Can I claim innocent spouse relief if we never filed the US returns at all?

Not for the unfiled years. Section 6015 relief attaches to a joint return that was actually made, so where no return exists there is no joint and several liability to be relieved. The returns have to be filed first, potentially through the Streamlined Filing Compliance Procedures. Note that filing jointly to catch up creates the joint and several liability itself, so pricing married filing separately for the delinquent years is worth doing before signatures are collected.

Does innocent spouse relief cover FBAR penalties on UK accounts?

No. Section 6015 relieves joint and several liability for income tax, interest and related penalties on a joint income tax return. The FBAR is a separate individual report filed with FinCEN through the BSA E-Filing System, not with your tax return, and the obligation attaches to each person with a financial interest in or signature authority over the account. Relief from the joint income tax liability therefore does not reach an FBAR penalty assessed against that same person.

Will the IRS tell my spouse that I have filed Form 8857?

Yes, and there is no way to prevent it. The Form 8857 instructions state that by law the IRS must contact your spouse or former spouse, with no exceptions, even for victims of spousal abuse or domestic violence. The IRS will not disclose your current name, address, telephone numbers, or details of your employer, income or assets, but other information used in the determination may be shared. Your spouse is also given the chance to participate in the process.

We are still married and living together in London. Which route applies?

Separation of liability under section 6015(c) is unavailable, because it requires that you are divorced, legally separated, or were not a member of the same household at any time during the twelve months ending on the date you file. An intact cohabiting couple must therefore rely on traditional relief under section 6015(b), which covers understatements only, or equitable relief under section 6015(f), which is the only route that also reaches tax correctly reported but never paid.

What is the deadline for filing Form 8857?

For relief under section 6015(b) and the section 6015(c) election, the request must be filed no later than two years after the first IRS attempt to collect the tax from you. Collection activity starts the clock, not the assessment or the audit notice. Equitable relief under section 6015(f) is different: where a balance is still owed the request must fall within the IRS ten-year collection period, and where a credit or refund is sought, within three years of filing or two years after payment, whichever is later.

Does HMRC offer anything equivalent for a UK spouse?

No, because the UK taxes married individuals independently and has no joint return. HMRC assesses each spouse only on their own income under Self Assessment, so no equivalent to joint and several liability arises and no relief from it is needed. The useful consequence is that UK records, including individual SA302 calculations, PAYE coding notices and sole-name bank statements, are naturally kept per person and make strong evidence for a US section 6015 knowledge argument.

Innocent Spouse Relief for US Filers in the UK

Anyone researching missed US tax returns innocent spouse relief usually arrives from the same place: a joint Form 1040 signed years ago without being read, income that sat quietly in UK accounts in the other spouse's sole name, and a notice from the IRS addressed to both of you. The direct answer is that a joint US return makes both spouses jointly and severally liable for the entire tax, interest and penalties for that year, and section 6015 of the Internal Revenue Code is the only statutory route out of that liability. It is requested on Form 8857, it comes in three distinct flavours, and it does not touch an FBAR penalty. For US-UK households where one spouse runs the UK company, the UK investment accounts and the HMRC filings while the other simply signs, those four facts decide the outcome.

What Joint and Several Liability Actually Means on a Joint US Return

Joint and several liability means the IRS can collect one hundred percent of the assessed tax from either spouse, in any proportion it chooses, regardless of who earned the income or who caused the error. It is not a fifty-fifty split. If your spouse's UK consultancy profits were understated by a substantial amount and the deficiency lands, the IRS can pursue the whole balance against you alone, including from your separate UK salary, your separate UK bank accounts and any US-situs assets you hold. A divorce settlement or a UK separation agreement that allocates the tax to your former spouse binds the two of you as a matter of contract. It does not bind the IRS, and the IRS is not a party to it.

This is the structural difference that catches cross-border couples out. The United Kingdom taxes individuals separately. There is no joint return in the UK system, and each spouse files their own Self Assessment return under the timetable published at https://www.gov.uk/self-assessment-tax-returns/deadlines, with registration by 5 October, paper returns by 31 October and online returns plus payment by 31 January. A British spouse who has never encountered a joint return has no intuition that signing one creates personal exposure to the other person's entire tax position. In the returns we prepare, the non-earning or non-managing spouse is very often the one who has never seen a UK bank statement, never logged into the UK brokerage platform and never asked what the numbers on page one of the 1040 were built from.

The Three Routes Out Under Section 6015

Section 6015 contains three separate relief provisions. You do not have to nominate one. The IRS explains at https://www.irs.gov/individuals/innocent-spouse-relief that it considers all three when you file Form 8857. In practice the analysis still matters, because the conditions and the available remedies differ sharply, and the evidence you assemble should be built for the route that actually fits.

Traditional innocent spouse relief under section 6015(b) is the classic route. The statutory conditions require that a joint return was made for the year, that there is an understatement of tax attributable to erroneous items of one spouse, that the other spouse establishes that in signing the return he or she did not know and had no reason to know that the understatement existed, that taking into account all the facts and circumstances it is inequitable to hold that spouse liable, and that the election is made not later than two years after the date the IRS began collection activities. Publication 971, at https://www.irs.gov/publications/p971, defines erroneous items as unreported income or an incorrect deduction, credit or basis attributable to your spouse, and defines the knowledge test as covering both what you actually knew and what a reasonable person in similar circumstances would have known.

Separation of liability under section 6015(c) is an election rather than a plea. It splits the understated tax between the spouses as though separate returns had been filed, and it is available only where, at the time the election is filed, you are no longer married to or are legally separated from the other spouse, or you were not a member of the same household at any time during the twelve-month period ending on the date the election is filed. Two limits matter enormously for wealthy cross-border couples. First, an intact marriage cannot use it at all, which pushes most still-married US-UK households onto 6015(b) or 6015(f). Second, section 6015(g) provides that no credit or refund is allowed as a result of a 6015(c) election, so a spouse who has already paid recovers nothing under this route even if the election succeeds. The IRS can also defeat the election for any item it demonstrates you had actual knowledge of at the time you signed.

Equitable relief under section 6015(f) is the catch-all. It applies where relief is not available under (b) or (c) and where, taking into account all the facts and circumstances, it is inequitable to hold you liable for an unpaid tax or a deficiency. Crucially, it is the only one of the three that reaches an underpayment, meaning tax correctly reported on the return but never actually paid. Revenue Procedure 2013-34, published at https://www.irs.gov/pub/irs-drop/rp-13-34.pdf, sets out seven threshold conditions, then allows a streamlined determination where the requesting spouse is no longer married, would suffer economic hardship without relief, and did not know of the item giving rise to the liability. Where the streamlined test is not met, the IRS weighs a non-exclusive list of factors.

Section 6015(b): understatements only, marriage may be intact, refunds available, two-year deadline from first collection activity.
Section 6015(c): understatements only, requires divorce, legal separation or twelve months living apart, no refunds, two-year deadline.
Section 6015(f): understatements and underpayments, marriage may be intact, refunds available within the normal limits, deadline tied to the collection period or the refund claim window.
All three require that a joint return was actually made for the year in question.
The IRS considers all three routes from a single Form 8857, so a claim is not lost by naming the wrong subsection.

How Missed US Tax Returns Innocent Spouse Relief Works When Nothing Was Ever Filed

This is the point that no general innocent spouse page addresses, and it reverses the normal order of operations. Section 6015 relief attaches to a joint return that was made. Where a US-UK household has simply never filed, or has years missing, there is no joint return for those years, no joint and several liability yet, and therefore nothing for Form 8857 to relieve. The relief cannot be used as a shield against a filing failure. It only operates once the returns exist.

The practical consequence is uncomfortable but important. If the household now brings itself current by filing joint returns, whether through the Streamlined Filing Compliance Procedures or otherwise, it is creating the very joint and several liability that the other spouse may later need section 6015 to escape. Where one spouse genuinely has no visibility of the other's UK income, filing married filing separately for the delinquent years is worth pricing before the joint returns are signed. Separate returns carry a real cost in rates and credits, and they are not always the right answer, but they cap each spouse's exposure at their own tax. That comparison should be run before signatures are collected, not afterwards.

Filing Form 8857, the Deadlines, and the Notice the IRS Must Send Your Spouse

Form 8857, Request for Innocent Spouse Relief, is a standalone filing. It is not attached to a tax return. The current revision is June 2021, and the form and instructions are published at https://www.irs.gov/forms-pubs/about-form-8857. Per the instructions at https://www.irs.gov/instructions/i8857, it is mailed to Internal Revenue Service, P.O. Box 120053, Covington, KY 41012 for United States Postal Service delivery, or to Internal Revenue Service, 7940 Kentucky Drive, Stop 840F, Florence, KY 41042 for private delivery services, or faxed to 855-233-8558. For a family in London using an international courier, the Florence address is the correct one.

The deadlines are unforgiving and they differ by route. For relief under 6015(b) and for the 6015(c) election, the request must be filed no later than two years after the first IRS attempt to collect the tax from you. Collection activity, not the assessment and not the audit letter, starts that clock. For equitable relief under 6015(f), the instructions provide that where a balance is still owed the request must come within the IRS ten-year collection period, and where you are seeking a credit or refund it must come within three years of filing the return or two years after paying the tax, whichever is later.

Two procedural features deserve advance thought. While a relief request is pending, the IRS cannot collect from you for that year, but interest and penalties continue to accrue on the balance. And by law the IRS must contact your spouse or former spouse. The instructions state there are no exceptions to this, even for victims of spousal abuse or domestic violence, and the Internal Revenue Manual at https://www.irs.gov/irm/part25/irm_25-015-001 confirms that for all relief requests filed the non-requesting spouse must be notified and given an opportunity to submit information relevant to the request. The IRS does undertake not to disclose your current name, address, telephone numbers, or information about your employer, your income or your assets. Other information used in reaching the determination may be shared. If the household is still living together in the same house in Kensington, that letter will arrive, and the timing of the Form 8857 needs to be planned around that reality rather than discovered afterwards.

If the IRS denies the request, section 6015(e) allows a petition to the United States Tax Court. The petition may be filed after the earlier of the date the IRS mails its final determination or six months after the election was filed, and no later than the close of the ninetieth day after the final determination notice. The Tax Court must give the non-requesting spouse adequate notice and an opportunity to become a party to the proceeding, so the other spouse can appear and argue against your relief.

Why Innocent Spouse Relief Does Not Reach an FBAR Penalty

This is the single largest blind spot in the general innocent spouse material, and it matters more to US-UK households than to almost anyone else. Section 6015 relieves joint and several liability for income tax, together with the related penalties and interest, arising from a joint income tax return. The FBAR is a different creature entirely. It is a Bank Secrecy Act report filed with the Financial Crimes Enforcement Network, not with the IRS, and not with your tax return. The IRS page at https://www.irs.gov/businesses/small-businesses-self-employed/report-of-foreign-bank-and-financial-accounts-fbar states that a US person must file where the aggregate value of foreign financial accounts exceeded 10,000 dollars at any time during the calendar year, that the report is due 15 April with an automatic extension to 15 October, and that it must be filed electronically through the BSA E-Filing System and is not filed with the federal tax return.

The FBAR obligation runs to the individual person with the financial interest in or signature authority over the account. There is a narrow concession allowing spouses to file a single FBAR, but the IRS conditions it tightly: all of the reportable accounts of the non-filing spouse must be jointly owned with the filing spouse, FinCEN Form 114a must be completed authorising the filing, and the filing spouse must report the jointly owned accounts on a timely filed, signed FBAR. That concession collapses in precisely the fact pattern this article addresses. Where one spouse holds a UK brokerage account, a UK business current account or an offshore deposit in their sole name, the couple cannot file a single FBAR, and each spouse's own report stands or falls alone. Because the report is individual and sits outside the income tax joint return, section 6015 relief from the joint income tax liability does not reach an FBAR penalty assessed against that person. Late FBARs are filed through the BSA E-Filing System with a reason for late filing selected, or brought in through the Streamlined Filing Compliance Procedures.

The same logic applies to Form 8938, the FATCA statement of specified foreign financial assets, which is filed with the income tax return but carries its own penalty regime. The reporting thresholds published at https://www.irs.gov/businesses/corporations/summary-of-fatca-reporting-for-us-taxpayers for taxpayers living abroad and filing jointly are more than 400,000 dollars on the last day of the tax year or more than 600,000 dollars at any time during the year. The same page confirms that Form 8938 does not relieve anyone of the FBAR filing requirement.

The Streamlined Certification Can Quietly Destroy a Section 6015 Claim

Households with missed returns and missed FBARs usually look first at the Streamlined Filing Compliance Procedures. The eligibility rules at https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures require certification that the failure to report all income, pay all tax and submit all required information returns, including FBARs, was due to non-willful conduct, defined as conduct due to negligence, inadvertence or mistake, or conduct that is the result of a good faith misunderstanding of the requirements of the law. A taxpayer already under civil examination for any year is not eligible, whatever that examination concerns. For the foreign version, the page at https://www.irs.gov/individuals/international-taxpayers/us-taxpayers-residing-outside-the-united-states sets out the non-residency requirement, being no US abode and at least 330 full days physically outside the United States in one or more of the most recent three years, requires three years of returns and six years of FBARs, and confirms that both spouses must meet the applicable non-residency requirement on a joint filing. Compliant filers are not subject to failure-to-file and failure-to-pay penalties, accuracy-related penalties, information return penalties, or FBAR penalties.

Here is the collision. The Form 14653 certification requires a narrative statement of facts, and the IRS frequently asked questions page for taxpayers residing outside the United States instructs filers to give specific reasons for the failure, to include the whole story with both favourable and unfavourable facts, and to describe their contacts with the foreign accounts including withdrawals, deposits and management decisions. That is the same evidence, written by you, under penalties of perjury, that an IRS examiner will later read when testing whether you knew or had reason to know about the item on the joint return. A narrative drafted to establish one spouse's non-willfulness by describing shared household use of a UK account can be the document that defeats the other spouse's later section 6015 claim.

The same FAQ page provides two mechanisms that are worth knowing about in advance. Where married taxpayers submitting a joint certification have different reasons for the failure, they must provide the individual reasons for each spouse separately in the statement of facts, which is the mechanism for preserving one spouse's genuine lack of knowledge on the record rather than blurring it into a single household narrative. And where a spouse will not sign a joint amended return or joint Form 14653, for example on separation or divorce, the answer to FAQ 7 allows a joint amended return to be submitted with only one signature provided it shows a net increase in tax, with the inability to obtain the signature explained in the narrative and SFO FAQ 7 written in red ink where the signature would go. That route is not available where the return shows a net decrease in tax or an increase in credit.

Proving You Had No Reason to Know About a UK Account

The knowledge test is where most claims are actually won or lost, and it is an evidential problem before it is a legal one. The standard is not simply whether you knew. It is whether a reasonable person in similar circumstances would have known. The IRS looks at your education and business experience, your involvement in the activity that produced the erroneous item, whether the item represented a departure from a recurring pattern in earlier years, whether you were given a reason not to enquire, and whether the family's standard of living changed in a way that should have prompted a question. A US spouse who is a former investment banker will be held to a different standard of enquiry than one who has never worked in finance, and that asymmetry is real.

In cross-border cases the useful evidence is almost all British, and it is documentary. The point is to show, from records neither spouse controls, that the money and the information genuinely sat on one side of the household.

UK bank and building society statements showing sole-name rather than joint account structure, and showing that no transfers from the undisclosed account reached the joint household account.
Companies House filings, confirmation statements and accounts showing sole directorship and sole shareholding in the UK company that generated the income.
HMRC Self Assessment records, SA302 tax calculations and PAYE coding notices for each spouse separately, which the UK system produces on an individual basis and which show what each person's own declared income was.
The UK institution's own correspondence records, showing which spouse was the registered contact, which address statements went to, and who held online banking credentials.
Household evidence of the actual money arrangements: a fixed monthly housekeeping transfer, a joint account funded only by salary, standing orders, and the absence of any change in lifestyle matching the missing income.
Prior years' US returns showing that the item was a departure from an established pattern rather than a continuation of one.

The failure mode we see most often is the opposite of what people expect. It is not that the spouse knew. It is that the household cannot produce UK records old enough to prove that they did not. UK banks and platforms do not retain statements indefinitely, and a request for ten-year-old sole-name records made after an IRS notice has landed is often too late. Where a claim is even a possibility, the record-gathering should start immediately.

A Worked Scenario

The following is an illustration only, and the figures are assumed rather than drawn from an actual case. Take a couple resident in London. One spouse is a US citizen who works in-house at a UK bank and is taxed through PAYE. The other spouse is a dual citizen who owns a UK consultancy company, holds the company's accounts and a UK investment portfolio in sole name, and prepares the family's US returns. Joint Forms 1040 were signed for several years. The consultancy's retained profits and the portfolio's dividends were never reported on the US returns, and no FBAR was ever filed by either spouse. An IRS notice arrives proposing a deficiency for three years, addressed to both.

The sequencing question is which problem to solve first. The deficiency is an income tax liability on a joint return, so section 6015 is available to the PAYE spouse in principle. The marriage is intact and the couple live together, so 6015(c) is unavailable and the claim runs on 6015(b) and 6015(f). Because an examination has been proposed, the streamlined route is off the table for the years under examination. The missing FBARs remain each spouse's own individual problem: a successful Form 8857 for the PAYE spouse removes that person's share of the income tax, interest and related penalties, and does nothing at all about an FBAR penalty assessed against the same person for their own signature authority on a joint household account. That is the split most households do not anticipate, and it is why the FBAR position has to be scoped separately from the first meeting.

What Section 6015 Relief Does Not Cover

Publication 971 sets out categories where relief is simply unavailable, and they are worth confirming early rather than discovering after a Form 8857 has been filed.

Transferee liability under federal or state law, which is a separate collection theory rather than joint return liability.
Liabilities already settled through an offer in compromise or certain closing agreements.
Years for which a court has already decided the relief question against you.
Any year for which you knowingly participated in filing a fraudulent joint return.
Property transferred between spouses as part of a fraudulent scheme to defraud the IRS or another third party; for separation of liability, a transfer from your spouse to you within one year before a deficiency notice is presumed to be for tax avoidance unless ordered by a divorce decree or otherwise disproved.
The FBAR, which is an individual report filed with FinCEN through the BSA E-Filing System rather than a liability on the joint income tax return.

It is also worth separating innocent spouse relief from injured spouse allocation, which is a different form entirely and answers a different question. Injured spouse allocation is about protecting your share of a joint refund from being offset against your spouse's separate debt. Innocent spouse relief is about being removed from liability for the tax itself. Households abroad who ask about one frequently mean the other.

Does the UK Have an Equivalent?

No, and the reason is structural rather than a gap in UK law. Because the United Kingdom taxes individuals independently and has no joint return, HMRC never assesses one spouse for the other's income tax, so there is nothing analogous to joint and several liability to be relieved from. Each spouse's Self Assessment position, described at https://www.gov.uk/self-assessment-tax-returns, stands alone. The practical implication for a cross-border couple is that the UK side of the household's compliance is naturally documented on a per-person basis, and that individual documentation is the strongest evidence available for a US section 6015 claim. The UK system, in other words, generates exactly the separated record that the IRS knowledge test wants to see.

How We Sequence This in Practice

The order of operations decides the outcome more often than the strength of the sympathetic facts. First, establish whether a joint return was actually made for each year in issue, because that determines whether section 6015 is even on the table or whether the household is dealing with a pure delinquency problem first. Second, establish whether any collection activity has occurred and on what date, because that fixes the two-year clock for 6015(b) and 6015(c). Third, scope every FBAR and Form 8938 obligation on a per-person basis, separately from the joint income tax position, because relief on one does not travel to the other. Fourth, if a streamlined submission is contemplated, draft the statement of facts with the knowledge test already in mind, stating each spouse's reasons separately where they genuinely differ. Fifth, gather the UK documentary record before it ages out of the institutions' retention periods. Only then does the Form 8857 get drafted, and it gets drafted knowing that the IRS is legally required to send a letter to the other spouse.