Guernsey Tax Cap: Limits, Residency Rules, and How to Elect

The Guernsey tax cap limits the total income tax a resident pays each year to one of three figures for the 2026 year of charge: £160,000 on non-Guernsey source income, £320,000 on worldwide income, or £60,000 for new residents who buy qualifying Open Market property. You have to elect the cap each year, and some Guernsey income sits outside every version of it.¹

The Three Caps and What Each One Covers

Guernsey taxes income at a flat 20%. The cap is a ceiling on top of that rate for individuals resident on the island and subject to tax on worldwide income.

£160,000 on Non-Guernsey Source Income

The lower standard cap applies to “qualifying income,” which Guernsey defines as income from outside the island plus Guernsey bank interest. Any other Guernsey-source income — local wages, business profits, and so on — counts as “non-qualifying” and is taxed at 20% on top of the £160,000.¹

This option suits people whose wealth is almost entirely offshore. If your income is foreign dividends and investment returns with only bank interest on the island, £160,000 effectively becomes your total Guernsey bill.

£320,000 on Worldwide Income

The higher cap covers both qualifying and non-qualifying income together, so total tax across all sources is capped at £320,000. Guernsey wages, local business profits, and foreign income all sit inside this ceiling.¹

The worldwide cap fits anyone with substantial Guernsey-source income, or anyone whose income is only from Guernsey. It is also the right choice when local earnings would otherwise push a large tax bill through the top of the £160,000 cap.

£60,000 Open Market Cap for New Residents

Newcomers who buy a qualifying property can access a much lower cap covering both Guernsey and non-Guernsey source income. The Open Market cap is £60,000 per year and runs for the year you arrive plus the three years after — a four-year window in total.¹

To qualify you must meet all of the following:

You were not resident in Guernsey in the three years before you arrive.
You pay at least £50,000 in document duty on a property listed on Part A of the Open Market Register. From 2024, anti-avoidance duty on the purchase of all shares in a company that owns such a property also counts.
The property is bought within 12 months before or after you take up permanent residence.

Document duty in Guernsey runs on a sliding scale from 2.25% on the first £300,000 up to 7% on amounts above £5 million, so hitting £50,000 in duty generally requires a purchase price of roughly £1.3 million or more.

Since 2023, Guernsey applies independent taxation. Spouses and civil partners are assessed separately, the cap applies to each individual’s own income, and each person must file their own election. For the Open Market cap, each spouse must independently meet the eligibility conditions.¹

Alderney’s Parallel Cap

Guernsey tax law extends to Alderney, and Alderney has its own newcomer cap. From 2025, the Alderney property tax cap is £60,000 per year and applies on the purchase of any Alderney residential property, not just Open Market listings. A legacy £50,000 cap applied from 2016 through 2023 for those who qualified before 2024, and first-time qualifiers in 2024 were subject to a £65,000 cap before the £60,000 figure took effect.¹

Residency Rules That Gate the Cap

The cap is only available if you are resident in Guernsey and taxed on worldwide income, so the day count matters. Guernsey uses a “midnight test”: you are treated as present on any day you are on the island at midnight, meaning arrival days count and departure days do not.

Resident: 91 days or more in the calendar year, or 35 days combined with at least 365 days over the previous four years.
Solely Resident: Resident in Guernsey and not resident anywhere else. Guernsey treats you as resident elsewhere if you spend 91 or more days in that jurisdiction.
Principally Resident: 182 days or more on the island, or 91 days combined with at least 730 days over the previous four years. A separate rule applies if you move to Guernsey to take up permanent residence, provided you were not resident the year before and you become solely or principally resident the following year.

Solely or principally resident individuals are the ones taxed on worldwide income and therefore the ones for whom the cap is designed. Keep an accurate day count throughout the year; the Revenue Service works from your self-reported filings.²

Income That Sits Outside Every Cap

Two categories of income are always taxed at the full 20% rate on top of whatever cap amount you owe:

Guernsey land and property income. Rental profits, lease premiums, and any other income from Guernsey real estate are carved out of the standard, Open Market, and Alderney caps. If you own rental property on the island, that income is fully taxable no matter which cap you elect.
Certain Guernsey pension encashments. Since 2020, lump-sum withdrawals and triviality payments from Guernsey pension or annuity schemes that include tax-relieved contributions are excluded. The tax-free lump sum itself remains tax-free, but amounts above that limit are taxed at 20% on top of the cap.

There is also a subtle difference in how Guernsey wages are treated. Under the £160,000 cap they are non-qualifying and taxed separately at 20%. Under the £320,000 cap they fall inside the ceiling. Someone with meaningful local employment income needs to run both numbers before electing.¹

How to Elect the Cap

The cap is not automatic. You elect it each year by filing the appropriate tax cap form with the Revenue Service. If you qualify, you do not file a full personal return with itemised income; the cap election form takes its place. The Open Market cap uses a separate Form A2.¹

The form asks you to identify the year of charge, the cap you are electing, and a breakdown of income by source and geography. For the £160,000 cap you must clearly separate qualifying income from non-qualifying income. Supporting records — foreign investment statements, dividend vouchers, interest reports, and for the Open Market cap the property purchase and duty documentation — back up the figures.

Self-employed and investment income is paid through interim quarterly assessments due on 15 April, 15 July, 15 October, and 15 January. Once the Revenue Service issues a final assessment reflecting the cap, any balancing payment is due within 30 days.

The Standard Charge as a Floor

Guernsey also imposes a minimum annual tax called the Standard Charge on certain residents defined in the Income Tax Law. For 2026, the States of Guernsey approved an increase from £40,000 to £50,000. It is separate from the cap, though anyone electing the cap will typically owe more than the Standard Charge in any event.³

Other Guernsey Taxes and Non-Taxes

The cap is one piece of a broader picture. Guernsey does not charge capital gains tax, inheritance tax, wealth tax, or value-added tax. Investment gains on shares and non-Guernsey property are not taxed on sale, and no estate or inheritance duty applies at death. These absences are much of why the cap is attractive in the first place: a wealthy resident is capping income tax on a base that already excludes most of the other charges other jurisdictions would apply.

If You Are a U.S. Citizen

American citizens and green card holders are taxed by the IRS on worldwide income regardless of where they live, so electing a Guernsey cap does not switch off U.S. tax. The foreign tax credit on IRS Form 1116 can offset some of the double taxation for Guernsey taxes that qualify as creditable foreign income taxes.⁴

The credit is limited to the lesser of the foreign tax actually paid or a proportional share of your U.S. liability based on the ratio of foreign-source taxable income to total taxable income. Because the Guernsey cap can drive an effective rate well below 20% on very high incomes, the foreign tax credit may not fully eliminate U.S. tax on that income. Work through the interaction with a cross-border tax adviser before assuming the cap delivers the full saving it appears to on paper.

1
States of Guernsey. Tax Cap
2
States of Guernsey. Residence and Your Tax Liability
3
Guernsey Parliament. The States of Guernsey Annual Budget for 2026
4
Internal Revenue Service. Foreign Tax Credit – How to Figure the Credit