What does an offshore adviser actually do, and when do you need one?

An offshore adviser helps you work out three things: which country taxes you, what you must report, and whether any structure makes sense at all. They are not a shortcut to paying less tax by magic. For UK people, the starting point since 6 April 2025 is residence, because UK-resident individuals are generally taxed on worldwide income and gains as they arise, whatever their domicile. ¹

What does an offshore adviser actually do?

An offshore adviser works through a sequence of decisions. First, where you're tax-resident. Second, what has to be reported and to whom. Only then do they ask whether a company, trust or bank account abroad would help or just add paperwork.

There's a lot of jargon in this world: FATCAFATCAThe US rules that make banks outside the US report accounts held by US persons, such as US citizens and green card holders., CRSCRS (Common Reporting Standard)The global system where banks report account holders' details and balances to their tax office, which passes them to the country where the holder is tax resident., SRTStatutory Residence Test (SRT)The UK's rulebook for deciding whether you're UK tax resident in a tax year, combining days spent in the UK with your 'ties' to the UK., FIG. It reads like alphabet soup that's been through a tax return. I'll explain each one as we go.

The job is less about exotic islands and more about getting the order right. Residence comes first, then reporting. Structures come last, and often not at all.

This post is general information. Your own position depends on your facts, so take advice before acting on any of it.

Is my problem about where I live, what I must report, or something a structure can't fix?

Most offshore questions land in one of three boxes: where you're tax-resident, what you have to report, or a problem no company or trust abroad can solve. Which box you're in tells you what kind of help you need.

Residence. The statutory residence test, or SRT, is HMRC's set of rules for deciding whether you count as UK-resident in a tax year. ² Since 6 April 2025, UK-resident individuals are generally taxed on worldwide income and gains, so everything else follows from the answer. ¹

Reporting. The Common Reporting Standard (CRS) is a system where banks abroad send account details to the tax office of the country you live in. HMRC says it received information on around 9 million financial accounts from more than 100 jurisdictions under it (publication dated 30 October 2024). ³ That data isn't proof that tax is due, though. Your residency, the type and source of income, reliefs and the rules for the year all matter. ⁴

Something a structure can't fix. Residence is decided by the statutory residence test, not by where a company is set up. ² So if you stay UK-resident, you are generally taxed on worldwide income and gains from 6 April 2025, whatever you own abroad. ¹

What changed on 6 April 2025, and why do older non-dom pages mislead?

From 6 April 2025, the UK stopped using domicile for this part of personal tax and abolished the remittance basisRemittance basisBeing taxed on foreign income only when you bring it into the country, rather than when you earn it.. UK residents are now generally taxed on worldwide income and gains as they arise. ¹ Anything written before then describes a system that has gone.

Domicile was roughly the country you treated as your permanent home. The remittance basis let some non-domsNon-domA tax status that taxed some residents only on foreign income they brought into the country. The UK's version was replaced from April 2025. pay UK tax on foreign income only when they brought it into the UK. It was abolished from 6 April 2025, and domicile is no longer the connecting factor for this part of the individual regime. It's gone, like a fax machine in a museum. ¹

What replaced them is the foreign income and gains (FIG) regime. Qualifying new residents can claim relief on certain foreign income and gains during their first four UK-resident tax years. ¹

The conditions are strict. You must be UK-resident for the year under the SRT, not a sitting MP or peer, and at least 10 years old at the start of the tax year. ⁶ The four years run back to back from your first UK-resident year. You can't start the clock later, eligibility and the claim are assessed year by year, and an unused year can't be carried forward. ⁶

So whether you qualify depends on your own residence history. Check it year by year rather than assuming.

Where are the grey areas?

One thing here is worth being upfront about. The rules themselves are not the grey area. The grey area is how far a structure can really take you, and what happens when people are sold more than that.

Grey doesn't mean off-limits. But the first pitch is the kind that sounds clever and does nothing to change where you're taxed.

I'm leaving the UK: what has to be true for tax to stop?

Your UK tax position changes only when the residence rules say you're no longer UK-resident. Moving your stuff, opening a foreign bank account or getting a residence card abroad doesn't decide it on its own. The SRT does. ²

Now the catch. If the SRT makes you UK-resident for a tax year, you're resident for the whole year. ² The exception is split-yearSplit-year treatmentA UK rule that can split the tax year in two when you arrive or leave, so you're only taxed as UK resident for part of it. treatment, which cuts the year into a UK part and an overseas part. ²

As of October 2026, HMRC describes eight split-year cases in total. Cases 1 to 3 cover departure from the UK. ⁵

• Case 1: starting full-time work overseas. ⁵
• Case 2: you're the partner of someone starting full-time work overseas. ⁵
• Case 3: ceasing to have a home in the UK. ⁵

You must meet every condition of a case, and priority rules decide which one applies if more than one qualifies. ² Case 3 is the one many leavers look at, so here it is step by step.

Leaving doesn't make the UK forget you, either. Someone who isn't UK-resident can still have UK tax obligations in some circumstances. ⁴

I'm settling abroad: what does an adviser sort out there?

On the arriving side, an adviser helps you line up the new country's residency, banking and local tax with your UK exit, so the two sides match. The details depend entirely on the destination, and each country sets its own rules.

This is where the joined-up view earns its keep. One of the routes to Case 3 split-year treatment is becoming tax-resident in your new country within six months. ⁵ So your residency paperwork abroad and your UK exit aren't separate jobs. Timing one moves the other.

Banking ties in too. Under CRS, banks abroad send account details to the tax office of the country you live in. ³ Get your residence position straight first, so you know which country that is.

Before you commit to a destination, ask any adviser to set out three things in writing: what residence there requires, how it's taxed locally, and how it fits your UK leaving date. If they can't connect those to your UK position, that's useful to know early.

What does an adviser tell you NOT to do?

Our view: a good offshore adviser will sometimes tell you not to buy a structure at all. If you're UK-resident, you're generally taxed on worldwide income and gains from 6 April 2025. ¹ That rule turns on residence, and nothing in the evidence suggests an offshore company changes it.

Here's a pitch that a practitioner in our network described in October 2026. The client wanted to cut tax while staying in the UK. The proposal was a Seychelles trust owning a Hong Kong company, set up in a careful order: trust first, then company, then the trust made the owner.

That's a described sales pitch, not proof that the structure works or is compliant. Try one test: ask what in the structure changes your residence. As described, the pitch includes no change of residence, and UK residents are generally taxed on worldwide income and gains. ¹ However neatly the steps are ordered, putting things in order is not the same as moving countries.

Don't assume a structure keeps your accounts out of view. HMRC says it received information on around 9 million financial accounts from more than 100 jurisdictions under the Common Reporting Standard, or CRS, the system where banks report foreign customers' accounts to tax offices. ³ That data isn't proof that tax is due. Your residence, the type and source of income, reliefs and the year's rules all matter. ⁴

HMRC uses this data to prompt people to check and correct returns, including through the Worldwide Disclosure Facility. That's its route for telling HMRC about offshore income you didn't declare. Tax, interest and penalties may be payable, depending on the facts and your conduct. ³ One advisory firm says HMRC's "nudge letters" now include specifics of wealthy taxpayers' offshore affairs. That's the firm's commentary, not an HMRC statement. ⁷

So the "don't" list is short. Don't buy a structure to fix a residence problem, and don't ignore an HMRC letter. ⁸ If one arrives, check it using the contact details on GOV.UK, not the ones in the letter. ⁸

Regulated or unregulated: how do I check who I'm talking to?

Before you hire anyone, find out who supervises them, what they're allowed to advise on, and where you could complain. "Offshore adviser" isn't one job title, and people using it range from tax specialists to company-formation salespeople.

Three questions do most of the work. Who supervises you, and for which services? Can I check that on the supervisor's own register? Who do I complain to if something goes wrong? Get the answers in writing, then check the register yourself rather than trusting a logo on a website.

Then compare the answers with what you're asking for. If you need UK tax advice, ask whether the person is qualified to give UK tax advice. Someone who forms companies abroad may be excellent at forming companies. That's a different job.

What happens on a first call, and what does it cost?

A useful first call works out your residence position, what you must report and whether you need a structure at all, before anyone mentions a jurisdiction. If the call opens with a list of countries, you're getting a brochure with a phone attached.

Order matters here, because residence decides how everything else is read, including any CRS data about you. ^{4 2}

Bring the basics: your UK days and homes for recent years, where you work, and any letters from HMRC. You'll save a second call spent hunting for dates.

Fees vary by adviser and by job, and this guide doesn't quote any. Ask for the fee in writing before work starts, and ask what's included and what counts as extra.

When you don't need an offshore adviser at all

You often don't need one if you're simply UK-resident with some foreign income, or you just need to correct a past return. An ordinary UK tax adviser or HMRC's own routes may be enough. ^{8 3}

HMRC's message is consistent: check whether the right tax was paid, correct anything undeclared, and don't ignore a letter. ⁸ It also uses international data to prompt taxpayers to check and correct returns, including through the Worldwide Disclosure Facility. ³

FAQ

Does an offshore company let me stop paying UK tax while I still live in the UK? The evidence doesn't support that. From 6 April 2025, UK residents are generally taxed on worldwide income and gains, and residence drives the main position. ¹

Is non-dom status still available in 2026? The remittance basis was abolished from 6 April 2025. It was replaced by a residence-based regime with a four-year relief for qualifying new residents. ¹

Can HMRC see my overseas bank accounts? HMRC says it received information on around 9 million accounts from more than 100 jurisdictions under CRS. ³ That data isn't proof that tax is due. ⁴

What do I do if HMRC writes to me about offshore income? Don't ignore it. Check the right tax was paid, and verify the letter using contact details on GOV.UK, not those in the letter. ⁸

How do I leave the UK for tax purposes? It depends on the statutory residence test. Split-year treatment can divide the year if you meet every condition of one of Cases 1 to 3, such as Case 3's requirement of fewer than 16 days in the UK after ceasing to have a UK home. ^{5 2}

Who qualifies for the four-year FIG regimeFIG regimeThe UK's replacement for non-dom rules: people arriving after a long time abroad can be exempt on foreign income and gains for their first few years.? Qualifying new residents must be UK tax-resident for the year under the SRT, within the first four UK-resident tax years after at least 10 consecutive tax years of non-UK residence. They must not be a sitting MP or peer, and must be at least 10 years old at the start of the tax year. ⁶