Can I use first-time penalty abatement if I have never filed a US tax return?

Generally no. First Time Abate requires that the same return type was timely filed for the prior three years, with no unreversed penalties other than the estimated tax penalty. A US person in the UK who has never filed, or who stopped filing, fails that test outright. The realistic route for a non-willful taxpayer who has never filed is the Streamlined Filing Compliance Procedures, which waives a broader set of penalties across three years of returns.

Does first-time abatement remove FBAR penalties?

No. The FBAR is a Bank Secrecy Act report filed with FinCEN, not an IRS return, so no IRS administrative waiver reaches it. First Time Abate and the new Automatic Exemption from Penalty cover only failure to file, failure to pay and failure to deposit. Delinquent FBARs are filed electronically through the FinCEN BSA E-Filing System at bsaefiling.fincen.gov with a reason for late filing selected, or as part of a streamlined submission.

Will the IRS abate interest if it abates my penalties?

Only the interest attaching to the abated penalty. The IRS states that it does not remove or reduce interest for reasonable cause or as first-time relief, and that underpayment interest accrues from the due date until the balance is paid in full. The single narrow exception is interest caused by an unreasonable error or delay by an IRS officer or employee. Interest on the underpaid tax itself remains payable, including under streamlined.

What is the Automatic Exemption from Penalty and does it affect me?

AEP is the IRS replacement for First Time Abate, announced in July 2026 and applied automatically during original return processing rather than on request. It covers the same three penalties and the same clean three-year compliance history. First Time Abate still applies to 2025 and prior tax years, while AEP replaces it for eligible original returns with original due dates on or after 1 January 2027. No form or request is required.

Is HMRC's reasonable excuse the same as IRS reasonable cause?

No, and they diverge on a point that matters. HMRC accepts, among other grounds, being unaware of or misunderstanding a legal obligation, and relying on someone else to submit a return where they failed to do so. The IRS position is that responsibility for meeting tax obligations cannot be delegated, and that ignorance of the law supports reasonable cause only alongside other facts. A successful UK appeal argument should not be reused in a US abatement request.

Can I claim reasonable cause for a late Form 5471 or Form 8938?

Sometimes. The IRS confirms that it may remove or reduce some international information reporting penalties where you acted in good faith and can show reasonable cause, but also states that not all such penalties qualify. Because these penalties commonly start at 10,000 dollars per failure with continuation penalties on top, and because no administrative waiver reaches them, they are usually the single strongest argument for using the streamlined procedures where you are eligible.

First-Time Penalty Abatement on Late US Returns

First-time penalty abatement can remove the failure-to-file and failure-to-pay penalties on missed US tax returns, but only for a taxpayer whose three preceding years were timely filed and penalty-free, which is precisely the condition most UK-resident US persons who have fallen behind cannot satisfy. That single point decides the strategy in the majority of catch-up cases we prepare, and it is the point almost every published guide skips.

The short answer is this. If you are a US citizen or green card holder living in the UK who simply never filed, or stopped filing years ago, the route that actually protects you is the Streamlined Filing Compliance Procedures, because taxpayers who properly comply with those procedures are not subject to failure-to-file and failure-to-pay penalties, accuracy-related penalties, information return penalties or FBAR penalties in the first place. First Time Abate is the fallback for a different person entirely: someone already inside the US system, with a clean recent record, who has one bad year. Confusing the two costs money.

There is also a 2026 change that most UK-based advisers have not yet absorbed. The IRS is replacing First Time Abate with an Automatic Exemption from Penalty, applied by the system rather than requested by the taxpayer. That changes the tactical calculus for anyone deciding which year to spend their one clean-history waiver on. Details are on irs.gov/newsroom/automatic-exemption-from-penalty-what-taxpayers-should-know.

What is first-time penalty abatement on missed US tax returns?

First Time Abate is an administrative waiver, not a statutory right and not a judgment about your excuse. It removes certain penalties purely because your recent compliance record is clean. The IRS describes it as the most common administrative relief for individuals and businesses with a history of timely compliance, and sets out the conditions at irs.gov/payments/administrative-penalty-relief.

The compliance-history conditions the IRS publishes are narrow and mechanical:

The same return type, as the original return, was timely filed for the prior three years, or the prior 12 consecutive quarters for quarterly filers.
For those prior years, either no penalty was assessed, ignoring the estimated tax penalty, or a penalty was assessed but later abated for reasonable cause or IRS error.
For business filers, the IRS did not waive the failure to deposit penalty four or more times during the prior three years, and the failure to deposit penalty was not charged for avoidance of the Electronic Federal Tax Payment System.
In practice the relief is applied against an account where the delinquent return itself has now been filed, or a valid extension was in place, and the balance owing has been paid or brought under a payment arrangement, because the failure-to-pay penalty keeps accruing until the tax is paid in full.

Read the first condition again, because it is the one that disqualifies most people who search for this topic. A US person in the UK who has not filed since, say, 2019 does not have three preceding years of timely filed Forms 1040. The waiver is unavailable, no matter how sympathetic the story. In the returns we prepare, the taxpayers who genuinely qualify for First Time Abate are people who have always filed from London on time and then missed a single year through a house move, a hospital stay or an adviser handover. Everyone else needs a different instrument.

The 2026 change: Automatic Exemption from Penalty replaces First Time Abate

On 8 July 2026 the IRS announced the Automatic Exemption from Penalty, known as AEP. It recognises the same clean three-year history but the IRS applies it during original return processing when the taxpayer qualifies, with no application, form or separate request required, and issues a notice confirming that relief was granted. The announcement is at irs.gov/newsroom/irs-simplifies-penalty-relief-introduces-automatic-process-for-eligible-taxpayers.

The transition matters for anyone filing late returns now:

First Time Abate continues to apply to 2025 and prior tax years, and to 2026 and prior quarterly returns.
AEP begins in summer 2026 and applies to eligible original returns beginning with tax year 2025 and 2026 quarterly returns, and to future tax periods.
For eligible original returns with original due dates on or after 1 January 2027, First Time Abate will no longer be available and is replaced by AEP.
AEP covers the same three penalties as First Time Abate: failure to file, failure to pay and failure to deposit. It does not cover the daily delinquency penalty, accuracy-related penalties or information return penalties.
Taxpayers who do not qualify for AEP can still request penalty relief based on reasonable cause, which the IRS reviews and decides case by case.

The strategic consequence is easy to miss. When relief was requested, you controlled which year it was spent on. When relief is applied automatically at processing, the system decides, and it will generally spend the waiver on the first qualifying year it processes, even if the penalty in that year is trivial and a much larger penalty is coming in the next one. The National Taxpayer Advocate has flagged exactly this concern in its commentary on the rollout at taxpayeradvocate.irs.gov. For a UK-resident filer submitting several years at once, the sequencing of what you file, and under which programme, is now a live planning decision rather than an afterthought.

Which penalties the waiver covers, and which it never touches

First Time Abate and AEP are limited to three penalties: failure to file under IRC 6651(a)(1), 6698(a)(1) and 6699(a)(1); failure to pay under IRC 6651(a)(2) and (a)(3); and failure to deposit under IRC 6656. Everything else is outside the waiver. The IRS expressly excludes returns filed once or infrequently, meaning event-based filing requirements, the daily delinquency penalty for exempt organisations, and information reporting that depends on another filing.

That last exclusion is the one that bites cross-border clients. The international information returns that a UK-resident US person most often misses, and which carry the largest penalties, are exactly the filings that hang off the Form 1040. Penalties for Form 5471, Form 8938, Form 5472, Form 8865 and related filings are described at irs.gov/payments/international-information-reporting-penalties, where the IRS notes that initial penalties commonly start at 10,000 dollars per failure and that continuation penalties can increase until a complete and correct return is filed. No first-time waiver removes those. Reasonable cause may, for some of them, and the IRS is explicit that not all international information reporting penalties qualify for reasonable cause relief.

FBAR is a separate world again. The FBAR is a Bank Secrecy Act filing made to FinCEN, not an IRS return, so no IRS administrative waiver reaches it. Delinquent FBARs are filed electronically through the FinCEN BSA E-Filing System at bsaefiling.fincen.gov, selecting the appropriate reason for late filing, or they are included in a streamlined submission. Anyone who tells you there is a named IRS delinquent FBAR procedure to point at is working from an out-of-date page.

Reasonable cause is the broader route, and a different test

Reasonable cause is wider than the administrative waiver. Per irs.gov/payments/penalty-relief-for-reasonable-cause, it can reach failure to file, failure to pay, accuracy-related penalties and information return penalties, though it does not apply to certain penalties such as the estimated tax penalty. The standard, set out in the Internal Revenue Manual at irs.gov/irm/part20/irm_20-001-001r, is whether the taxpayer exercised ordinary business care and prudence in determining their tax obligations but was nevertheless unable to comply.

What the IRS actually weighs, and what a strong submission therefore has to establish:

The specific reason the return or payment was late, tied to precise dates, and the direct causal link between that reason and the failure.
Whether the taxpayer exercised ordinary care and prudence and was still unable to comply on time.
For accuracy-related penalties, the effort made to report the correct tax, the complexity of the issue, the taxpayer's knowledge and experience, and the steps taken to understand the obligation or to seek help.
Documentary proof, such as hospital or court records or a doctor's letter confirming illness with dates, evidence of fire, flood, theft or natural disaster, and copies of relevant correspondence and responses.
Whether the taxpayer complied within a reasonable period once the circumstances that caused the failure ceased to exist. The Manual is explicit that reasonable cause does not exist where the taxpayer failed to act promptly after the obstacle cleared.
Ignorance of the law can support reasonable cause only in conjunction with other facts, where a reasonable and good faith effort to comply was made, or the taxpayer could not reasonably have been expected to know of the requirement. It is never presumed.

There is an ordering rule practitioners should know. The Internal Revenue Manual directs that penalty relief under administrative waivers, including First Time Abate, is considered and applied before reasonable cause. If you write a detailed reasonable cause letter for a year where you also happen to satisfy the clean-history test, the IRS will abate on the waiver and tell you it did so because of your compliance history, not because of your explanation. Your reasonable cause narrative goes unused, and your once-per-clean-history waiver is gone.

Does relying on an accountant count as reasonable cause?

Sometimes, and the distinction is genuinely fine. The consistent principle in the Manual is that the taxpayer is responsible for meeting their tax obligations and that responsibility cannot be delegated. Handing your papers to a UK accountant and assuming the US return got filed is, on its own, a weak position. Reliance on professional advice tends to carry more weight when the question was substantive and genuinely difficult, when the adviser was competent in the relevant area, when the taxpayer gave the adviser complete and accurate information, and when the taxpayer actually relied in good faith on the advice given. It carries least weight when the failure was purely ministerial, such as missing a deadline that anyone could see.

For UK-resident clients this cuts a specific way. A taxpayer who engaged a UK-only accountant who never raised US filing obligations at all is on more promising ground when the argument is framed as a good faith effort to obtain competent advice about a genuinely complex cross-border position, supported by dated engagement letters and correspondence, than when it is framed as blaming the accountant for a missed deadline.

How do you request penalty relief in practice?

There are three routes, set out at irs.gov/payments/penalty-relief. First, by telephone, using the number in the top right corner of the notice or letter, with the notice and any documentation in front of you. Some relief requests are accepted on the call. Second, in writing, by sending a signed statement explaining the position and enclosing the notice. Third, on Form 843, Claim for Refund and Request for Abatement, described at irs.gov/forms-pubs/about-form-843, which is used to claim a refund or request an abatement of certain taxes, interest, penalties, fees and additions to tax, sent to the address specified in the Form 843 instructions. File a separate Form 843 for each tax period and each type of fee or penalty. Note that Form 843 is not the vehicle for requesting abatement of income tax itself.

A useful detail for First Time Abate specifically: the IRS confirms you do not need to name FTA as the relief sought or supply supporting documents, because the IRS reviews your account history directly. That is the opposite of a reasonable cause claim, which lives or dies on the documents you attach.

Why a streamlined-eligible filer should usually not chase first-time abatement

This is the point that separates a competent catch-up from an expensive one. Under the Streamlined Foreign Offshore Procedures, described at irs.gov/individuals/international-taxpayers/us-taxpayers-residing-outside-the-united-states, an eligible taxpayer files delinquent or amended returns for the most recent three years for which the due date has passed, files any delinquent FBARs for the most recent six years, and certifies non-willfulness on Form 14653. The IRS states that taxpayers who comply will not be subject to failure-to-file and failure-to-pay penalties, accuracy-related penalties, information return penalties, or FBAR penalties. For a US person living in the UK who meets the non-residency requirement, there is also no miscellaneous offshore penalty.

Compare that to what First Time Abate delivers. Streamlined removes four categories of penalty, including the international information return penalties that carry the largest exposure, across three years of returns and six years of FBARs. First Time Abate removes two of those categories, for one year, and only if your record is already clean. If you are streamlined-eligible, pursuing first-time abatement separately is almost always the wrong move, for three reasons.

Streamlined already waives the penalties that FTA would waive, so there is nothing left for the waiver to do on those years.
Spending the waiver on an earlier year consumes the clean-history condition. A penalty abated under an administrative waiver is not a penalty abated for reasonable cause or IRS error, so it does not preserve your record for the three-year lookback in the way a reasonable cause abatement does.
Under AEP the waiver may be applied automatically at processing without you choosing it, so the sequencing of which returns you submit, and whether they go in as a streamlined package or as loose delinquent returns, now determines where the benefit lands.

There is a hard eligibility boundary worth stating plainly. Per irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures, taxpayers under IRS civil examination are ineligible for the streamlined procedures, regardless of whether the examination relates to undisclosed foreign financial assets, as are taxpayers under criminal investigation. Every return must carry a valid taxpayer identification number, and submitted returns remain subject to normal audit selection. Once an examination has opened, streamlined is off the table and penalty relief arguments, including first-time abatement and reasonable cause, become the remaining tools. That is the fact pattern in which first-time abatement genuinely earns its place.

Interest is not abated, even when the penalties are

Clients consistently assume that winning penalty relief clears the account. It does not. The IRS states at irs.gov/payments/interest that underpayment interest is charged from the due date of the amount owed and continues to accrue until the balance is paid in full, and, critically, that the IRS does not remove or reduce interest for reasonable cause or as first-time relief. The only narrow exception is interest applied because of an unreasonable error or delay by an IRS officer or employee.

What does get removed is the interest attaching to an abated penalty. Reduce or remove a penalty, and the related interest on that penalty is automatically reduced or removed with it. Interest on the underpaid tax itself survives. Two further points for UK-resident filers. Interest runs from the regular April due date even where the automatic two-month extension to 15 June applies to US citizens and resident aliens abroad, as confirmed at irs.gov/individuals/international-taxpayers/us-citizens-and-resident-aliens-abroad. And streamlined does not waive interest either. It waives penalties. Tax and interest are still due with the submission.

Building a UK reasonable cause narrative on documented record recovery

Where reasonable cause is the live route, the narrative that works for a UK-resident US person is rarely a dramatic one. It is a documented account of why the records needed to prepare a correct US return were genuinely difficult to assemble, and what was done about it. Vague assertions that UK statements were hard to obtain achieve nothing. Dated evidence of a sustained effort does real work.

Dated written requests to UK banks and building societies for historic statements, and the institutions' replies, including refusals, retention-limit responses and fees quoted for archived records.
Evidence of accounts held at institutions that have since merged, rebranded or closed, where the historic account data no longer sits with an identifiable provider.
Employer and pension correspondence needed to reconstruct UK earnings and contributions across the relevant tax years, including P60 and P45 replacement requests.
HMRC records obtained to fix the UK tax position on which foreign tax credit calculations depend, with the dates on which they were requested and received.
The UK tax year running to 5 April against the US calendar year, and the reconstruction work that mismatch required for each year in the package.
A clear timeline showing the date the taxpayer became aware of the US obligation and the date professional help was engaged, demonstrating that compliance followed within a reasonable period once the position was understood.

That last item is the one that decides borderline cases. The Manual is explicit that reasonable cause fails where the taxpayer did not comply within a reasonable period after the obstacle ceased. A file showing eighteen months between discovering the obligation and doing anything about it undermines the whole submission, however good the record-recovery evidence is.

A worked scenario: a UK-resident US citizen three years behind

The following figures are illustrative only and assume an exchange rate of 1.27 US dollars to the pound for the purpose of the example. Assume a US citizen resident in London, physically outside the United States for the whole of each relevant year, with no US abode, who last filed a Form 1040 several years ago. She holds a UK current account and an ISA, together over the FBAR threshold, and a 15 per cent shareholding in her employer's UK trading company that she has never reported.

Route one, delinquent filing with a penalty relief request. She files three late Forms 1040. Failure to file runs at 5 per cent of the tax due per month or part month up to 25 per cent, and where a return is more than 60 days late a minimum penalty applies, being the lesser of an indexed amount or 100 per cent of the underpayment, as set out at irs.gov/payments/failure-to-file-penalty. Failure to pay runs at 0.5 per cent per month up to 25 per cent, per irs.gov/payments/failure-to-pay-penalty, and the failure to file penalty is reduced by the failure to pay penalty applied in the same month. First Time Abate is unavailable, because the three preceding years were not timely filed. The shareholding may trigger an information return penalty that no administrative waiver reaches. Interest runs on everything from the original due dates.

Route two, streamlined foreign offshore. She files three years of returns and six years of FBARs, certifies non-willfulness on Form 14653, and pays the tax and interest shown. Per the IRS, she is not subject to failure-to-file or failure-to-pay penalties, accuracy-related penalties, information return penalties or FBAR penalties, and as a qualifying non-resident there is no miscellaneous offshore penalty. The information return exposure on the shareholding, which is the largest single number in route one, is inside the waiver. Interest on the underpaid tax is payable in both routes and is not abated in either.

The comparison is not close, and it does not turn on the size of the income tax liability. It turns on which penalties each route reaches.

The UK side: HMRC reasonable excuse is a separate test

Nothing agreed with the IRS binds HMRC. If the same client also has a UK Self Assessment problem, that is a parallel matter with its own penalty regime and its own relief test. Self Assessment late filing penalties, set out at gov.uk/self-assessment-tax-returns/penalties, start with an initial 100 pound penalty, followed after three months by daily penalties of 10 pounds per day up to a maximum of 900 pounds, then further penalties at six and twelve months of 5 per cent of the tax due or 300 pounds, whichever is greater. Late payment penalties apply at 30 days, six months and twelve months, and interest is charged on the amount owed.

HMRC's reasonable excuse test, at gov.uk/tax-appeals/reasonable-excuses, is not the same as the IRS reasonable cause standard, and in some respects is more forgiving. HMRC lists as acceptable the death of a partner or close relative shortly before the deadline, an unexpected hospital stay, serious or life-threatening illness, computer or software failure while preparing the return, problems with HMRC online services, fire, flood or theft, unpredictable postal delays, delays related to a disability or mental illness, and, notably, being unaware of or misunderstanding a legal obligation, or relying on someone else to submit a return where they failed to do so. HMRC does not accept insufficient funds, finding the system difficult to use, not receiving a reminder, or a mistake on the return. As with the IRS, the return or payment must follow as soon as you are able.

The practical consequence is that an argument which succeeds with HMRC, such as reliance on an agent who did not file, is materially weaker with the IRS, where the responsibility to meet the obligation cannot be delegated. Do not recycle a UK appeal letter into a US abatement request.

The order of operations we use on missed US tax returns

In the returns we prepare, the sequence is always the same. Establish first whether a civil examination or criminal investigation is open, because that closes the streamlined door and reshapes everything. Then test streamlined eligibility, including the non-residency requirement, which for a US citizen or lawful permanent resident means no US abode and physical presence outside the United States for at least 330 full days in the relevant year, and an honest assessment of non-willfulness. Only if streamlined is unavailable do we look at the administrative waiver, and then only after confirming the three preceding years were timely filed and penalty-free.

Where the waiver is unavailable, reasonable cause is built as a documented file rather than a letter, with the record-recovery evidence, the timeline of discovery and engagement, and separate treatment for any international information return penalties, which have their own relief limits. Interest is budgeted for from the outset in every scenario, because it is not going away. And with AEP now applied automatically at processing, the sequence in which returns are submitted is decided before anything is filed, not after the notices arrive.

The failure mode we see most often is a taxpayer who files three late returns on their own, receives penalty notices, then writes a heartfelt reasonable cause letter, and only afterwards discovers that a streamlined submission would have removed a far larger information return penalty they had not even identified yet. Penalty relief is the last step in the plan, not the plan itself.