U.S. Taxes for Americans Living in Switzerland: The 2026 Guide

Key takeaways

• Moving to Switzerland does not end your U.S. filing obligation. Under the saving clause in Article 1(2) of the 1996 U.S.–Switzerland income tax treaty, the United States keeps the right to tax its citizens (including former citizens) as if the treaty had not come into effect. Unusually, the Treasury Technical Explanation notes that this saving clause is unilateral: it restricts only U.S. taxing rights, not Swiss ones.
• The treaty has a special double-tax rule for U.S. citizens resident in Switzerland (Article 23(3)). For U.S.-source income, Switzerland gives relief only as if you were not a U.S. citizen, and the United States must then credit the remaining Swiss tax, treating the income as Swiss-source to the extent needed to avoid double taxation.
• The foreign tax credit alone does not always wipe out U.S. tax in Switzerland. Swiss income tax varies widely by canton and commune. In our illustrative 2026 example (a single employee in Zurich earning CHF 160,000), the foreign tax credit alone left about $4,234 of U.S. tax, while combining the foreign earned income exclusion (FEIE: $132,900 for 2026) with the housing exclusion and the credit reduced it to zero.
• There is a Social Security totalization agreement. Employees are generally covered only where they work; self-employed people are covered only where they live. Swiss AHV/AVS contributions are not creditable against U.S. income tax (IRS Pub. 514).
• The treaty gives U.S. citizens almost no protection for Swiss pension savings. The Article 28(4) pension-contribution rule and the dividend exemption for pension funds do not help U.S. citizens; the Technical Explanation expressly excludes U.S. citizens from Article 28(4) and excludes Swiss "contributory private savings plans" (pillar 3a-type plans) from the pension-fund dividend exemption. How the IRS taxes pillar 2 and 3a accounts was not found in the sources reviewed.
• FATCA reporting from Swiss banks continues under the "Model 2" agreement in force since June 2014. A "Model 1" agreement was signed on June 27, 2024, but according to the Swiss State Secretariat for International Finance its earliest entry into force is January 1, 2029.

Who is affected — and why living in Switzerland changes nothing about U.S. filing

Citizenship-based taxation and the saving clause

The United States taxes its citizens on worldwide income regardless of where they live. The U.S.–Switzerland treaty does not change this. Article 1(2) states that, notwithstanding any other provision except paragraph 3, the United States may tax its residents and "its citizens (including its former citizens) as if this Convention had not come into effect."

The Treasury Technical Explanation (TE) to the 1996 treaty describes this as "the traditional saving clause found in U.S. tax treaties" and adds a point specific to Switzerland: in many U.S. treaties the saving clause is reciprocal, but because Swiss tax policy did not call for that, the clause was made unilateral and affects only U.S. taxing rights.

The TE also explains that the United States reserves the right to tax certain former citizens. Its description of the former-citizen rule (section 877, with thresholds of $100,000 of average annual net income tax or $500,000 of net worth, and a 10-year period) reflects the law at the time of the 1996 TE. (The expatriation regime has since been changed by later legislation (sections 877A and 2801) — see our guide on the US exit tax; current IRS expatriation rules were not reviewed for this guide.)

What the saving clause does not override

Article 1(3)(a) lists benefits the United States must still grant to its citizens and residents despite the saving clause:

• correlative adjustments (Art. 9(2));
• reorganization and deemed-sale timing rules (Art. 13(6) and (7));
• relief from double taxation (Art. 23);
• non-discrimination (Art. 24);
• the mutual agreement procedure (Art. 25).

Article 1(3)(b) preserves further benefits (government service pay and pensions under Art. 19(1)–(2), students and trainees under Art. 20, diplomats under Art. 27, and pension contributions under Art. 28(4)) only for individuals "who are neither citizens of, nor have immigrant status in, the United States." In plain terms: a U.S. citizen or green card holder living in Switzerland cannot use those provisions against the IRS.

Treaty residence for U.S. citizens

Article 4(1)(a) contains an unusual rule: a U.S. citizen or green card holder who is not a Swiss resident is treated as a U.S. resident for treaty purposes only if he or she has a substantial presence, permanent home or habitual abode in the United States. The TE stresses that even when a citizen is not a U.S. treaty resident under this rule, the saving clause still applies, so the citizen "still is taxable on his worldwide income."

Filing deadline

U.S. citizens living abroad on the regular due date get an automatic two-month extension to June 15 for calendar-year returns, but interest still runs on any tax not paid by the regular due date (IRS Publication 54). (Further extension to October 15 via Form 4868 and the discretionary December 15 extension were not confirmed in the portion of Pub. 54 reviewed.)

What the U.S.–Switzerland treaty actually says

Instruments in force: Convention signed October 2, 1996, with a Protocol of the same date, general effective date January 1, 1998 (Art. 29); a Memorandum of Understanding; and a 2009 Protocol amending the treaty (signed September 23, 2009), with its own Treasury Technical Explanation, both listed on the IRS Switzerland treaty page. (The 2009 Protocol text and its entry-into-force date were not reviewed for this guide; it is understood to concern exchange of information, which is outside the scope of individual planning here.)

Taxes covered

On the Swiss side, the treaty covers federal, cantonal and communal taxes on income (Art. 2(2)(a)). The TE confirms the treaty does not cover Swiss capital (wealth) taxes. On the U.S. side, it covers federal income taxes, but Protocol paragraph 1 states that this "does not include social security taxes"; income taxes on Social Security benefits are covered.

Tie-breaker (Article 4(3))

If an individual is resident in both countries under domestic law, residence is assigned by a standard cascade: permanent home → center of vital interests → habitual abode → nationality → competent authority agreement.

For a U.S. citizen, the tie-breaker rarely matters for U.S. tax, because of the saving clause. It matters mainly for:

• Green card holders living in Switzerland, who may be treated as Swiss treaty residents. (The consequences of a green card holder claiming treaty non-residence (for example, under the long-term resident expatriation rules) were not reviewed in IRS sources for this guide.)
• Non-citizen spouses who elect joint filing. Protocol paragraph 2 provides that Swiss residents who make a spousal election under IRC section 6013 continue to be treated as Swiss residents under the treaty while being subject to U.S. tax as residents.

Lump-sum ("forfait") taxpayers

Article 4(5) provides that an individual who elects not to be subject to the generally imposed Swiss income taxes on all U.S.-source income is not a Swiss resident for treaty purposes. The TE explains this is aimed at the Swiss "forfait" (lump-sum, expenditure-based) tax.

Income categories

Income	Treaty rule (for a Swiss resident who is not a U.S. citizen)	Effect for a U.S. citizen
Dividends	Source-country tax capped at 15% (5% for companies holding ≥10% of voting stock) (Art. 10(2))	Saving clause: the U.S. taxes fully, subject to Art. 23(3)
Interest	Taxable only in residence state (Art. 11(1)), with anti-abuse exceptions	Same
Royalties	Taxable only in residence state (Art. 12(1))	Same
Capital gains	Real property: taxable where situated; most other property: residence state only (Art. 13)	Same
Employment income	Taxable where work is performed, with a 183-day exception (Art. 15)	Same
Private pensions and annuities	Taxable only in residence state (Art. 18)	Art. 18 is not an exception to the saving clause
U.S. Social Security	May be taxed by the residence state; source state capped at 15% (Art. 19(4))	Art. 19(4) is not an exception to the saving clause

What is different from other U.S. treaties

Based on the treaty and its TE, the features that stand out are:

1. Unilateral saving clause. The TE says it was made unilateral at Switzerland's request.
2. Article 23(3): special credit rule for U.S. citizens resident in Switzerland. See FEIE vs. foreign tax credit below.
3. Article 28(4): cross-border pension contributions may be treated as deductible by temporary residents for up to five taxable years, if the competent authority agrees that the plan "generally corresponds" to a domestic plan. The State Department's Letter of Submittal flagged this as unusual among U.S. treaties. U.S. citizens and green card holders are excluded (Art. 1(3)(b); TE).
4. Article 10(3): exemption from dividend withholding for pension plans that the source country's competent authority determines correspond to its own pension plans. The TE states that IRAs and Swiss "contributory private savings plans" are not pension plans for this purpose.
5. Article 22: limitation on benefits with an unusual Swiss family-foundation test (Art. 22(1)(g)).

(Comparisons with specific other U.S. treaties (for example, whether the U.K. or Canada treaties defer U.S. tax on accruals in local pension plans) were not checked against those treaties' texts for this guide. No provision deferring U.S. tax on undistributed earnings in Swiss pension plans was found in the U.S.–Switzerland treaty text reviewed.)

FEIE vs. foreign tax credit: which works better in Switzerland?

For the general mechanics of each tool, the stacking rule, and worked 2026 examples outside Swiss-specific rates, see our guide on FEIE vs. Foreign Tax Credit.

The two tools

Foreign earned income exclusion (FEIE, Form 2555). For 2026, the maximum exclusion is $132,900 (IRS news release IR-2025-103). You must meet either the bona fide residence test or the physical presence test (330 full days in a foreign country or countries during any 12-month period, per the IRS physical presence test page). Key consequences:

• You cannot take a credit or deduction for foreign taxes on income you exclude (Pub. 514; Pub. 54).
• The "stacking" rule: tax on your remaining income is computed at the rates that would have applied without the exclusion (Pub. 54).
• If you revoke the election, you need IRS approval to choose the same exclusion again within five tax years (IRS revocation page).
• Excluded income is not "compensation" for IRA contribution purposes (Pub. 590-A).
• Excluded income is added back to modified adjusted gross income for the net investment income tax (IRS NIIT Q&A).

Foreign housing exclusion. For 2026, IRS Notice 2026-25 sets the base housing amount at $21,264 (16% of the FEIE), the general limit at $39,870 (30%), and higher limits for three Swiss locations:

Location	2026 annual housing expense limit
Geneva	$116,900
Bern	$82,200
Zurich	$67,218

Other Swiss locations (for example, Basel, Lausanne or Zug) are not listed in Notice 2026-25, so the general limit applies. (The "general limit applies to unlisted locations" conclusion follows from the structure of the notice but the relevant sentence was not quoted in the material reviewed.)

Foreign tax credit (FTC, Form 1116). You credit Swiss income tax against U.S. income tax on the same income, subject to a limitation computed separately for each category. Wages are general category income; dividends and interest are generally passive category (Form 1116 instructions). Unused foreign taxes are carried back one year and then forward up to ten years (Pub. 514, example text). The IRS states that in most cases it is more advantageous to claim foreign income taxes as a credit rather than a deduction.

Swiss taxes that do not produce a foreign tax credit

• AHV/AVS, IV/AI, EO/APG and other Swiss social security contributions. Pub. 514: "No deduction or credit is allowed, however, for social security taxes" paid to a totalization-agreement country.
• Swiss wealth tax. The treaty does not cover it (TE). (No IRS guidance specific to Swiss wealth tax was reviewed; a capital tax would not be expected to qualify as a foreign income tax.)
• Refundable Swiss withholding tax (Verrechnungssteuer). The 35% Swiss withholding tax on capital income is refunded to Swiss-resident individuals who declare the income and assets properly (ESTV). (The U.S. rule that a refundable foreign tax is not a creditable "amount paid" (Treas. Reg. §1.901-2(e)) was not reviewed in primary text for this guide.)
• Church tax. (Whether cantonal church taxes qualify as creditable foreign income taxes was not found in the sources reviewed.)

The Article 23(3) "re-sourcing" rule for U.S.-source income

Where a Swiss resident who is a U.S. citizen has U.S.-source income that the U.S. taxes:

1. Switzerland grants relief only for the U.S. tax that would have been due if the person were not a U.S. citizen (Art. 23(3)(a)).
2. The United States allows a credit for the Swiss tax remaining after step 1, but not below the U.S. tax taken into account in step 1 (Art. 23(3)(b)).
3. For this purpose, the income is deemed to arise in Switzerland to the extent necessary to avoid double taxation (Art. 23(3)(c)).

The Form 1116 instructions require a separate Form 1116 for each amount of income re-sourced by treaty, and note that Form 8833 (treaty-based return position disclosure) may be required.

Example of the logic: U.S. dividends received by a U.S. citizen living in Zurich. A non-citizen Swiss resident would bear at most 15% U.S. tax (Art. 10(2)(b)). Switzerland therefore grants relief only for that 15%. The United States then taxes the dividend under domestic law but must credit the Swiss tax (after Swiss relief), with the dividend treated as foreign-source to the extent needed, while keeping at least the 15% treaty-level U.S. tax.

Which is usually better in Switzerland?

Switzerland's combined federal, cantonal and communal income tax varies substantially by location. (No ESTV cantonal tax burden data was retrieved for this guide; the general characterization that some cantons (for example, Zug and Schwyz) have materially lower income tax than others (for example, Geneva and Vaud) is widely reported but not verified here.)

The practical consequence:

• Where Swiss income tax on your wages exceeds the U.S. tax on the same wages, the FTC alone usually eliminates U.S. tax on those wages and can generate carryovers.
• Where Swiss tax is lower than U.S. tax, the FTC alone leaves residual U.S. tax, and combining the FEIE (and housing exclusion) with the FTC on the non-excluded portion may produce a lower result.
• The FEIE has costs: it disqualifies excluded wages as IRA compensation, wastes the Swiss tax attributable to excluded income (no credit, no carryover), and is sticky because of the five-year re-election rule.

There is no single correct answer. The worked comparison below shows how close the outcome can be.

Illustrative 2026 comparison: single employee in Zurich

Assumptions (all illustrative):

• Single U.S. citizen, Swiss-resident all year, employed locally in the city of Zurich.
• Gross salary CHF 160,000; no other income.
• Exchange rate assumption: CHF 1 = USD 1.25, so salary = $200,000. (Assumed rate; IRS yearly average rates for 2026 were not available at the time of writing.)
• Swiss income tax (federal + cantonal + communal, no church tax): CHF 26,000 = $32,500. (Illustrative assumption only, not computed with the ESTV tax calculator; actual tax depends on deductions, commune and personal circumstances.)
• Rent CHF 36,000 = $45,000 per year (for the housing exclusion variant).
• 2026 standard deduction $16,100; 2026 single brackets per IR-2025-103.
• Swiss tax attributable to excluded income is approximated pro rata by gross salary (simplified).

	A. FTC only	B. FEIE + FTC	C. FEIE + housing exclusion + FTC
Gross wages	$200,000	$200,000	$200,000
Excluded	$0	$132,900	$156,636 ($132,900 + $23,736 housing)
Taxable income	$183,900	$51,000	$27,264
U.S. tax before credit (stacking applied in B and C)	$36,734	$12,240	$6,543
Swiss tax eligible for credit	$32,500	$10,904	$7,047
Credit allowed	$32,500	$10,904	$6,543
U.S. tax due	$4,234	$1,336	$0
Swiss tax lost (attributable to excluded income)	$0	$21,596	$25,453
Carryover	$0	$0	~$503

Housing exclusion in C: $45,000 rent − $21,264 base = $23,736, within the $67,218 Zurich limit.

Variant — higher-tax location: if Swiss income tax on the same salary were CHF 36,000 ($45,000), the FTC alone would fully offset the $36,734 U.S. tax and leave about $8,266 of excess credit to carry back or forward, with no FEIE needed. (CHF 36,000 is an illustrative figure, not tied to a specific commune.)

Social Security: the U.S.–Swiss totalization agreement

Which agreement applies

The current U.S.–Swiss Social Security agreement entered into force on August 1, 2014, and replaced the 1979 agreement, its Protocol and the Supplementary Agreement of June 1, 1988 (SSA agreement text, Arts. 29.7 and 30.1). The 1996 tax treaty's TE refers to the earlier agreement, which entered into force November 1, 1980.

Employees

• General rule: employees are covered by the system of the country where they work (Art. 7.1). An American hired locally by a Swiss employer pays Swiss AHV/IV/EO and ALV and no U.S. Social Security tax.
• Detached workers: an employee sent by an employer to the other country for a period "not expected to exceed 5 years" stays only in the home-country system (Art. 7.2). A certificate of coverage is requested on form CH/USA 10 (SSA Switzerland pamphlet).

Self-employed

A self-employed person is covered only by the system of the country of residence (Art. 7.4; SSA POMS RS 02001.175). A U.S. citizen self-employed and resident in Switzerland therefore pays Swiss contributions and should be exempt from U.S. self-employment tax. Per the SSA pamphlet, a self-employed person who moves the business to the other country for five years or fewer keeps coverage in the original country.

(The IRS procedural requirement to attach the Swiss certificate of coverage (or a statement) to the U.S. return to claim exemption from U.S. self-employment tax is described in Pub. 54's totalization section, which was not retrieved in full for this guide.)

2026 Swiss contribution rates (for context)

	Employee	Employer	Self-employed
AHV/IV/EO	5.3%	5.3%	up to 10.0% (full rate from CHF 60,500 of income; sliding scale down to 5.371%; minimum CHF 530)
ALV (unemployment)	1.1% up to CHF 148,200	1.1% up to CHF 148,200	not applicable (Self-employed ALV exclusion not confirmed in sources reviewed.)

Sources: AHV/IV leaflets 2.01 and 2.02 (status January 1, 2026); FSIO SME guide 2026.

Interaction with income tax

Swiss social security contributions are not creditable or deductible for U.S. income tax (Pub. 514). U.S. Social Security benefits paid to a U.S. citizen living in Switzerland remain taxable by the U.S. under domestic law; the 15% U.S. cap in Art. 19(4) is not an exception to the saving clause. (The Swiss tax treatment of U.S. Social Security benefits under Art. 23(1)(d) (deduction of U.S. tax plus a one-third exemption) for a U.S. citizen, given Art. 23(3), was not confirmed in Swiss administrative guidance.)

U.S. retirement accounts (401(k), IRA, Roth)

What the treaty says

• Distributions: Art. 18(1) makes pensions in consideration of past employment taxable only in the residence state, and Art. 18(2) does the same for annuities. For a U.S. citizen, the saving clause means the U.S. can still tax the distribution under domestic law. Switzerland, as residence state, may also tax it.
• Double-tax relief: Art. 23(3) applies to U.S.-source income of a U.S. citizen resident in Switzerland. Because a non-citizen Swiss resident would owe no U.S. tax on a private pension (Art. 18), the U.S. tax "taken into account" by Switzerland would be zero, and the United States must credit the Swiss tax, treating the income as Swiss-source to the extent necessary. (This result is derived from the treaty text; neither the TE discussion of Art. 18/23(3) nor IRS guidance applying it to IRA or 401(k) distributions was reviewed.)
• Contributions: the Art. 28(4) contribution rule does not apply to U.S. citizens or green card holders (Art. 1(3)(b); TE).
• Dividend withholding: IRAs are not "pension plans" for the Art. 10(3) exemption (TE).

What is protected and what is not

Question	Answer from sources reviewed
Does the U.S. still tax 401(k)/IRA distributions?	Yes, under domestic law (saving clause).
Does Switzerland tax them?	The treaty gives the residence state the taxing right (Art. 18). Swiss domestic treatment: (Not reviewed in Swiss sources.).
Is double tax relieved?	Via Art. 23(3) re-sourcing and the U.S. foreign tax credit (derived from treaty text; see caveat above).
Does Switzerland respect Roth tax-free status or the tax-deferred growth inside a 401(k)/IRA?	Not found in the sources reviewed.
Can I keep contributing to an IRA?	Only with U.S.-taxable compensation: wages excluded under the FEIE do not count (Pub. 590-A). 2026 limit: $7,500 ($8,600 age 50+) (Pub. 590-A).

Swiss investments: PFIC risk and local retirement or savings accounts

For the full mechanics of the default §1291 regime, the QEF and mark-to-market elections, and Form 8621 reporting, see our guide on PFICs.

PFICs

A foreign corporation is a passive foreign investment company if 75% or more of its gross income is passive, or at least 50% of its assets produce or are held to produce passive income (Form 8621 instructions, rev. 12/2025). Most non-U.S. mutual funds and ETFs are likely to meet these tests. (The U.S. entity classification of specific Swiss fund types (for example, contractual funds/FCP vs. SICAV) was not reviewed; classification is fact-specific under the entity classification regulations.)

Consequences, per the Form 8621 instructions:

• Default (section 1291) regime: "excess distributions" (amounts above 125% of the prior three-year average) and all gain on disposition are allocated over the holding period; amounts allocated to prior PFIC years are taxed at the highest rate with an interest charge.
• QEF election: annual inclusion of the fund's ordinary earnings and net capital gain (requires information from the fund).
• Mark-to-market election: for "marketable stock," annual inclusion of unrealized gain as ordinary income.
• Reporting: generally one Form 8621 per PFIC per year. A de minimis exception from Part I applies if aggregate PFIC stock is $25,000 or less at year-end ($50,000 joint), provided there is no excess distribution or gain from a section 1291 fund.

(Whether failure to file Form 8621 keeps the statute of limitations open for the entire return (IRC §1298(f) / §6501(c)(8)) was not confirmed in the portion of the instructions reviewed.)

Pillar 2 (BVG/LPP occupational pension) and pillar 3a

• Treaty: gives U.S. citizens no relief on contributions (Art. 28(4) excluded) and does not include pillar 3a-type plans in the Art. 10(3) pension-fund dividend exemption (TE).
• U.S. income tax treatment of employer and employee contributions, investment growth and pillar 3a funds held inside these plans: not found in the sources reviewed. (No IRS ruling, publication or notice specific to Swiss pillar 2 or 3a was found. Treatment may depend on IRC rules for nonqualified foreign plans and foreign trusts; professional advice is needed.)
• Foreign trust reporting: Rev. Proc. 2020-17 exempts eligible U.S. individuals from Forms 3520/3520-A for "tax-favored foreign retirement trusts" meeting conditions such as contributions limited to earned income, annual contributions capped at $50,000 or lifetime at $1,000,000, withdrawal restrictions, and information reporting to the home-country authorities. It does not change Form 8938, FBAR, or income reporting obligations. (Whether a given pillar 2 fund or 3a account meets every Rev. Proc. 2020-17 condition was not determined; note that pillar 2 buy-ins and pillar 3a structures should be checked against the contribution caps.)
• Swiss rules for context: the Federal Department of Finance announced on November 17, 2025 that the maximum pillar 3a deductions remain unchanged for tax year 2026. (The exact 2026 amounts (commonly reported as CHF 7,258 with pillar 2 membership) could not be read from the ESTV page.)

Swiss bank accounts and Swiss withholding tax

Swiss interest and dividends bear 35% Verrechnungssteuer, refundable to Swiss residents who properly declare the income and assets in their Swiss return; claims must be filed within three years after the end of the calendar year in which the payment fell due (ESTV). For U.S. purposes, this income is reported in full; see FEIE vs. foreign tax credit above on creditability.

FBAR and FATCA

Your U.S. reporting obligations

	FBAR (FinCEN Form 114)	Form 8938 (FATCA)
Threshold	Aggregate foreign account value over $10,000 at any time during the year	Living abroad: single/MFS over $200,000 at year-end or $300,000 at any time; MFJ over $400,000 / $600,000
Filed with	FinCEN's BSA E-Filing System, not with the tax return	Your Form 1040
Due	April 15, automatic extension to October 15	Return due date, including extensions
Penalties	Inflation-adjusted civil penalties; willful violations up to the greater of $100,000 or 50% of the balance (base amounts); criminal penalties possible	$10,000, plus $10,000 per 30 days after IRS notice, up to $60,000; criminal penalties possible

Source: IRS, Comparison of Form 8938 and FBAR Requirements.

(Whether Swiss pillar 2 and pillar 3a accounts are "financial accounts" for FBAR purposes was not determined in FinCEN sources reviewed. Rev. Proc. 2020-17 states only that it does not change FBAR or Form 8938 obligations.)

FATCA in Switzerland and bank access

• Switzerland implements FATCA under a Model 2 agreement in force since June 2, 2014, with the implementing act in force since June 30, 2014 (SIF).
• A Model 1 agreement was signed June 27, 2024; it is not yet in force, and the earliest scheduled entry into force is January 1, 2029 (SIF, page dated June 29, 2026).
• Under the 1996 treaty's Memorandum of Understanding, Swiss banking secrecy does not prevent gathering documentary evidence from banks in tax fraud cases (MoU para. 8(d)).

(Individual Swiss banks' account-opening policies for U.S. persons (refusals, minimum balances, fees, investment restrictions) are commercial decisions not covered by any primary source reviewed.)

U.S. state income tax

Moving to Switzerland ends your federal obligations only if you give up citizenship. For state income tax, the key question is whether you remain domiciled in, or otherwise a resident of, your former state. Some states treat former residents as still taxable unless they clearly sever ties. (No state tax authority sources were reviewed for this guide; rules differ by state and should be checked with the relevant state. See our guide on state taxes after moving abroad.)

Full worked example (2026)

Profile. Emma, a single U.S. citizen, lives in the city of Zurich all year (B permit, local hire). Same assumptions as in FEIE vs. foreign tax credit above, plus:

• Salary CHF 160,000 ($200,000 at an assumed CHF 1 = USD 1.25). (Assumed rate.)
• Swiss income tax CHF 26,000 ($32,500). (Illustrative assumption.)
• Rent CHF 36,000 ($45,000).
• Swiss bank accounts: maximum aggregate balance CHF 40,000 ($50,000).
• Swiss pillar 3a account and pillar 2 vested benefits. (U.S. treatment not found in sources reviewed.)
• No U.S.-source income, no investment funds.

Social security. As a locally hired employee, Emma is covered only by the Swiss system (Agreement Art. 7.1). Her employee share: AHV/IV/EO 5.3% × CHF 160,000 = CHF 8,480; ALV 1.1% × CHF 148,200 = CHF 1,630.20. No U.S. Social Security tax. These amounts are not creditable for U.S. purposes (Pub. 514).

U.S. income tax. Using the comparison in FEIE vs. foreign tax credit above:

Approach	U.S. tax due
A. FTC only	$4,234
B. FEIE + FTC	$1,336
C. FEIE + housing exclusion + FTC	$0 (small credit carryover of ~$503)

Steps for approach C:

1. Physical presence or bona fide residence test met (all year in Switzerland).
2. FEIE $132,900; housing exclusion $45,000 − $21,264 = $23,736 (Zurich limit $67,218).
3. Remaining wages $43,364 − standard deduction $16,100 = taxable income $27,264.
4. Stacking: tax on ($27,264 + $156,636 = $183,900) = $36,734, minus tax on $156,636 = $30,191 → $6,543.
5. Swiss tax attributable to non-excluded wages ≈ $32,500 × 43,364/200,000 = $7,047 (simplified allocation).
6. Credit limited to $6,543 (all income foreign-source general category) → U.S. tax $0; excess ≈ $503 carried back/forward.

Trade-offs Emma should weigh. Approach C gives $0 tax this year but (i) removes IRA eligibility on the excluded wages (Pub. 590-A), (ii) loses ≈ $25,453 of Swiss tax as a credit, and (iii) makes it harder to switch back to the FTC alone for five years (revocation rule). If her income or Swiss tax changes, the ranking can flip.

Reporting. Form 1040 with Form 2555 and Form 1116 (general category); FBAR required (aggregate over $10,000); Form 8938 not required (below $200,000/$300,000). Return due June 15, 2027 under the automatic extension, with interest on unpaid tax from April 15 (Pub. 54).

Common mistakes Americans make after moving to Switzerland

1. Assuming the treaty exempts U.S. citizens. The saving clause (Art. 1(2)) keeps the U.S. taxing right; only the specific exceptions in Art. 1(3)(a) apply to citizens.
2. Defaulting to the FEIE without modeling the FTC (or the reverse). In Switzerland, the answer depends on the canton, commune and income level; see FEIE vs. foreign tax credit above.
3. Claiming a U.S. credit for Swiss social security contributions or wealth tax. Social security contributions are expressly non-creditable (Pub. 514); wealth tax is outside the treaty (TE).
4. Crediting refundable Swiss withholding tax. The 35% Verrechnungssteuer is refundable to properly declaring Swiss residents (ESTV). (U.S. creditability rule not reviewed in primary text.)
5. Buying Swiss funds or ETFs without PFIC analysis. Default PFIC taxation and Form 8621 can be costly (Form 8621 instructions).
6. Assuming pillar 2 and pillar 3a are U.S. tax-deferred. No primary source reviewed supports this; the treaty does not provide it for U.S. citizens.
7. Forgetting FBAR and Form 8938, which have separate thresholds and filing locations (IRS comparison page).
8. Self-employed Americans paying U.S. self-employment tax unnecessarily, or failing to document Swiss coverage (Agreement Art. 7.4).
9. Contributing to an IRA with FEIE-excluded wages (Pub. 590-A).
10. Ignoring U.S.-source income re-sourcing, which requires a separate Form 1116 and possibly Form 8833 (Form 1116 instructions).

Frequently asked questions

Does the U.S.–Swiss treaty stop the IRS from taxing me if I live in Switzerland?

No. Article 1(2) allows the United States to tax its citizens as if the treaty had not come into effect, subject only to the exceptions in Article 1(3).

Can I use both the FEIE and the foreign tax credit?

Yes, but not on the same income. You cannot claim a credit for foreign taxes on income you exclude (Pub. 514; Pub. 54), so the credit applies only to non-excluded income.

Do I pay U.S. Social Security tax while working for a Swiss employer?

Generally no. Under Article 7.1 of the U.S.–Swiss Social Security agreement, employees are covered by the country where they work, unless they are detached workers sent for up to five years (Art. 7.2).

Is my Swiss pillar 3a account tax-deferred for U.S. purposes?

This was not found in the sources reviewed. The treaty does not provide deferral for U.S. citizens, and the Technical Explanation excludes Swiss contributory private savings plans from the pension-fund dividend exemption. Rev. Proc. 2020-17 may remove Form 3520 reporting if conditions are met, but it does not change income reporting.

Do I need to report my Swiss accounts if Swiss banks already report them under FATCA?

Yes. FBAR (over $10,000 aggregate) and Form 8938 (above the thresholds for taxpayers living abroad) are your own obligations, separate from bank reporting (IRS comparison page).

Will Switzerland's FATCA agreement change soon?

A Model 1 agreement was signed on June 27, 2024, but according to SIF its earliest entry into force is January 1, 2029. Until then, the Model 2 framework in force since June 2014 continues.

When to hire a professional

Consider a U.S. tax professional with Swiss experience (and, where needed, a Swiss tax adviser) if you:

• hold, or plan to buy, Swiss or other non-U.S. funds, ETFs or structured products (PFIC);
• have pillar 2 vested benefits, are considering pillar 2 buy-ins, or hold securities-based pillar 3a solutions;
• receive or plan withdrawals from U.S. retirement accounts while living in Switzerland, or hold a Roth IRA;
• have U.S.-source dividends, interest, rental income or business income (Art. 23(3) re-sourcing, Form 8833);
• are self-employed or have a Swiss company (totalization coverage, entity classification, CFC rules);
• are a green card holder (treaty tie-breaker and expatriation consequences);
• are considering lump-sum (forfait) taxation (Art. 4(5));
• have missed prior FBAR, Form 8938 or tax filings — see our guide on the Streamlined Filing Compliance Procedures;
• are considering renouncing U.S. citizenship.

Sources

Source	URL	Used for	Date of page
IRS – Switzerland tax treaty documents	https://www.irs.gov/businesses/international-businesses/switzerland-tax-treaty-documents	List of treaty instruments	Last reviewed Aug. 9, 2026
U.S.–Switzerland Income Tax Convention (1996), Protocol, MoU	https://www.irs.gov/pub/irs-trty/swiss.pdf	Treaty articles cited	Signed Oct. 2, 1996
Treasury Technical Explanation (1996)	https://www.irs.gov/pub/irs-trty/swistech.pdf	Saving clause, Art. 4, Art. 10(3), Art. 28(4), taxes covered	1996 (portion through Art. 12 reviewed)
2009 Protocol	https://www.congress.gov/112/cdoc/tdoc1/CDOC-112tdoc1.pdf	Existence only (not reviewed)	2009
IRS IR-2025-103 – 2026 inflation adjustments	https://www.irs.gov/newsroom/irs-releases-tax-inflation-adjustments-for-tax-year-2026-including-amendments-from-the-one-big-beautiful-bill	FEIE, standard deduction, brackets 2026	Oct. 9, 2025
IRS Notice 2026-25 – housing cost amounts	https://www.irs.gov/pub/irs-drop/n-26-25.pdf	2026 housing base and Swiss limits	2026 (IRB 2026-17, Apr. 20, 2026)
IRS Publication 54	https://www.irs.gov/publications/p54	June 15 extension, stacking, no credit on excluded income	Rev. 12/2025
IRS – Physical presence test	https://www.irs.gov/individuals/international-taxpayers/foreign-earned-income-exclusion-physical-presence-test	330-day test	Not stated
IRS – Revoking the FEIE choice	https://www.irs.gov/individuals/international-taxpayers/revoking-your-choice-to-exclude-foreign-earned-income	Five-year rule	Not stated
IRS Publication 514	https://www.irs.gov/publications/p514	Social security taxes not creditable; excluded income; carryover	2025
IRS – Foreign tax credit	https://www.irs.gov/individuals/international-taxpayers/foreign-tax-credit	Credit vs deduction	Not stated
IRS – Instructions for Form 1116	https://www.irs.gov/instructions/i1116	Categories, re-sourced income, Form 8833	2025
IRS – NIIT Q&A	https://www.irs.gov/newsroom/questions-and-answers-on-the-net-investment-income-tax	FTC vs NIIT; FEIE add-back	Not stated
IRS Publication 590-A	https://www.irs.gov/publications/p590a	IRA compensation; 2026 limits	2025
IRS – Instructions for Form 8621	https://www.irs.gov/instructions/i8621	PFIC rules and de minimis	Rev. 12/2025
IRS Rev. Proc. 2020-17	https://www.irs.gov/pub/irs-drop/rp-20-17.pdf	Form 3520 exemption for foreign retirement trusts	2020
IRS – Comparison of Form 8938 and FBAR	https://www.irs.gov/businesses/comparison-of-form-8938-and-fbar-requirements	FBAR/8938 thresholds, penalties	Not stated
SSA – U.S.–Swiss Social Security agreement text	https://www.ssa.gov/international/Agreement_Texts/switzrld.html	Arts. 7.1, 7.2, 7.4; entry into force	In force Aug. 1, 2014
SSA – Agreement pamphlet (Switzerland)	https://www.ssa.gov/international/Agreement_Pamphlets/switzrld.html	Certificates of coverage	Certified Nov. 25, 2019
SSA POMS RS 02001.175	https://secure.ssa.gov/poms.Nsf/lnx/0302001175	Self-employment coverage rule	Effective Sep. 14, 2022
SIF – FATCA agreement	https://www.sif.admin.ch/en/fatca-agreement	Model 2 / Model 1 status	June 29, 2026
AHV/IV leaflet 2.01	https://www.ahv-iv.ch/p/2.01.d	2026 wage contribution rates	Status Jan. 1, 2026
AHV/IV leaflet 2.02	https://www.ahv-iv.ch/p/2.02.d	2026 self-employed rates	Status Jan. 1, 2026
FSIO – Social insurance guide for SMEs 2026	https://www.bsv.admin.ch/dam/de/sd-web/CEMzEhplKCJn/d_kmu_2026_def.pdf	2026 ALV rate and ceiling	2026
EFD – Pillar 3a maximum deductions 2026	https://www.efd.admin.ch/de/newnsb/xgRMirCsezICX4rtof9Lm	3a limits unchanged for 2026	Nov. 17, 2025
ESTV – Withholding tax	https://www.estv.admin.ch/estv/de/home/verrechnungssteuer.html	35% rate and refund	Not stated

A note on scope: this guide is general information, not tax or legal advice. Which treaty provisions and elections apply to you, how the saving clause and Article 1(3) interact in your case, and how your canton treats your specific accounts all depend on your own facts. Get advice from a US preparer experienced with Forms 1116, 8621 and 8938 and a Swiss tax adviser before you rely on anything in this guide.