Do Yacht Crew Pay Tax? The Seafarers’ Earnings Deduction Explained

Reviewed by a specialist seafarer tax adviser at Marine Accounts, September 2026

Ask a group of yacht crew whether they pay UK tax and you’ll get three very different answers. Someone will shrug. Someone will look genuinely confused. And someone will say “no” with total confidence, which is sometimes right and sometimes a problem waiting to happen.

The truth sits somewhere in the middle, and it’s worth understanding properly, whether you’re brand new to yachting or you’ve been doing seasons for years.

What Is the Seafarers’ Earnings Deduction?

The Seafarers’ Earnings Deduction, usually just called SED, is a valuable piece of UK tax law that allows qualifying seafarers to claim a deduction against earnings from eligible seafaring employment.

For those who meet the conditions, the deduction can cover up to 100% of eligible seafaring earnings, which can result in no UK income tax being payable on those earnings.

Yachts and superyachts can qualify as ships for SED purposes, so the relief is particularly relevant to UK yacht crew.

It’s one of the more valuable tax reliefs available to seafarers, but it’s not automatic. You need to qualify for it and make the appropriate claim.

Do You Actually Qualify?

The core requirements are fairly straightforward on paper, even if the detail gets fiddly in practice.

Broadly, you need to be a qualifying seafarer working as an employee on a ship and perform employment duties wholly or partly outside the UK. You also need an eligible period of at least 365 days and must meet the relevant UK absence requirements throughout that period.
The deduction is available to qualifying UK residents and, in certain circumstances, residents of EU or EEA states.

A few groups don’t qualify, including Crown employees such as members of the Royal Navy. Oil rigs and other offshore installations are also treated differently and don’t necessarily count as ships for this particular relief.

Where it gets trickier is working out your eligible period and how your time in and outside the UK affects your claim. HMRC’s Seafarers’ Earnings Deduction helpsheet (HS205) sets out the full conditions if you want to check the detail yourself.

You don’t have to spend 365 consecutive days outside the UK. Your eligible period can include visits back to the UK, provided the qualifying conditions continue to be met.

Broadly, at least half the days in a combined eligible period need to be days of absence from the UK, and a return visit to the UK must not exceed 183 consecutive days.

One particularly important point for yacht crew is the midnight rule. For the purposes of calculating days of absence, you are generally treated as outside the UK for a particular day if you are outside the UK at midnight at the end of that day.

This is why keeping accurate records of your movements is so important.

The Mistakes Crew Actually Make

The single biggest mistake is assuming that because you’re paid gross, with no tax taken off at source, that means your earnings are automatically tax-free.

They aren’t.

Being paid gross and qualifying for SED are two different things. You still need to meet the qualifying conditions and make the appropriate claim.

The second common mistake is underestimating how important your movements are. If you’re on a yacht that spends an extended period in UK waters or in a UK shipyard, or you’re spending long periods back home between rotations, this can affect your qualifying position.

It’s also important to remember that simply being outside UK territorial waters doesn’t automatically mean that your employment qualifies. The vessel’s voyages and ports can also be relevant when determining whether your employment duties meet the SED requirements.

The third mistake is simply not keeping good records. Travel dates, time on and off the boat, vessel movements and periods spent in different countries can all matter, and trying to reconstruct a year’s worth of movements from memory at tax return time is nobody’s idea of fun.

Keep supporting evidence wherever possible, including passports and visas, flight and travel records, discharge books and details of the vessels and voyages you’ve worked on.

Worth knowing too: financial information is increasingly shared between tax authorities internationally under arrangements such as the Automatic Exchange of Information, so assuming that income earned or paid abroad simply goes unnoticed isn’t a sensible approach.

What About National Insurance?

This is the bit that catches people out even when they’ve got their income tax sorted.

The Seafarers’ Earnings Deduction relates specifically to income tax. It doesn’t cover National Insurance, which is a separate system with its own rules.

Keeping up your NI contributions while you’re working away can be important because your National Insurance record affects your entitlement to the UK State Pension and certain benefits further down the line.

It’s worth considering your National Insurance position alongside your tax each year rather than assuming SED takes care of both.

How to Actually Claim It

For UK-resident crew, claiming SED will normally involve completing a UK Self Assessment tax return and making the appropriate claim for your eligible seafaring earnings.

You also need to be able to demonstrate that you meet the qualifying conditions. That means keeping a clear and accurate record of your movements: when you were on the boat, when you were off it, when you entered and left the UK, and the relevant details of the vessels and voyages you worked on.

For a lot of crew, particularly once things like significant UK time, multiple contracts, changes of boat or periods in shipyards come into play, it’s worth speaking to a specialist seafarer’s tax adviser rather than trying to work through everything alone.

The rules aren’t impossible to understand, but small details can make a significant difference to whether you qualify.

A Quick Note, and What’s Next

We’re recruiters, not tax advisers, so think of this as a friendly starting point rather than the final word on your own situation.

For specialist advice, Marine Accounts are experts in tax for yacht crew and seafarers and can help you navigate the Seafarers’ Earnings Deduction, establish whether you qualify and deal with your UK Self Assessment tax return and SED claim.

If you’re unsure about your qualifying period, UK days, vessel movements or whether you’ve dealt with your tax correctly, it’s worth getting specialist advice rather than leaving it to chance.

If you’re at the start of your yachting career and want to understand more about your rights and contracts on board, our guide to crew employment rights and contracts under MLC 2006 is a good next read. And if you’re actively looking for your next role, register with us and we’ll keep you in mind as suitable opportunities come in. Not sure your CV is ready? Our tips for preparing your yachting CV are a good place to start.