What is Corporate Income Tax (Guernsey)?
Guernsey operates a 0% corporate income tax rate for the vast majority of companies. Standard trading companies pay zero corporation tax on profits. Only specific regulated sectors face a 10% rate: banking businesses, domestic insurance licensees, insurance managers/intermediaries, fiduciaries, and fund administrators. The 0% rate is one of Guernsey's primary commercial attractions and applies regardless of the company's level of profit.
Current Rate (Calendar year (1 January to 31 December) or company's accounting period)
0% standard; 10% for regulated financial services businesses
Example
A Guernsey-registered tech company generating £500,000 net profit pays £0 in corporate income tax under the standard 0% rate. A Guernsey-licensed bank generating the same profit pays £50,000 (10%).
How Corporate Income Tax (Guernsey) works in Guernsey
Guernsey's zero rate of corporate income tax has been in place since the Zero-10 tax regime was introduced in 2008. It applies to the overwhelming majority of companies incorporated and operating in Guernsey.
**The 0% rate applies to:** - Trading companies of all types - Holding companies - Property investment companies (with some nuances on Guernsey land) - Companies carrying on business outside Guernsey - International business entities - Exempt companies (subject to annual fee)
**The 10% rate applies to:** - Banking businesses licensed under the Banking Supervision (Bailiwick of Guernsey) Law - Domestic insurance licensees (Class 1, 2, 3 insurers writing domestic risks) - Insurance managers, brokers and intermediaries - Fiduciary licensees (trust companies, corporate service providers) - Fund administrators and investment managers
**Income from Guernsey land and property** Income arising from land and property situated in Guernsey is taxed at 20%, even for standard 0% companies. This is a critical exception: if your company owns or rents out Guernsey real estate, that income is taxed at the personal income tax rate.
**Economic substance requirements** Since 2019, the 0% rate comes with conditions for companies earning certain types of income (intellectual property, finance and leasing, headquarters, holding company, distribution and service centre, shipping income). These companies must meet Guernsey's economic substance requirements — real management, adequate employees and expenditure, and core income-generating activities conducted in Guernsey. Failure results in penalties and potential referral to the OECD.
**Controlled Foreign Company rules** Guernsey companies that are subsidiaries of UK companies may be subject to UK CFC rules, pulling Guernsey profits into the UK tax base. This is a UK-side issue, not a Guernsey one, but needs planning for UK-owned Guernsey structures.
**Filing the corporate tax return** Every company incorporated in Guernsey must file an annual company tax return (ET1 or ET3 for certain companies) with the States of Guernsey Revenue Service, even if the liability is nil. The return is due 6 months after the company's accounting year end. Late filing attracts penalties starting at £300.
Related terms
A Guernsey Exempt Company is a company incorporated in Guernsey that holds an exemption from corporate income tax granted by the Revenue Service. Historically used for offshore structures, the formal exempt company regime was largely superseded by the zero-10 regime (which made 0% the standard rate). Today it primarily means a company with non-resident shareholders that pays an annual fee and is confirmed exempt from tax on income derived outside Guernsey.
A Principal Company in Guernsey's insurance context refers to an insurer licensed in Guernsey that is the primary insured entity, often used in captive insurance structures. More broadly, 'principal' in Guernsey trust and company law refers to the ultimate beneficiary or controlling party behind a structure. In tax terms, the principal company concept is relevant in controlled and affiliated company rules.
Guernsey's economic substance requirements were introduced in 2019 under the Economic Substance (Companies and Limited Partnerships) (Guernsey) Law 2018. They apply to Guernsey tax-resident companies earning income from specified 'relevant activities'. Companies earning such income must demonstrate real economic presence in Guernsey: local management and decision-making, adequate employees and expenditure, and core income-generating activities conducted in Guernsey.
The States of Guernsey Revenue Service (commonly called the Revenue Service or the States Revenue Service) is the government body responsible for administering income tax, document duty, and social insurance contributions in Guernsey. It is the equivalent of HMRC in the UK or the IRS in the US. It issues assessments, collects payments, and enforces compliance.
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