Seafarers Tax Calculator

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About Seafarers Tax Calculator

Know exactly where you stand with your Seafarers Earnings Deduction (SED).

Track your qualifying days, days in hand, and fail date in real time — no spreadsheets, no guesswork.

Built by an offshore worker, for offshore workers.

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WHY THIS APP EXISTS

Most seafarers don’t realise how close they are to failing their SED claim until it’s too late.

Miss the 183-day rule — and you could lose thousands.

This app shows you exactly where you stand, every day.

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KEY FEATURES

• Track voyages, holidays, and qualifying days
• See your Days In Hand (DIH) at a glance
• Know your projected fail date before it’s a problem
• Export reports for your accountant (CSV & PDF)
• Store your documents securely (premium)
• Works fully offline — no signal required offshore

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BUILT FOR REAL OFFSHORE LIFE

No WiFi? No problem.

Designed to work offshore, on vessels, and on rotation — not just in an office.

Fast, simple, and reliable when you need it most.

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STOP GUESSING YOUR TAX POSITION

No more spreadsheets

No more last-minute panic

No more uncertainty

Just clear, accurate tracking of your SED status.

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Download now and take control of your Seafarers Earnings Deduction.

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Frequently Asked Questions