Moving to the Channel Islands from the UK: the 2026/27 tax guide

Jersey and Guernsey are Crown Dependencies, not part of the UK, and each runs its own tax system. Both tax residents at 20% on income, and neither taxes capital gains or inheritances. Jersey adds a High Value Residency regime for wealthy newcomers; Guernsey offers hard caps on the total annual bill. For a UK taxpayer paying 45% on income and 24% on gains, the arithmetic is not subtle.

But the island systems only take over once the UK one lets go, and that is decided by the UK Statutory Residence Test (RDR3 and the RFIG manual, GOV.UK), not by your Jersey lease or your Guernsey open market purchase. Until you are non-resident under the SRT, the UK taxes your worldwide income and gains wherever you sleep. And because St Helier is 45 minutes from Gatwick, this corridor produces more failed exits than most: directors who keep flying back, families who keep the London house available, until the ties test quietly catches them.

So the plan has three UK-side legs: break residence cleanly under the SRT, claim split-year treatment for the departure year where it applies, and deal properly with what stays UK-connected regardless. Our leaving the UK tax guide covers the general framework; this guide applies it to the islands.

The SRT works through three stages each tax year. The automatic overseas tests make you non-resident if, broadly, you spend fewer than 16 UK days (having been resident recently), fewer than 46 (having not been), or you work full-time abroad with fewer than 91 UK days and no more than 30 UK workdays. The automatic UK tests catch people with 183 or more UK days, a UK home in the required pattern, or full-time UK work. If neither decides it, the sufficient ties test counts your connections, family, accommodation, work, 90-day history and country ties, against a sliding day-count scale.

Two island-specific points. First, Jersey and Guernsey are outside the UK for the SRT, so island days are days abroad, and a full-time job in St Helier or St Peter Port can satisfy the third automatic overseas test just as a Singapore job would. Second, proximity is a tie-generating machine: a leaver who keeps a UK home available and whose family stays behind can find that 46 UK days is the entire annual allowance. More than three hours of work in a UK day is a UK workday, and London board meetings count. Count days at midnight, keep evidence, and model the year before you book flights.

For most movers the realistic routes are full-time work abroad or a disciplined ties-based exit; our Statutory Residence Test guide works through each test in detail.

UK residence is normally all or nothing for the whole tax year, but if you leave part-way through, split-year treatment can divide the year at departure so the overseas part is taxed as if you were non-resident. For leavers the main cases are starting full-time work overseas (Case 1), accompanying a partner who does (Case 2), and ceasing to have a UK home (Case 3). Get the case right and your island salary is outside UK income tax from day one; get it wrong and the whole year stays UK-taxable.

Mechanically, split year is claimed on the SA109 residence pages of your Self Assessment return, not by leaving the country. The P85 form tells HMRC you have left and reclaims overpaid PAYE, but you do not use it if you will file a return for the departure year, and most people reading this guide will: rental income, gains, dividends or a split-year claim all keep you in the return system. Non-residents cannot use HMRC's online filing for the SA109, so the final return goes in on paper by 31 October or through software by 31 January.

Before you go, also decide on National Insurance: island years do not build your UK State Pension, and voluntary contributions from abroad are cheapest arranged at departure.

Non-residence removes your worldwide income from UK tax, but UK-source income and UK property gains stay connected. The table summarises the main items for an island resident.

In the departure year: register for the NRL scheme before the first rent payment after you leave, diarise the 60-day deadline against any sale, and do not start pension drawdown until the NT code is in place, because unwinding PAYE deducted in error takes months.

Jersey taxes ordinarily resident individuals on worldwide income at a standard 20% of net income after allowances, with an automatic alternative marginal calculation at 26% after higher exemption thresholds; you pay whichever is lower. Residence follows six months on the island in a year, maintaining available accommodation and staying even one night, or habitual visits averaging around three months a year, and the rules are under review (PwC Worldwide Tax Summaries, reviewed July 2026). There is no capital gains tax, no inheritance tax and no wealth tax; GST runs at 5%, and employee social security at 6% up to a monthly earnings cap.

High Value Residency is Jersey's route for wealthy incomers, and it is a housing consent as much as a tax deal: HVR status is what lets a newcomer buy or lease higher-value Jersey property. For applicants from 14 July 2023 the deal is a minimum annual tax contribution of £250,000, via a dedicated rate structure: Jersey property income at 20%, the first £1.25 million of other worldwide income at 20%, and 1% on the excess. If your income would not produce £250,000 of tax, you are deemed to receive enough to get there; the £250,000 is a floor (Government of Jersey HVR tax guidance).

The arithmetic suits very high earners: on £5 million of annual income the Jersey bill is roughly £287,500, an effective rate under 6%. Applications are assessed on wealth, property and contribution, so engage a Jersey adviser early. Ordinary movers taking island jobs do not need HVR; they simply pay the standard 20%.

Guernsey charges a flat 20% on net income after allowances. Residence is graded by day count: broadly, 182 or more days makes you principally resident, and 91 or more days without spending 91 or more in any other single jurisdiction makes you solely resident. Other patterns, such as 91 days alongside a bigger presence elsewhere, or 35 days on top of a substantial visiting history over the previous four years, make you resident only. Solely and principally resident individuals are taxed on worldwide income; someone resident only can instead elect a £50,000 standard charge covering non-Guernsey income (PwC Worldwide Tax Summaries, reviewed December 2025).

The caps are the headline for wealthy movers. For 2025 a Guernsey resident can cap tax on non-Guernsey-source income at £160,000 a year, or on worldwide income at £320,000. On top sits the open market newcomer cap: buy an open market property for more than £1.5 million around arrival and annual tax can be capped at £60,000 for the year of arrival and the following three years. The figures move with island budgets, so verify the current numbers with a Guernsey adviser before you commit.

Like Jersey, Guernsey has no capital gains tax, no inheritance tax and no wealth tax. Unlike Jersey, it currently has no VAT or GST at all, though the 2025 island Budget proposed a GST for 2027. Employee social security runs at 7.4% up to a monthly cap. Alderney shares Guernsey's tax system; Sark has its own arrangements.

From 1952 until 2018 the UK's arrangements with Jersey and Guernsey were narrow documents covering little beyond business profits and employment, and much of the internet still describes that world. It is gone. The UK signed comprehensive agreements with both islands on 2 July 2018, in force from 19 December 2018 for Jersey and 7 January 2019 for Guernsey, each effective for UK income tax from 6 April 2019 (Jersey and Guernsey treaty pages, GOV.UK). The old arrangements are formally terminated.

The pension answer is now the modern one. Article 17 of each agreement provides that pensions and other similar remuneration paid to a resident of one territory are taxable only in that territory, subject to Article 18, under which government service pensions broadly remain taxable by the paying state. In practice an island-resident retiree drawing a UK personal pension or SIPP pays island tax at 20% and claims UK relief, usually ending with an NT code, while a retired civil servant's pension generally stays within UK tax. Article 13 preserves UK taxing rights over gains on UK land and land-rich shares, so the treaties do not blunt NRCGT.

Dividends are broadly exempt from source-state tax under Article 10, with a carve-out for property-income vehicles such as REITs, and the agreements carry a principal purpose test, so benefits fall away for arrangements set up mainly to obtain them. If a sloppy exit leaves you resident in both places at once, the Article 4 tie-breaker decides.

Proximity makes short stints common, and that is exactly what the temporary non-residence rules punish. If you were UK resident in at least four of the seven tax years before departure and return within five years, gains realised while away, plus certain income such as dividends from your own close company, are taxed in your year of return as if you had never left (HMRC Capital Gains Manual CG26500). Selling a business from Jersey, CGT-free locally, only holds if the absence genuinely exceeds five years; our guide to returning to the UK covers the mechanics.

Many movers keep UK business links, and two sets of rules need respect. First, company residence: a Jersey-incorporated company whose central management and control actually sits in UK boardrooms is UK resident, so board process matters more than the certificate of incorporation. Second, the transfer of assets abroad legislation (HMRC International Manual INTM600000) charges UK-resident individuals who transfer assets so that income arises to a person abroad while they retain the power to enjoy it, with a separate benefits charge. It bites on structures set up before you leave, on any spouse who stays UK resident, and on you again if you return, subject to a defence for genuine commercial arrangements without a tax avoidance purpose.

The clean pattern is unglamorous: real relocation, board meetings held where the company is meant to be, contemporaneous minutes, and no island wrapper doing work the facts do not support. Done properly this is straightforward compliance, not a fight.

Neither island has inheritance tax, and that lures people into assuming the move fixes UK IHT. It does not. Since 6 April 2025 the rules are residence-based: you are a long-term UK resident if you were UK resident for at least 10 of the previous 20 tax years, and long-term residents are within UK IHT on their worldwide estates (GOV.UK guidance). Leaving does not switch that off at the ferry terminal: the status persists for between 3 and 10 tax years after departure depending on how long you were resident, with the full 10-year tail for those with 20 years of residence behind them.

So a lifelong UK resident who moves to Guernsey at 55 remains exposed to 40% UK IHT on their worldwide estate for a decade, whatever island law says. UK-situated assets, the London flat, UK company shares, stay within UK IHT permanently regardless of status. What the move buys, for those who stay the course, is a clean position once the tail expires, and the gifting rules and ordinary seven-year planning keep working meanwhile. Wills and probate need local advice: the islands have their own succession law.

We act on the UK side of this corridor: SRT planning and evidence, the split-year claim, the final return with SA109, NRL registration, 60-day NRCGT reporting, treaty claims and NT codes for pension drawdown, and the IHT tail. For island filings, HVR applications and open market housing you need a Jersey or Guernsey adviser, and we are used to working alongside them.

Everything is on fixed fees agreed upfront: personal tax returns from £350, non-resident and expat returns from £550, and complex cross-border work, where treaty pension claims and exit planning usually sit, from £750. If a Channel Islands move is on your horizon, book a free 30-minute clarity call and we will tell you what your exit involves and what it would cost to run properly. There is more on our expat tax adviser service page and in working with a UK tax adviser.