Designed around real rules
Tracks UK vs non-UK days using the "outside the UK at midnight" approach, supporting the full qualifying-period workflow.
Built for documentation
Evidence is not an afterthought. Keep your supporting info organised from day one so you're never scrambling at claim time.
Accurate calculations
Automatically calculates your qualifying days using HMRC's UK-midnight rule, eliminating manual counting errors.
Export-ready reports
Generate HMRC-ready documentation and evidence packs the moment you reach your 365-day qualifying period.
Key Features
Built for seafarers, step by step.
Everything in easySED is designed around how seafarers actually work — on the move, often offline, and under real compliance pressure.
One tap to leave.
One tap to return.
Our state-aware dashboard knows exactly where you are. When you're ready to set sail, simply tap "Leave UK." When you return, tap "Enter UK." The app handles local midnight rules and time zones automatically, ensuring your day counts are always precise.
- One-tap Leave / Enter UK logging
- Local midnight rule applied automatically
- Time zones handled for you
Never lose a boarding pass again.
Attach photos or PDFs directly to each trip as you log them. By storing your evidence locally as you travel, you build a robust, auditable paper trail that is ready for HMRC the moment you qualify.
- Attach photos or PDFs to each trip
- Local storage for privacy and control
- Auditable paper trail as you travel
Know your status in real time.
Stay ahead of the Half-Day Rule and the 183-day visit limit. Your dashboard provides a live progress bar toward your 365-day target and alerts you instantly if a stay in the UK puts your qualifying period at risk.
- Live 0–365 day progress
- Instant risk alerts for UK stays
- UK vs. Outside UK day totals at a glance
Your Tax Vault.
Everything, ready to go.
Once you hit 365 days and return to the UK, the app automatically finalises your claim. It generates a professional HMRC-ready template and a compiled Evidence Pack. Your completed periods are safely archived in the Tax Vault, ready to be exported or shared whenever you need them.
- HMRC-ready template and Evidence Pack
- Automatic archive of completed periods
- Export or share anytime
"Will I lose my claim?"
It's the #1 question seafarers ask. Our intelligent algorithm checks your data against HMRC's strict rules. If a planned trip home will break your 365-day chain, the app will warn you before you book the flight.
Frequently Asked Questions
Common questions, straight answers.
Can I claim if I'm being taxed at source (PAYE)?
Yes. easySED tracks the tax you've paid and generates the reports you need to reclaim every penny from HMRC.
Does it handle provisional claims?
Absolutely. If you're mid-way through your first 365 days when the tax year ends, the app provides the exact data needed to file a provisional claim safely.
Is my data safe?
Privacy by Design. Your data is stored locally on your own device, not on a remote server. You have total control over your information — it stays on your phone, exactly where it belongs.
Does it work without an internet connection?
Yes. easySED is fully offline-capable. You can log trips, attach evidence and review your status at sea with no signal required.
What is the Half-Day Rule?
The Half-Day Rule determines whether a day counts as a UK day or a non-UK day based on where you are at midnight. easySED applies this automatically — you just log your movements. See our guides for a full explanation.
Who is easySED for?
Built for UK seafarers.
easySED is designed for UK seafarers who need to track their days outside the UK for Seafarers' Earnings Deduction (SED) tax relief. Whether you're working on cruise ships, cargo vessels, or offshore platforms, easySED helps you maintain accurate records and build a complete audit trail — without the spreadsheet headache.