Introduction Self-employment creates one of the most complex filing positions a US person in the UK can face. A salaried American pays UK income tax through PAYE. Their US filing obligation is significant — but at least the income picture is straightforward. A self-employed American in the UK faces something far more intricate. They owe […]
Self-employment creates one of the most complex filing positions a US person in the UK can face.
A salaried American pays UK income tax through PAYE. Their US filing obligation is significant — but at least the income picture is straightforward. A self-employed American in the UK faces something far more intricate.
They owe UK income tax and National Insurance on their profits. They also owe US self-employment tax on the same profits — unless the US-UK Totalisation Agreement applies. They can claim the Foreign Earned Income Exclusion on their net self-employment income. And they must file Schedule C, Schedule SE, and potentially Form 2555 or Form 1116 — all simultaneously, on a single US federal return.
Specialist US expat tax services for self-employed Americans manage this entire picture. Getting any part of it wrong produces either overpayment or underpayment — and sometimes both at once. This guide clearly explains the full picture.
Contact Jungle Tax at https://www.jungletax.co.uk/ to discuss your self-employment position.
US expat tax services for self-employed Americans are specialist compliance and advisory services that cover the full US and UK tax filing obligations for US citizens and permanent residents who operate as freelancers, consultants, sole traders, or directors of their own companies — while living in the United Kingdom.
These services differ from standard expat tax services for employees because the self-employment tax dimension — Schedule SE — adds a layer that employment income does not. The US self-employment tax rate is 15.3 percent on net self-employment income up to the Social Security wage base, and 2.9 percent on the portion above it. For a high-earning consultant in London, this creates a significant additional US liability that the Foreign Earned Income Exclusion alone cannot eliminate.
The number of Americans working independently in the UK has grown steadily since remote working became normalized after 2020. Many operate as UK limited company directors, others as sole traders, and others on US employment contracts while physically located in the UK.
Each structure creates a different tax profile. A sole trader faces UK Class 2 and Class 4 NICs, as well as US self-employment tax. A limited company director may avoid NICs on certain dividend income — but faces different US reporting obligations on the company. A US-contracted remote worker may face both UK and US social security obligations unless the Totalisation Agreement applies.
This guide covers US citizens and permanent residents living in the UK who earn income from self-employment — whether as freelancers, consultants, sole traders, or owner-directors. The IRS guidance on self-employment tax for US persons abroad is published at:
https://www.irs.gov/individuals/international-taxpayers/self-employment-tax-for-us-citizens-abroad
The US-UK Totalisation Agreement prevents double social security contributions — paying both UK NICs and US self-employment tax on the same income. However, the agreement does not apply automatically. The self-employed person must obtain a certificate of coverage from either HMRC or the US Social Security Administration to confirm which country’s system applies.
In most cases, a self-employed American living and working in the UK pays and Cs—and the Totalisation Agreement exempts them from US self-employment tax. But without the certificate of coverage, the IRS expects Schedule SE to be filed and self-employment tax to be paid. Many self-employed Americans pay both — because no one told them the exemption existed.
The Foreign Earned Income Exclusion covers net self-employment income — not gross. The exclusion applies after deducting all business expenses on Schedule C. This is an important distinction. An American freelancer who earns £80,000 and spends £20,000 on allowable business expenses has a net self-employment income of £60,000. The FEIE exclusion applies to that net figure — not the gross.
Additionally, even where the FEIE eliminates the US income tax on self-employment income, it does not eliminate the US self-employment tax. Self-employment tax applies regardless of the FEIE — unless the Totalisation Agreement certificate of coverage exempts it.
Our related guide on US expat tax services for the FEIE and Foreign Tax Credit covers the FEIE mechanics in full for employed Americans.
A self-employed American who operates through a UK limited company — as many do for UK tax efficiency reasons — may trigger US controlled foreign corporation reporting obligations. A US person who owns more than 50 percent of a foreign corporation must file Form 5471 annually. Missing Form 5471 leaves the statute of limitations open indefinitely on the entire US return.
Every self-employed American files Schedule C with their US federal return. Schedule C reports gross income and all allowable business deductions. The net profit — gross income minus business expenses — flows to Schedule SE for self-employment tax calculation, and to Form 1040 as ordinary income.
Business expenses deductible on Schedule C include professional fees, travel, home office costs, equipment, software, and any other ordinary and necessary business costs. The UK and US treat business expenses similarly — but not identically. A specialist US expat tax services adviser reconciles the Schedule C deductions with the UK self-assessment business income figures to ensure consistency.
Schedule SE calculates the US self-employment tax. The rate is 15.3 percent on net self-employment income up to the Social Security wage base — $168,600 in 2024 — and 2.9 percent on amounts above it. The taxpayer deducts half of the self-employment tax on the federal return as an above-the-line deduction.
Where the Totalisation Agreement applies, Schedule SE is not filed, and no self-employment tax is owed. The certificate of coverage from HMRC confirms the exemption. Without it, the IRS expects the full self-employment tax to be paid. The adviser obtains the certificate of coverage as part of the standard engagement for any self-employed client covered by the agreement.
A self-employed person in the UK pays Class 2 National Insurance at a flat weekly rate — £3.45 per week in 2024-25 — and Class 4 National Insurance at 6 percent on profits between £12,570 and £50,270, and 2 percent above £50,270.
Where the Totalisation Agreement applies, and the self-employed person pays UK NICs, those NICs cannot be credited against the US self-employment tax — because the Totalisation Agreement exempts the US self-employment tax entirely. The two systems operate separately within the agreement framework. A specialist adviser explains this clearly so clients do not double-count the relief.
Where the self-employed American uses the Foreign Tax Credit rather than the FEIE, the UK income tax paid on self-employment profits generates a foreign tax credit on the US return. The credit falls in the general income basket on Form 1116. This credit offsets the US federal income tax on the same profits — but not the self-employment tax, which the Totalisation Agreement addresses separately.
The adviser begins by classifying all income sources — self-employment, investment, and rental income — to determine the correct treatment for each. For the self-employment income, the adviser models the FEIE versus Foreign Tax Credit decision. The FEIE typically suits lower earners below the $126,500 exclusion threshold. The FTC suits higher earners, or those for whom the UK income tax rate exceeds the US marginal rate on the same income. The adviser calculates the net liability under each option before recommending one.
Simultaneously, the adviser confirms whether the Totalisation Agreement applies. If a self-employed American lives and works in the UK, UK NICs apply. The adviser applies to HMRC for a certificate of coverage — Form CA3837 — confirming that the Totalisation Agreement exempts the client from US self-employment tax. This certificate attaches to the US federal return where Schedule SE would otherwise appear.
The adviser prepares Schedule C using the client’s UK self-assessment income and expense figures as the starting point. Allowable US business deductions are confirmed against the Schedule C rules. Any items deductible in the UK but not in the US — or vice versa — are identified and adjusted. The net profit figure on Schedule C matches the net profit on the UK self-assessment.
Where the client operates through a UK limited company, the adviser assesses the Form 5471 obligation. A US person who owns 50 percent or more of a UK company must file Form 5471 annually. The company’s income, assets, and distributions are reported. Subpart F income inclusions and GILTI charges are assessed. The IRS guidance on Form 5471 is published at:
https://www.irs.gov/instructions/i5471
The US federal return includes Form 1040, Schedule C, Schedule SE where applicable, Form 2555 or Form 1116, the FBAR for all UK business and personal accounts, and Form 8938 where the FATCA threshold is met. The UK self-assessment covers the same profits under the UK trading income rules. Both returns go out in the same filing window with consistent income figures throughout. The adviser manages both simultaneously — not sequentially — ensuring no inconsistencies arise between the two jurisdictions.
The HMRC guidance on self-employment income for UK tax purposes is published at:
https://www.gov.uk/self-employed-national-insurance-rates
Jake is a US citizen. He has been a UK resident for five years. He works as an independent management consultant, billing clients in both the UK and the United States. His annual net self-employment income is approximately £95,000 — around $121,000 at current exchange rates. He pays UK income tax at 40 percent on income above the personal allowance and Class 4 NICs at 6 percent on profits between £12,570 and £50,270.
Jake had been filing his own US federal return. He filed Schedule C correctly and also filed Schedule S, paying US self-employment tax of approximately $17,100 on his net income. He did not know the Totalisation Agreement applied to him. He had been paying both UK Class 4 NICs and US self-employment tax every year for five years.
He also used the FEIE, excluding the full $121,000 of net self-employment income from US income tax. However, because he elected the FEIE, he could not claim the Foreign Tax Credit. His UK income tax of approximately £31,000 generated no credit on the US return. The FEIE election cost him the foreign tax credit at an income level where the FTC would have yielded a better result.
Jungle Tax obtained a certificate of coverage from HMRC confirming the Totalisation Agreement exemption for the prior three years. Amended US federal returns removed the Schedule SE entries. The US self-employment tax refund for the three years came to approximately $51,300.
Jungle Tax also modeled the FEIE versus FTC decision. At £95,000 of net profit, the Foreign Tax Credit produced zero US income tax — because UK income tax of 40 percent exceeded the US marginal rate on the same income. The FEIE election was revoked. From the following year, Jake used the FTC. His ongoing US federal tax liability has been reduced to zero for both income tax and self-employment tax.
Contact our US expat tax services team at hello@jungletax.co.uk or 0333-8807974 if you are self-employed in the UK and have been paying US self-employment tax.
This is the most expensive mistake a self-employed American in the UK makes. Without the certificate of coverage, the IRS expects Schedule SE and the full self-employment tax to be reported. The Totalisation Agreement exemption is not automatic — the adviser must apply for it. Every self-employed American living and working in the UK should have a certificate of coverage on file.
The FEIE covers net self-employment income up to $126,500. For earners above that threshold — or for those where UK income tax exceeds the US rate — the FTC produces a better outcome. The FEIE election also blocks the FTC on excluded income. Advisers who default to the FEIE without modeling the FTC cost their clients money every year.
A self-employed American who operates through a UK limited company must file Form 5471 annually if they own 50 percent or more of the company. Missing Form 5471 leaves the statute of limitations open indefinitely. The penalty for a late or missing Form 5471 is $10,000 per year. The adviser confirms the Form 5471 obligation as a first step in any limited company engagement. The full IRS Streamlined Filing Compliance Procedures are published at:
https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures
UK and US rules on allowable business deductions differ. Some items deductible on the UK self-assessment — certain entertainment costs, for example — are not deductible on Schedule C. An adviser who transfers UK expense figures directly to Schedule C without applying US rules produces an incorrect return. The Schedule C figures must reflect the US rules — not the UK ones.
A self-employed American who holds a UK business bank account must include it on the FBAR if the aggregate balance of all foreign accounts exceeded $10,000 at any point during the year. Many self-employed Americans include their personal UK accounts on the FBAR but omit the business account. Both are foreign financial accounts for FBAR purposes.
The net profit on Schedule C and the net profit on the UK self-assessment should be consistent, adjusted only for the difference in allowable deductions between the two systems. An adviser who does not reconcile the two figures produces returns that are inconsistent across jurisdictions. HMRC and the IRS both receive information about the taxpayer. Inconsistencies invite scrutiny.
Jungle Tax is a specialist US-UK cross-border tax advisory firm whose team includes IRS Enrolled Agents and UK-qualified tax practitioners with specific experience in the tax compliance requirements of self-employed Americans in the UK. We prepare Schedule C using the correct US rules, obtain the Totalisation Agreement certificate of coverage from HMRC where it applies, model the FEIE versus Foreign Tax Credit decision for each client, assess the Form 5471 obligation for any UK limited company, file the FBAR and Form 8938 for all qualifying accounts, and prepare both the UK self-assessment and the US federal return simultaneously with consistent figures throughout. You can find further information on our page at https://www.jungletax.co.uk/, or read our guide to US expat tax services — FEIE and Foreign Tax Credits for Americans in the UK. If you are self-employed in the UK and have not had the Totalisation Agreement assessed or the FEIE versus FTC decision modeled, contact our team at hello@jungletax.co.uk or call 0333-8807974 today.
Self-employment in the UK creates a uniquely complex US filing position for Americans abroad. Specialist US expat tax services for self-employed Americans resolve the Schedule C preparation, the Totalisation Agreement exemption, the FEIE versus FTC decision, and any Form 5471 obligation — all as part of a single integrated engagement.
Three points matter most. First, the Totalisation Agreement exempts most UK-resident self-employed Americans from US self-employment tax — but only if the certificate of coverage is obtained. Without it, the IRS charges the full 15.3 percent. Second, the FEIE applies to net self-employment income — not gross — and does not eliminate the self-employment tax. Third, operating through a UK limited company triggers a Form 5471 filing obligation and carries a $ 10,000 penalty per year.
Speak to a Jungle Tax adviser today — contact us at hello@jungletax.co.uk or visit https://www.jungletax.co.uk/ to learn more.
Not necessarily. The US-UK Totalisation Agreement prevents double social security contributions. A self-employed American who lives and works in the UK typically pays UK Class 2 and Class 4 National Insurance, and the Totalisation Agreement exempts them from US self-employment tax. However, the exemption is not automatic. The adviser must apply to HMRC for a certificate of coverage on Form CA3837. Without this certificate, the IRS expects Schedule SE and the full 15.3 percent self-employment tax to be withheld on net self-employment income.
Yes. The FEIE covers net self-employment income — after all Schedule C deductions — up to $126,500 in 2024. However, the FEIE does not eliminate the US self-employment tax. Self-employment tax applies separately — unless the Totalisation Agreement certificate of coverage exempts it. Additionally, the FEIE election blocks the Foreign Tax Credit on the excluded income. For higher earners, or for those in which UK income tax exceeds the US rate on the same income, the Foreign Tax Credit typically yields a better combined outcome than the FEIE.
Schedule C is the US tax form for reporting self-employment income and business expenses. Every self-employed American — wherever they live — must file Schedule C with their US federal return if they earn self-employment income. The net profit on Schedule C flows to Schedule SE for self-employment tax calculation and to Form 1040 as ordinary income. Business expenses deductible on Schedule C include professional fees, equipment, software, home office costs, and travel. The US rules on allowable deductions differ in some respects from the UK self-assessment rules — a specialist adviser reconciles the two.
Yes, in most cases. A US person who owns 50 percent or more of a foreign corporation — including a UK limited company — must file Form 5471 annually. The form reports the company’s income, assets, and distributions. Missing Form 5471 leaves the statute of limitations open indefinitely on the entire US return. The IRS imposes a penalty of $10,000 per year for a late or missing Form 5471. A specialist adviser assesses the Form 5471 obligation at the outset of any limited company engagement and files the form as part of the annual compliance program.
Where the Totalisation Agreement applies, UK NICs and US self-employment tax do not overlap — the agreement assigns each self-employed person to one social security system. A UK-resident self-employed American pays UK Class 2 and Class 4 NICs and pays no US self-employment tax. The UK NICs cannot be credited against any US liability — they simply replace the US self-employment tax obligation entirely within the agreement framework. Where the Totalisation Agreement does not apply — for example, because the certificate of coverage was not obtained — both UK NICs and US self-employment tax are owed simultaneously.
The right choice depends on your income level and the UK income tax rate you pay. For self-employment income below $126,500, the FEIE removes the income from US income tax entirely — though it does not eliminate the self-employment tax. For income above that threshold, or where UK income tax at 40 or 45 percent exceeds the US rate on the same income, the Foreign Tax Credit typically produces a lower combined liability. The FEIE election also blocks the FTC on excluded income, so the decision has long-term consequences. A specialist adviser models both options before any election is made.
