiss family foundation is not even registered, though neither is secret from tax authorities, given AML rules and automatic information exchange.

What is the self-dealing rule in a US private foundation, and does Switzerland have an equivalent? Under IRC §4941, a US private foundation is broadly prohibited from financial transactions with a “disqualified person”, substantial contributors, officers, directors, their family members and entities they control, even if the terms are fair to the foundation. Breach triggers a 10% excise tax on the disqualified person, a 5% tax on a knowing foundation manager, and a punitive 200% second-tier tax if the act is not corrected. A Swiss charitable foundation has no §4941-style fixed-penalty schedule; instead, board members owe fiduciary duties and are supervised by the ESA or cantonal authority, which can intervene where a conflict of interest is not managed properly.

Can a US private foundation satisfy the 5% payout rule with administrative expenses alone? The distributable amount under IRC §4942 can be satisfied by a combination of qualifying grants and reasonable administrative expenses that are directly for charitable purposes, it does not have to be grants alone. However, the IRS scrutinises whether administrative expenses genuinely serve a charitable purpose, so a foundation that counts only overhead without actual grant-making is at risk. The 30% excise tax on undistributed income applies for each year the shortfall persists, and an additional 100% tax applies if not corrected within 90 days of an IRS notice.

Does incorporating in Delaware give a US private foundation any special tax advantage? No. Delaware is only the state of incorporation for a non-stock non-profit corporation; it has no separate foundation-tax regime. The tax-exemption that matters, 501(c)(3) status, is federal and is granted by the IRS through its determination letter process. Delaware’s standard incorporation articles do not by themselves satisfy IRS requirements; specific purpose and dissolution language is needed. Once the IRS issues its determination letter, exemption from Delaware corporate income tax follows automatically.

Can a US citizen avoid the 1.39% excise tax by moving assets to a Swiss foundation? No. A US person who founds or funds a Swiss foundation remains subject to US worldwide taxation and US information-reporting obligations, including FATCA, FBAR and the relevant IRS forms, because US tax follows the person, not the entity’s jurisdiction. A Swiss foundation does not extinguish the US excise-tax obligation on investment income earned through a US private foundation that the person controls, nor does it remove the reporting burden. For the full US-compliance picture, see our guide for US citizens setting up a Swiss foundation under FATCA.

What happens to a US private foundation’s assets if it stops making the 5% minimum distribution? Failure to meet the minimum distribution triggers a 30% excise tax under IRC §4942 on the undistributed amount for each year the deficiency goes uncorrected. If the IRS issues a deficiency notice and the foundation does not correct it within 90 days, an additional 100% tax applies to the remaining undistributed amount. In extreme cases the IRS can seek termination of the foundation’s 501(c)(3) status, which triggers a termination tax equal to the lower of the foundation’s net assets or the total benefit it received from tax exemption.

Is there a minimum endowment required to set up a US private foundation or a Swiss foundation? US law sets no statutory minimum endowment for a private foundation, though in practice the IRS filing fees, legal costs and ongoing compliance burden (990-PF, audit, legal review) make foundations with less than roughly USD 1–2 million economically inefficient. Swiss law likewise has no statutory minimum capital for a charitable foundation, but cantonal practice and supervisory expectations mean foundations with less than CHF 50,000–100,000 in initial endowment are rarely established; our guide to Swiss foundation costs sets out what is needed at formation.

Does a Swiss charitable foundation file anything equivalent to the US Form 990-PF? No. A Swiss charitable foundation files annual financial statements with its supervisory authority (the ESA or the relevant cantonal body) and is subject to audit under Swiss Civil Code Articles 83a and 83b, but there is no publicly disclosable filing analogous to Form 990-PF. The supervisory authority reviews the accounts and can intervene if the foundation is not using its assets for its declared purpose, but that oversight process is not public in the way that a US 990-PF is.

Can a Swiss charitable foundation accept donations from non-Swiss donors? Yes. A Swiss charitable foundation is an autonomous legal entity that can receive gifts from anyone, regardless of the donor’s nationality or residence. The donor’s ability to claim a tax deduction in their home country is a separate question, a US donor generally gets no US income-tax deduction for a direct gift to a Swiss charity, and donors in other jurisdictions will need to check their own rules. The foundation itself carries out the normal AML and Know Your Customer checks on incoming funds as required under Swiss anti-money-laundering law.

This article is general information and not a substitute for formal legal or tax advice. US tax outcomes in particular depend on your personal circumstances; US persons should consult a qualified US tax adviser. Please contact us for advice on your specific case.

Sources

• US private foundation excise taxes (overview, §§4940–4945; Form 990-PF): IRS, “Private foundation excise taxes.” https://www.irs.gov/charities-non-profits/private-foundations/private-foundation-excise-taxes (accessed 4 June 2026).
• Net investment income excise tax, 1.39% (§4940): IRS, “Tax on net investment income of private foundations: Reduction in tax” (single 1.39% rate for tax years beginning after 20 December 2019). https://www.irs.gov/charities-non-profits/private-foundations/tax-on-net-investment-income-of-private-foundations-reduction-in-tax (accessed 4 June 2026).
• Minimum distribution, ≈5% (§4942): IRS, “Taxes on failure to distribute income, Private foundations” (5% distributable amount; 30% and 100% penalties). https://www.irs.gov/charities-non-profits/private-foundations/taxes-on-failure-to-distribute-income-private-foundations (accessed 4 June 2026).
• Self-dealing (§4941; disqualified persons §4946): IRS, “Taxes on self-dealing: Private foundations” (10% / 5% / 200% taxes) and “IRC Section 4946, Definition of Disqualified Person.” https://www.irs.gov/charities-non-profits/private-foundations/taxes-on-self-dealing-private-foundations (accessed 4 June 2026).
• Donor charitable contribution deduction (30% / 20% AGI): IRS, “Charitable contribution deductions” and Publication 526 (2025), “Charitable Contributions.” https://www.irs.gov/charities-non-profits/charitable-organizations/charitable-contribution-deductions · https://www.irs.gov/publications/p526 (accessed 4 June 2026).
• State incorporation vs federal exemption (Delaware): Nolo, “How to Form a Delaware Nonprofit Corporation”; IncNow, “Delaware Nonprofit Corporation”; State of Delaware, Division of Revenue, Non-profit Corporations. https://www.nolo.com/legal-encyclopedia/forming-nonprofit-corporation-delaware-36056.html · https://revenue.delaware.gov/business-tax-forms/non-profit-corporations/ (accessed 4 June 2026).
• Swiss charitable foundation tax exemption (Art. 56 lit. g DBG): RSM Switzerland, “Tax exemption for associations and foundations: an opportunity governed by a strict regime”; Reichlin Hess, “Tax exemption of charitable institutions”; O. Arter (MLL Legal), “Charitable Foundations and Associations in Switzerland.” https://www.rsm.global/switzerland/en/news/tax-exemption-associations-and-foundations-opportunity-governed-strict-regime (accessed 4 June 2026).
• Swiss foundation supervision (ESA / cantonal; Art. 87 ZGB): Fundraiso, “Foundation supervision”; Swiss Federal Administration (admin.ch), “2022 Federal Supervisory Authority for Foundations FSAF review” (5,060 foundations end-2022). https://www.fundraiso.ch/en/page/foundation-supervision · https://www.admin.ch/gov/en/start/documentation/media-releases.msg-id-93766.html (accessed 4 June 2026).
• Swiss foundation law (ZGB Art. 80–89c, Art. 335): see our Swiss foundation law explainer and Article 335 family foundation guide.