Do I need to file Form 5471 if my UK aircraft company makes a loss?

Yes. The Form 5471 filing duty depends on ownership and control, not profit. A US citizen who controls a UK company files every year it is controlled, even if charter income never covers depreciation and running costs. Loss years still need the balance sheet, the earnings and profits computation and Schedule M, because losses affect later years and a missing form carries the section 6038 penalty of 10,000 dollars per company per year.

Which Form 5471 category do I check as the sole owner of a UK company?

A US citizen who owns more than 50 percent of the vote or value of a UK company is a Category 4 filer and, because the company is a controlled foreign corporation, usually also meets the Category 5a test. A filer who meets both checks only Category 4 on the form, but must still complete every schedule required of both categories, which for a sole owner means the full return plus its separate schedules.

How does HMRC calculate the benefit in kind on a company aircraft?

Under section 205 of ITEPA 2003, the annual value is 20 percent of the aircraft's market value when first used to provide a benefit, plus additional running expenses. That annual cost is then reduced for days the aircraft was unavailable for private use, such as maintenance, days outside your control and days of purely business use. The charge applies to availability, not actual flights, and the same figure is used for Class 1A National Insurance.

Is charter income from a UK company aircraft subpart F income?

It depends on how the chartering is done. Rent from leasing the aircraft is foreign personal holding company income unless the active rents exception applies, which requires an active leasing business and an unrelated payer. Charters the company operates itself for unrelated customers are generally not foreign base company services income. Income outside subpart F is usually tested income, reported on Schedule I-1 under the regime now described as net CFC tested income.

Can a UK company aircraft count as US property under section 956?

Only in limited cases. Section 956 treats tangible property located in the United States as US property, so an aircraft based and flown mainly in the UK and Europe is normally outside it. Even an aircraft kept in the US can be excluded if it is used to transport persons or property in foreign commerce and used predominantly outside the United States. Loans or guarantees between the company and its US owner need separate review.

Should I reimburse my UK company for personal flights on its aircraft?

Reimbursement at an arm's-length rate is often the cleaner route. In the UK, amounts a director makes good can reduce the benefit in kind where HMRC's conditions are met. On the US side, the payment becomes a reported related-party transaction on Schedule M rather than an unpriced benefit that must be characterised as compensation or a constructive distribution. A complete flight log is essential to price the personal legs correctly.

Form 5471 for a UK Company That Owns a Private Aircraft

Form 5471 is the IRS information return a US citizen must file each year for a UK company they control, and the obligation does not change because the company's main asset is a private aircraft rather than an office or a stock of inventory. If you are a US citizen living in the UK and your limited company, or a separate UK asset-holding company, owns an aircraft that flies you to meetings, takes your family on holiday and earns charter income in between, you will normally file as a Category 4 filer, report the aircraft on the company's US-dollar balance sheet, report your dealings with the company on Schedule M, and work through how the charter income and your personal use are treated under US rules. At the same time, HMRC taxes the private availability of that aircraft as a director's benefit in kind, on a basis that bears little resemblance to the US view.

Who has to file Form 5471 when a UK company owns an aircraft?

Form 5471 is required from US persons who own, control or hold office in certain foreign corporations. The IRS instructions at https://www.irs.gov/instructions/i5471 sort filers into five categories. For the owner-managed aircraft company, two of them matter. A Category 4 filer is a US person who had control of the foreign corporation during its annual accounting period, and control means owning more than 50 percent of the total combined voting power or more than 50 percent of the total value of its stock. The statute uses the same test in 26 USC 6038(e)(2), which you can read at https://www.law.cornell.edu/uscode/text/26/6038, and it applies attribution rules so that shares held by close family members or by entities you own can count towards your percentage.

A Category 5 filer is a US shareholder of a controlled foreign corporation, or CFC, who owned stock during the year and still held it on the last day the company was a CFC. A UK company more than half owned by a single US citizen is a CFC, so that owner usually meets the Category 5a test as well as Category 4. The rule to apply on the face of the form is simple: a filer who meets both the Category 4 and Category 5a tests checks only Category 4. The instructions confirm that filers in more than one category do not duplicate information, but they must complete every item that applies to each category, and for a sole owner of a CFC that means the full form plus the separate schedules.

Two points catch aircraft owners out. First, the filing duty has nothing to do with profit. A company that holds an aircraft and makes a loss every year still triggers the return. Second, the old rule under which a company had to be a CFC for an uninterrupted 30 days before the income inclusion rules applied was removed by the 2017 Act, so a company that becomes a CFC part way through the year is caught for that year. If the aircraft sits in a separate asset-holding company owned by your trading company, both companies are foreign corporations in their own right and each one generally needs its own Form 5471.

Category 4: you control the UK company (more than 50 percent of vote or value, counting attributed shares).
Category 5a: you are a US shareholder of a CFC and not a Category 5b or 5c filer; a controlling owner usually meets this too, but checks only Category 4.
US citizens who are officers or directors of the company can have their own filing duty in some years, so check the position whenever a US spouse or adult child joins the board or the share register.
One Form 5471 per foreign corporation per year, attached to your Form 1040 and filed by its due date including extensions.

How is the aircraft reported on the Form 5471 balance sheet?

Schedule F is the company's balance sheet, reported in US dollars. The instructions say that the balance sheet is generally translated into dollars using US GAAP translation rules, so the figures are not simply lifted from the UK statutory accounts and converted at a single rate. The aircraft sits within the company's depreciable fixed assets, shown with its accumulated depreciation, alongside any loan used to fund the purchase on the liabilities side. Where the aircraft was bought with a shareholder loan from you, that loan appears as a liability of the company and also becomes relevant to Schedule M.

Depreciation is where the UK and US numbers drift apart. In the UK, an aircraft owned by a company is generally plant and machinery for capital allowances, and the allowance actually available depends on how the aircraft is used, whether it is leased out and which pool it falls into. For US purposes the company's current earnings and profits, which drive Schedule H, are computed on US principles. The Schedule H instructions say that depreciation generally must be based on the historical cost of the underlying asset, and where 20 percent or more of the company's gross income is from US sources, depreciation must be computed on a straight-line basis under Regulations section 1.312-15. In practice the US earnings-and-profits figure for an aircraft company is usually built from a separate fixed asset schedule, kept in dollars, that runs alongside the UK capital allowance computation rather than replacing it.

The failure mode we see most often is an aircraft company whose Form 5471 simply reuses the UK tax computation, with UK capital allowances standing in for US depreciation. That distorts earnings and profits and every later figure that depends on them, including previously taxed earnings when the company pays a dividend or sells the aircraft.

Does personal use of a company aircraft create US income for the owner?

When a shareholder uses a company asset for private purposes without paying for it, the US tax system starts from the question of what that economic benefit is. For a controlling shareholder who is also a director, the benefit may be characterised as compensation for services or as a constructive distribution from the company, and the answer depends on the facts: whether the company has a formal arrangement treating the use as part of your remuneration, how it is recorded in the UK accounts, and whether the use is in proportion to your shareholding or your role.

We do not treat personal flights as invisible for US purposes simply because the aircraft is owned offshore. In the returns we prepare, the starting point is a reliable flight log showing each leg, its passengers and its purpose, and a documented valuation of the personal legs. Every other figure in this structure depends on that log.

Can the aircraft be an investment in US property under section 956?

Section 956 requires a US shareholder to include certain amounts when a CFC holds United States property. The statute at https://www.law.cornell.edu/uscode/text/26/956 defines United States property to include tangible property located in the United States. An aircraft based at a UK airfield and flown mainly within the UK and Europe is not tangible property located in the United States, and section 956 is not normally in point.

The question becomes real only if the aircraft is kept in the United States, for example because the owner spends part of the year at a US home and hangars the aircraft there. Even then, section 956(c)(2)(D) excludes any aircraft used in the transportation of persons or property in foreign commerce and used predominantly outside the United States. Whether an aircraft meets that exception is a factual question that turns on where and how it is used across the year, so we look at the full flight log rather than a single season. The instructions also note that United States property is measured on a quarterly average basis, so a few weeks of US basing does not translate into a full-year figure.

One further caution: a loan from the UK company to its US owner, or a guarantee by the company of the owner's personal borrowing, raises section 956 questions of its own regardless of where the aircraft sits.

Is charter income subpart F income or tested income?

Charter income is where the aircraft company moves from being a passive asset holder to having a business, and the US classification depends on exactly how the chartering is done. Three patterns cover most of what we see.

Dry lease to an unrelated operator: the company leases the aircraft without crew and receives rent. Under 26 USC 954(c)(1)(A), rents are foreign personal holding company income, a category of subpart F income, unless the active rents exception in section 954(c)(2)(A) applies. That exception requires the rents to be derived in the active conduct of a trade or business and received from a person that is not related to the company.
Management by a third-party operator who charters the aircraft to the public on the company's behalf: the economics resemble a lease, and whether the company itself is actively conducting a leasing business is a factual question about its own staff and activity, not the operator's.
The company operates charters itself, with its own crew and its own operating approvals: the income is transportation income from services. Foreign base company services income under section 954(e) applies to services performed for or on behalf of a related person outside the company's country of incorporation, so charters sold to unrelated customers generally fall outside it.

Foreign base company shipping income, which once captured aircraft income, no longer exists: section 954(f) was struck out by Public Law 108-357 in 2004, as the statute at https://www.law.cornell.edu/uscode/text/26/954 records.

Income that is not subpart F income generally becomes tested income, reported on Schedule I-1, which the instructions describe as the schedule used to provide information relating to section 951A. The 2025 legislation, which the instructions refer to as the OBBBA, changed that regime, and the current instructions describe the shareholder's position in terms of net CFC tested income. For an aircraft company the practical point is that charter profits are usually picked up by the US owner each year under either subpart F or the tested income rules, whether or not the company pays a dividend, and the UK corporation tax the company pays on those profits is a key input into any foreign tax credit. We confirm the regime for the company's specific tax year, because UK accounting years often straddle the effective dates.

How does HMRC tax a director's private use of a company aircraft?

On the UK side, an aircraft made available to a director for private use is an asset made available without transfer, taxed under section 205 of the Income Tax (Earnings and Pensions) Act 2003. The legislation at https://www.legislation.gov.uk/ukpga/2003/1/section/205 sets the annual cost as the higher of the annual value of the use of the asset and any rent or hire charge paid by the company, plus the additional expense of providing the benefit. For an asset other than land, the annual value is 20 percent of its market value at the time it was first applied in providing an employment-related benefit. Additional expense includes a proper share of mixed-purpose costs, but excludes the cost of acquiring the asset.

HMRC's guidance on assets made available without transfer, at https://www.gov.uk/government/publications/assets-made-available-without-transfer-of-ownership/assets-made-available-without-transfer, uses a jet as one of its worked examples and makes three points that matter for aircraft owners. Made available does not just mean used: if the aircraft is available for your private use, the charge applies even on days you do not fly. The annual cost is reduced only for days when the aircraft is unavailable, such as days it is under repair, not fit to use, outside your use, or used solely for your work duties, and a day with any private use is not a business day. And the same chargeable amount applies for income tax and Class 1A National Insurance contributions, even where use is mixed.

Annual value: 20 percent of market value when first used to provide a benefit (usually the cost to the company).
Plus additional expense: running costs such as crew, maintenance, insurance and hangarage, with mixed-purpose costs apportioned.
Less unavailable days on a days-over-year basis: maintenance, charter days outside your control, and days of purely business use.
Less amounts you make good where HMRC's conditions are met.
Reported by the company for the director, with Class 1A National Insurance contributions payable by the company on the same figure.

What goes on Schedule M for an aircraft company?

Schedule M reports transactions between the CFC and its shareholders and other related persons, and the filing chart in the instructions shows it is required from Category 4 filers. For an aircraft company, the related-party traffic is usually heavier than the owner expects: shareholder loans used to buy the aircraft, interest on those loans, any reimbursement you pay for personal flights, amounts the company pays on your behalf, management or crew services provided by your trading company, and dividends.

Schedule M has specific lines for several categories, including dividends, loan guarantee fees and catch-all lines for other amounts received and other amounts paid. In the returns we prepare we reconcile Schedule M to the related-party note in the UK accounts and to the director's loan account, line by line, because a mismatch between the two is an easy thing for an examiner to spot and a hard thing to explain later.

Worked scenario: a UK company aircraft with mixed use

The following figures are an illustration only. They are not drawn from a real client, and they assume an exchange rate of 1.30 US dollars to the pound for convenience.

Daniel is a US citizen living in London. He owns 100 percent of a UK trading company, which owns 100 percent of a UK asset-holding company. The holding company bought a light business jet for 4,000,000 pounds and made it available to Daniel from the first day of the tax year. During the year the aircraft flew 160 days: 80 days purely on company business, 40 days with Daniel and his family on personal trips, and 40 days chartered to unrelated customers through a third-party operator under an arrangement that removes it from Daniel's control on those days. It also spent 25 days in scheduled maintenance. Running costs met by the holding company were 350,000 pounds, and charter revenue was 600,000 pounds.

UK benefit in kind: the annual value is 20 percent of 4,000,000 pounds, or 800,000 pounds, plus 350,000 pounds of additional expense, giving an annual cost of 1,150,000 pounds. Unavailable days are 80 business days, 40 charter days outside Daniel's control and 25 maintenance days, a total of 145. The deduction is 145 divided by 365, multiplied by 1,150,000 pounds, which is about 456,800 pounds, leaving a cash equivalent of about 693,200 pounds. Daniel pays income tax on that amount as a benefit, and the company pays Class 1A National Insurance contributions on the same figure. Note the counterintuitive result: although Daniel flew privately on only 40 days, the charge reflects the 220 days on which the aircraft was simply available to him.

US filings: Daniel files two Forms 5471, one for each company, checking only Category 4 on each. The holding company's Schedule F shows the aircraft at its translated dollar cost, about 5,200,000 dollars, less accumulated depreciation computed on US principles, not UK capital allowances. The charter revenue is analysed under the rules above: received as rent through a third-party operator, it is foreign personal holding company income unless the company itself meets the active rents exception, which on these facts, with no staff of its own, it likely does not. Daniel's personal flights are valued from the flight log at an arm's-length rate, assumed here at 180,000 pounds, about 234,000 dollars, and characterised either as compensation through the trading company or as a constructive distribution from the holding company, depending on how the arrangement is documented. The aircraft never sits in the United States, so section 956 does not arise from the aircraft itself.

The planning point in this illustration is the gap between the two systems. The UK charge is about 693,200 pounds based on availability; the US amount is about 180,000 pounds based on actual personal use. If Daniel instead reimbursed the company for his personal flights at the arm's-length rate before the UK deadline for making good, the UK charge would be reduced by the amount made good where HMRC's conditions are met, and on the US side the reimbursement would be a reported related-party payment on Schedule M rather than a disputed benefit.

Where the US and UK rules pull in different directions

Two issues rarely covered in published guidance appear repeatedly in the aircraft returns we prepare.

The first is characterisation and foreign tax credits. The UK taxes Daniel's benefit as employment income. If the US treats the same benefit as a constructive distribution rather than compensation, the UK tax paid on the benefit and the US income it relates to may fall into different categories for US foreign tax credit purposes, and the credit may not line up with the US liability it is meant to offset. Consistent, documented characterisation decides whether the UK tax actually protects the US position.

The second is timing. The UK benefit is computed on the UK tax year running to 5 April. The company's own accounting year may end on any date, and Form 5471 follows the company's annual accounting period. Daniel's US return follows the calendar year. A single personal trip can therefore fall in different years under each of the three clocks, and the flight log needs to be capable of being cut by date in all three ways.

What are the penalties for not filing Form 5471?

The penalty for failing to furnish the required information is set by 26 USC 6038(b): 10,000 dollars for each annual accounting period of each foreign corporation for which the failure exists. If the failure continues for more than 90 days after the IRS mails a notice, an additional 10,000 dollars applies for each 30-day period or part of one, with the increase capped at 50,000 dollars. For Daniel, with two companies, a missed year exposes him to two initial penalties, not one.

Section 6038(c) adds a separate consequence: the foreign taxes available for credit under sections 901 and 960 are reduced by 10 percent, increasing by a further 5 percent for each three-month period of continued failure after the 90-day point. For an aircraft company paying UK corporation tax on charter profits, losing part of the credit for that tax can cost more than the flat penalty. That is why we treat late Forms 5471 as a priority whenever a new client with a UK company comes to us.

Where returns have been missed, the route back depends on the wider history. Owners who have also missed their US income tax returns or FBARs, and whose failure was non-wilful, often regularise through the Streamlined Foreign Offshore Procedures, which carry no penalty for eligible taxpayers living outside the United States, with the delinquent Forms 5471 filed as part of the submission. Late FBARs themselves are filed through FinCEN's BSA E-Filing System with a reason for late filing, or within the streamlined submission.

A Form 5471 checklist for aircraft-owning UK companies

Map the ownership chain and file a separate Form 5471 for each UK company, checking only Category 4 where you also meet Category 5a.
Keep one flight log with date, legs, passengers and purpose for every flight, usable for the UK tax year, the company year and the US calendar year.
Maintain a US-principles fixed asset schedule for the aircraft in dollars, separate from the UK capital allowance computation.
Classify charter income by how it is earned (lease, managed charter or own operation) before deciding between subpart F income and tested income.
Value personal use at arm's length and decide, in writing, whether it is remuneration, a distribution or reimbursed.
Check where the aircraft is based and flown before ruling section 956 in or out, and review any loans or guarantees between the company and the owner.
Reconcile Schedule M to the related-party note and the director's loan account.
Agree the UK benefit in kind computation, unavailable days and any amounts made good, and make sure the Class 1A figure matches.