Tax in the Channel Islands is run by Jersey and Guernsey separately from the United Kingdom, and each island sets its own rules through its own parliament. Both charge a flat 20% income tax, neither charges capital gains or inheritance tax, and the default corporate rate is 0%. What you actually pay depends on how many days you spend on the island, what kind of income you earn, and whether you own property there.
When You Become a Tax Resident
Residency is the switch that turns local tax on. Jersey treats you as resident once you spend 183 days or more on the island in a tax year. Guernsey’s threshold is lower: 91 days in a calendar year, or as few as 35 days if you’ve accumulated 365 days in Guernsey over the previous four years.1States of Guernsey. Residence and Your Tax Liability
Both islands then split residents into deeper categories that decide whether your worldwide income is taxable or only your island-source income. Jersey adds an “ordinarily resident” status for people who keep a home on the island or whose visits average 90 days a year over four consecutive years. Guernsey distinguishes “solely resident” (resident here and not spending 91+ days anywhere else) from “principally resident” (182+ days in Guernsey, or 91+ days with 730 days accumulated over four years).1States of Guernsey. Residence and Your Tax Liability
If you’re solely or principally resident, your worldwide income is on the table. If you’re resident but not in one of those deeper categories, you’re generally taxed only on Guernsey-source income plus any foreign income you remit to the island. Non-residents pay tax only on locally sourced income, such as rent from island property. Keep travel records. Crossing a threshold by a single day changes what you owe.
What You Pay on Income
Both islands apply a flat 20% rate to taxable income.2Government of Jersey. Moving to Jersey: Money and Tax3States of Guernsey. Income Tax Rates and Allowances That is a ceiling, not a floor. Personal allowances cut it down. Jersey’s single-person exemption threshold for 2026 is £21,250.4Government of Jersey. 2026 Tax Allowances and Reliefs Guernsey’s 2026 personal allowance is £15,200. Married couples and civil partners who elect joint assessment get higher allowances in both places.
Jersey calculates each resident’s bill two ways: a standard 20% on income after allowances, and a marginal calculation that applies graduated rates to total income. You pay whichever is lower. Guernsey works similarly, so lower earners aren’t taxed at the full flat rate.
Social Security and Long-Term Care
Income tax is not the whole deduction. Both islands charge social contributions that fund pensions and health-related benefits.
Jersey employees pay social security on earnings, and residents also owe a Long-Term Care contribution capped at 1.5% of total income, calculated after the same allowances that apply to income tax.5Government of Jersey. How Long-Term Care Is Funded Guernsey requires contributions from employees, employers, and the self-employed at rates that depend on employment status. Both systems apply an upper earnings limit.6States of Guernsey. Social Security Contributions
One gap matters for Americans: the U.S.–U.K. Social Security totalization agreement references England, Scotland, and Wales but does not appear to cover Jersey or Guernsey.7Social Security Administration. Totalization Agreement with United Kingdom A U.S. citizen working in the Channel Islands can end up contributing to both systems without the usual treaty relief.
Corporate Tax Under Zero-Ten
The default corporate income tax rate on both islands is 0%. Most trading and holding companies pay no tax on their profits. Higher rates apply to specific sectors:
- Financial services companies (banks, fund administrators, insurers, and other regulated businesses) pay 10%.
- Utilities providing electricity, water, and telecommunications pay 20% on local profits.
- In Jersey, large corporate retailers with taxable profits above £750,000 pay 20%.8Government of Jersey. Large Corporate Retailers Guidance Notes
- Rental income from island property and property development profits are taxed at 20% for all companies.
Companies carrying out relevant activities also have to show real substance on the island: local direction and management, adequate employees, physical premises, and local expenditure.9States of Guernsey. Economic Substance In Jersey, a first substance failure carries a penalty of up to £10,000. A second failure the following year carries up to £100,000, and the tax authority can recommend striking the company from the register.10Jersey Legal Information Board. Taxation (Companies – Economic Substance) (Jersey) Law 2019 Guernsey applies comparable penalties.
GST and Other Consumption Taxes
Here the two islands part ways. Jersey charges a flat 5% Goods and Services Tax on most goods and services supplied on the island, including imports.11Government of Jersey. GST Taxed on Goods and Services Businesses with taxable turnover over £300,000 a year must register.12Government of Jersey. Registering Your Business for GST
Guernsey has no general consumption tax. No GST, no VAT.3States of Guernsey. Income Tax Rates and Allowances That may change. The States of Deliberation included proposals in its 2025 Budget to implement a GST by mid-2027, with discussion of either a 5% rate that includes food or a 6% rate that excludes it. The timeline has already slipped by six months, so the final shape and date are still open.
Both islands levy excise duties on tobacco, alcohol, and motor fuel, adjusted each year through the budget process.
Property Purchase and Ownership Taxes
Neither island charges UK-style stamp duty, but both tax property transactions heavily.
Jersey applies a Land Transaction Tax on progressive bands, starting at 0.5% on the first £50,000 of value and climbing to 11% on the portion above £6 million. A higher-rate schedule for certain transactions starts at 2.5% and reaches 13% above £6 million. First-time buyers pay nothing on the first £350,000 and 1% between £350,000 and £600,000, with the relief phasing out over £700,000.13Government of Jersey. Calculating Your Land Transaction Tax
Guernsey charges document duty on conveyances using its own progressive bands, from 2.25% on the first £300,000 up to 7% on amounts above £5 million. A purchase around £500,000 works out to roughly £13,750 in duty.
Ongoing occupation costs money too. In Jersey, property owners and occupiers pay annual parish rates and islandwide rates based on the rateable value of their land. Each Parish Assembly sets its own budget, so parish rates vary; the islandwide rate is set by the Supervisory Committee of the twelve parish Connétables and applies uniformly.14Government of Jersey. Parish and Islandwide Rates If you own or occupy on January 1, you’re liable for the full year regardless of a later sale or move. Guernsey has a comparable parish-based system.
What the Islands Don’t Tax
Several wealth-based taxes that exist in the UK don’t exist here. There is no capital gains tax in either Jersey or Guernsey, so proceeds from selling shares, property, or other assets aren’t taxed on the gain. There is no gift tax on transfers between individuals during their lifetimes. And there is no inheritance tax, so estates pass to beneficiaries without a percentage levy on total value.
Estates still pay probate fees. Under the Stamp Duties and Fees (Jersey) Law 1998, estates up to £100,000 pay £50 per £10,000 (effectively 0.5%), and estates between £100,000 and £13,360,000 pay £500 plus £75 per additional £10,000.15Jersey Legal Information Board. Stamp Duties and Fees (Jersey) Law 1998 The fee caps at £100,000 for estates above £13,360,000.16Courts of Jersey. Probate Registry Services and Fees Guernsey applies similar document duties on grants of probate based on the value of the personal estate.
High-Value Residency Options
Both islands run schemes aimed at wealthy movers, structured very differently.
Jersey 2(1)(e) Status
Jersey’s High Value Residency program taxes the first £1,250,000 of worldwide income at 20% and drops to 1% on everything above. Rental income from Jersey property stays at 20% regardless of the cap.17Government of Jersey. High Value Residency Applicants must show sustainable annual worldwide income comfortably in excess of £1,250,000, and the minimum annual tax payment is £250,000. Approval is discretionary.
Guernsey Tax Cap
Guernsey offers tiered caps. New residents who buy an Open Market property and pay at least £50,000 in document duty can cap their annual tax at £60,000 for their first four years. After that, or without the Open Market purchase, the standard cap is £160,000 for residents with only non-Guernsey income, or £320,000 for those with a mix. Income from Guernsey land and buildings is taxed at 20% on top of the cap.18States of Guernsey. Tax Cap
Filing Deadlines and Penalties
Jersey personal tax returns for 2025 are due by May 31, 2026 on paper or July 31, 2026 online.19Government of Jersey. Revenue Jersey Reminds Islanders of Approaching Paper Tax Return Deadline Miss either date and you’ll pay an immediate £300 fine. If the return is still outstanding three months later, £50 per month accrues on top, up to £450.20Government of Jersey. Penalties for Late Personal Tax Returns Jersey corporate returns start at £300 for late filing and then £100 per month for up to nine additional months.21Government of Jersey. Applying for a Late Return Penalty to Be Cancelled or Waived
Guernsey uses surcharges on unpaid tax rather than flat filing fines, with further surcharges every six months the balance remains open.22Guernsey Legal Resources. Income Tax (Surcharges and Supplements) (Guernsey) (Amendment) Law, 2005 In either jurisdiction, sustained non-compliance can escalate to court proceedings and asset recovery.
A Note for Americans
The United States taxes citizens and green card holders on worldwide income wherever they live, and there is no income tax treaty between the U.S. and either Jersey or Guernsey.23Internal Revenue Service. U.S. Citizens and Residents Abroad Filing Requirements The main relief is the foreign earned income exclusion, which for 2026 allows qualifying taxpayers to exclude up to $132,900 of foreign earned income.24Internal Revenue Service. Figuring the Foreign Earned Income Exclusion A foreign tax credit for tax paid to Jersey or Guernsey can also offset U.S. liability. Investment income, capital gains, and self-employment income don’t qualify for the earned income exclusion, so Americans with substantial passive income can still face double taxation.
Two reporting requirements sit on top of the tax return. If your foreign financial accounts exceed $10,000 in aggregate at any point in the year, you must file a FinCEN Report 114 (FBAR).25FinCEN. Report Foreign Bank and Financial Accounts If your specified foreign financial assets exceed $200,000 at year-end or $300,000 at any point in the year (for single filers living abroad), you must also file Form 8938 with your return.26Internal Revenue Service. Instructions for Form 8938 Penalties for missing either filing are severe and separate from any tax owed. Low local tax rates do not mean low compliance obligations for Americans.