Seafarers’ Earnings Deduction
Work at sea? You may be able to make your qualifying seafarer’s earnings free from UK income tax.
Seafarers’ Earnings Deduction — usually shortened to SED — is a tax relief that can potentially knock qualifying seafarer’s earnings out of your UK income-tax calculation.
Sounds great. And it can be. But there’s a catch: you have to meet the rules.
What do you need to qualify?
There are several conditions, but these are the big things to think about:
You need to be a seafarer
Your employment needs to fall within the rules for a qualifying seafarer.
You need to go abroad
The rules involve spending qualifying days outside the UK.
The dates matter
Your voyages, joining dates, leaving dates and qualifying period all matter.
The main conditions
This is the bit where the tax rules stop being quite so shipshape. But don’t worry — here’s the plain-English version.
Your employment and the duties you perform need to fall within the statutory definition of a seafarer.
Working somewhere in the maritime industry isn’t necessarily enough. The vessel and the nature of your duties matter.
The rules look at the days you spend outside the UK. This is one reason why accurate travel and voyage records are so useful.
Your employment and pattern of voyages need to satisfy the rules for the relevant qualifying period.
SED applies to qualifying earnings from qualifying employment. Don’t assume that every payment in your payslip automatically qualifies.
The SED voyage 🚢
Qualifying
employment
Qualifying time
outside the UK
Qualifying
period
Potential
SED claim
Keep your paperwork shipshape
Nobody likes paperwork. But when you’re claiming SED, good records can make life considerably easier.
👍 Keep hold of:
- Employment contracts
- Crew agreements
- Payslips
- Joining dates
- Leaving dates
- Voyage records
- Travel records
- Details of the vessels you’ve worked on
👀 Don’t rely on:
“I was away most of the year.”
Unfortunately, HMRC doesn’t generally accept “trust me, I was on a boat” as a substitute for proper records.
Let’s look at a simple example…
Imagine you earn:
If you satisfy all the SED conditions, your qualifying earnings may potentially be deducted when calculating your UK income-tax liability.
But £60,000 isn’t automatically tax-free just because you work at sea.
The conditions need to be checked first.
SED is one of those tax reliefs where the detail matters. Your job, vessel, voyages, dates and days outside the UK can all affect the result.
So don’t simply tick the SED box because you spend your working life looking at the horizon.
Questions we’re often asked
I work at sea. Does that mean I automatically qualify?
No. Working at sea is only part of the story. You need to satisfy the specific statutory conditions for SED.
Is SED just for cruise ship workers?
No. SED can apply to qualifying seafarers working on different types of vessels. The nature of the vessel and your employment need to be considered.
Can I claim SED on everything I earn?
Not necessarily. The relief applies to qualifying earnings from qualifying employment. Individual payments may need to be considered separately.
What records should I keep?
Keep your contract, payslips, voyage information, joining and leaving dates, travel records and information about the vessels on which you worked.
Can Nicolson Accountancy check my claim?
Yes. If you’re unsure whether you qualify, we can look at the details of your employment and voyages and explain what information is needed to consider the claim.
Think you might qualify?
You don’t need to become a tax expert before asking us.
Send us your details and we’ll help you work out whether SED is something worth looking at.
Let’s talk SED 🚢General information only. SED is subject to detailed statutory conditions and HMRC guidance. Your individual circumstances should be checked before making a claim.