An app built specifically for UK seafarers navigating HMRC’s SED rules.
No sign-up required100% Offline100% Local storage
First year free — no card needed. Then £20/year.
Your dashboard, live
Your SED status at a glance.
easySED checks your logged days against the SED day-count tests as you log a trip, and shows you in plain English where you stand.
Example status. Your own dates update automatically as you log trips.
The records and figures you need to prepare and support a claim, in one place.
Attach evidence the moment it happens.
Photograph your boarding pass, discharge book entry or payslip and attach it directly to the trip. Your copies stay organised trip by trip, alongside the originals you keep.
Your records, organised and ready to review.
Once you qualify, easySED compiles your day counts, trip log and attached evidence into a single export — ready to go through with your accountant, and to help support your records if HMRC asks.
easySED is a digital record-keeping aid designed to support your records — it doesn’t replace them. Keep the originals of all primary evidence (boarding passes, discharge book entries, payslips and crew agreements), and use a qualified tax professional or accountant to submit your official claim.
Check your safe UK return date before paying for flights home.
Add a planned UK stay and easySED warns you if, based on the trips you’ve logged, it could put your qualifying period at risk. It’s the question every seafarer asks — answered before you book.
Download easySED free and see where you stand from your first trip.
£0every feature
Every feature, free for a full year from the day you first open EasySED. No card needed. Nothing charged automatically.
£20/ year
Less than £1.70 per month. A successful SED claim can save thousands. EasySED Pro keeps every feature running with no interruption.
Paid annually through your App Store or Google Play account. Renews automatically — cancel any time in your device settings. Prices include VAT. EasySED is a record-keeping tool, not tax advice, and can’t guarantee your claim will be accepted.
SED is a UK tax relief that lets eligible seafarers deduct 100% of their seafaring earnings from their taxable income — meaning you pay no income tax on money earned at sea. You need to spend at least 365 days in a qualifying period mostly outside the UK.
EasySED checks the three day-count tests: the 183-day rule, the half-day rule and the foreign port rule, and updates them every time you log a trip. It can’t check other conditions, such as whether your vessel counts as a ship for SED or whether you’re resident, so read our guide to who qualifies or ask a tax adviser.
Yes — EasySED is fully offline. Log trips, attach evidence and check your status at sea with no signal at all. Your data stays on your device unless you choose to share or export it.
Yes. Everything is stored locally on your phone. EasySED never sends your trip data or evidence to any server. Because it’s only on your phone, keep a backup in case your phone is lost or replaced.
Yes, if you meet the SED conditions you can reclaim PAYE tax through Self Assessment. easySED organises the day counts and evidence copies that support a PAYE seafarer tax reclaim, and the records you’ll want when you apply for an NT (No Tax) code. Your accountant or tax adviser should check them and submit the claim.
You’ll get a reminder before it ends. If you don’t subscribe, your trips and evidence stay on your phone — nothing is deleted and nothing is charged automatically.