How do I show the exchange rate on Form 5471, dollars per pound or pounds per dollar?

Pounds per dollar. The Instructions for Form 5471 require every exchange rate to be reported using a divide-by convention, meaning the units of foreign currency that equal one US dollar, rounded to at least four decimal places. The instructions expressly say not to report the number of dollars that equal one unit of foreign currency. For sterling the figure you enter will be less than one. Use more than four places if four would materially distort the dollar amount.

Do I translate the UK accounts first and then compute earnings and profits?

No, and reversing the order is the most common cause of a return that cannot be reconciled. Compute earnings and profits in sterling, applying US tax principles to the sterling statutory figures, then translate once. Schedule H is designed this way: the current-year adjustments are made in functional currency and only the final result crosses into dollars at the average exchange rate, with the rate disclosed on the schedule itself.

Why does my dividend from the UK company create a US gain when nothing changed in sterling?

Because previously taxed earnings entered income at the average rate for the year of inclusion, while the actual distribution is translated at the spot rate on the date it is paid. Section 986(c) treats the difference as ordinary gain or loss, sourced with the original inclusion. Sterling strengthening between the two dates creates a taxable gain on earnings already taxed. It is only computable if the dollar PTEP layers were recorded at the original inclusion rate.

My UK accounts are presented in US dollars. Does that change the Form 5471?

Not by itself. Under FRS 102 the presentation currency in the filed accounts is a free choice and need not match the functional currency, and HMRC guidance at CFM64110 confirms that corporation tax profits are computed by reference to the functional currency whatever the presentation currency. If the functional currency is sterling, the Form 5471 is built on sterling and the accounting translation in the filed accounts is a separate calculation that will not agree with the tax translation.

Form 5471 Functional Currency: UK Company in Sterling

Q: Is the functional currency of my UK limited company sterling or US dollars for Form 5471?

For a UK company that invoices, pays and keeps its books in sterling, the functional currency is sterling. Section 985 makes the dollar the default but gives a qualified business unit the currency of the economic environment in which a significant part of its activities are conducted and in which it keeps its books. Incorporation in England and Wales is not the test; the books and the economics are. Document the analysis in year one and revisit it only if the facts change.

Q: Where do I get the average sterling exchange rate for the year?

The IRS publishes yearly average currency exchange rates, including the British pound, at irs.gov/individuals/international-taxpayers/yearly-average-currency-exchange-rates. The same page states that the IRS has no official exchange rate and generally accepts any posted rate used consistently. Whichever source you use, record it in a rate log with the date taken and apply it consistently across the schedules and across years, because consistency is what an examiner tests.

On a Form 5471 for a UK limited company, the functional currency is almost always pounds sterling, and that single determination decides which columns of which schedules you complete, which exchange rate converts them, and whether the dollar figures will tie to the shareholder's Form 1040. Functional currency is defined in section 985: it is the US dollar by default, except that for a qualified business unit it is the currency of the economic environment in which a significant part of the unit's activities are conducted and which the unit uses in keeping its books and records. A company incorporated in England and Wales that invoices in sterling, pays its people in sterling and files sterling accounts at Companies House has a sterling functional currency. Everything else on the form follows from that.

The error we correct most often in returns we take over is not the determination itself. It is one of two opposite assumptions: that because the accounts are in sterling the whole form can be in sterling, or that everything must be converted to dollars before anything is entered. Neither is right. The form deliberately mixes the two, and the current Instructions for Form 5471 at irs.gov/instructions/i5471 tell you, schedule by schedule, which is which. What follows is the map, the rates, and the reconciliation discipline that keeps the dollar columns defensible from one year to the next.

What does functional currency mean under section 985?

Functional currency is the single currency in which a taxpayer or a qualified business unit makes all of its US income tax determinations. Section 985(a) states the rule plainly: all determinations under the income tax provisions are made in the taxpayer's functional currency. Section 985(b) then supplies the default and the exception. The default is the dollar. The exception is the qualified business unit, whose functional currency is the currency of the economic environment in which a significant part of its activities are conducted and in which it keeps its books. A qualified business unit that primarily conducts its activities in dollars has a dollar functional currency notwithstanding where it is incorporated, and there is a statutory election to use the dollar where the unit keeps its books in dollars or uses a method of accounting that approximates a separate transactions method.

For a UK operating company the analysis is usually short, and the factors that decide it are the ones a preparer can evidence from the client's own records:

The currency in which the company invoices customers and sets its prices.
The currency in which its labour, premises and material costs are incurred and settled.
The currency of the market whose competitive and regulatory forces determine its selling prices.
The currency in which its financing is denominated and in which receipts are retained.
The currency in which the company actually maintains its books and records, which is the point the statute keeps returning to.

Note that the US test and the UK test point at the same thing but sit in different statutes. HMRC guidance in the Corporate Finance Manual at gov.uk/hmrc-internal-manuals/corporate-finance-manual/cfm64110 defines functional currency, by reference to CTA 2010 section 17(4), as the currency of the primary economic environment in which the company operates, and confirms that whatever presentation currency the accounts use, corporation tax profits must be computed by reference to the functional currency. Under FRS 102 the presentation currency in the filed accounts is a free choice and does not have to be the functional currency, and the filing rules for those accounts are at gov.uk/government/organisations/companies-house. So a US owner can be handed a set of accounts presented in dollars for a company whose functional currency is sterling, and the Form 5471 still has to be built on sterling. Read the accounting policies note before you accept the currency on the face of the statements.

One rule you can normally park: the dollar approximate separate transactions method, or DASTM, applies to units operating in hyperinflationary currencies. Sterling is not one, so a UK trading company does not use it. It matters only if the UK company itself holds a subsidiary or branch in a hyperinflationary economy.

Is a UK limited company a qualified business unit under section 989?

Section 989(a) defines a qualified business unit as any separate and clearly identified unit of a trade or business of a taxpayer that maintains separate books and records. A foreign corporation carrying on a trade or business is itself a qualified business unit, which is why a trading UK limited company gets a sterling functional currency rather than inheriting its US shareholder's dollar. The concept matters for a second reason. A qualified business unit can sit inside the UK company. If the UK company runs a genuine trade or business through a branch in another country, keeps separate books for it, and that branch operates in a different currency, you have a second qualified business unit with its own functional currency, and Schedule G of Form 5471 asks about exactly that. That is where section 987 enters, dealt with in outline below.

A dormant or purely passive UK company that keeps no real books of a trade or business is a different case, and the qualified business unit label may not fit. In practice we still prepare the return on sterling where sterling is the currency of the company's only accounts, and we document why.

Which Form 5471 schedules use sterling and which use US dollars?

This is the reference nobody publishes in one place, and the reason preparers get it wrong. The instructions are organised by schedule, so the currency rule for each one is stated in a header note on the schedule itself and in that schedule's instructions, never as a single list. Here is the map for the schedules a US owner of a UK company actually files. Treat it as an orientation and always read the note printed at the top of each schedule on the revision you are filing, because the IRS moves these between revisions.

Page 1 and Schedule A, stock of the foreign corporation: no monetary amounts of substance, but Schedule A drives who files and which schedules follow.
Schedule B, US shareholders: identifying information, no currency translation.
Schedule C, income statement: both currencies. The information is reported in functional currency in accordance with US GAAP, and each amount is also reported in US dollars translated from functional currency. If the functional currency were the dollar, only the dollar column is completed. For a sterling company you complete both columns for every line.
Schedule F, balance sheet: US dollars, prepared and translated in accordance with US GAAP. This is the schedule that most often breaks a reconciliation, because a GAAP balance sheet translation does not use one single rate for everything.
Schedule E, income, war profits and excess profits taxes paid or accrued: mixed by column. The schedule captures the currency in which the tax is payable, the amount of tax in that currency, the conversion rate applied, and the resulting dollar amount. The instructions state that when translating amounts to be reported on Schedule E you must generally use the average exchange rate as defined in section 986(a).
Schedule E-1, taxes paid, accrued or deemed paid on E&P: US dollars.
Schedule H, current earnings and profits: functional currency for the computation, dollars for the answer. The current-year E&P build is done in sterling on lines 1 through 5c, the sterling result is then translated into dollars at the average exchange rate, and the rate used is disclosed on the schedule itself.
Schedule I-1, information for global intangible low-taxed income: functional currency, with the amounts feeding the dollar computation translated at the average rate for the CFC's year and the rate disclosed.
Schedule J, accumulated earnings and profits of a controlled foreign corporation: functional currency. The accumulated E&P pools are tracked in sterling.
Schedule P, previously taxed earnings and profits of a US shareholder: both. Part I states the PTEP in the foreign corporation's functional currency and Part II states the same PTEP in US dollars.
Schedule M, transactions between the CFC and shareholders or other related persons: US dollars, translated from functional currency at the average exchange rate for the foreign corporation's tax year, with the functional currency and the rate disclosed on the schedule.
Schedule Q, CFC income by CFC income groups: functional currency unless the schedule notes otherwise, with foreign taxes tying back to the dollar amounts on Schedule E.
Schedule R, distributions from the foreign corporation: functional currency. The columns ask for the amount of the distribution and the earnings and profits out of which it was made in the foreign corporation's functional currency. The dollar translation of that dividend does not go on Schedule R at all; it goes into your workpapers and onto the shareholder's return.

The pattern, once you see it, is consistent. Anything that is a measurement of the foreign corporation's own economics stays in sterling: current E&P, accumulated E&P, PTEP pools, income groups, distributions. Anything that has to interact with the US tax system, or that a US examiner will compare with a US return, is stated in dollars: the balance sheet, the tax pools, related-party transactions, and the second column of the income statement. The schedules that straddle both worlds, C, H, I-1, P, are the ones with a disclosed exchange rate on the face of the form. That disclosed rate is the hinge, and it is the first thing an examiner looks at.

Which exchange rate applies, and where does the IRS publish it?

The IRS states on irs.gov/individuals/international-taxpayers/yearly-average-currency-exchange-rates that it has no official exchange rate and generally accepts any posted exchange rate that is used consistently. The general rule is the spot rate prevailing when an item is received, paid or accrued, with an exception for qualified business units that are permitted to use a foreign currency. That same page publishes yearly average rates for a list of currencies including the British pound, and it is the source most preparers use for the average rate on a Form 5471. The companion guidance at irs.gov/individuals/international-taxpayers/foreign-currency-and-currency-exchange-rates sets out the spot rate rule and the qualified business unit exception in the same terms. We do not quote a year's rate in this article on purpose. Pull the figure from that page for the year you are filing, and record where you took it from.

Section 989(b) supplies the statutory answer for the rate that applies to each kind of amount:

An actual distribution of earnings and profits uses the spot rate on the date the distribution is included in income.
An inclusion under section 951(a)(1)(A), which is subpart F income, uses the average exchange rate for the foreign corporation's taxable year.
Amounts of any other qualified business unit use the average exchange rate for that unit's taxable year.
A deemed dividend on a section 1248 disposition uses the spot rate on the date the deemed dividend is recognised.

Then there is the presentation rule that catches out more preparers than any substantive point. The Instructions for Form 5471 require all exchange rates to be reported using a divide-by convention rounded to at least four places: the rate must be reported as the units of foreign currency that equal one US dollar, and the instructions expressly say not to report it as the number of US dollars that equal one unit of foreign currency. For sterling that means you show a figure that is less than one, because a pound buys more than a dollar. Preparers who type the familiar dollars-per-pound market quote have inverted the rate, and every translated figure on the schedule is then wrong by the square of the error. The instructions also require more than four decimal places where four would materially distort the rate or the dollar equivalent.

How sterling earnings and profits become dollars on Schedule H

The sequence matters, and getting it backwards is the single most expensive habit we see. You do not translate the UK profit and loss account into dollars and then compute earnings and profits from the dollar figures. You compute earnings and profits in sterling, applying US tax principles to the sterling accounts, and you translate once at the end. That is why Schedule H is built the way it is: the adjustments for depreciation differences, non-deductible items, capital allowances against US depreciation, pension and share scheme timing, and the rest are all made in the functional currency on lines 1 through 5c, and only the final current E&P figure crosses into dollars at the average rate, with the rate disclosed.

Translating first and adjusting afterwards produces a number that cannot be reconciled to anything. Every US tax adjustment is then embedded in a dollar figure that was translated at a rate chosen for a different purpose, and by year three nobody can explain the accumulated E&P on Schedule J. Keep the sterling column as the master record. The dollars are a derived output, not the working file.

Translating UK corporation tax under section 986 for Schedule E

Section 986(a) governs the translation of foreign income taxes. Accrued foreign income taxes are translated using the average exchange rate for the taxable year to which the taxes relate. There are exceptions, and UK payment timing walks straight into two of them. Taxes paid more than two years after the close of the year to which they relate, and taxes paid before the beginning of that year, do not get the average rate; they are translated at the rate on the date of payment. Taxes denominated in a currency other than the functional currency are subject to a further election. Sterling corporation tax paid by a sterling company is functional-currency tax, which keeps it simple, but the payment dates still need watching.

UK corporation tax is normally payable nine months and one day after the end of the accounting period, and larger companies pay by quarterly instalments; the payment rules are set out at gov.uk/pay-corporation-tax. Instalments straddle the year end, so a single year's UK tax charge can be settled across two calendar years of exchange rates.
A UK amended return, a research and development claim settled late, or a group relief adjustment can move tax years after the event. If the resulting payment falls outside the section 986(a) window, the average rate is no longer available for it.
The individual shareholder's own Form 1116 uses a different convention again. The Instructions for Form 1116 at irs.gov/instructions/i1116 require foreign taxes actually paid to be translated at the rate in effect on the day the tax was paid or withheld, with the average rate applying to accrued taxes subject to the same exceptions. A dollar figure that is correct on Schedule E is not automatically the dollar figure that belongs on Form 1116.

Distributions, PTEP and the section 986(c) exchange gain

Here is where a sterling company generates a US tax item out of nothing but the calendar. Subpart F and GILTI inclusions are brought into income at the average rate for the CFC's year. The sterling that was taxed then sits in the company as previously taxed earnings and profits, tracked in sterling on Schedule J and in both currencies on Schedule P. When it is actually distributed, the distribution is translated at the spot rate on the date of distribution. Section 986(c) treats the difference between the two rates as ordinary gain or loss, sourced in the same way as the underlying inclusion. Sterling strengthening between the year of inclusion and the year of distribution produces a taxable gain on money that was already taxed. Sterling weakening produces a loss.

This is why the PTEP schedules have to be maintained in sterling as the master and in dollars as the derived column, layer by layer and year by year. If the dollar PTEP layers were never recorded at the rate used for the original inclusion, there is no way to compute the section 986(c) result when the dividend is finally paid, and no way to prove the shareholder is not being taxed twice on the same earnings.

Section 988: currency gains inside a sterling company

A sterling functional currency does not mean sterling is the only currency in the company. Section 988 applies to transactions denominated in, or determined by reference to, a currency other than the taxpayer's functional currency. For a UK company that means euro trade debtors, a dollar bank balance, a dollar-denominated intercompany loan, a forward contract, or a euro supplier liability. Each of those is a nonfunctional currency item, and movements between the booking date and the settlement date produce section 988 gain or loss that is generally ordinary and that has to be reflected in the sterling earnings and profits computation before anything is translated.

The practical difficulty is that FRS 102 already puts an exchange difference through the UK profit and loss account for the same items, computed on the accounting convention. The two figures are related but not identical, and the difference is a Schedule H adjustment made in sterling. UK companies with US or eurozone customers, and companies holding dollar cash after a fundraising, are the ones where this bites hardest. It is invisible in a set of statutory accounts, because the accounts report a single net exchange difference line.

Section 987 in outline: when the UK operation has a branch

Section 987 deals with the taxable income and currency gain or loss of a qualified business unit whose functional currency differs from that of its owner. If the UK limited company operates through a branch abroad that keeps separate books in a different currency, that branch is a section 987 qualified business unit of the UK company. Income of the branch is computed in the branch currency and translated, and remittances from the branch to the UK head office can trigger recognised currency gain or loss. Treasury and the IRS finalised a substantial body of section 987 regulations in December 2024, and the mechanics are detailed enough that they belong in their own engagement rather than in a paragraph.

For most owners of a straightforward UK trading company, section 987 never engages, because there is only one qualified business unit and one currency. It engages the moment the UK company opens a properly booked overseas branch, and Schedule G of Form 5471 asks the question that surfaces it. Answering that question carelessly is how a section 987 exposure stays buried for years.

Why sterling statutory accounts will not tie to the Form 5471 dollar columns

This is the failure mode we are called in to unpick, and it is worth naming precisely. The UK company files one set of sterling accounts at Companies House. Those sterling figures are stable and auditable. The dollar columns on the Form 5471 built from them are not, and a client who tries to compare this year's dollar figures with last year's, or with the accounts, concludes that the return is wrong when it may be perfectly correct. Six mechanisms cause the drift:

Rate choice drift. The average rate changes every year, so an identical sterling profit produces a different dollar profit each year. Dollar movement that looks like trading performance is currency.
Mixed rates within one form. Schedule H uses an average rate, the Schedule F balance sheet is translated on GAAP conventions rather than a single rate, Schedule R stays in sterling, and Schedule M uses the average rate. Four schedules, four bases, one company.
Prior-year E&P restatement. When a UK amended return, a late R and D claim or an audit adjustment changes a prior year's sterling profit, the sterling E&P for that year moves and the dollar figure has to be restated at that year's rate, not the current rate.
Mid-year distribution rates. A dividend translated at a spot rate on its payment date will never agree with the average-rate dollar E&P it came out of. That gap is not an error; it is the section 986(c) item.
Inverted or re-rounded rates. Switching between dollars per pound and pounds per dollar, or rounding the rate to two places, breaks the tie in a way that is very hard to trace backwards from the dollar figure alone.
Presentation currency confusion. If the UK accounts are presented in dollars while the functional currency is sterling, the accounting translation in the filed accounts is a different calculation from the tax translation on the Form 5471, and the two will not agree.

The working papers we keep so the numbers survive an IRS examination

The defence against all six is documentary, and it is cheap to build at the time and expensive to reconstruct three years later. The currency file we maintain alongside every UK company Form 5471 contains the following:

A functional currency memorandum for the first year, recording the section 985 and section 989 analysis, the evidence relied on, and the accounting policies note from the UK accounts. It is refreshed only when the facts change.
A sterling master computation: UK statutory profit, every US tax adjustment, and current earnings and profits, all in sterling, agreeing line for line to the accounts filed at Companies House.
A single rate log for the year, showing each rate used, what it converts, its source, the date it was taken, and the number of decimal places, all expressed as pounds per one US dollar to match the divide-by convention on the form.
A translation bridge showing exactly where the sterling master crosses into dollars for each schedule, so that any dollar figure on the form can be traced to a sterling figure and a named rate.
A PTEP layer schedule by year and by category, in sterling and in dollars, with the rate used for each layer preserved, so the section 986(c) computation is possible whenever a distribution is made.
A section 988 register of nonfunctional currency items held during the year, with the accounting exchange difference and the tax figure shown separately and the difference explained.
A UK tax payments schedule listing each corporation tax payment, its date, the accounting period it relates to, and the rate applied, so that the section 986(a) exceptions can be tested rather than assumed.
A year-on-year bridge in dollars separating movement caused by trading from movement caused by the exchange rate, which is the document that stops the client's own question before it starts.

A worked illustration

The following figures are an illustration only, and the exchange rates are assumed for the example rather than taken from any published year. Assume a UK trading company owned wholly by a US citizen resident in London, with current earnings and profits computed in sterling under US tax principles of 1,000,000 pounds. Assume the average rate for the year, expressed on the divide-by convention required by the form, is 0.7800 pounds to one US dollar. Schedule H lines 1 through 5c are completed in sterling, and current E&P in dollars on line 5d is 1,000,000 divided by 0.7800, or 1,282,051. The rate 0.7800 is disclosed on the schedule.

Now assume 400,000 pounds of that year's earnings was a subpart F inclusion, so it entered income in dollars at the same average rate, 512,821 dollars, and became previously taxed earnings and profits tracked in sterling on Schedule J and in both currencies on Schedule P. Two years later the company pays that 400,000 pounds out as a dividend when the assumed spot rate is 0.7500 pounds to one dollar. Schedule R reports the distribution as 400,000 pounds, in functional currency, and does not show a dollar figure. The shareholder's return, however, translates the distribution at the spot rate, 533,333 dollars, and the 20,512 dollar difference between 533,333 and the 512,821 originally included is a section 986(c) exchange gain, ordinary and sourced with the original inclusion. Nothing about the company's sterling position changed. The entire item is currency, and it is only visible because the dollar PTEP layer was recorded at the rate used for the inclusion.

How the dollar figures tie to Form 1040, Form 1116 and GILTI

The Form 5471 is an information return, but its dollar figures are the inputs to real tax. The subpart F and GILTI inclusions computed from sterling E&P and translated at the average rate land on the shareholder's Form 1040 and, for GILTI, run through Form 8992. UK corporation tax translated under section 986(a) supports the foreign tax credit, which for an individual is claimed on Form 1116 using the payment-date or average-rate convention set out at irs.gov/instructions/i1116. The distribution translated at the spot rate, and any section 986(c) gain, hit the same return in the year of payment. Where a shareholder has made a section 962 election, the dollar figures also drive the deemed-paid credit computation, which is why the Schedule E tax pools are stated in dollars.

Every one of those numbers has to be traceable to a sterling figure and a named rate. An examiner comparing the Form 1040 inclusion with Schedule H line 5d, or the Form 1116 credit with Schedule E, is performing exactly the tie-out your rate log was built to answer. Where the tie fails, the conversation stops being about currency and starts being about accuracy-related penalties and, if a schedule is materially incomplete, about the Form 5471 penalty regime described at irs.gov/forms-pubs/about-form-5471.

How we prepare the currency file

We prepare Form 5471 for US owners of UK limited companies as a compliance engagement built on the sterling accounts, not as a translation exercise bolted onto a US return. The sequence is fixed: establish and document functional currency, rebuild earnings and profits in sterling under US tax principles, translate once per schedule at a rate we can source and evidence, and hand the client a bridge that explains every dollar movement. Details of the corporate work sit at us-uktax.com/business-corporate-tax-planning, the wider planning position at us-uktax.com/cross-border-tax-planning, and the US filing side at us-uktax.com/us-tax-services with the UK side at us-uktax.com/uk-tax-services.

If the Form 5471 was never filed at all, currency is the second problem rather than the first. Unfiled information returns for a UK company are usually brought current through the Streamlined Filing Compliance Procedures where the taxpayer qualifies as non-wilful, and we deal with that route at us-uktax.com/irs-streamlined-filing and us-uktax.com/streamlined-foreign-offshore-procedures. The currency file described above still has to be built, because a streamlined submission that cannot explain its own dollar figures is a submission that invites the examination it was meant to avoid.