US Personal Tax Services: LLC Profits Interests for UK Execs

A UK-resident American executive paid in US LLC profits interests is taxed by two systems that disagree at every stage. The IRS treats a qualifying interest as worth nothing on grant and its holder as a partner receiving a Schedule K-1 each year. HMRC sees an employment-related security with a market value, taxed as employment income.

Specialist US Personal Tax Services matter here because the same units generate a different taxable event, in a different year, at a different value, on each return. At Jungle Tax we prepare both the US and the UK returns for London-based management of US private-equity-backed and venture-backed groups, and we are regularly instructed by executives who learn, usually when a sale process begins, that several years of Schedule K-1 income never reached a Form 1040 or that the UK charge at grant was never operated. This guide explains what the executive actually receives, what each return must show at grant, during the holding period and on exit, and how missed years are put right. It is about reporting what has happened, not about how an award should be designed.

What is an LLC profits interest, and what does the executive actually receive?

US sponsors commonly hold an operating group through a limited liability company that is taxed as a partnership for US federal purposes. Rather than share options, management receive a separate class of membership units, typically called incentive units, Class B units, management incentive units or profits interest units. The documents an executive signs usually comprise an award agreement, a joinder to the LLC operating agreement and, in most cases, a vesting schedule with time-based and performance-based tranches.

The defining commercial feature is the distribution threshold (also called a hurdle or participation threshold). It is set at or above the value of the LLC on the grant date, so that if the business were sold the next day the new units would receive nothing. The holder shares only in value created after grant. That single feature is what allows the US analysis to start from nil.

What arrives in the executive's hands

• At grant: an award agreement, a unit certificate or ledger entry, usually no cash cost, and often a request to sign a protective US section 83(b) election within 30 days.
• Each year: a Schedule K-1 (Form 1065) from the LLC, frequently issued in the summer or early autumn, sometimes with state K-1 equivalents, and in some groups a "tax distribution" of cash intended to cover the US tax on the allocation.
• On exit: a waterfall statement showing proceeds by class of unit, a final K-1, and possibly rollover units in a new holding entity.

What frequently does not arrive is any UK document at all: no valuation, no joint election, no entry on a payslip. That silence is where most of the problems described below begin.

How does the IRS treat a profits interest at grant and vesting?

The US position rests on two pieces of administrative guidance rather than on the Code itself. Rev. Proc. 93-27 provides that where a person receives a profits interest for services to or for the benefit of a partnership, in a partner capacity or in anticipation of becoming a partner, the IRS will not treat the receipt as a taxable event for the partner or the partnership. A profits interest is defined negatively: it is any partnership interest other than a capital interest, and a capital interest is one that would give the holder a share of the proceeds if the partnership's assets were sold at fair market value and the proceeds distributed in a complete liquidation. That test is generally applied at the time of receipt.

The safe harbour in Rev. Proc. 93-27 does not apply in three situations: where the interest relates to a substantially certain and predictable stream of income from partnership assets; where the partner disposes of the interest within two years of receipt; or where the interest is a limited partnership interest in a publicly traded partnership.

Rev. Proc. 2001-43 then deals with unvested units. It confirms that the profits-interest test is applied on the grant date even if the interest is substantially nonvested, and that neither the grant nor the later vesting event is treated as taxable, provided three conditions are met:

• the partnership and the service provider treat the service provider as the owner of the interest from the date of grant, and the service provider takes into account the distributive share of partnership income, gain, loss, deduction and credit associated with it for the entire period the interest is held;
• neither the partnership nor any partner deducts any amount, as wages, compensation or otherwise, for the fair market value of the interest on grant or on vesting; and
• all other conditions of Rev. Proc. 93-27 are satisfied.

The guidance states that taxpayers within it need not file a section 83(b) election. In practice many awards still ask for a protective election reporting a value of zero, in case the interest is later found to fall outside the safe harbour.

Two consequences flow directly from the first condition and are routinely overlooked by UK-based holders. First, the executive is a partner from day one, including for unvested units, so a K-1 is expected for every year from grant. Second, the two-year disposal exception means an early exit can take the award outside the safe harbour altogether, which changes how the grant year should have been reported.

How does HMRC treat the same units?

HMRC does not apply a liquidation-value test. The starting point is Part 7 of ITEPA 2003, which applies to securities acquired by reason of employment; HMRC's Employment Related Securities Manual sets out its scope. The statutory definition of securities is wide and extends to shares in bodies formed under non-UK law, so membership units in a US LLC acquired because of a UK employment will generally fall within the regime.

The UK question is then one of market value: what would a hypothetical purchaser pay for the units, with their rights and restrictions, on the acquisition date? A unit that would receive nothing on an immediate sale can still carry a real market value, because a purchaser would pay something for the prospect of future growth. That "hope value" is exactly what the US liquidation test ignores. Where the executive pays less than market value, the shortfall is employment income.

Restricted securities and the section 431 election

Incentive units almost always carry vesting, leaver and transfer restrictions, which brings them within the restricted securities rules in Chapter 2 of Part 7. Three outcomes are possible at acquisition:

• Forfeiture restrictions lasting no more than five years, no election: there is generally no income tax charge on acquisition, but the full value is charged as employment income when the restriction lifts or the units are sold.
• Other restrictions, no election: income tax is charged at acquisition on the restricted market value, and a proportion of later growth is charged to income tax on a chargeable event such as vesting or sale.
• Joint election under section 431: employer and employee elect, within 14 days of acquisition, to be taxed up front on the unrestricted market value. Later growth then falls outside the restricted securities income tax charge. HMRC's guidance on the election is in ERSM30450. The election is retained, not sent to HMRC.

If the units are readily convertible assets, the employment income is collected through PAYE with employee and employer National Insurance contributions, and the executive must reimburse the employer for the PAYE within 90 days of the end of the tax year or face a further income tax charge on the unreimbursed amount. The UK employing company must also report the acquisition on its annual employment-related securities return, due by 6 July following the end of the tax year.

Entity classification in one paragraph

Everything above assumes the UK treats the LLC as an opaque, company-like entity, which remains HMRC's general approach to US LLCs following the Supreme Court decision in Anson, as set out in Revenue and Customs Brief 15 (2015). On that footing, undistributed profit allocated on a K-1 is not UK income, and cash distributions are taxed in the UK broadly as foreign dividends. Whether a particular LLC is instead transparent depends on its operating agreement and governing law, and that conclusion changes the relief position materially. We cover the point fully in our guide to US LLC UK tax treatment after Anson.

US versus UK treatment at each stage

Stage	United States (IRS)	United Kingdom (HMRC)
Nature of the award	Partnership interest; holder is a partner	Employment-related security, in an entity generally treated as opaque
Value at grant	Nil under the liquidation-value test if the safe harbour conditions are met	Market value, including hope value; no nil presumption
Election at grant	Protective section 83(b) election within 30 days (not required under Rev. Proc. 2001-43)	Section 431 joint election within 14 days
Vesting	No taxable event within the safe harbour	Possible employment income charge if no election was made
Annual profit allocation	Taxed each year on the K-1 share, whether or not cash is paid	Not taxed until distributed, if the LLC is opaque
Cash distributions	Generally a non-taxable reduction of basis	Generally taxed as foreign dividend income
UK salary from the group	Wages, or a guaranteed payment if the employer is disregarded into the LLC	Employment income under PAYE with Class 1 National Insurance
Exit	Capital gain on sale of a partnership interest, with ordinary income for "hot assets"; basis built from K-1 history	Capital gain, or employment income in part, depending on the grant-date position; base cost built from amounts paid and taxed
Employer reporting	Form 1065 and Schedule K-1	Annual employment-related securities return; PAYE where applicable

What does each return report in the year of grant?

Take an illustration. An American chief commercial officer, resident in London and employed by the group's UK subsidiary, is granted incentive units in the Delaware parent LLC in June 2024. The distribution threshold equals the LLC's value on that day. She pays nothing. A later UK valuation supports an unrestricted market value of £60,000.

• US Form 1040 for 2024: no compensation income from the grant. A protective 83(b) election, if made, reports nil. She is nonetheless a partner from June, so the 2024 K-1 belongs on this return even if every box shows zero.
• UK Self Assessment for 2024-25: if a section 431 election was signed, £60,000 of employment income. If the units were readily convertible assets, that sum should appear in her P60 figures with PAYE operated; if not, it is reported on the additional information pages of the return as a taxable amount from share-related benefits and the tax is paid through Self Assessment.

The cross-border consequence is uncomfortable. UK income tax at up to 45% has been paid on £60,000 for which there is no corresponding US income at all. The UK tax is a creditable foreign tax on Form 1116, but with no matching US tax on that item it tends to become an excess credit in the general category, available to carry back one year and forward ten. Whether it is ever used depends on her other foreign-source earnings. A preparer looking only at the US documents would never know the UK charge existed; a preparer looking only at the UK payslip would not know there was a partnership interest to report.

What happens each year: K-1 income with no cash against UK employment income?

From the first full year, the LLC allocates a share of its income, gain, loss and deductions to every unit-holder under the operating agreement. A US citizen must report that share on Form 1040, through Schedule E and the related forms, whether or not a dollar is distributed. This is the "phantom income" problem, and for a UK-resident holder it has three cross-border layers.

The source problem

The LLC's operating profit is typically US-source business income. The executive's UK tax is paid on UK salary. Under the US foreign tax credit rules, UK tax on foreign-source wages does not offset US tax on US-source partnership income, so the K-1 allocation commonly produces US tax payable in cash even for an executive whose UK tax bill comfortably exceeds her US liability on everything else.

The timing problem

If the LLC is opaque for UK purposes, the UK taxes nothing until cash is distributed. When a tax distribution arrives, HMRC generally treats it as dividend income, taxable at up to 39.35% for an additional-rate taxpayer, while the US treats the same cash as a non-taxable return of basis. One country has taxed the profit, the other the distribution, and HMRC's general position is that these are not the same income for credit purposes. Continuing the illustration: a 2025 K-1 allocates $45,000 of ordinary income and the LLC pays an $18,000 tax distribution. The US return reports $45,000; the UK return reports the sterling equivalent of $18,000 as a foreign dividend; and neither figure appears on the other return.

The calendar problem

K-1s for a calendar-year LLC are frequently issued months after the 15 April and 15 June US dates, which is why an extension to 15 October is the norm for unit-holders. US estimated tax is due quarterly on Form 1040-ES because nothing is withheld on a distributive share. The UK tax year runs to 5 April and the Self Assessment return is due the following 31 January, so a single distribution has to be tracked across two differently shaped tax years and translated at the appropriate exchange rate on each return.

Other annual items a complete US return may need include state nonresident returns where the LLC operates in states that tax nonresident partners, the 3.8% Net Investment Income Tax where the allocation is passive in the holder's hands, and Form 8082 where the K-1 as issued is wrong. Our guide to Form 8082 and inconsistent K-1 treatment explains when that form is required.

Why does the holder stop being a W-2 employee, and what does that do to self-employment tax?

The IRS has long taken the position that a bona fide partner is not an employee of the partnership in which they hold an interest. Payments to a partner for services are guaranteed payments, reported on the K-1 and subject to self-employment tax, not wages subject to withholding and FICA. Treasury regulations extend the same result to a partner who works for an entity that is disregarded into the partnership.

For a London executive, the answer therefore turns on a fact that is rarely explained to management: how the UK employing company is classified for US tax purposes.

• UK subsidiary treated as a corporation for US purposes: the executive can be an employee of that corporation and a partner in the parent LLC. Salary remains foreign-source wages on Form 1040, and only the K-1 share is partner income.
• UK subsidiary treated as disregarded into the LLC: from the grant date the executive is, for US purposes, a partner providing services to the partnership. The UK salary is still paid through PAYE and reported on a P60, but on the US return it is properly a guaranteed payment and net earnings from self-employment.

In the second case, self-employment tax of 15.3% (12.4% Social Security up to the annual wage base and 2.9% Medicare, with a further 0.9% Additional Medicare Tax at higher incomes) applies to a US citizen wherever they live, unless a social security agreement assigns coverage elsewhere. The US-UK totalization agreement is designed to prevent contributions being due in both countries on the same earnings. An executive paying Class 1 National Insurance in the UK will ordinarily look to that agreement, supported by a certificate of coverage obtained from HMRC, to show that US self-employment tax is not due, and the US return must then claim the exemption expressly. Where no certificate has been obtained and the return has been prepared as if the salary were ordinary wages, the filing is simply wrong, even if the eventual tax difference is small.

The treatment of the K-1 distributive share itself is less settled. The Code excludes a limited partner's distributive share from self-employment earnings, and the US courts have recently disagreed on whether an LLC member who works in the business can rely on that exclusion. A return should take a considered, documented position on the point and apply it consistently from year to year.

What does each return report on exit?

On a sale of the group, the two systems finally both recognise something, but they compute it differently.

The US computation

The executive has sold a partnership interest. Gain is the amount realised less outside basis, and basis is a running figure: it starts at nil for a profits interest received for no payment, rises with each year's allocated income and falls with each distribution. Gain is generally capital, long-term if the units were held for more than one year, except to the extent attributable to "hot assets" such as unrealised receivables and inventory, which is ordinary income reported with Form 8308 information from the LLC. A three-year holding period applies to certain interests held in connection with investment management businesses, and the 3.8% Net Investment Income Tax may apply in addition to the 20% top long-term rate. An exit within two years of grant engages the disposal exception in Rev. Proc. 93-27.

The practical point is that basis cannot be computed without every K-1 since grant. An executive who never reported them has no reliable basis figure, and the missing years have to be reconstructed before the exit year can be filed.

The UK computation

If a section 431 election was made and the acquisition-date charge was dealt with, the disposal is generally within capital gains tax, at 24% for a higher or additional-rate taxpayer, with base cost equal to any amount paid plus the amount charged to income tax on acquisition. If no election was made, part or all of the proceeds may be employment income under the restricted securities rules, taxed at up to 45% with National Insurance and collected through PAYE by a UK employer that may by then be under new ownership. If nothing was done at grant, the acquisition-date liability is still outstanding and the exit is when it surfaces.

In the illustration, suppose the units realise $1.2 million in 2028. The US gain is measured against a basis of $27,000 ($45,000 allocated less $18,000 distributed, assuming no further allocations). The UK gain is measured against £60,000. The gains differ, the currencies differ, and the US foreign tax credit for UK capital gains tax has to be matched to the correct category and source of income. This is the year in which errors from every earlier year become visible, which is why we prefer to assemble the full history before the completion statement is issued.

Which filings are most often missed?

• K-1 income omitted from Form 1040. The executive believes nothing happens until exit. The IRS receives a copy of every K-1 and can match it.
• UK salary reported as wages when it is a guaranteed payment, with no Schedule SE position and no certificate of coverage.
• No UK valuation and no section 431 election. The US advice said "nil value" and nobody asked the UK question. The 14-day window cannot be reopened.
• No employment-related securities return by the UK employer, and no PAYE on a readily convertible asset.
• Distributions omitted from the UK return because they were described as "tax distributions" and assumed to be tax-neutral.
• Units held through a non-US management vehicle. An interest in a US LLC is not itself a specified foreign financial asset for Form 8938. Where management instead hold through a holding entity formed outside the US, Form 8938 and, depending on the entity's US classification, Form 8865 or Form 5471 can come into play.
• Foreign tax credits claimed in the wrong year or category, particularly UK tax on the grant-date charge.
• State filings and estimated tax never made, producing underpayment interest.

How are missed years put right?

The route depends on what was missed and why. We begin by collecting every award agreement, K-1, distribution notice, payslip and P60 since grant, and building a year-by-year schedule of what each return should have shown.

On the US side

Where returns were filed but K-1 income was left off, the usual remedy is an amended return for each affected year on Form 1040-X, with tax and interest paid and a reasoned statement where penalty relief is sought. The IRS streamlined filing compliance procedures are a different tool. They are aimed at non-wilful failures to report income from foreign financial assets and the related information returns, and under the Streamlined Foreign Offshore Procedures an eligible taxpayer files three years of returns and six years of FBARs with a certification on Form 14653 and no miscellaneous offshore penalty. An executive whose only omission is a US LLC K-1 may not fit that programme; one who has also left UK accounts, UK investment income or a non-US holding vehicle unreported often does. Choosing the wrong route is a common and avoidable error, and our streamlined filing team assesses eligibility before anything is submitted.

On the UK side

A Self Assessment return can be amended within 12 months of its filing deadline. Earlier years are corrected by a voluntary disclosure to HMRC. HMRC's ordinary assessment window is four years from the end of the tax year, extended to six years for careless errors and 20 years for deliberate ones, with longer periods for certain offshore matters. An unoperated PAYE charge is primarily the employer's liability, so correction usually involves the UK company as well as the individual, including a late employment-related securities return. Our UK return preparation and US return preparation teams work from one reconciled schedule so that each corrected UK figure feeds the right US foreign tax credit year.

A preparation sequence that works

1. Confirm the US classification of the LLC and of the UK employing entity.
2. Obtain every K-1 and reconstruct outside basis from the grant date.
3. Establish the UK acquisition-date value and whether any election exists.
4. Reconcile distributions to both tax years in both currencies.
5. Settle the social security position and obtain a certificate of coverage if needed.
6. Recompute foreign tax credits by year and category.
7. Correct the UK and US years in a coordinated order, so that neither disclosure contradicts the other.

Why one preparer for both returns?

Each stage of an incentive unit award produces a figure on one return that is the starting point for a figure on the other. The UK acquisition charge creates a US foreign tax credit. The US K-1 history creates the basis that the UK computation ignores. The UK PAYE record becomes, in some groups, a US guaranteed payment. Two preparers working separately will each produce a return that is internally coherent and jointly inconsistent. Executives who also hold shares in a UK buyout vehicle will find the parallel analysis in our guide to sweet equity for American managers, and our US-UK tax accountants prepare both sides as a single engagement.

Speak to a team that prepares both returns

If you hold incentive units or a profits interest in a US LLC and live in the UK, the time to check the reporting is before a sale process, not during one. Jungle Tax prepares the US and UK returns together, reconstructs K-1 and basis history, and brings missed years up to date with both authorities. To arrange a confidential consultation, contact our cross-border team and we will review your award documents, K-1s and UK filings and tell you precisely what each return should have shown.