Guernsey's headline corporate income tax (CIT) rate is 0% (10% banking/insurance/fund admin; 20% property/retail over GBP 500,000).
The headline personal income tax (PIT) rate is 20.
No VAT or GST currently exists in Guernsey - confirmed via KPMG. A Goods and Services Tax has been under active political debate for years and has been repeatedly rejected or delayed: proposals were voted down in the States of Guernsey in 2023 (twice) and again in 2024, before a GST package was tentatively approved in late 2024 pending further review. The most recent detailed proposal (Policy and Resources Committee, June 2026 Tax Reform Package) reduced the proposed rate from 5% to 3% (or 6% if food is excluded from the tax base) and set the earliest possible implementation date at Q1 2028 - itself already pushed back from an original January 2027 target, then July 2027. As of the most recent elections, a majority of newly-elected deputies campaigned on opposing the GST package, so its ultimate adoption, rate, and timeline all remain genuinely unresolved and should not be treated as confirmed.
Companies tax resident in Guernsey are subject to income tax on worldwide income, confirmed via Carey Olsen - residence includes incorporation in Guernsey, or being incorporated outside Guernsey but "centrally managed and controlled" in Guernsey (control meaning strategic control, generally exercised by directors, so the location of board meetings and decision-making is determinative). Individuals electing "resident only" status may pay a standard charge (£40,000, rising to £50,000 from January 1, 2026) in exchange for exemption from Guernsey income tax on worldwide income, remaining taxable only on Guernsey-source income.
Confirmed directly and consistently via two independent sources: PwC states "Guernsey does not currently have specific anti-avoidance legislation in relation to CFCs," and Carey Olsen confirms Guernsey "does not have specific anti-avoidance rules such as transfer pricing, thin capitalisation or controlled foreign company rules." Guernsey instead relies on a broad general anti-avoidance provision targeting any transaction or series of transactions whose effect is the avoidance, reduction, or deferral of a tax liability, with the Director of the Revenue Service holding discretion to make counteracting adjustments.
Confirmed directly via PwC: "Guernsey does not currently have specific thin capitalisation legislation in place," with the same general anti-avoidance provisions described above applying instead of a numeric debt-to-equity test.
No domestic FBAR/Form 8938-equivalent requiring Guernsey residents to self-report their own foreign accounts was identified. Guernsey signed an intergovernmental FATCA agreement with the US (December 13, 2013) and a similar agreement with the UK (October 22, 2013), confirmed via Carey Olsen, with Guernsey "financial institutions" obligated to conduct due diligence and reporting on US-connected account holders since June 2014. Guernsey also participates in the OECD Common Reporting Standard as a Global Forum Working Group member and joined the Convention on Mutual Administrative Assistance in Tax Matters in December 2013. Under the OECD's Pillar Two framework, if a Guernsey-based parent's foreign subsidiary has an effective tax rate below 15% and its jurisdiction has not implemented a Qualifying Domestic Minimum Top-up Tax, Guernsey collects the shortfall as its own top-up tax, confirmed via Carey Olsen. Separately and independently of local law, US citizens and Green Card holders with Guernsey accounts remain obligated to file FinCEN Form 114 (FBAR) once aggregate foreign accounts exceed USD 10,000, and potentially Form 8938, regardless of local requirements.
Confirmed directly via PwC: Guernsey has full double taxation agreements (DTAs) with Cyprus, Estonia, Hong Kong, the Isle of Man, Jersey, Liechtenstein, Luxembourg, Malta, Mauritius, Monaco, Qatar, Seychelles, Singapore, the United Kingdom, and (as of November 26, 2025) Bahrain - 14 named DTA partners. Separately, Guernsey has signed Tax Information Exchange Agreements (TIEAs) with 61 jurisdictions, confirmed via the same source. Guernsey's first TIEA was concluded with the United States in September 2002; per Guernsey's own submission to the European Parliament, Guernsey has never itself refused to negotiate a TIEA or DTA with any territory, though Russia and Panama have declined Guernsey's own offers to negotiate. Unilateral relief is available for tax paid in other jurisdictions at up to three-quarters of the lower of the Guernsey effective rate and the overseas rate, for taxes other than those on dividends or debenture interest.