Specialist US UK Tax Services for Litigation Finance Investors

Litigation finance returns are hard to classify. For a UK-resident American, the same settlement can be capital gain or ordinary income to the IRS, and a chargeable gain or miscellaneous income to HMRC. Getting both returns right means analysing the agreement itself, timing recognition in each country, claiming foreign tax credits carefully and filing every information return that applies.

This guide is for founders, executives and investors who live in the UK, hold US citizenship or a green card, and have put capital into litigation funding. That might be through a fund or by funding single cases directly. Litigation finance is still a young asset class, and neither tax system has written rules for it. A firm offering Specialist US UK Tax Services earns its fee here. The work is not choosing a favourable label. It is taking a defensible position on two returns that agree with each other, and documenting it well enough to stand up to either tax authority. We set out where the law is settled, where it is not, and what the compliance work involves. This is return preparation and compliance guidance, not investment advice.

Why are litigation finance returns so difficult to tax?

Most investments fit a familiar category. A share pays dividends and produces gains. A bond pays interest. A partnership issues a K-1. Litigation funding fits none of these neatly. The investor usually advances money in exchange for a contingent right: a multiple of capital, a percentage of the recovery, or a mix of the two, payable only if the case succeeds. If the case fails, nothing is paid back.

That contingent, non-recourse feature drives the uncertainty. Depending on how the agreement is drafted, the arrangement can look like a loan, a purchase of part of a claim, a prepaid forward contract, a derivative, or an interest in a joint venture. Each of these is taxed differently in the US and the UK, and the two countries do not have to reach the same answer. Commentators on both sides of the Atlantic agree there is no dedicated legislation, no published HMRC guidance and no settled body of case law that answers the investor's question directly. The return therefore rests on general principles applied to the documents.

Two routes in: fund interests versus direct case funding

Interests in a litigation funding fund

Many investors come in through a pooled vehicle. The vehicle's structure largely decides the tax outcome:

• US limited partnership or LLC taxed as a partnership. You receive a Schedule K-1. Character is decided at the fund level and flows through, so the fund's own characterisation drives your US return. In the UK, a partnership is generally transparent, and you must work out your share of the underlying income and gains under UK rules. Those rules may not follow the K-1's labels.
• UK or other non-US partnership. The same flow-through analysis applies, plus foreign partnership reporting on Form 8865 if you meet the ownership or contribution thresholds discussed below.
• Offshore company. A non-US corporate fund raises passive foreign investment company (PFIC) issues for US purposes, covered in a short section below. In the UK, it may also fall within the offshore fund rules.

Direct single-case funding agreements

Some sophisticated investors fund individual cases directly, often through a special purpose vehicle or a bilateral agreement. In that case you carry the characterisation question personally. The agreement's wording on recourse, security, repayment priority, any control over the litigation, and what exactly you are buying becomes the main evidence for your filing position in both countries.

How does the IRS characterise litigation finance returns?

US practitioners usually analyse funding agreements under one of several frameworks. None is officially endorsed, and the outcome depends on the facts.

Loan treatment

If the advance is in substance a loan, meaning repayment is expected regardless of outcome or the investor has real recourse, the return looks like interest. That is ordinary income, potentially accrued under original issue discount principles before any cash arrives. This can create phantom income: tax on amounts you may never collect. A later write-off may then produce a capital loss that does not cleanly offset the ordinary income already reported. Most litigation funding is non-recourse precisely to avoid loan treatment, but recourse features or guarantees in the documents can bring it back.

Purchase of a contract right or prepaid forward

Many agreements are drafted as the acquisition of a right to a share of the proceeds, sometimes as a prepaid forward contract. Under this framework the investor holds a capital asset, and a successful resolution may produce capital gain. Long-term treatment is available if the holding period exceeds one year. However, collecting on a contract right is not automatically a "sale or exchange." Whether section 1234A, which treats the cancellation, lapse or termination of certain rights as a sale, applies to the settlement of a funding agreement is a contested point. Commentators have noted IRS scepticism about it. Flag: this area is unsettled, and a capital position needs careful documentation.

Partnership or joint venture

Where the investor and the claimant or law firm share profits and risk, the arrangement can be recharacterised as a partnership for tax purposes. The investor's share then carries the character of the underlying recovery. That character can be ordinary, for example if the case recovers lost profits, or tied to fee income that is ordinary in the law firm's hands.

When is the income recognised?

Timing is the second US question. Under contract-right or forward analysis, gain is generally recognised when the case resolves and the amount becomes fixed, not when you sign. A settlement paid in instalments, an appeal, or a judgment that is awarded but not yet collected can each shift the recognition year. For a calendar-year US taxpayer whose UK tax year runs from 6 April to 5 April, a settlement in February falls in one US year but straddles two UK years. That matters for the foreign tax credit.

Capital gain or ordinary income can mean a difference of up to roughly 17 percentage points at the top federal rate, before the 3.8% net investment income tax. Settled US income is generally net investment income however it is characterised. The IRS position is that foreign tax credits do not reduce the net investment income tax.

How does HMRC characterise litigation finance returns?

UK law starts from a different question: is the return income or capital? It then asks which part of the tax code catches it.

Chargeable gain

A contractual right to share in case proceeds is a form of intangible property, and UK capital gains tax can apply to assets of that kind. If your right is an asset you acquired for a price, the resolution of the case may be a disposal, or a capital sum derived from the asset, giving a chargeable gain. UK capital gains tax rates for individuals are currently 18% and 24%, and the annual exempt amount is £3,000.

Miscellaneous income

The UK income tax rules include a residual charge on income not taxed elsewhere. HMRC could argue that a return structured as a fixed multiple of the amount funded, or as a payment for taking on risk, is income in nature. It would then be taxed at income tax rates of up to 45%, and losses would be far less flexible.

Interest and loan relationships

If the arrangement is a loan in substance, the premium may be taxed as interest or as a deeply discounted security return. In that case a failed case may give no capital loss at all, because losses on simple debts are generally not allowable for capital gains tax.

Trading

Someone who funds cases repeatedly, at scale and with organised activity, risks being treated as trading. All profits would then be income. Most private investors are well short of this, but frequency and organisation matter.

US versus UK treatment at a glance

What happens to the tax position when a case fails?

Losses are where the asymmetry hurts most, and competitor material rarely covers them. In the US, if you hold a capital asset that becomes worthless, you generally take a capital loss in the year the loss becomes fixed. For an individual, net capital losses offset only $3,000 of ordinary income each year, with the rest carried forward. Proving worthlessness, as opposed to a case that is merely delayed or on appeal, needs evidence: a final judgment, a dismissal, or a documented abandonment. If you hold through a partnership, the loss arrives on the K-1, subject to basis, at-risk and passive activity limits.

In the UK, a capital loss on an asset that has become worthless can be claimed through a negligible value claim, which can sometimes be dated back. A loss on a right taxed as miscellaneous income, however, can generally be set only against other miscellaneous income. A loss on a simple debt may not be relievable at all. So if you take inconsistent positions, such as capital in one country and income in the other, you can end up taxed on winners at income rates in one jurisdiction and unable to use losers in the other. Consistency across the portfolio, documented case by case, is the main protection.

PFIC: a brief word on offshore corporate funds

If your interest is in a non-US corporation whose income is mainly passive, it is likely to be a PFIC. Without a qualified electing fund or mark-to-market election, gains and excess distributions are taxed at the highest ordinary rate with an interest charge, and Form 8621 is usually required each year. Ask the fund early whether it provides a PFIC annual information statement. In the UK, the same vehicle may be an offshore fund, and without reporting fund status its gains are taxed as income. That is a double penalty a well-chosen structure would avoid.

Which US information returns apply?

Information reporting turns on what you hold, not on how the income is characterised. Report only where an account or interest actually qualifies, and do not over-file.

• Form 8865. Required if you hold an interest in a foreign partnership and meet one of the filing categories. For example, you own 10% or more, or you contribute property, including cash, worth more than $100,000 within a 12-month period. Penalties for failing to file start at $10,000 per form per year. See IRS guidance on Form 8865.
• Form 8938. Interests in foreign partnerships and certain contracts held for investment with a non-US counterparty can be specified foreign financial assets. Taxpayers living abroad file when assets exceed $200,000 at year end or $300,000 at any point in the year, if single, and $400,000 or $600,000 if married filing jointly. See IRS guidance on Form 8938.
• FBAR (FinCEN Form 114). Required where the aggregate maximum value of foreign financial accounts exceeds $10,000 at any time in the year. A bilateral funding contract is generally not a financial account, but a foreign custody, escrow or pooled-fund account you have an interest in, or signature authority over, may be. Our FBAR penalty calculator shows the exposure if years were missed.
• Form 8621. Required for PFIC holdings as noted above.

Foreign tax credits and sterling conversion

UK tax paid on a litigation finance return can usually be credited against US tax on the same income under the US-UK income tax treaty and the foreign tax credit rules. Several practical traps exist:

• Character mismatch. If the IRS sees capital gain and HMRC sees income, the foreign tax credit basket and sourcing rules may still allow a credit, but you must work through the treaty's resourcing provisions to avoid excess credits in one basket and uncredited tax in another.
• Timing mismatch. The UK tax year ends on 5 April. A gain recognised in the US in year one may be taxed in the UK in a later year. Credit carryback and carryforward rules, and the choice between the accrual and paid methods, decide whether the credit lines up.
• Net investment income tax. As noted above, the IRS does not allow foreign tax credits against it. Model this cost separately.
• Currency. Gains must be computed in US dollars. Convert the amount funded at the exchange rate on the date you paid it and the proceeds at the rate on the date received. If the pound has moved, the dollar gain can differ significantly from the sterling gain HMRC sees, and in some cases you can have a US gain with a UK loss, or the reverse.

The UK side has its own rules, so UK tax services and US tax services need to be handled together rather than by two firms who never compare notes.

Records every litigation finance investor should keep

The characterisation argument is won or lost on paper. Keep:

• The signed funding agreement, all amendments, and any side letters covering recourse, security, priority or control.
• Subscription documents, partnership agreements, offering memoranda and every K-1 or UK partnership statement.
• Bank evidence of each capital call or advance, with the date, amount, currency and exchange rate.
• Case milestone notices: judgment, settlement, appeal, dismissal or abandonment, with dates.
• Distribution notices showing how each payment splits between return of capital and profit.
• Any PFIC annual information statements and fund confirmations of reporting fund status.
• A short written memo, prepared when the return is filed, setting out the characterisation position taken in each country and why.

How can you correct missed or incorrect years?

Investors often discover the issue late. A K-1 arrives that nobody reported, a Form 8865 was never filed, or a settlement was reported as capital in the UK and ignored in the US. The route depends on the facts.

US options

• Streamlined Foreign Offshore Procedures. For non-wilful failures by taxpayers who meet the non-residency test, you file three years of amended or late returns and six years of FBARs, with no miscellaneous offshore penalty. See the IRS streamlined filing compliance procedures and our IRS streamlined filing experts.
• Delinquent international information return submission. Where all income was reported but a form such as Form 8865 or Form 8938 was missed, a reasonable-cause submission may be appropriate.
• Delinquent FBAR submission. For FBARs missed where no tax is owed and the income was reported.

UK options

If UK income or gains went unreported, you can amend recent returns, or make a voluntary disclosure through HMRC's Digital Disclosure Service for older years. How far back HMRC can assess depends on whether the error was innocent, careless or deliberate, and making the disclosure before HMRC asks reduces penalties. Where the unreported amounts are offshore, as they often are with a US-domiciled fund or a foreign case, the Worldwide Disclosure Facility is usually the right route. HMRC's guide to making a disclosure sets out the process.

The two corrections should be prepared together. A US amendment that changes character, or a UK disclosure that adds tax, changes the foreign tax credit, and both must tie back to one consistent set of computations.

A worked illustration

Take a UK-resident US citizen who, in 2023, funds a single commercial case directly with £500,000 under a non-recourse agreement giving them a share of proceeds. The case settles in March 2026, and they receive £1.25 million in April 2026.

• US: If the right is treated as a capital asset and the fixed settlement is accepted as producing gain, the dollar gain is calculated using the exchange rates at each date. It is held for more than a year, and the long-term rates and the 3.8% net investment income tax apply. Recognition may fall in 2026, or arguably earlier if the settlement became fixed and unconditional in March. That is a judgement to document.
• UK: If treated as a chargeable gain, the £750,000 gain falls in 2025-26 or 2026-27, depending on when the capital sum is derived. If HMRC were to treat it as miscellaneous income, income tax rates would apply instead.
• Credit: UK tax is credited against US tax on the same gain, subject to the timing and basket rules. The net investment income tax remains payable.

Even this simple case involves several judgement calls. A portfolio of a dozen cases, some through funds and some direct, multiplies them, which is why investors increasingly use US UK tax accountants who prepare both returns from one file.

How Jungle Tax supports litigation finance investors

Jungle Tax prepares US and UK returns for high-net-worth Americans living in Britain, including those with alternative assets that do not fit the standard categories. For litigation finance investors, that means reading the agreement before choosing a filing position. It also means reconciling K-1s with UK partnership computations, applying consistent characterisation across both returns, filing only the information returns that genuinely apply, and correcting earlier years through the right programme where needed. We do not advise on whether to invest. We make sure the investments you hold are reported correctly and defensibly. For related cross-border reporting questions, see our cross-border tax resources and wider guides.

If you hold litigation finance interests and are unsure whether your US and UK returns tell the same story, or whether forms have been missed, contact our cross-border team for a confidential consultation. We will review your agreements and filing history and set out a clear plan to bring both returns into line.