Ask a group of British yacht crew about their UK tax position and one answer comes up again and again: "I'm hardly ever in the UK, so I'm not resident." It's an understandable assumption. You might spend ten months of the year in the Mediterranean or the Caribbean, paid in euros or dollars by an employer based somewhere else entirely.
But UK tax residency isn't decided by where you spend most of your time, or where your employer is, or which flag the yacht flies. It's decided by the Statutory Residence Test, and that test contains special rules for people who work on board ships, some of which work against crew rather than for them.
Getting it wrong can be expensive. A crew member who wrongly assumes they're non-resident may have years of undeclared UK tax on their worldwide earnings. One who wrongly assumes they're resident may miss out on planning that would have saved them money. This guide explains how the rules actually apply to life on board.
Where you work is not the same as where you're resident
The most common misconception is that working overseas equals being non-resident. For most workers, there is an automatic test that treats someone working full-time abroad as non-resident, provided they keep their UK visits within limits. Many crew assume that test applies to them.
Often, it doesn't. The Statutory Residence Test treats jobs on board ships differently, and for many crew, the "full-time work overseas" route simply isn't available. That means their residence status comes down to day counts and their connections with the UK, which is a very different exercise.
A quick recap of the Statutory Residence Test
The Statutory Residence Test (SRT) has applied since April 2013. Each tax year is looked at separately, so you can be resident one year and non-resident the next. The test works in three stages:
The automatic overseas tests.
If you meet any of these, you're non-resident for the year and can stop there.
The automatic UK tests.
If you meet none of the overseas tests but meet any of these, you're UK resident.
The sufficient ties test.
If neither set of automatic tests settles it, your status depends on the number of days you spend in the UK combined with how many "ties" you have to the UK.
Our guide to the Statutory Residence Test covers each stage in detail. Here we focus on how it applies to people working on yachts.
The special rules for "relevant jobs" on board ships
The legislation recognises that some people's work consists of travelling across borders. It describes these as "relevant jobs" on board a vehicle, aircraft or ship.
Do you have a relevant job?
You have a relevant job if two conditions are met. First, your employment (or trade) consists of duties performed on board a ship while it is travelling. Second, substantially all of the trips you make in doing that job are cross-border trips, meaning they cross an international boundary.
HMRC's guidance lists mariners among the typical examples, and says that although each case turns on its own facts, someone is likely to be treated as having a relevant job if 80% or more of their journeys involve cross-border trips.
Many crew on internationally cruising yachts will meet this definition. Crew on a yacht that spends most of its time on domestic passages, or that sits in one country's waters for the season, may not.
Why it matters: the full-time work overseas test is switched off
This is the rule that catches people out. If you have a relevant job at any time in the tax year and make at least six cross-border trips that begin or end in the UK, neither the third automatic overseas test (working full-time overseas) nor the third automatic UK test (working full-time in the UK) applies to you.
In plain terms, you can't be non-resident just because you work full-time overseas. You'll need to rely on one of the other automatic overseas tests, which are purely day-count tests, or on the sufficient ties test.
If you have a relevant job but make fewer than six cross-border trips that begin or end in the UK, the normal full-time work tests can still apply. For crew on yachts that rarely call at UK ports, that's worth checking carefully.
How your working days are counted
The relevant job rules also change how UK working days are counted for the "work tie". On any day you make a cross-border trip that starts in the UK, you're treated as having worked more than three hours in the UK that day, even if you actually only worked for an hour before departure. A trip that starts outside the UK is treated as not being UK work, provided you don't also make a trip starting in the UK that day.
For crew who regularly join or depart from UK ports, this can quietly build up the number of UK work days and make the work tie easier to meet.
Counting your days in the UK
For most purposes, you spend a day in the UK if you're in the UK at the end of that day, meaning at midnight. There are limited exceptions, including for days where you're only passing through in transit.
For crew, a few practical points follow:
Days aboard in UK waters can count.
If the yacht is moored or cruising in UK waters at midnight, that day may well count as a day in the UK, even if you never set foot ashore.
Leave and rotation days count.
Time at home between rotations, visits to family and UK-based training courses all add to the total.
Records matter.
Your discharge book, crew lists, the yacht's log, travel bookings and passport stamps are the evidence if HMRC asks. Keep them.
The automatic overseas tests for crew
With the full-time work overseas test often unavailable, most crew who want certainty rely on the day-count tests. You're automatically non-resident for a tax year if:
- you were UK resident in one or more of the previous three tax years and spend fewer than 16 days in the UK in the year, or
- you were UK resident in none of the previous three tax years and spend fewer than 46 days in the UK in the year.
For a crew member who has recently left the UK, 16 days is not many. A couple of weeks at home over Christmas is enough to fail the first test, at which point the sufficient ties test decides the outcome.
The sufficient ties test for crew
If no automatic test applies, your status depends on how many days you spend in the UK and how many UK ties you have. The fewer days you spend here, the more ties it takes to make you resident. The five ties are:
Family tie.
Your spouse or civil partner, a partner you live with as a couple, or a child under 18 is UK resident.
Accommodation tie.
You have accommodation available in the UK for a continuous period of 91 days or more and spend at least one night there in the year. A family home or a relative's house can count in some circumstances.
Work tie.
You do more than three hours of work in the UK on at least 40 days in the year, with the special counting rules for relevant jobs described above.
90-day tie.
You spent more than 90 days in the UK in either of the previous two tax years.
Country tie.
This applies only to people who were UK resident in one or more of the previous three years, and is met if the UK is the country where you spent the most midnights in the year.
The country tie deserves special mention for crew. If the yacht moves between several countries during the year, you may spend no more than a few weeks in any single country. In that situation, a relatively modest amount of time at home in the UK can make the UK the country where you spent the most midnights, even though you spent most of the year away.
The number of ties needed depends on your UK days and whether you were resident in any of the previous three years:
| Days in the UK in the tax year | Previously resident (leaver): ties needed to be resident | Not previously resident (arriver): ties needed to be resident |
|---|---|---|
| Fewer than 16 | Always non-resident | Always non-resident |
| 16 to 45 | 4 or more | Always non-resident |
| 46 to 90 | 3 or more | All 4 |
| 91 to 120 | 2 or more | 3 or more |
| 121 to 182 | 1 or more | 2 or more |
| 183 or more | Always resident | Always resident |
A typical British crew member who left the UK recently, has a partner at home and a family house they can stay in, may well have three or four ties. With four ties, as few as 16 days in the UK can make them resident.
Can a yacht be your home?
The SRT has an automatic UK test based on having a home in the UK, and the accommodation tie turns on having accommodation available. HMRC accepts that a vessel can be a home in some circumstances, depending on how it's used and how permanent the arrangement is.
For most crew living aboard their employer's yacht, the yacht isn't treated as their home in this sense. But owners and crew who live aboard their own boat in UK waters, or whose base is a UK-moored yacht, should take advice, because this can change the answer significantly.
If you are UK resident: the Seafarers' Earnings Deduction
Being UK resident doesn't necessarily mean paying UK tax on all your crew earnings. The Seafarers' Earnings Deduction (SED) can reduce the tax on qualifying seafaring income to nil.
The key conditions, in summary, are:
- you're employed on a ship and perform all, or substantially all, of your duties on board;
- you're UK resident, or resident in an EEA state other than the UK;
- you have an "eligible period" of at least 365 days, which can be built from consecutive days of absence from the UK, or a combined period where at least half the days are days of absence; and
- the voyages involve calls at ports outside the UK.
The eligible period rules are precise. A day of absence is generally one where you're outside the UK at midnight, and time back in the UK between periods abroad can only be bridged if it's no more than 183 days and the half-absence rule is still met. Crown employees, such as Royal Navy personnel, are excluded, and the deduction applies to income tax only, not National Insurance.
SED is claimed through Self Assessment, and HMRC does look at claims closely. We'll cover it in more depth in a separate article, but the headline for crew is this: for some UK residents, SED can produce a better outcome than trying, and failing, to be non-resident.
Other points crew should know
National Insurance follows different rules
Residence for income tax and liability to National Insurance are separate questions. Where you pay social security depends on the employer, the flag of the yacht, your own circumstances and any social security agreements between the countries involved. Some crew end up paying nothing anywhere, which can affect entitlement to the UK State Pension. Voluntary contributions may be worth considering.
Split-year treatment
In the year you leave the UK to start working at sea, or return to settle back home, split-year treatment may allow the year to be divided into a UK part and an overseas part. The conditions are specific, and the rules for people starting full-time work overseas are modified for those with relevant jobs, so it's worth checking which case, if any, applies.
Temporary non-residence
If you become non-resident and return to the UK within about five years, certain income and gains arising while you were away can be taxed on your return. Crew who plan to spend a few years at sea and then come home should factor this in.
Other countries may have a claim too
Being non-UK resident doesn't mean you aren't tax resident anywhere. Depending on where you spend your time, where your home and family are, and where the yacht is based, another country may consider you resident. Where two countries both do, a double tax treaty will usually decide which has the primary right to tax you.
Frequently asked questions
I'm at sea most of the year. Am I automatically non-UK resident?
No. Many crew have a "relevant job" under the SRT, which means they can't use the automatic test for working full-time overseas. Their status then depends on day counts and UK ties, and it's quite possible to spend most of the year at sea and still be UK resident.
Do days on the yacht in UK waters count as days in the UK?
They can. The general rule is that you spend a day in the UK if you're here at midnight, and being aboard a yacht in UK waters at midnight can count. Keep a record of where the yacht is each night.
Does the yacht's flag or my employer's location decide my residence?
No. Neither the flag state nor where your employer is based decides your UK residence. They may be relevant to National Insurance and to where your earnings are taxed, but residence depends on the SRT.
Can I claim the Seafarers' Earnings Deduction if I'm non-resident?
Generally, only if you're resident in an EEA state other than the UK, and then only against earnings that are taxable in the UK. The deduction is primarily designed for UK resident seafarers.
What records should I keep?
Your discharge book, contracts, payslips, crew lists, the yacht's itinerary or log, travel bookings and a day-by-day record of where you were at midnight. Good records are the difference between an easy conversation with HMRC and a difficult one.
Do I need to file a UK tax return?
If you're UK resident with income that isn't fully taxed at source, or you're claiming the Seafarers' Earnings Deduction, you'll usually need to file a Self Assessment return. Even if you believe you're non-resident, a return may be advisable in the year you leave, to record your status and any split-year claim.
How Higginson James can help
At Higginson James, our maritime work combines UK tax expertise with a practical understanding of how life on board actually works. We help yacht crew, and the owners and management companies who employ them, to:
- Work through the Statutory Residence Test year by year, using real day counts and ties.
- Establish whether the relevant job rules apply and what that means in practice.
- Assess eligibility for the Seafarers' Earnings Deduction and prepare well-evidenced claims.
- Plan the timing of leaving or returning to the UK, including split-year treatment.
- Understand National Insurance and pension implications.
If you're unsure of your position, or you've been assuming you're non-resident without checking, get in touch to arrange a consultation. It's far easier to put things right early than to explain several years of assumptions to HMRC later.
This article is a general overview of UK rules as at September 2026. It isn't tax advice for your specific circumstances. Residence and the Seafarers' Earnings Deduction depend on detailed conditions, and you should take advice based on your own facts before relying on either. We reference Statutory Residence Test based on HMRC guidance (RDR3) as at September 2026.