Is there a penalty under the Streamlined Foreign Offshore Procedures?

No offshore penalty applies under the foreign version. The IRS states that a compliant filer is not subject to failure-to-file, failure-to-pay, accuracy-related, information return or FBAR penalties for the covered years. You still pay any tax due and statutory interest. The 5% miscellaneous offshore penalty belongs only to the Streamlined Domestic Offshore Procedures, which apply to people who do not meet the non-residency test.

Will my Swiss bank have reported my account to the IRS?

You should assume so. The US Treasury lists a FATCA agreement with Switzerland under Model 2 as in force since June 2014, under which Swiss financial institutions report information on US accounts directly to the IRS. A Model 1 agreement is listed as signed. A streamlined submission should therefore reconcile to the bank's own statements, because the IRS may already hold data about the account.

Can I claim a US foreign tax credit for the full 35% Swiss withholding tax?

Generally not. Switzerland withholds 35% anticipatory tax on investment income such as dividends, but a resident of a country with a Swiss tax treaty can recover part of it. The recoverable portion is not treated as a final tax, so only the non-recoverable amount belongs in the US credit computation. For a UK resident, the reclaim is usually made under the UK-Switzerland treaty, which should be confirmed in each case.

Does HMRC tax Swiss bank income of a US citizen living in London?

Yes. A UK resident is taxed on Swiss income and gains and must report them on Self Assessment. The old remittance basis has now been replaced by a residence-based system with a time-limited relief for certain new arrivals, so most long-term London residents are taxed on Swiss income as it arises. UK tax paid on that income is usually the main foreign tax credit on the US return.

What if the IRS has already contacted me about an examination?

You cannot then use the streamlined procedures. The IRS states that a taxpayer whose returns are under civil examination for any year is ineligible, even where the examination has nothing to do with foreign accounts, and that a taxpayer under criminal investigation is also excluded. Any unreported Swiss account then has to be dealt with inside the examination, so it is worth acting before IRS contact.

IRS Streamlined Filing Experts for Swiss Bank Accounts

Q: Can I use the Streamlined Foreign Offshore Procedures for a Swiss account if I live in London?

Usually, if two tests are met. You must meet the IRS non-residency test, which for a US citizen means no US abode and at least 330 full days outside the United States in one of the three most recent years for which the return due date has passed. Your failure to report must also have been non-wilful, meaning due to negligence, inadvertence, mistake or a good-faith misunderstanding of the law.

IRS Streamlined Filing Experts who work with London-based US citizens holding Swiss bank or custody accounts start with one question before any form is drafted: can the client honestly certify that the past failures were non-wilful? If the answer is yes, and the client meets the non-residency test, the Streamlined Foreign Offshore Procedures let them file three years of returns and six years of FBARs with no offshore penalty. If the answer is doubtful, the right route may be a different one entirely, and finding that out early is the most valuable part of the work.

Swiss accounts tend to be old, multi-currency, professionally managed and full of collective investment funds, and they sit inside a reporting system that has given the IRS account-level information for more than a decade. In the returns we prepare for high-net-worth clients in London, the Swiss relationship is usually the largest source of technical work in a streamlined submission: multi-currency maximum values, partly reclaimable Swiss withholding tax, fund holdings inside the passive foreign investment company regime, and a factual history that must be read carefully before anyone signs a certification under penalty of perjury.

What do IRS Streamlined Filing Experts do differently for Swiss bank account holders?

The Streamlined Filing Compliance Procedures are an IRS programme for individuals whose failure to report foreign income and assets was non-wilful. The IRS defines non-wilful conduct as conduct due to negligence, inadvertence or mistake, or conduct resulting from a good-faith misunderstanding of the law. The programme overview is at https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures and the version for people living abroad, the Streamlined Foreign Offshore Procedures, is at https://www.irs.gov/individuals/international-taxpayers/us-taxpayers-residing-outside-the-united-states.

For a client with a Swiss private banking relationship, a specialist adds layers of work that a general preparer often skips:

Document reconstruction: every Swiss statement, valuation and tax voucher for the six FBAR years and three tax years, requested from the institution where the client's records are incomplete.
A facts review before any return is drafted: how the account was opened, how correspondence was handled and what the client told the bank about US status.
Multi-currency maximum-value work, account by account, so that the FBAR and Form 8938 figures reconcile with each other and with the bank's own records.
Withholding tax analysis that separates the Swiss tax that is final from the portion that could be reclaimed under a tax treaty, because only the former belongs in a foreign tax credit computation.
Fund-by-fund classification of Swiss and Luxembourg collective investment vehicles under the passive foreign investment company rules, with a Form 8621 for each one that requires it.
A parallel UK review, since the same Swiss income is taxable in the UK for a UK resident and the US and UK computations need to agree on the underlying figures.

Which Swiss accounts go on the FBAR and Form 8938?

The FBAR (FinCEN Form 114) is required when a US person has a financial interest in, or signature authority over, foreign financial accounts whose aggregate value exceeds $10,000 at any time during the calendar year. FinCEN explains the filing obligation and the BSA E-Filing System at https://www.fincen.gov/report-foreign-bank-and-financial-accounts. The FBAR is due on 15 April with an automatic six-month extension to 15 October, as the IRS comparison page confirms.

Form 8938 is a separate IRS form attached to the income tax return. For taxpayers living abroad, the IRS comparison at https://www.irs.gov/businesses/comparison-of-form-8938-and-fbar-requirements sets the thresholds at more than $200,000 on the last day of the year or more than $300,000 at any time during the year for unmarried filers, and more than $400,000 at year-end or more than $600,000 at any time for married couples filing jointly. A Swiss private banking client clears these thresholds almost by definition.

A single Swiss relationship often contains several reportable accounts: a Swiss franc current account, separate euro, sterling and dollar accounts, a custody account holding the portfolio, and sometimes a precious metals account. Each is assessed separately, and the IRS comparison page confirms that accounts at foreign financial institutions and foreign mutual funds are reportable on both forms.

Signature authority over a Swiss account owned by a family member or a company also creates an FBAR obligation, even with no financial interest.

Does a Swiss bank report a US client's account to the IRS?

Yes, in most cases. The US Treasury list of FATCA intergovernmental agreements at https://home.treasury.gov/policy-issues/tax-policy/foreign-account-tax-compliance-act shows Switzerland with a Model 2 agreement in force since 2 June 2014. Under a Model 2 arrangement, financial institutions register with the IRS and report information on US accounts directly, rather than through their own tax authority. The same Treasury table lists a Model 1 agreement with Switzerland as signed; it did not show an entry-into-force date when we checked during October 2026, so the Model 2 framework remains the operative one for past years.

The practical consequence is simple: a London-based US citizen with a Swiss account should assume the IRS already holds, or can obtain, data about it. Swiss institutions have long asked clients to confirm US status, and how a client responded is visible in the bank's records. A streamlined submission must be consistent with what the IRS can already see, which is why specialists reconcile figures to the bank's statements rather than to memory.

How is the maximum value of a multi-currency Swiss account calculated?

The FBAR asks for the maximum value of each account during the calendar year. The IRS comparison page states that the filer uses periodic account statements to determine the maximum value in the currency of the account, and then converts that figure into US dollars using the calendar year-end exchange rate. Form 8938 uses fair market value in US dollars following its own instructions.

Multi-currency relationships create three recurring problems:

Sub-accounts in different currencies often carry separate account numbers. Each is a separate account for FBAR purposes, and each needs its own maximum value in its own currency before conversion.
Portfolio valuations are usually month-end or quarter-end snapshots. Where a large sale or transfer happened mid-month, the statement balance can understate the true peak, and a careful preparer looks at transaction-level data around large movements.
Cash swept between currency accounts can make the sum of maximums far exceed the real wealth in the relationship. That is correct for FBAR purposes, but it should be explained in the file.

How does the 35% Swiss withholding tax interact with the US foreign tax credit?

Switzerland levies an anticipatory tax, often called Swiss withholding tax, on investment income. The Swiss Federal Tax Administration page at https://www.estv.admin.ch/en/anticipatory-tax states a rate of 35% for investment income such as Swiss dividends, and explains that for recipients domiciled abroad the tax is generally a final charge unless their state of residence has a double taxation agreement with Switzerland, in which case all or part of it can be recovered depending on that agreement.

This is where Swiss accounts trip up general preparers. A US citizen resident in London is typically a UK resident for treaty purposes, so the relevant reclaim is usually made under the UK-Switzerland agreement, although the treaty position should be confirmed case by case. Whatever the treaty, the portion of the 35% that could have been reclaimed is not a final tax. As a matter of US foreign tax credit principles, a foreign tax that the taxpayer could recover is not a creditable tax, so claiming a credit for the full 35% on the US return overstates the credit.

In the returns we prepare, we identify the treaty rate that applies, treat the excess as a reclaim receivable (filing the Swiss reclaim where the Swiss deadline is still open), and credit only the non-recoverable portion. A reclaim that was never made does not automatically make the excess creditable in the US.

The UK also taxes the Swiss dividend for a UK resident, with relief for Swiss tax generally limited to the treaty rate. The US return then reflects the UK tax actually paid, often a larger credit than the Swiss tax, so the Swiss, UK and US figures belong on one reconciled schedule.

Are Swiss and Luxembourg funds in a managed portfolio PFICs?

Very often, yes. A passive foreign investment company is, broadly, a non-US corporation whose income or assets are predominantly passive. Most non-US collective investment funds, including the Swiss and Luxembourg funds that dominate many Swiss discretionary mandates, are treated as corporations for US tax purposes and meet the passive tests. A US person holding them generally has a Form 8621 filing requirement for each fund, subject to the exceptions in the form instructions.

The default PFIC regime is punitive: gains on disposal and certain larger distributions are spread back over the holding period, taxed at the highest ordinary rate for each year, and charged an interest amount. Softer elections need information funds rarely provide to US investors, or careful timing. For a streamlined filer, the job is usually to compute the default regime correctly for the three tax years, consider elections going forward, and restructure so new money avoids PFICs.

The UK has its own offshore fund rules, under which gains on funds without reporting status can be taxed as income, so a portfolio of Luxembourg funds can be inefficient in both countries at once.

Is a non-wilful certification credible for an old Swiss account?

This is the judgement at the centre of every Swiss streamlined case, and it is a factual question rather than a technical one. Form 14653 requires the client to describe, in their own words and under penalty of perjury, the specific reasons for the failures. The IRS standard is negligence, inadvertence, mistake or a good-faith misunderstanding of the law.

Many Swiss accounts held by London-based US citizens have ordinary histories: opened while working in Zurich or Geneva, kept after moving to London, and never reported because the client believed a UK return covered everything. Those facts can support a credible non-wilful narrative.

Other histories need more careful review before anyone signs. Factors that a specialist will want to understand, without assuming the worst, include:

Whether the client answered the foreign account question on Schedule B of past US returns, and how.
Whether the account used hold-mail or numbered-account arrangements, and why they were chosen.
How the client responded when the bank asked for US status documentation, and whether assets were moved at that point.
Whether any professional raised foreign account reporting with the client in the past and what was done in response.
The client's financial sophistication and professional background, which the IRS can take into account when assessing whether a misunderstanding was in good faith.

None of these factors is automatically disqualifying; hold-mail was common for clients who travelled. The narrative must simply be accurate, complete and consistent with the bank's records. A certification that omits awkward facts is far more dangerous than one that explains them.

What happens if the IRS has already opened an examination?

The streamlined route is closed. The IRS states on its streamlined procedures page that a taxpayer whose returns are under civil examination for any year is not eligible, whether or not the examination relates to foreign financial assets, and that a taxpayer under criminal investigation by IRS Criminal Investigation is also ineligible.

Much published guidance passes over this bar, but it has a practical edge: an examination of an unrelated matter on a past return can close the streamlined route for the Swiss account too. Anyone with an unreported Swiss account who receives IRS correspondence should have it reviewed before responding. Once an examination has begun, the issues are resolved inside it, with the examiner, so there is nothing to gain by waiting.

When is the Streamlined Foreign Offshore route the wrong one?

The Streamlined Foreign Offshore Procedures carry no miscellaneous offshore penalty. The IRS page for taxpayers residing outside the United States states that a compliant filer will not be subject to failure-to-file, failure-to-pay, accuracy-related, information return or FBAR penalties for the covered years. That protection is lost if an examination later finds that the tax non-compliance was fraudulent or that the FBAR violation was wilful. The procedures also do not provide protection from criminal prosecution.

The streamlined route is therefore not the right fit where the facts point towards wilful conduct. The IRS says that taxpayers whose failure to report was wilful, and who are concerned about criminal liability or substantial civil penalties, should consider the IRS Criminal Investigation Voluntary Disclosure Practice, described at https://www.irs.gov/compliance/criminal-investigation/irs-criminal-investigation-voluntary-disclosure-practice. That practice involves a preclearance request on Form 14457, is only available while the disclosure is timely, carries civil penalties, and does not guarantee immunity from prosecution. The IRS consulted on a proposed updated framework for the practice in late 2025, so the current terms should be checked on that page at the time of any decision.

The streamlined foreign route also fails if the non-residency test is not met. For a US citizen, the client must, in at least one of the three most recent years for which the return due date has passed, have had no US abode and have been physically outside the United States for at least 330 full days. For a married couple filing jointly, both spouses must meet the test. Most long-term London residents pass easily, but a client who split time between London and New York in the relevant years needs a day count, not an assumption.

Some clients do not need the streamlined procedures at all. A client who reported all income correctly but missed the FBARs may be able to file them late through the BSA E-Filing System with a reason for late filing. The IRS formerly published a separate named procedure for this situation, but that page was withdrawn around July 2026 and should not be relied on as a live route.

How does Swiss income affect a UK resident's HMRC position?

For a UK resident, Swiss income and gains are taxable in the UK like any other foreign income. The UK has replaced the old remittance basis, under which some residents were taxed on foreign income only when it was brought to the UK, with a residence-based regime that includes a time-limited relief for new arrivals after a long period of non-residence. The qualifying conditions and transitional rules are set out on GOV.UK and should be checked against each client's residence history.

For our typical client, a US citizen who has lived in London for many years, the practical effect is that Swiss income and gains are taxed in the UK as they arise, and they must be reported on the UK Self Assessment return. A client who previously used the remittance basis may still face UK tax when earlier Swiss income or gains are brought to the UK, depending on the transitional rules that apply to them. For the US return this matters because the UK tax paid is the main foreign tax credit against US tax on the same income, so the year in which the UK actually taxes the Swiss income affects the US credit position.

Clients sometimes ask whether a US streamlined filing creates a UK problem. It can surface one. If Swiss income was also missing from UK returns, the client should consider a disclosure to HMRC through its own disclosure facilities in parallel, since the figures produced for the IRS will reveal the gap. The two disclosures should be prepared from the same reconciled data.

Worked illustration: a London resident with a Swiss portfolio account

The following is an illustration only. All figures are invented for the example, and the exchange rate of 1 Swiss franc = 1.15 US dollars at each year-end is an assumption, not a published rate.

Ms A is a US citizen who worked in Geneva for five years and has lived in London since. While in Geneva she opened a Swiss franc account, a euro account and a custody account under a discretionary mandate. Her US returns reported only UK income, she never filed an FBAR, and a previous preparer completed Schedule B. The portfolio holds Swiss equities and six Luxembourg funds.

In the illustration year, the custody account peaked at CHF 2,400,000, the franc current account at CHF 180,000 and the euro account at EUR 95,000. The FBAR reports each account separately at its own maximum value, each converted at the year-end rate for its currency. On the assumed rate the custody account alone is about $2.76 million, well above both the FBAR threshold and the Form 8938 thresholds for a single filer living abroad.

The custody account received CHF 40,000 of Swiss dividends from which 35% Swiss withholding tax, CHF 14,000, was deducted. Ms A never filed a reclaim. On the US return we credit only the portion that is non-recoverable under the treaty that applies to her as a UK resident, after confirming that rate, and we file the Swiss reclaim for the years still within the Swiss deadline. The UK tax she paid on the same dividends is then the larger part of her foreign tax credit.

Two of the Luxembourg funds were sold during the three-year period at a gain. Each requires a Form 8621 and an excess distribution computation under the default PFIC rules, because no election was ever made. The other four funds were held throughout and require Form 8621 where the instructions call for it.

On the facts review, nothing suggested concealment: the bank held US status documents from the start, statements were posted to her London address, and the relationship manager never raised US reporting. Her narrative for Form 14653 explains the Geneva history, the preparer's handling of Schedule B and her belief that her UK returns covered the account. On that basis she was a candidate for the Streamlined Foreign Offshore Procedures, with no offshore penalty, tax and interest paid on the amended returns, and a restructured portfolio going forward.

What a complete Streamlined Foreign Offshore submission contains

The IRS page for taxpayers living abroad sets out the package. For each of the most recent three years for which the US tax return due date has passed, the client files a delinquent or amended return with all required information returns, including Form 8938 and any Form 8621 or Form 5471. For each of the most recent six years for which the FBAR due date has passed, the client files FBARs electronically through FinCEN's BSA E-Filing System, giving the Streamlined Filing Compliance Procedures as the reason for late filing. A signed Form 14653 certification is included, each return is marked Streamlined Foreign Offshore at the top of the first page, and the full tax and interest is paid with the submission. The IRS currently requires the package to be sent on paper; electronic submission of the returns is not accepted under the procedure.

Returns filed this way are not automatically audited, but the IRS says they can be selected under existing audit criteria and checked against third-party information, which for a Swiss account holder is likely to exist.

Key takeaways

IRS Streamlined Filing Experts treat a Swiss account as a facts problem first and a forms problem second: the non-wilful certification has to fit the bank's records.
Swiss institutions report US accounts under the US-Switzerland FATCA arrangement, so the IRS should be assumed to know the account exists.
Only the non-recoverable portion of the 35% Swiss withholding tax belongs in a US foreign tax credit computation.
Swiss and Luxembourg funds in a managed portfolio are usually PFICs and need Form 8621 and careful computation.
A civil examination for any year closes the streamlined route, so act before IRS contact.
The UK taxes Swiss income of a UK resident, and the UK and US computations should come from one reconciled data set.

We prepare Streamlined Foreign Offshore submissions and the matching UK Self Assessment work for US citizens in the UK. For an unreported Swiss account, the first step is a confidential facts review.