Tax Q&A in category: Country-Specific Tax Guidance

Question 1

Does my Canadian TFSA require Form 3520 filing as a foreign trust?

Accepted Answer

The IRS has never officially declared the Canadian Tax-Free Savings Account (TFSA) a foreign trust, but most U.S. tax professionals treat it as one and file Form 3520 and Form 3520-A conservatively because the penalty for missing these forms starts at $10,000 per form, per year. Until the IRS issues definitive guidance, filing is the safer path for most Americans in Canada.

Why the foreign trust question matters:

The U.S.-Canada Tax Treaty covers RRSPs explicitly, but is completely silent on TFSAs
Without treaty protection, the TFSA looks like a foreign grantor trust under U.S. tax law
The IRS has never issued a ruling confirming or denying this treatment
Some practitioners have successfully argued that TFSAs are custodial accounts at IRS Appeals, but the risk of non-filing outweighs the paperwork cost for most taxpayers

What filing conservatively looks like:

Form 3520-A (the “trust’s” annual return): due March 15, extendable to September 15 via Form 7004. Penalty: the greater of $10,000 or 5% of account value for late filing
Form 3520 (your report as U.S. owner): due with your Form 1040, including extensions. Penalty: the greater of $10,000 or 5 to 35% of account value, depending on the transaction type
FBAR (FinCEN 114): always required if all your foreign accounts combined exceed $10,000 at any point in the year, regardless of the trust debate

In practice, you typically prepare Form 3520-A yourself as the account’s de facto trustee, then attach it to your Form 3520.

If you have an unreported TFSA, the IRS Streamlined Filing Compliance Procedures can help you catch up with reduced or eliminated penalties.

For a full breakdown of TFSA tax treatment, investment strategy, and whether to keep or close your account, see our guide to TFSAs for U.S. citizens in Canada.

Question 2

Does the U.S.-Singapore tax treaty protect my CPF account from U.S. taxation?

Accepted Answer

No, the U.S.-Singapore tax treaty does not classify the Central Provident Fund (CPF) as a qualifying pension or retirement account. Unlike the U.S.-U.K. treaty, which explicitly protects SIPPs from current U.S. taxation under Article 18, the U.S.-Singapore treaty has no equivalent provision for CPF. That means CPF gets zero deferral protection on the U.S. side.

Why the treaty fails CPF holders:

No pension article coverage: The treaty’s limited scope does not extend to mandatory social savings programs like CPF
No “corresponding plan” election: The IRS does not recognize CPF as equivalent to a 401(k) or IRA, so there is no election to defer
No Foreign Tax Credit offset: Singapore does not tax CPF contributions or interest, so there is no foreign tax paid to credit against the U.S. liability

How this compares to other treaty-protected plans: Country planTreaty protection?U.S. deferral?U.K. SIPPYes (Article 18)Yes, if Form 3520/3520-A filedSingapore CPFNoNo, currently taxableAustralia SuperNoNo, currently taxableCanada RRSPYes (Article XVIII)Yes, if treaty election made

The practical impact is that U.S. expats in Singapore owe current-year U.S. tax on employer CPF contributions and annual CPF interest, even though those funds are locked and inaccessible until age 55. Without a Foreign Tax Credit to offset, the U.S. tax sticks entirely.

For a full breakdown of CPF reporting requirements and how the IRS taxes each CPF component, see How the IRS Treats CPF (Central Provident Funds).

Question 3

Do I owe U.S. tax on my Mexican bank account interest as a U.S. expat?

Accepted Answer

Yes, as a U.S. citizen or green card holder, you owe U.S. income tax on all worldwide interest income, including interest earned in a Mexican bank account, reported on Schedule B of Form 1040. You may also owe FBAR and Form 8938 filings depending on account balances.

Reporting stack for Mexican bank accounts:

Schedule B: interest income, with Part III disclosing foreign accounts if any single account exceeds $10,000 or the aggregate does
FBAR (FinCEN 114): required if total foreign financial accounts exceed $10,000 aggregate at any time
Form 8938: required if foreign financial assets exceed FATCA thresholds ($200,000 single / $400,000 MFJ at year’s end for expats)

Currency conversion:

Use the Treasury end-of-year rate for FBAR balance reporting
Use the transaction date or yearly average rate for income reporting (consistent method)
Document your conversion method and apply it uniformly

Foreign tax credit considerations:

Mexico withholds ISR (Impuesto Sobre la Renta) on interest, typically 1.04% to 1.45% of the principal (current rates; verify with Mexican tax authority), treated as advance tax against your Mexican return
The Mexican tax paid is generally creditable via Form 1116 in the passive category
High earners should track the FTC carryover since Mexican withholding can produce excess credits

Most Mexican banks now require a U.S. Social Security number for account holders under FATCA reporting rules (Mexico signed an IGA in 2012), so expect the IRS already knows about your account.

For more on filing U.S. taxes from Mexico, see our Taxes in Mexico for U.S. Expats.

Question 4

Does the U.S.-Israel tax treaty's savings clause prevent American expats from claiming treaty benefits on Israeli income?

Accepted Answer

Yes. Israeli provident funds and pension funds (Kupa Pensia, Kupa Gemelonot, insurance-backed plans) must be reported on your U.S. return on Form 3520-A as foreign trusts, and the accounts are subject to annual FBAR reporting if they exceed $10,000 in aggregate with other foreign accounts. The U.S.-Israel tax treaty does not grant deferral for these accounts.

Israeli pension reporting requirements:

FBAR (FinCEN 114): Required if provident fund plus all foreign accounts exceed $10,000 at any point in the year
Form 3520-A: Filed by the fund trustee or by you (as de facto trustee) to report the account’s annual activity
Form 3520: Your annual report as a U.S. beneficiary; due with your Form 1040, including extensions
Form 8938: Required if foreign financial assets exceed $200,000 (single) or $400,000 (MFJ) at year-end

Tax treatment of Israeli pension contributions and earnings: ElementU.S. treatmentYour contributionsNot deductible; reported as basisEmployer contributionsTaxable wages in the year creditedAnnual fund earnings (interest, dividends, capital gains)Taxable annually to you (not deferred)Withdrawals at retirementGenerally taxable; basis recovery trackedLoan from the fundTreated as a distribution; taxable on excess over basis

Israeli pension accounts are not treaty-protected, so the U.S. taxes the annual earnings even if the funds remain locked until retirement.

If you have unreported Israeli pension accounts, the IRS Streamlined Filing Compliance Procedures can help you catch up.

For broader Israeli expat tax guidance, see Taxes in Israel for U.S. Expats.

Question 5

Does the U.S.-Japan tax treaty protect my Japanese pension income from double taxation?

Accepted Answer

Yes. Under the U.S.-Japan tax treaty, employer and employee contributions to your Japanese pension (Kokumin Nenkin, Kosei Nenkin, or corporate DC/DB plan) are deferred from current U.S. tax, and plan earnings are generally not taxed until distribution. However, you must file Form 3520-A annually to claim the treaty deferral, and failure to file carries severe penalties.

Japanese pension treaty relief mechanics:

Contributions: Deferred from U.S. taxation in the year made (both employer and employee portions)
Earnings: Not taxed annually; deferred until distribution
Form 3520-A: Must be filed annually (due March 15, extendable to September 15) to establish the treaty-protected status; failure to file results in a penalty of the greater of $10,000 or 5% of account value
FBAR: Required if your Japanese pension plus all foreign accounts exceed $10,000 at any point in the year
Form 8938: Required if foreign financial assets exceed $200,000 (single) or $400,000 (MFJ) at year-end

Treaty eligibility for Japanese pensions:

Treaty deferral applies only to “personal pension arrangements” under Article 18 of the U.S.-Japan tax treaty
Corporate DB/DC plans and public Kosei Nenkin typically qualify
Kokumin Nenkin (National Pension) does not qualify (it is not an employer plan)

Filing timeline and penalties:

If you miss a single year of Form 3520-A filing, you lose treaty protection for that year, and the entire account balance becomes taxable, plus a $10,000+ penalty. For broader Japan expat tax compliance, see Americans in Japan: U.S. Tax Rules and Filing.

Question 6

Does the U.S.-UK tax treaty protect my UK SIPP or employer pension from current U.S. taxation?

Accepted Answer

Yes. Under the U.S.-UK tax treaty, a Self-Invested Personal Pension (SIPP) is treated as a tax-deferred retirement account, and contributions, earnings, and gains are not taxed in the U.S. until distribution. However, the deferral is not automatic; you must file Form 3520-A annually to claim treaty protection, and failure to file incurs a severe penalty ($10,000 or 5% of the account value).

UK SIPP treaty protection under the U.S.-UK tax treaty:

Contributions: Deferred from U.S. taxation in the year made
Fund earnings and capital gains: Not taxed annually; compounded tax-deferred
Form 3520-A: Must be filed annually (due March 15, extendable to September 15) to establish and maintain treaty protection
FBAR: Required if your SIPP plus all foreign accounts exceed $10,000 at any point in the year
Form 8938: Required if foreign financial assets exceed $200,000 (single) or $400,000 (MFJ) at year-end
UK tax on distributions: When you withdraw, the UK may impose income tax at your marginal rate; you can claim a Foreign Tax Credit on Form 1116

How the treaty deferral works:

A SIPP is classified as a trust under U.S. tax law, but Article 18 of the U.S.-UK tax treaty explicitly exempts qualifying pensions from current U.S. taxation, provided Form 3520-A is filed.

Consequences of missing Form 3520-A:

If you fail to file Form 3520-A for even one year, you lose treaty protection for that year
The entire account balance becomes immediately taxable as ordinary income
An accuracy-related penalty of $10,000 or 5% of account value (whichever is greater) applies
Recovering treaty protection after a lapse requires amended filings and penalty abatement requests

Distribution planning:

Withdrawals are taxable to the U.S. in the year received as ordinary income
Lump-sum distributions in early/mid-retirement trigger ordinary income tax, not capital gains rates
Qualified longevity annuity contracts (QLACs) from a SIPP are not recognized by the IRS; the annuity is taxable as income from the SIPP

For broader UK expat pension planning, see the U.S. Expat Tax Guide for Living in the UK.

Question 7

Is my French assurance vie policy classified as a PFIC or foreign trust for U.S. taxes?

Accepted Answer

A French Assurance Vie (investment-linked life insurance policy) is classified under U.S. tax law as either a Passive Foreign Investment Company (PFIC) if the underlying investments are diversified, or as a foreign grantor trust if you have significant control over the policy. Either classification requires annual Form 8621 or Form 3520-A reporting. The U.S.-France tax treaty does not exempt Assurance Vie from U.S. taxation.

How Assurance Vie is treated in the U.S. tax system:

Contributions: Not deductible; treated as basis additions
Annual earnings and gains: Taxable to the U.S. annually, not deferred (the policy is not a qualified contract)
Surrender and partial withdrawals: Taxed as a distribution of earnings first; basis recovery follows
Death benefit: Generally includible in your estate; taxable to heirs at stepped-up basis

PFIC vs. foreign trust classification: Assurance Vie treated as PFIC (most common):

Form 8621 must be filed annually
Excess distribution rules apply when you surrender or withdraw
Deferred PFIC tax (interest charge) compounds annually if MTM election not made
Mark-to-market election can simplify taxation to ordinary income annually

Assurance Vie treated as foreign grantor trust:

Form 3520-A filed by the issuer; Form 3520 filed by you
Annual reportable events trigger Form 3520 filing
Penalties start at $10,000 per form, per year if missed

Reporting mechanics: FormWhen filedPenalty for non-filingForm 8621 (PFIC)With Form 1040; no automatic extension40% accuracy-related penaltyForm 3520-A (trust)March 15, extendable to Sept 15Greater of $10,000 or 5% of FMVFBAR (if over $10k total foreign)FinCEN (separate filing); FATCA threshold$10,000 penalty, up to $100k for willful Minimizing tax on Assurance Vie:

Mark-to-market election on Form 8621: Simplifies taxation to ordinary income annually; prevents deferred tax compounding
Surrender planning: Withdrawals in years of low other income reduce rate pressure
Foreign Tax Credit: France may tax distributions; claim credit on Form 1116

For a full breakdown of Assurance Vie tax obligations, see Assurance Vie Taxation Guide for U.S. Expats in France.

Question 8

Does Portugal's NHR program eliminate my U.S. tax filing obligation or reduce my U.S. tax bill?

Accepted Answer

No. Portugal’s NHR program does not reduce your U.S. tax bill or eliminate your filing obligation. The U.S. taxes citizens and green card holders on worldwide income regardless of any foreign tax incentive. NHR only affects your Portuguese tax liability, and the program closed to new applicants on January 1, 2024. Portugal replaced it with the IFICI regime (also known as “NHR 2.0”) starting January 1, 2025. Neither program changes what you owe the IRS. For details on U.S. filing requirements abroad, see IRS Publication 54.

Key points for U.S. expats in Portugal:

NHR is closed to new applicants as of January 1, 2024; existing holders approved before that date keep their full 10-year benefit window
IFICI replaced NHR on January 1, 2025, offering a 20% flat rate on qualifying Portuguese-source income, but eligibility is limited to scientific research, investment, and innovation professionals
U.S. tax unchanged by either program; you still file Form 1040 on worldwide income and may claim the Foreign Tax Credit (Form 1116) or Foreign Earned Income Exclusion (up to $130,000) to reduce double taxation
Foreign-source income exemptions under NHR or IFICI do not generate a Foreign Tax Credit, because no Portuguese tax was paid on that income

How NHR and IFICI compare for U.S. tax planning: FactorNHR (pre-2024 holders)IFICI (2025 onward)EligibilityBroad; any new residentRestricted to qualified professionalsPortuguese tax on local income20% flat rate20% flat rateForeign-source incomeExempt (most types)Exempt (except blacklisted jurisdictions)FTC available to offset U.S. tax?Only on Portuguese-taxed incomeOnly on Portuguese-taxed incomeDuration10 years from approval10 years from residency Post-NHR planning for existing holders:

If your 10-year NHR window is still active, your Portuguese exemptions continue as originally granted. Once your window expires, all income becomes taxable at Portugal’s standard rates (14.5%-48%), which means your Foreign Tax Credit on Form 1116 will increase and your net U.S. liability will likely decrease.

For new arrivals who do not qualify for IFICI, standard Portuguese rates apply immediately, and the Foreign Earned Income Exclusion ($130,000 for the 2025 tax year) becomes particularly valuable for reducing your combined tax burden.

For broader Portugal expat tax planning, see Portugal Taxes for U.S. Expats.

Question 9

What U.S. tax forms do I need to file if I live in Germany as a U.S. citizen?

Accepted Answer

U.S. citizens living in Germany file Form 1040 annually along with FinCEN Form 114 (FBAR), Form 2555 or Form 1116 for double-tax relief, and often Form 8938 if FATCA thresholds are met. Additional forms apply for German investments, foreign businesses, or gifts from German relatives.

Core filings for Americans in Germany:

Form 1040: worldwide income
Schedule B: German bank and brokerage interest and dividends
Form 2555 (FEIE) or Form 1116 (FTC), or both
Schedule SE if self-employed and no totalization exemption
FBAR (FinCEN 114): filed separately on the BSA E-Filing system, due April 15 with automatic October 15 extension

Conditional filings triggered by asset thresholds or activity: SituationFormForeign financial assets over $200k single / $400k MFJ (living abroad)Form 8938German mutual funds (Investmentfonds) or ETFsForm 8621 (PFIC) per fundGerman GmbH ownership 10%+Form 5471German KG or OHG partnership interest 10%+Form 8865Gift from German person over $100,000Form 3520German Riester-Rente or Rürup-RenteEvaluate for Form 8938 and potential PFICState pension (gesetzliche Rente)Reported as income; treaty allocation

The U.S.-Germany totalization agreement exempts you from U.S. SE tax if you have a certificate of coverage from Deutsche Rentenversicherung.

German tax usually exceeds U.S. tax on employment income, making the Foreign Tax Credit the preferred strategy for high earners over the FEIE.

For more on Germany-specific filing, see our Expat Taxes in Germany.

Question 10

Are UK ISA Investments in Funds or ETFs Subject to PFIC Rules on My U.S. Return?

Accepted Answer

A UK Individual Savings Account (ISA) is classified as a Passive Foreign Investment Company (PFIC) under U.S. tax law, and you must report it annually on Form 8621 even if the account earned no income in that year. The U.S.-UK tax treaty does not exempt ISAs from PFIC reporting.

Why a UK ISA triggers PFIC classification:

An ISA is a wrapper holding securities (stocks, bonds, funds); the account itself is a PFIC
Form 8621 reporting is required every year you hold an ISA
You report your pro-rata share of the PFIC’s taxable income annually, even if no distribution occurred
Failure to file Form 8621 carries a 40% accuracy-related penalty plus interest

ISA and PFIC reporting mechanics: ISA elementU.S. tax treatmentCash ISA interestReportable as PFIC income on Form 8621Stocks/ETF capital gainsIncludible in PFIC mark-to-market or excess distributionLifetime ISA government bonusTreated as a nontaxable grant; added to basisISA subscription limitsNot relevant to U.S. tax; no deferralWithdrawals and transfersGenerally not taxed separately (basis recovery) Managing PFIC tax burden for ISAs:

Mark-to-market election on Form 8621: You annually report unrealized gains at ordinary income rates; distributions become basis returns. This prevents compound deferral tax but locks in annual recognition.
QEF election: Only possible if the underlying holdings provide tax reporting; ISAs generally do not qualify.
Separate Form 8621 per account: If you hold multiple ISAs, each must be reported separately.

Many UK expats overlook ISA PFIC reporting and face significant tax bills with penalties when audited.

For full ISA reporting requirements, see ISA Reporting for U.S. Expats in the UK.

Question 11

Are KiwiSaver Employer Contributions Currently Taxable on My U.S. Return Even If I Cannot Access Them?

Accepted Answer

Yes, under U.S. tax law, a KiwiSaver account is classified as a Passive Foreign Investment Company (PFIC), and you must report it annually on Form 8621 regardless of whether the account distributed income to you. The U.S.-New Zealand tax treaty does not exempt KiwiSaver from PFIC reporting.

How KiwiSaver triggers PFIC reporting:

KiwiSaver is a savings vehicle in which the fund holds shares and bonds; the account itself is treated as a PFIC
Form 8621 is required every year you hold KiwiSaver
You must report your proportionate share of the PFIC’s income even if no distribution occurred
If you do not file Form 8621, the IRS can impose accuracy-related penalties of 40% on unreported income plus interest

PFIC filing and taxation mechanics for KiwiSaver: ElementRuleAnnual Form 8621 requirementYes, for each KiwiSaver accountMark-to-market electionOften advisable to avoid deferred PFIC taxQualified Electing Fund (QEF) electionRequires fund cooperation; rarely availableExcess distribution rulesApplied to KiwiSaver payouts at retirementEmployer and member contributionsTreated as basis additions Filing options to reduce the PFIC tax burden:

Mark-to-market (MTM) election on Form 8621: You report unrealized gains annually at ordinary income rates; distributions are then taxed as return of basis. This locks in annual gains but avoids compound deferred tax.
QEF election: Only viable if the fund provides tax information; most KiwiSaver funds do not cooperate.
Portfolio approach: Track multiple KiwiSaver accounts separately on Form 8621.

The employer contribution tax is also not deferred in the U.S.; both your contributions and employer contributions are added to your basis in the PFIC, not deferred at source.

For broader New Zealand tax context, see Expat Taxes in New Zealand.

Question 12

Are Australian Superannuation Employer Contributions Currently Taxable on My U.S. Return Even If I Cannot Access Them Yet?

Accepted Answer

Yes. Australian superannuation is taxed by the U.S., and you must report it on Form 8621 as a Passive Foreign Investment Company (PFIC) or on Form 3520-A as a foreign trust, depending on your account structure. The U.S.-Australia tax treaty does not exempt superannuation from U.S. taxation or grant deferral.

How superannuation is taxed in the U.S.:

Contributions (both employer and employee) are taxable income in the U.S. in the year made, even though you cannot withdraw them
Earnings (interest, dividends, capital gains) are taxed annually within the account
When you reach preservation age and take a distribution, it is taxable as ordinary income
The account is treated as a PFIC or foreign grantor trust; the IRS does not recognize the Australian tax-deferred status

Reporting requirements for Australian superannuation: Reporting elementRequirementForm 8621 (PFIC)File annually if the fund holds diversified investments (most common)Form 3520-A (foreign trust)File if the account is treated as a foreign grantor trustFBAR (FinCEN 114)Required if superannuation plus all foreign accounts exceed $10,000 FATCA (Form 8938)Required if foreign financial assets exceed $200,000 (single) or $400,000 (MFJ)Form 1040 Schedule 1Report the annual taxable amount as foreign investment income Common misconception:

Many U.S. citizens in Australia assume the account is tax-deferred because Australia defers the earnings. This is false; the U.S. taxes both contributions and earnings annually.

Minimizing the tax burden:

Mark-to-market election on Form 8621: Annual unrealized gains are taxed at ordinary income rates; distributions are then basis returns. This prevents deferred compound taxation.
Foreign Tax Credit: If Australia taxes a distribution, you may claim the credit on Form 1116.

For a deeper dive into superannuation tax treatment, see Australia Superannuation and U.S. Taxation.