Accountants for US and UK: Share Warrants in UK Placings

An American subscribing for share-and-warrant units in a UK placing holds two assets under both tax systems. The IRS splits the unit price by relative fair value, taxes nothing on exercise and allows a loss on lapse; HMRC treats the warrant as an option whose cost merges into the shares. Accountants for US and UK reconcile the two.

Placings by UK listed and growth-market companies routinely come with a "sweetener": for every share subscribed, the investor also receives a warrant, or a fraction of one, to subscribe for a further share at a fixed price for two to five years. For a wealthy American investor the commercial terms are simple. The tax record-keeping is not. At Jungle Tax we prepare both the US and the UK return for clients holding these instruments, and the same handful of errors appears again and again: the whole subscription price loaded onto the shares, the warrant carried at nil, a lapse never reported, and a sterling gain simply translated into dollars at the year-end rate. This guide sets out what each return should actually show.

It deals only with investor warrants acquired for cash in a fundraising. Warrants or options received for services follow entirely different, compensation-based rules and are outside its scope, as are exchange-traded option contracts.

What is an investor warrant in a UK placing?

A warrant is a right, issued by the company itself, to subscribe for new shares at a fixed exercise price during a fixed period. In a unit placing the investor pays a single price and receives a share and a warrant together. The two then separate: the share can be sold while the warrant is kept, the warrant may or may not be transferable, and it may or may not be admitted to trading in its own right.

Three features of the instrument drive the tax result and should be taken from the warrant instrument before anything is computed:

• Was anything separately paid for the warrant? Usually not; one unit price covers both, so the cost has to be apportioned.
• Is the warrant itself listed on a recognised stock exchange? This matters a great deal for UK purposes on lapse and on sale, as explained below.
• How can it be exercised? Cash exercise, a "cashless" net-share exercise, an accelerated expiry if the share price exceeds a trigger, or an adjustment to the exercise price each carry different consequences.

How does the IRS treat a unit of shares and warrants?

Allocating the purchase price by relative fair value

For US federal income tax purposes a unit is not one asset. The amount paid is allocated between the share and the warrant in proportion to their fair market values on the date of acquisition, and each component takes its own basis. Where the warrant is thinly traded or unlisted, fair value has to be estimated, normally with an option-pricing model using the exercise price, term, share price and volatility at the placing date. The company's own accounting allocation is a useful cross-check but is not binding on the investor.

Getting this wrong has a predictable effect. If the entire price sits on the shares, the gain on a later sale of those shares is understated, and the warrant has no basis to carry into the exercise shares or to claim as a loss on expiry. The errors offset over time only if everything is eventually sold, and they land in the wrong years and at the wrong rates.

Is exercising a warrant a taxable event in the US?

A cash exercise of an investment warrant is not a taxable event. The investor is simply buying stock. The basis of each share acquired is the exercise price paid plus the basis allocated to the warrant. The point most often missed is the holding period: under Internal Revenue Code section 1223, the holding period of stock acquired by exercising a right to acquire it starts at exercise and does not include the time the warrant was held. A warrant held for three years and exercised in March produces shares that are short-term property until the following March.

That creates a genuine planning-free, but compliance-critical, distinction. A warrant held for more than a year and sold generates long-term gain. The same warrant exercised, with the shares sold a week later, generates short-term gain taxed at ordinary rates of up to 37%, rather than the 20% top long-term rate, in each case before the 3.8% net investment income tax. The return has to reflect what actually happened.

A cashless exercise, where warrants are surrendered for a smaller number of shares with no cash paid, is less settled. It may be treated as a non-taxable exchange or as a taxable disposal of part of the warrant holding, depending on the terms. We document the position taken rather than assume the benign answer.

Lapse, sale and the wash sale rules

If the warrant expires unexercised, section 1234 treats it as sold for nothing on the expiry date. The result is a capital loss equal to the basis allocated at the outset, short-term or long-term according to how long the warrant was held. It is reported on Form 8949 and Schedule D like any other disposal. Because no broker statement is generated when an unlisted warrant quietly expires, this loss is frequently never claimed. The IRS's general treatment of options, holding periods and wash sales for investors is set out in Publication 550.

A sale of the warrant is a straightforward capital disposal: proceeds less allocated basis. Two further US rules deserve attention:

• Wash sales. Section 1091 disallows a loss on stock where substantially identical stock, or a contract or option to acquire it, is bought within 30 days either side of the sale. Selling placing shares at a loss while acquiring warrants over the same shares, or exercising warrants inside the window, can defer the loss into the basis of the replacement position.
• Exercise-price adjustments. Certain changes to a warrant's exercise price or conversion ratio can be treated as a deemed distribution to the holder under section 305. This is uncommon in a plain placing warrant but should be checked when the terms are amended.

How does HMRC treat a share warrant?

A warrant is an option, and the unit cost must be apportioned

For UK capital gains tax a warrant to subscribe for shares is an option, and an option is a chargeable asset distinct from the shares. HMRC's Capital Gains Manual deals with them as "quoted options to subscribe for shares" from CG55400 onwards, applying section 144 of the Taxation of Chargeable Gains Act 1992.

Where a single price is paid for a share and a warrant, the consideration has to be apportioned between the two on a just and reasonable basis, which in practice means by reference to their respective market values at the time of issue. The result is conceptually the same as the US relative-fair-value method, but it is computed in sterling and is a separate UK computation. The share's portion goes into the section 104 pool for that class of share; the warrant's portion sits outside the share pool as the cost of the option.

Exercise: the warrant cost merges into the shares

Exercising a warrant is not a disposal for UK purposes. Section 144 treats the acquisition of the warrant and the subscription for the shares as a single transaction, so the cost of the new shares is the exercise price plus the apportioned cost of the warrant. The market value rule is disapplied on exercise, so it is the actual exercise price that counts, not the higher market value of the shares on the day.

The new shares are acquired on the exercise date and are identified under the normal share matching rules: same-day acquisitions first, then acquisitions in the following 30 days, then the section 104 pool. An American who sells placing shares and exercises warrants over the same class within 30 days will find the sale matched with the newly exercised shares, not with the pool. That is the UK's rough counterpart to the US wash sale rule, but it works differently, re-matching the cost instead of deferring a loss, so the two returns can diverge on the same pair of transactions. HMRC's helpsheet HS284 explains the matching order.

Abandonment or lapse: why "quoted" matters

This is the point most generalist commentary overlooks. As a general rule, the abandonment of an option is not a disposal for UK capital gains purposes, which means no allowable loss arises. Section 144(4) makes an exception for quoted options to subscribe for shares, along with traded and financial options: for those, abandonment is treated as a disposal and, as HMRC confirms at CG55415, the allowable loss is the amount paid for the option.

A quoted option for this purpose is one listed on a recognised stock exchange. Many placing warrants are not: they are unlisted, often non-transferable, and issued by companies whose shares trade on a growth market. Where the warrant is not a quoted option:

• its lapse will generally produce no UK allowable loss, even though the US return shows a capital loss for the same event; and
• it is not protected from the wasting asset rules, so on a sale of the warrant its allowable cost is written down over its life. The restriction does not apply on exercise, where the full apportioned cost merges into the shares.

The practical consequence is that an in-the-money unquoted warrant is usually better exercised than sold or left to expire from a UK computational standpoint, and that the classification of the warrant must be evidenced on the file, not assumed.

US and UK treatment of placing warrants compared

Event	US (IRS)	UK (HMRC)
Subscription for the unit	Price allocated between share and warrant by relative fair market value, in US dollars at the acquisition-date rate	Price apportioned on a just and reasonable basis, in sterling; share portion joins the section 104 pool
Cash exercise	Not taxable; basis is exercise price plus warrant basis; holding period starts afresh at exercise	Not a disposal; warrant cost merges with exercise price; shares acquired on the exercise date
Sale of the warrant	Capital gain or loss; long-term if held more than one year	Capital gain or loss; wasting asset restriction on cost if the warrant is not quoted
Lapse	Capital loss equal to allocated basis, deemed sale on expiry date	Allowable loss only if a quoted (or traded or financial) option; otherwise no disposal
Loss-matching rule	Wash sale rule, 30 days either side, expressly covers options to acquire	Same-day and 30-day share matching, applied by exercise date
Rate on gains	Up to 20% long-term or 37% short-term, plus 3.8% net investment income tax	18% or 24% depending on income, after the £3,000 annual exempt amount
Passive foreign investment company issuer	Warrant may be treated as stock under the option attribution rule; Form 8621	No equivalent regime for a trading company's shares
Where reported	Form 8949 and Schedule D; Forms 8938, 8621 and 1116 as relevant	Capital gains pages of the Self Assessment return with a computation

What if the issuer is a passive foreign investment company?

Growth-market issuers are disproportionately likely to be passive foreign investment companies (PFICs) for US purposes. A foreign company is a PFIC in any year in which at least 75% of its gross income is passive or at least 50% of its assets, by average value, produce or are held to produce passive income. A pre-revenue explorer, a clinical-stage developer or a cash shell sitting on placing proceeds and earning only deposit interest can meet either test, sometimes for a single year, and "once a PFIC, always a PFIC" generally applies to a shareholder who held during that year unless an election cures it.

The warrant complicates matters in three ways:

• Option attribution. Section 1298(a)(4) provides, to the extent set out in regulations, that a person holding an option to acquire PFIC stock is treated as owning that stock. Under long-standing proposed regulations, a disposal of the warrant is therefore treated as a disposal of PFIC stock, with any gain subject to the excess distribution regime: allocated across the holding period, taxed at the highest ordinary rate for prior years and subject to an interest charge.
• Holding period on exercise. Contrary to the ordinary rule, the same proposed regulations treat the holding period of PFIC shares acquired on exercise as including the period the warrant was held. The exercise shares can therefore be tainted from the placing date.
• Elections. A qualified electing fund election cannot be made in respect of the warrant itself. It can be made for the shares once the warrant is exercised, but unless a purging election is also made the shares remain subject to the excess distribution rules for the pre-election period. The mark-to-market election is framed around marketable stock, and its availability for a warrant should not be assumed.

Each PFIC is reported on its own Form 8621. Whether the unit shares, the warrant and the exercise shares need separate lines, and which election is realistic given the information the company will supply, is a preparation question that has to be settled in the first year, not at exit. None of this has a UK equivalent, so the UK return is unaffected and UK tax paid on an ordinary capital gain may not align in timing or character with the US charge.

The dollar and sterling basis mismatch

The US return is computed in dollars and the UK return in sterling, each translating every leg of the transaction at the rate on its own date. The two gains are therefore never simply the same number in different currencies. A worked illustration, using assumed exchange rates:

• Placing. 100,000 units at £1.00, each one share and one warrant exercisable at £1.30. Fair values at issue of £0.92 per share and £0.12 per warrant give an 88.46% / 11.54% split: £88,462 to the shares and £11,538 to the warrants. At $1.25 to the pound the US bases are $110,577 and $14,423.
• Exercise two years later. £130,000 is paid when the rate is $1.35, a dollar cost of $175,500. UK cost of the exercise shares: £141,538. US basis: $189,923, with a new holding period.
• Sale of the exercise shares 14 months after exercise for £200,000 when the rate is $1.20, or $240,000.

The UK gain is £58,462, which at the sale-date rate is roughly $70,150. The US gain is $50,077. Same shares, same day, a difference of some $20,000 arising purely from currency. In other fact patterns the mismatch runs the other way, and it is entirely possible to have a sterling gain and a dollar loss, or the reverse.

Two further dollar-side points follow. First, sterling held and then spent on the exercise price is itself property for US purposes, and a currency gain or loss can arise on the sterling between the date it was acquired and the date it was spent. Secondly, the foreign tax credit has to bridge two different tax years: UK tax for a year ending 5 April is paid the following January, while the US gain falls in a calendar year. A UK-resident American generally pays UK capital gains tax first and claims a credit on Form 1116 against the US tax on the same gain, relying where needed on the treaty's re-sourcing rule; a US-resident American investing in a UK placing is not normally within UK capital gains tax on the shares at all. Our cross-border tax planning page explains how we sequence the two filings.

What must the two returns show?

The US return

• Form 8949 and Schedule D for each sale of shares or warrants and for each lapse, with dollar basis and the correct holding period for unit shares and exercise shares separately.
• Form 8621 for each PFIC, where applicable.
• Form 1116 for UK tax credited against US tax on the same gain.
• Form 8938 where specified foreign financial assets exceed the filing threshold. Shares and warrants in a foreign issuer held in certificated form, outside any financial account, are reportable in their own right; those held through a UK brokerage account are reported through the account.
• FBAR (FinCEN Form 114) for the UK brokerage and bank accounts where aggregate balances exceed $10,000 at any time in the year. A certificated warrant held directly is not an account and is not an FBAR item.

Our US tax return preparation service covers each of these forms.

The UK return

• The capital gains pages of the Self Assessment return, with a computation showing the apportionment of the unit price, the section 104 pool, and the merged cost on exercise.
• Any allowable loss on the lapse of a quoted warrant, claimed within the time limit for capital losses, which is generally four years from the end of the tax year.
• Translation of any non-sterling legs at the rate on each transaction date.

See our UK tax return service for how we present share computations to HMRC.

What records should a wealthy investor keep?

• The placing letter or subscription agreement and the warrant instrument.
• Evidence of the fair value of the share and the warrant at the issue date, and the allocation adopted for each country.
• Whether the warrant was listed, and on what market, at issue and at expiry.
• Exercise notices, the sterling paid, and the source and acquisition date of that sterling.
• Exchange rates used for each leg, applied consistently.
• For potential PFICs, the company's annual statements on its status and any information statement supporting an election.

Common errors we correct, and how to catch up

The recurring problems are consistent: no allocation to the warrant; exercise shares given the warrant's holding period; a lapse never reported in the US and wrongly claimed in the UK; UK gains translated wholesale into dollars; PFIC status never tested; and directly held warrants omitted from Form 8938. Where these affect earlier years, amended returns are often sufficient. Where income was omitted and international information returns were missed, the IRS streamlined filing compliance procedures may be the right route for a taxpayer whose conduct was non-wilful: three years of returns and six years of FBARs, with no miscellaneous offshore penalty under the foreign offshore procedure and a 5% penalty under the domestic one. Our IRS streamlined filing team prepares those submissions, and on the UK side an unprompted disclosure to HMRC attracts materially lower penalties than one made after an enquiry opens.

We prepare and reconcile the returns; we do not recommend investments or advise on whether to exercise. What we do ensure is that the two sets of figures are consistent, defensible and complete.

Speak to a cross-border specialist

If you hold shares and warrants from a UK placing, or have exercised, sold or let warrants lapse without a clear record of how either country was told, a single preparer working on both returns is the most reliable way to put it right. To arrange a confidential consultation, contact our cross-border team and we will review your placing documents, rebuild the dollar and sterling basis, and bring both returns into line.