£12
Online Companies House registration fee — the lowest formation cost in this entire 30-country series; no notarization, no minimum capital, often completed same day
25%
Main Corporation Tax rate (profits over £250,000 from April 2023); Small Profits Rate of 19% for profits under £50,000; Marginal Relief applies between the two thresholds
2020
Year the UK left the EU single market — a UK Ltd is now a third-country entity relative to the EU; no automatic EU passporting; TCA governs UK-EU trade with customs and regulatory divergence
Post-Brexit UK — What Changed and What It Means for Your Business
Brexit fundamentally changed the strategic calculus for UK company registration. Before December 2020, a UK Ltd provided all the benefits of an EU-registered company plus the English common law legal system, London's financial infrastructure, and the English language. Since 31 December 2020, the UK is a third country relative to the EU — a UK company exporting goods to the EU faces customs declarations, rules of origin requirements, and regulatory checks that did not exist before. UK service providers can no longer automatically passport financial services, professional qualifications, or digital services across EU member states under MiFID II, the Payment Services Directive, or other EU regulatory frameworks.
The UK-EU Trade and Cooperation Agreement (TCA) provides tariff-free trade for goods that meet rules of origin requirements — but it covers goods far more comprehensively than services. For most professional services, technology companies, and financial services businesses whose customers are primarily in the EU, the post-Brexit regulatory environment creates friction that did not previously exist. This friction is real, growing (as UK and EU regulations diverge further over time), and must be factored into the registration decision. For American businesses whose primary market is the UK domestic market, or who want a global English-language corporate base outside the US, the UK remains an excellent choice. For those who primarily need EU access, register in the EU.
Business StructuresLtd, LLP, or PLC — Choosing the Right UK Entity
The Private Limited Company (Ltd) is the overwhelming choice for foreign entrepreneurs and American business owners. The LLP (Limited Liability Partnership) is used for professional firms. The PLC (Public Limited Company) is for larger businesses seeking a UK stock exchange listing.
Most Common★ Recommended for Americans
Private Limited Company
Ltd — Private Limited Company
The standard UK corporate structure. Liability of shareholders limited to their share capital. No minimum share capital — a single £1 share is legally sufficient. No notarization required. Registered online with Companies House for £12 in under 24 hours. The Memorandum of Association and Articles of Association are the founding documents — Companies House provides model Articles (Table A for companies prior to 2006 Act; model Articles under the Companies Act 2006 for new companies). All public company information is accessible through Companies House. Registered office address must be in the same nation of the UK as the company is registered (England & Wales, Scotland, or Northern Ireland).
Professional Firms
Limited Liability Partnership
LLP — Limited Liability Partnership
For professional firms (law, accountancy, architecture, consultancy) where partnership structure is preferred but limited liability is required. At least two designated members are required — both must be registered with Companies House. LLPs are tax-transparent in the UK — profits are taxed at the partner level, not the entity level. The LLP's annual accounts and confirmation statement are filed with Companies House in the same manner as a Ltd. Not a corporation — unsuitable as a standard foreign-owned trading company structure.
Public Markets
Public Limited Company
PLC — Public Limited Company
For larger businesses seeking a listing on the London Stock Exchange (LSE Main Market), AIM (Alternative Investment Market), or other UK-regulated markets. Requires minimum share capital of £50,000 (25% paid up — minimum £12,500). More complex governance: minimum two directors, a qualified Company Secretary, and mandatory statutory audit regardless of size. Must include "PLC" in its name. Not appropriate for most initial foreign company formations — the Ltd is correct for the vast majority of American founders.
Sole Traders
Sole Trader / Self-Employed
Sole Trader registration (HMRC)
For individuals operating as sole traders. Registration is directly with HMRC for Self Assessment — there is no Companies House registration. The sole trader bears unlimited personal liability for all business debts. UK residency is generally required for practical sole trader operations. Non-resident Americans wanting to trade in the UK should use a Ltd — it provides limited liability without residency requirements for shareholders or directors.
UK Corporation Tax — Three-Tier Structure Since April 2023
The UK Corporation Tax (CT) rate was unified at 19% until April 2023, when a three-tier structure was introduced. The main rate increased to 25% for companies with profits above £250,000. A Small Profits Rate of 19% was retained for companies with profits of £50,000 or below. Companies with profits between £50,000 and £250,000 apply Marginal Relief — a tapering mechanism that produces an effective rate between 19% and 25%.
19%
Small Profits Rate
Profits of £50,000 or below — the full Small Profits Rate applies. Below the GILTI exclusion threshold of 18.9%... but wait: 19% is marginally above it. Confirm annually with a US tax advisor.
19–25%
Marginal Relief
Profits between £50,001 and £250,000 — Marginal Relief provides a tapered effective rate. The formula: CT = profits × 25% − (upper limit − profits) × 3/200. Apply for Marginal Relief through the HMRC CT600 return.
25%
Main Rate
Profits above £250,000 — the 25% main rate applies. Clearly above the GILTI high-tax exclusion threshold. The UK-US treaty provides additional relief on qualifying dividend distributions.
UK Tax — Corporation Tax, VAT, and the UK-US Treaty
United Kingdom Tax Framework
25%
Main Corporation Tax rate (profits over £250,000); Small Profits Rate 19% (profits under £50,000); Marginal Relief applies in between — the most nuanced CT structure in this series
20%
Standard UK VAT rate; reduced rate 5% (domestic fuel, children's car seats, some energy-saving materials); zero-rated: food, children's clothing, books, medicines; £90,000 registration threshold (raised from £85,000 in April 2024)
£85k
VAT registration threshold — the highest in this 30-country series; UK companies below £90,000 in taxable turnover (raised from £85,000 in April 2024) are not required to register for VAT, significantly reducing compliance burden for smaller businesses
The UK uses pound sterling (GBP — £) and is not in the EU or the Eurozone. The GBP floats freely against the euro and the dollar — post-Brexit GBP/EUR and GBP/USD volatility has been meaningful, and FX risk must be factored into business models with cross-currency revenues and costs. The UK has one of the world's most comprehensive double taxation treaties with the United States. The US-UK treaty covers Corporation Tax, withholding on dividends (typically 5% for companies with 10%+ stakes; 15% otherwise under the treaty), interest, royalties, and capital gains. The treaty includes detailed Limitation on Benefits (LOB) provisions and is widely considered the gold standard for bilateral US tax treaties. At the 25% main CT rate, UK profits clearly qualify for the GILTI high-tax exclusion. At the 19% Small Profits Rate, UK profits are marginally above the 18.9% GILTI threshold — confirm annually. HMRC (His Majesty's Revenue and Customs — hmrc.gov.uk) administers UK tax. Companies House (companieshouse.gov.uk) administers the company register. The UK has no mandatory B2B e-invoicing system equivalent to Italy's SDI — digital record-keeping is required under Making Tax Digital (MTD), but this is a digital accounting/filing requirement rather than invoice-level government reporting. UK financial statements filed at Companies House are publicly accessible.
⚠️ US Tax Obligations Apply to UK Company Owners — GILTI Position Depends on Which CT Rate Applies
US citizens and Green Card holders are taxed by the United States on worldwide income regardless of where their company is registered. Owning a UK Ltd creates US filing obligations including FBAR reporting for UK bank accounts over $10,000 and Controlled Foreign Corporation (CFC) reporting (Form 5471). At the 25% main CT rate (profits over £250,000), UK profits clearly qualify for the GILTI high-tax exclusion. At the 19% Small Profits Rate (profits under £50,000), the position is marginally above the 18.9% GILTI threshold — confirm annually. In the Marginal Relief band (£50,001–£250,000), the effective CT rate tapers between 19% and 25% — companies whose effective rate falls near 18.9% need the most careful GILTI monitoring. The US-UK treaty's LOB provisions must be satisfied for treaty benefits to apply. Engage a US-UK cross-border tax advisor to structure your ownership and confirm GILTI exclusion eligibility at your expected profit level.
How to Register a Company in the UK
UK company registration is the simplest in this entire series. There is no notarization, no minimum capital requirement, no mandatory in-person presence, and the process can be completed entirely online. The Companies House online portal processes standard Ltd applications within 24 hours — often same day. This simplicity is genuine and is one of the UK's most significant business environment advantages.
1
Choose Your Entity and Assess US Tax Position
For most American founders, the Private Limited Company (Ltd) is the correct choice — it provides limited liability, no minimum capital requirement, and no notarization. Before registering, engage a US cross-border tax advisor to confirm the GILTI position at your expected UK profit level: 25% main rate (profits over £250,000) clearly qualifies for GILTI exclusion; 19% Small Profits Rate (profits under £50,000) is marginally above the 18.9% threshold; the Marginal Relief band requires calculation of your effective CT rate. Also confirm your UK CT registration obligations — HMRC requires registration for Corporation Tax within 3 months of commencing business.
Decision + US tax assessment
2
Check Your Company Name on Companies House
Check name availability on the Companies House WebFiling portal (find-and-update.company-information.service.gov.uk) or through the GOV.UK company name checker. The name must be unique within the Companies House register, must end in "Limited" or "Ltd" for a private limited company, must not contain sensitive words without permission (e.g., "Royal", "Bank", "University"), and must not be the same as or too similar to an existing registered name. Sole use of a company name at Companies House does not automatically confer trademark protection — register a UK trademark separately with the Intellectual Property Office (IPO) if brand protection is required.
Companies House name check — free
3
Prepare Memorandum and Articles of Association
Prepare the Memorandum of Association (a brief statement signed by all initial shareholders confirming their intention to form a company) and the Articles of Association (the constitutional rules for how the company is run). For most standard Ltd formations, Companies House's model Articles under the Companies Act 2006 (CA2006) are sufficient — these are pre-approved articles that cover standard governance and can be adopted without modification. Custom Articles are available if specific governance arrangements are required. No notarization is required — this is a statutory document filed directly with Companies House.
Model CA2006 Articles — no notarization
4
Register Online with Companies House for £12
Submit the registration application through the Companies House online portal (companieshouse.gov.uk) or through a recognised formation agent. The application (IN01 form equivalent online) requires: proposed company name, registered office address in England & Wales / Scotland / Northern Ireland, director details (name, date of birth, service address, residential address — residential address is kept private in the public register), shareholder details and Statement of Capital, SIC code (Standard Industrial Classification — business activity code), and confirmation of the Memorandum and Articles of Association. The £12 fee is payable by debit or credit card. Processing is typically same-day or next working day. Paper registration (Form IN01 by post) costs £40 and takes significantly longer.
£12 online / same-day processing
5
Receive Your Company Registration Number (CRN)
Upon approval, Companies House issues a Certificate of Incorporation and a Company Registration Number (CRN) — an 8-digit number (e.g., 12345678) that uniquely identifies your company in the UK. The CRN must appear on all company stationery, invoices, emails, and official communications. The company's details — directors, shareholders, registered office, accounts — are immediately publicly accessible through the Companies House register at find-and-update.company-information.service.gov.uk. Unlike most EU jurisdictions, UK company formation documents and filings are fully public without charge.
CRN issued — immediate public record
6
Register for Corporation Tax with HMRC
Register the company for Corporation Tax (CT) with HM Revenue and Customs (HMRC — hmrc.gov.uk) within 3 months of commencing business activity. HMRC registration is separate from Companies House registration — Companies House notifies HMRC of new company registrations, but the company must separately activate its CT account and provide accounting period details. Register through the HMRC Business Tax Account portal using the company's Government Gateway credentials. The company's Unique Taxpayer Reference (UTR) — a 10-digit number — is issued by HMRC and must be used for all CT filings. CT returns (CT600) are due 12 months after the end of the accounting period; CT payment is due 9 months and 1 day after the accounting period end for standard companies.
Register within 3 months of commencing
7
Register for VAT with HMRC if Required
Register the company for VAT with HMRC if your expected taxable UK turnover will exceed £90,000 (raised from £85,000 in April 2024) in a rolling 12-month period. The UK's £90,000 VAT threshold is the highest in this 30-country series — significantly higher than Germany (€22,000), France (various thresholds), and most EU member states. Voluntary VAT registration is possible below the threshold and can be advantageous for businesses incurring significant input VAT or dealing primarily with other VAT-registered businesses. The standard UK VAT rate is 20%, with a 5% reduced rate for domestic energy, children's car seats, and some energy-saving products. Food, children's clothing, books, newspapers, and prescription medicines are zero-rated. Businesses can deregister if turnover falls below £88,000.
£90,000 threshold — highest in series
8
Open a UK Business Bank Account
Open a UK business bank account using the CRN and Certificate of Incorporation. Major UK banks include Barclays, HSBC, Lloyds, NatWest, and Santander UK — all offer standard business current accounts, though AML due diligence for non-resident overseas directors and shareholders applies and can be thorough. A faster alternative for non-resident founders is a UK-authorised e-money institution or neobank: Wise Business (GBP/EUR/USD accounts with UK sort code and account number), Revolut Business, Starling Bank, or Tide all provide quick-to-open UK business accounts that accept Companies House CRNs and satisfy most UK payment processing and HMRC requirements without the AML complexity of traditional high-street banking.
Neobank option fastest for non-residents
What Does It Cost to Register a Company in the UK?
The UK is by far the cheapest formation in this 30-country series. The £12 Companies House fee, zero minimum capital, and no notarization requirement make the UK outlier-level accessible. Ongoing compliance costs — annual confirmation statement (£34 online), annual accounts, and CT return — are also among the most affordable in Europe.
| Cost Item | Notes | Est. Amount |
|---|---|---|
| Companies House registration fee | Online Ltd registration — the lowest government company formation fee in this series by a very wide margin. Paper/postal registration costs £40. | £12 (online) |
| Minimum share capital | None required — a single £1 share is sufficient. No capital deposit, no bank confirmation letter needed at registration. | £1 (or more by choice) |
| Registered office address | Every UK Ltd requires a registered address in the same UK nation as its registration. Virtual office services in London widely available; many formation agents include a registered address service. | £50–£300/yr |
| Annual Confirmation Statement | Filed annually with Companies House to confirm company details. Online filing fee. | £34/yr (online) |
| Accountancy & CT return | Annual accounts and CT600 Corporation Tax return filed with HMRC and Companies House. UK professional rates vary widely; online accountancy services (Crunch, FreeAgent, Tide) provide cost-effective options for smaller companies. | £500–£3,000/yr |
| Formation agent / legal fees | Many formation agents provide same-day Ltd registration including registered address for £20–£50 all-in. Legal advice needed only for bespoke Articles or complex ownership structures. | £0–£500 |
Post-Registration Requirements
Annual Confirmation Statement (Companies House)
Every UK Ltd must file an annual Confirmation Statement (CS01 — formerly the Annual Return) with Companies House confirming that the company's registered information is up to date: registered office, directors, shareholders, PSC (Persons with Significant Control), and SIC codes. The filing deadline is within 14 days of the review period anniversary. The online filing fee is £34. Failure to file results in the company being struck off the Companies House register — a serious consequence that can be administratively undone but requires restoration proceedings. This is the most commonly missed compliance obligation for companies with non-resident overseas owners.
Annual Accounts and CT600 Corporation Tax Return
UK Ltd companies must prepare annual accounts in accordance with UK GAAP (FRS 102 or FRS 105 for micro-entities) and file them with Companies House (abridged accounts for small companies) and HMRC (full accounts with the CT600 return). Statutory audit is mandatory only for companies exceeding two of three size thresholds (turnover over £10.2M, balance sheet over £5.1M, more than 50 employees) — the vast majority of foreign-owned Ltds are exempt. The CT600 return is due 12 months after the accounting period end; CT payment is due 9 months and 1 day after the period end for standard companies. Large companies (CT liability over £1.5M) pay CT in quarterly instalments.
PSC Register (Persons with Significant Control)
Every UK Ltd must maintain a PSC Register (Persons with Significant Control) identifying individuals who own or control more than 25% of shares or voting rights, have the right to appoint or remove the majority of directors, or otherwise exercise significant influence or control. PSC information must be filed with Companies House and is publicly accessible. For American founders who are the sole or majority shareholder of a UK Ltd, they are almost certainly a PSC and must be registered as such. Changes to PSC status must be notified to Companies House within 14 days. The PSC register was expanded in 2023 — confirm current requirements with a UK company law advisor.
Making Tax Digital (MTD) for VAT
VAT-registered UK companies must comply with Making Tax Digital for VAT (MTD for VAT) — maintaining digital records and submitting VAT returns using HMRC-compatible software (Xero, QuickBooks, Sage, FreeAgent, etc.). MTD for VAT applies to all VAT-registered businesses. MTD for Corporation Tax (MTD for CT) is planned but has been delayed — confirm the current implementation timeline with HMRC or a UK accountant. Unlike Italy's SDI or Poland's JPK-FA, the UK does not require invoice-level data submission to HMRC — MTD is a digital filing and record-keeping requirement, not a real-time invoice reporting mandate.
What Americans Should Know Before Registering in the UK
The £12 registration is genuinely that simple — but post-Brexit EU access is not
UK company formation is the easiest in this 30-country series without meaningful qualification — online, same-day, £12, no notary, no capital, no residency requirement. For American founders whose UK Ltd will serve the UK domestic market, sell to US customers, or operate in global markets where UK corporate registration is neutral, this simplicity is a genuine advantage with no hidden cost. The complexity enters when the business needs EU customers, EU regulatory approval, EU data processing compliance under GDPR (UK has UK-GDPR now diverging from EU GDPR), or EU-regulated financial services. A UK-registered fintech cannot passport into the EU under MiFID II or PSD2 post-Brexit — it needs an EU entity for EU customers. A UK company processing EU personal data under UK-GDPR must comply with separate but increasingly divergent UK data protection rules from EU GDPR, and EU data transfers to the UK require an EU adequacy decision (currently granted but subject to review). The easy part is registration. The complex part is the post-Brexit regulatory map.
The Annual Confirmation Statement is the most commonly missed compliance obligation — set a calendar reminder
Companies House automatically strikes off companies that fail to file their Annual Confirmation Statement within the required deadline. For non-resident overseas founders who have registered a UK Ltd remotely and are not actively monitoring UK statutory deadlines, this is a real and frequently occurring problem. The process is not complex — a £34 online filing once a year — but the consequence of missing it is severe: the company is dissolved and its name becomes available for others to register. Restoration is possible but requires a formal application and can take weeks. Appoint a UK formation agent or accountant who provides statutory compliance reminders as part of their service package. This is not optional — it is the most fundamental ongoing obligation of a UK Ltd.
The GILTI position is uniquely complex at the 19% Small Profits Rate — the UK is the only country in this series with a rate this close to the threshold at a distinct tier
The UK's three-tier Corporation Tax structure creates an unusual GILTI situation. At the 25% main rate (profits over £250,000), the GILTI high-tax exclusion clearly applies. At the 19% Small Profits Rate (profits under £50,000), UK CT is only 0.1 percentage point above the GILTI exclusion threshold of 18.9% — the same thin margin as Sweden (20.6%) and the Netherlands (19%), but at a lower profit level. In the Marginal Relief band (£50,001–£250,000), the effective CT rate is a calculated intermediate rate that may or may not clear 18.9% depending on the company's exact profit figure. For American owners of UK Ltds whose profits are expected to fall in the lower two tiers, monitoring the effective CT rate annually and confirming GILTI exclusion eligibility with a US tax advisor is essential — the UK is the only jurisdiction in this series with this three-band complication.
UK neobanks and e-money institutions are the fastest path to a working business account for non-resident founders
Traditional UK high-street banks (Barclays, HSBC, Lloyds, NatWest) apply thorough AML and KYC due diligence for companies with non-resident overseas directors and shareholders — account opening can take 4 to 8 weeks and sometimes results in rejection for non-UK-resident applicants without a prior banking relationship. UK-authorised neobanks and e-money institutions offer a dramatically faster path: Wise Business provides a UK business account with a real sort code and account number, GBP/EUR/USD currency balances, and same-day or next-day onboarding for most Ltd applicants. Revolut Business, Starling Bank, and Tide offer similar speed. These accounts are accepted by most UK B2B payment systems, HMRC for tax payments, and international wire transfers. For early-stage non-resident-owned Ltds, a Wise Business account opened immediately after receiving the CRN is the practical first step — a traditional bank account can be added later when banking relationships are established.
GBP is not euro — post-Brexit sterling volatility adds FX risk that did not exist before 2016
The pound sterling (GBP) has experienced significant volatility since the 2016 Brexit referendum — depreciating materially against both the euro and the dollar in the immediate aftermath of the vote, recovering partially, and experiencing further sharp moves during political crises (the September 2022 mini-budget episode saw GBP/USD fall to historical lows). For American companies operating in both the UK and EU markets — with GBP revenues from UK customers and EUR costs or EU-based expenses — the GBP/EUR FX risk is a real operating cost consideration that did not apply when the UK was in the EU. A UK Ltd with significant EUR revenues or EUR-denominated supplier costs should model GBP/EUR scenarios carefully and consider whether a multi-currency business account (Wise, Revolut) that holds both GBP and EUR balances reduces the practical FX friction.
Registering a UK Company Is Right for You If…
- →Your primary market is the UK domestic market, US customers served from a UK base, or global markets where a UK Ltd is operationally neutral — and EU single market access is not your primary objective.
- →You want the simplest, fastest, cheapest company formation in Europe — £12, same-day, no notarization, no minimum capital, no residency requirement; nothing else in this series comes close.
- →You have confirmed the GILTI position with a US cross-border tax advisor for your expected UK profit level — 25% main rate clearly qualifies; 19% Small Profits Rate requires annual confirmation; Marginal Relief band requires effective rate calculation.
- →You have set up annual Confirmation Statement reminders (Companies House, £34 online) and engaged a UK accountant for the CT600 and annual accounts — the two core ongoing compliance obligations that non-resident owners most frequently overlook.
- →You understand that post-Brexit UK regulatory divergence — GDPR vs UK-GDPR, MiFID II passporting loss, TCA rules of origin — creates growing friction for UK companies serving EU customers, and you have assessed whether this affects your specific business model.
We work with trusted UK formation agents, accountants, and corporate solicitors who specialise in company formation for non-UK nationals. From Companies House Ltd registration and HMRC CT and VAT enrollment through PSC register management, Annual Confirmation Statement compliance, Making Tax Digital setup, UK business bank account introduction, and US cross-border tax coordination for CT tier GILTI planning — we guide you through every step of the UK's uniquely simple but post-Brexit-nuanced formation process. Before engaging any firm, it's worth cross-checking their standing on LocalVouch, an independent directory of verified client reviews for cross-border service providers.