Can a US citizen pilot based in the UK use the Streamlined Foreign Offshore Procedures?

Yes, if the failure to file was non-willful and the non-residency test is met. The IRS requires that in at least one of the most recent three years for which the return due date has passed, the pilot had no US abode and was physically outside the United States for at least 330 full days. Eligible filers submit three years of returns, six years of FBARs and Form 14653, and pay tax and interest without penalties.

Do US layovers count against the 330 days?

Yes. The test requires 330 full days physically outside the United States, and a full day runs for 24 consecutive hours from midnight to midnight. A one-night US layover normally touches two calendar days in US local time, so neither counts. In a 365-day year only 35 days with any US presence are available, covering rotations, training and personal visits combined.

Is a pilot's pay for flying over the Atlantic foreign earned income?

No. The IRS states that a foreign country includes its airspace and territorial waters but not airspace over international waters or the United States. Pay for duty time over international waters or in US airspace cannot be excluded on Form 2555, so the salary must be apportioned by time. Many UK-based pilots use the foreign tax credit against UK PAYE instead.

Does the US-UK tax treaty mean a UK-resident pilot's salary is taxable only in the UK?

Article 14, paragraph 3 says remuneration for employment as a member of the regular complement of an aircraft operated in international traffic is taxable only in the state of residence. For US citizens, the saving clause in Article 1, paragraph 4 lets the United States tax them as if the treaty did not exist, and Article 14 is not an exception. Filing is still required, with double taxation relieved by credit.

What happens if a pilot fails the 330-day test in all three years?

The foreign procedures are unavailable. The alternative, the Streamlined Domestic Offshore Procedures, carries a miscellaneous offshore penalty of 5 percent of the highest aggregate balance of the relevant foreign financial assets, and is only open to taxpayers who previously filed US returns for the last three years. A pilot who never filed and fails the test has no streamlined route and faces penalty exposure on the facts.

Do HMRC flat rate expenses and UK ISAs carry over to the US return?

No. HMRC's industry-wide flat rate expense for uniformed flight deck crew, recorded in the Employment Income Manual at EIM50050, reduces UK taxable pay only. ISAs are tax-free in the UK but fully reportable in the US, and funds held inside a stocks and shares ISA are generally passive foreign investment companies requiring Form 8621. Both must be handled separately on the US side.

Streamlined Foreign Offshore for UK-Based Airline Pilots

The Streamlined Foreign Offshore Procedures let a US citizen or green card holder flying for a UK or other non-US carrier catch up on years of unfiled US returns and FBARs with no penalty, provided the failure was non-willful and the pilot can pass a strict non-residency test. That test is where flight crew differ from every other American in Britain: you must have had no US abode and been physically outside the United States for at least 330 full days in at least one of the last three years, and a transatlantic roster can use up the 35-day margin faster than most captains expect. Pass the test and you file three years of returns, six years of FBARs and a Form 14653 certification, paying tax and interest only. Fail it and the picture changes sharply.

This guide is written from the preparation side of the desk. It covers how we count days from a logbook and roster, why pay earned over the Atlantic is not foreign earned income, how the US-UK treaty treats aircrew, what a senior pilot typically has unreported, and how the Streamlined Foreign Offshore Procedures (SFOP) package is assembled for someone whose working life is spent crossing borders.

What are the Streamlined Foreign Offshore Procedures and who can use them?

The Streamlined Foreign Offshore Procedures are the IRS programme under which US taxpayers living abroad file late or amended returns and late FBARs, certify that their past non-compliance was non-willful, pay the tax and statutory interest due, and in return are not charged penalties. The IRS sets out the terms at https://www.irs.gov/individuals/international-taxpayers/u-s-taxpayers-residing-outside-the-united-states, and the wording on that page is the only wording that matters when eligibility is tested.

On that page the IRS defines non-willful conduct as conduct that is due to negligence, inadvertence, or mistake, or conduct that is the result of a good faith misunderstanding of the requirements of the law. It also confirms that a taxpayer who has never filed a US return can use the foreign procedures by submitting complete and accurate delinquent returns on Form 1040. That second point matters for pilots, because most of the UK-based flight crew we see have never filed at all: they left the US young, or were born to an American parent, trained in Europe, and have been on UK PAYE for their whole career.

Eligibility rests on three things, and all three must be met:

Non-residency. For US citizens and lawful permanent residents, the IRS requires that in any one or more of the most recent three years for which the US tax return due date (or properly applied for extended due date) has passed, the individual did not have a US abode and was physically outside the United States for at least 330 full days.
Non-willfulness. The failure to file returns, report income and file FBARs must have resulted from non-willful conduct, certified under penalty of perjury on Form 14653.
A valid taxpayer identification number. Returns need a Social Security number, or an ITIN application submitted with the returns for someone not eligible for an SSN.

One further rule catches married crew. The IRS states that for a joint return, both spouses must meet the applicable non-residency requirement. Where a pilot is married to another US person with a different travel pattern, each spouse's days have to be counted separately before a joint filing is chosen.

How do US layovers affect the 330-day non-residency test?

A US layover normally costs two days, not one. The test asks for 330 full days physically outside the United States. The IRS physical presence guidance at https://www.irs.gov/individuals/international-taxpayers/foreign-earned-income-exclusion-physical-presence-test describes a full day as a period of 24 consecutive hours, beginning and ending at midnight, and that is the standard we apply when counting days for a streamlined submission. An aircraft that lands in the US on Tuesday afternoon and departs on Wednesday evening has made neither Tuesday nor Wednesday a full day outside the United States.

The arithmetic is unforgiving. In a 365-day year, 330 full days outside leaves 35 days on which any part of the day was spent in the US. At two days per standard one-night rotation, the margin is gone at around eighteen US trips in the year before a single personal visit is counted. A longer layover, a multi-sector US pattern, simulator training at a US facility or a family visit all draw on the same 35 days.

There is a distinction here that competing guides miss. The streamlined test asks whether you were outside the United States. The physical presence test for the Foreign Earned Income Exclusion asks something narrower: whether you were in a foreign country. Hours spent over the mid-Atlantic are outside the United States, so a day spent flying from London to Dubai or Johannesburg is a full day outside the US for SFOP purposes. The same hours do not count as time in a foreign country for the exclusion, because the IRS says time on or over international waters does not count. A pilot can therefore pass the streamlined non-residency test and still fail the physical presence test for the same year. They are two separate counts and should be kept on two separate schedules.

The physical presence guidance also contains a transit rule for someone passing through the US for less than 24 hours between two foreign points. The streamlined page does not repeat that rule, and a crew layover is not a passenger transit in any event. In the submissions we prepare, every calendar day with any US presence is treated as lost.

How to count days from the logbook and roster

The day count has to be reconstructed from records, not from memory, because Form 14653 is signed under penalty of perjury and the non-residency facts are part of the certification. The method we follow for flight crew is:

Start with the airline roster export for each of the three calendar years, because it carries scheduled and actual block times for every sector, including positioning flights.
Convert arrival and departure times at US airports to US local time. Rosters and logbooks are usually kept in UTC, and a 23:40 UTC arrival on the East Coast is early evening local time on the same calendar day, while a 03:10 UTC departure belongs to the previous local day. The midnight that matters is the one at the place where you are.
Mark every calendar day on which you were on the ground in, or airborne over, the United States for any part of the day. Routes that overfly US territory without landing deserve a note; the roster shows landings only, so flag any regular route where this is realistic.
Add personal travel from passport stamps, booking confirmations and staff travel records. Staff travel is the item most often forgotten.
Add training, simulator checks and any recurrent courses held in the US.
Total the US-touched days for each year and subtract from 365, or 366 in a leap year. Keep the working schedule with the file.

Only one of the three years needs to reach 330. That is the saving grace for long-haul crew: a year spent mostly on eastbound or southbound routes, a year on a different fleet, or a year with extended leave or medical grounding will often qualify even where the other two do not.

What does no US abode mean for a pilot?

The second limb of the test is that you had no US abode. The IRS refers to section 911 and Publication 54 for the meaning, and its tax home guidance at https://www.irs.gov/individuals/international-taxpayers/foreign-earned-income-exclusion-tax-home-in-foreign-country says abode has been variously defined as one's home, habitation, residence, domicile, or place of dwelling. The IRS example of someone with a US abode is an offshore rotation worker who returns to family in the United States during off periods. Its example of a foreign abode is an employee who moves the whole household to London and builds local ties.

A UK-based captain with a home, spouse, children at school and a base airport in the UK sits comfortably in the second pattern. The cases that need careful documentation are commuting pilots: crew who hold a UK base but whose family home remains in the US, and who return there between blocks of work. That pattern can fail the abode limb even if the day count somehow passes, and it is examined on the facts, not on the employment contract.

Is pay earned in international airspace foreign earned income?

No. The IRS addresses flight crew directly at https://www.irs.gov/businesses/us-citizens-performing-services-in-foreign-and-international-airspace. Foreign earned income is pay for services performed in a foreign country, and the IRS states that the term foreign country includes its airspace and territorial waters, but does not include airspace over international waters, the United States, US territories or Antarctica. It adds that the place where the services are performed determines whether the income is foreign, not the location of the employer or the place of payment.

For a long-haul pilot this means a UK salary paid in sterling by a UK employer into a UK bank account is only partly foreign earned income. The share earned while over the Atlantic, the Indian Ocean or the Pacific is not, and neither is the share earned in US airspace or on the ground in the US. The IRS guidance describes a time-based apportionment: hours worked in foreign countries divided by total hours worked, applied to total wages. It refers to Rogers v. Commissioner, T.C. Memo. 2009-111, in which a flight attendant's exclusion was limited in this way, and treats a reasonable duty-time or flight-time apportionment as an acceptable basis for the calculation.

A Form 2555 for a pilot therefore needs a flight-time apportionment for every year, built sector by sector from the roster. It is slow work, it leaves a slice of salary outside the exclusion and exposed to US tax, and it is one of the most common errors we find in returns that pilots prepared themselves: the whole UK salary excluded as if it had been earned at a desk in London.

Why the foreign tax credit is usually the cleaner route

For a UK-resident pilot whose entire salary has borne UK income tax through PAYE, the foreign tax credit on Form 1116 is normally the more straightforward method. The credit works on tax actually paid, so there is no need to carve the salary into foreign and non-foreign pieces to decide what may be excluded. For a higher-earning captain the UK tax on the salary will usually be more than the US tax on the same income, which leaves little or no US tax to pay and often produces carryforward credits.

The credit is not free of flight-time work, though. The credit limitation depends on the source of the income, and pay for services performed in the United States, including time in US airspace and on the ground there, is US-source. Left alone, that would leave the US-source slice of a UK salary taxed twice. This is where the treaty enters: the relief from double taxation article contains a mechanism, for US citizens resident in the UK, under which income can be treated as foreign-source to the extent needed to prevent that outcome. It is a treaty-based position, it has to be disclosed properly on the return, and it needs the same roster-based analysis of where the duty time fell. We raise it here so that readers know the issue exists; the computation is specific to each roster.

A practical complication is the calendar. US returns run on the calendar year while PAYE runs to 5 April, so UK tax has to be matched to the US year from payslips and P60s across two UK tax years for every US return in the package.

What does the US-UK treaty say about aircrew, and why does the saving clause matter?

The US-UK income tax convention, published by the US Treasury at https://home.treasury.gov/system/files/131/Treaty-UK-7-24-2001.pdf, has a specific rule for crew. Article 14, paragraph 3 provides that remuneration derived by a resident of one country in respect of an employment as a member of the regular complement of a ship or aircraft operated in international traffic shall be taxable only in that country. Read alone, that suggests a UK-resident pilot's salary is taxable only in the UK.

For a US citizen it is not that simple. Article 1, paragraph 4 is the saving clause: a country may tax its residents, and by reason of citizenship may tax its citizens, as if the convention had not come into effect. Paragraph 5 lists the provisions that survive the saving clause, and Article 14 is not among them. Article 24, relief from double taxation, is. The practical result for an American captain resident in the UK is that the aircrew rule does not remove the US filing obligation or the US charge on a citizen, even though it would protect a UK-resident colleague who is not a US person. Double taxation is relieved through the credit mechanism instead. Any pilot who stopped filing because someone in the crew room said the treaty makes aircrew pay taxable only at home has relied on half the rule.

Green card holders need a separate analysis. The streamlined non-residency test is the same 330-day and abode test, but the treaty position of a lawful permanent resident who is also UK resident raises residence tie-breaker questions that should be worked through before any return is prepared.

The UK side: residence, PAYE and flight allowances

On the UK side the starting point is residence. A UK-based pilot with a home and family in the UK will ordinarily be UK resident and taxed on the whole salary through PAYE, wherever the aircraft happened to be. HMRC's statutory residence test guidance at https://www.gov.uk/government/publications/rdr3-statutory-residence-test-srt/guidance-note-for-statutory-residence-test-srt-rdr3 notes that the full-time work overseas test does not apply to workers with a job on board a vehicle, aircraft or ship, so international aircrew cannot rely on that shortcut and are judged on the remaining tests and ties.

Flight allowances need translating for US purposes. HMRC's Employment Income Manual at https://www.gov.uk/hmrc-internal-manuals/employment-income-manual/eim50050 records an industry-wide flat rate expense agreement for uniformed commercial pilots, co-pilots and other uniformed flight deck crew working in the UK: a basic flat rate expense of 1,022 pounds from 2013/14 and a further expenses deduction of 110 pounds. Those are UK deductions. They reduce UK taxable pay and do not carry across to the US return, where employee expenses are treated under US rules.

Per diems and duty allowances paid while down-route are handled through the employer's payroll arrangements, with some elements taxed and some not. For the US return we rebuild gross pay from payslips, because the P60 figure reflects UK taxable pay only and can understate what the US regards as compensation. Each allowance is then looked at under US rules on its own terms.

What do UK-based pilots typically have unreported?

Salary is rarely the real exposure, because UK tax usually covers it. The items that generate US tax, or carry reporting penalties outside the streamlined programme, are the ones around the salary:

The employer pension scheme. Senior captains often hold large balances after decades of contributions. The scheme has to be considered for FBAR and Form 8938 reporting, and the US treatment of contributions and growth is determined under the treaty's pension provisions, which need to be claimed correctly.
UK savings and current accounts. Under the rules at https://www.irs.gov/businesses/small-businesses-self-employed/report-of-foreign-bank-and-financial-accounts-fbar, an FBAR is required where the aggregate value of foreign financial accounts exceeded 10,000 US dollars at any time during the calendar year. Almost every pilot crosses that line on salary account balances alone.
Stocks and shares ISAs. The UK tax exemption is not recognised by the US, so interest, dividends and gains are reportable. Where the ISA holds UK or European funds, those funds are generally passive foreign investment companies and each needs a Form 8621, with a punitive default tax regime if no election is in place.
Cash ISAs and premium bonds. Tax-free in the UK, taxable in the US.
Loss-of-licence insurance. Policies vary; the questions are who pays the premium, whether the policy has any cash or surrender value, and how a payout would be characterised for US purposes. It should be listed and reviewed, not assumed away.
Employee share schemes and joint accounts with a non-US spouse, both of which are reportable in full by the US person.

FBARs are due on 15 April following the calendar year, with an automatic extension to 15 October, and are filed with FinCEN, not with the tax return.

What goes into the SFOP package for a pilot?

The submission has a fixed shape, set by the IRS page for taxpayers residing outside the United States:

Delinquent or amended returns for each of the most recent three years for which the due date has passed, with all required international information returns attached, including Forms 8621 and 8938 where they apply.
FBARs for each of the most recent six years for which the FBAR due date has passed, filed electronically through FinCEN's BSA E-Filing System. The IRS instructs filers to select Other as the reason for late filing and enter Streamlined Filing Compliance Procedures as the explanation.
Form 14653, Certification by US Person Residing Outside of the US, with the non-residency facts for each year and a narrative statement of the specific reasons for the failure.
Streamlined Foreign Offshore written in red at the top of the first page of each return and of the certification. The IRS describes this as critical to ensure the returns are processed through the special procedures.
Payment of all tax due as reflected on the returns and all applicable statutory interest on each late amount.
The complete package on paper to the Austin, Texas address given on the IRS page.

In return, the IRS states that an eligible taxpayer will not be subject to failure-to-file and failure-to-pay penalties, accuracy-related penalties, information return penalties or FBAR penalties. The foreign procedures carry no miscellaneous offshore penalty at all.

The Form 14653 narrative is where pilot submissions are won or weakened. A generic statement that the taxpayer was unaware of the obligation is not a narrative. A pilot's statement should cover when and why they left the US, their training and employment history, the fact that pay has always been taxed at source in the UK, what they were told and by whom, the treaty misunderstanding if there was one, what professional help they had on the UK side and whether US obligations were ever raised, how they found out, and how quickly they acted. It should also set out the day count by year, tied to the roster schedule, and address the abode question directly. Facts that cut the other way, such as a US bank account, a US mortgage, or an earlier US return that omitted foreign accounts, need to be in the statement, not left for the IRS to find.

What happens if a pilot fails the 330-day test?

This is the risk that is specific to flight crew, and it is more serious than the usual description suggests. A taxpayer who fails the non-residency test in all three years is treated as a US resident for streamlined purposes and can only look to the Streamlined Domestic Offshore Procedures, set out at https://www.irs.gov/individuals/international-taxpayers/u-s-taxpayers-residing-in-the-united-states. Those procedures carry a miscellaneous offshore penalty equal to 5 percent of the highest aggregate balance or value of the taxpayer's foreign financial assets subject to the penalty during the covered tax return and FBAR periods. For a captain with a mature pension, savings and investments, the base can be large even though the additional US tax is small.

There is a second barrier that few guides mention. The domestic procedures require that the taxpayer has previously filed a US tax return, if required, for each of the most recent three years. A pilot who has never filed and who fails the 330-day test therefore fits neither streamlined route. That leaves late filing outside the streamlined programme, with penalty exposure assessed on the facts and no assurance of relief. This is why the day count is the first piece of work on any pilot engagement, before a single return is drafted, and why timing matters: because the test looks at the most recent three years for which the due date has passed, a qualifying year can drop out of the window if a submission is delayed past the next filing deadline. A pilot who can see a non-qualifying roster ahead should know which year currently carries the submission.

Worked illustration: a long-haul captain's roster

The following is an illustration only, with invented figures; it is not a client case. A US citizen captain has lived in the UK for many years with a UK home and family, flies long-haul for a non-US carrier, and has never filed a US return or an FBAR. The roster and travel records for the three most recent years for which the return due date has passed, labelled Year 1 to Year 3, show the following.

Year 1 (365 days): 21 one-night US rotations, each touching two US calendar days in local time, giving 42 days, plus a family visit touching 8 calendar days. Total US-touched days 50. Full days outside the United States: 315. The test is failed.
Year 2 (366 days, a leap year): a fleet change moves the captain to mostly eastbound flying. 11 US rotations give 22 days, plus one personal trip touching 9 calendar days. Total US-touched days 31. Full days outside the United States: 335. The test is met.
Year 3 (365 days): 17 US rotations give 34 days, plus a three-day simulator course in the US that touches 5 calendar days including travel. Total US-touched days 39. Full days outside the United States: 326. The test is failed.

Year 2 alone satisfies the day-count limb, and with no US abode in any year the captain meets the non-residency requirement for the whole submission. The package is three years of Forms 1040 using the foreign tax credit against UK PAYE, a roster-based sourcing schedule for each year, Forms 8621 for funds held in an ISA, Form 8938, six years of FBARs covering the bank accounts, ISA and pension, and Form 14653 with the day-count schedule attached to the narrative. Tax and interest arise mainly on the ISA funds. No penalty applies.

Now change one fact. If the Year 2 personal trip had touched 14 days instead of 9, US-touched days would be 36 and full days outside would be exactly 330, still a pass in a leap year. At 15 days the count falls to 329 and every year fails. On those facts the foreign procedures are closed, and because no returns were ever filed the domestic procedures are closed too. A single extra day of holiday is the difference between a penalty-free submission and no streamlined route at all, which is why the count is done in local time, from records, and checked twice.

Practical order of work

For a UK-based pilot the sequence we follow is consistent. First the day count and abode review for all three years, to establish that the Streamlined Foreign Offshore Procedures are available and which year carries them. Then the account and asset inventory for six years, including the pension scheme, ISAs and any insurance policies. Then the roster apportionment that supports the sourcing position, the returns themselves, the FBARs, and finally the Form 14653 narrative written from the facts already established. Doing it in that order means the certification describes a file that has already been built, and nothing in the statement has to be revisited once the numbers are known.

The procedures are only for conduct that can honestly be described as non-willful, and a submission is far stronger when it is made before the IRS raises the missing filings itself. For flight crew, the additional constraint is the roster itself. A qualifying year is an asset with an expiry date.