--- title: "Seafarers Tax Calculator - Reviews, Revenue and Downloads in United Kingdom | Apple App Store" description: "Seafarers Tax Calculator – Know Your SED Position Know exactly where you stand with your Seafarers Earnings Deduction (SED) — before it’s too late. Track your voyages, calculate your qualifying days, " --- # Seafarers Tax Calculator — United Kingdom > Track Sea Days for SED Claims ![Seafarers Tax Calculator App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/34/29/45/34294579-9a61-4cef-cbae-e941ebdcb780/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [william cardno](https://apptail.io/developer/william-cardno-ETKTIb) **Category:** Finance **Rating:** 3.3/5 (3 ratings) **Price:** Free **Bundle ID:** com.seataxcalc.ios **Store:** Apple App Store **Country:** United Kingdom **Version:** 1.0.129 (released 2026-07-28) **Original Release:** 2026-03-10 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/gb/app/app/id6758364410) **AppTail Page:** [https://apptail.io/app/seafarers-tax-calculator-rLQy/united-kingdom](https://apptail.io/app/seafarers-tax-calculator-rLQy/united-kingdom) ## Seafarers Tax Calculator Description Seafarers Tax Calculator – Know Your SED Position Know exactly where you stand with your Seafarers Earnings Deduction (SED) — before it’s too late. Track your voyages, calculate your qualifying days, and see your Days in Hand (DIH) and fail date in real time. Built offshore, for offshore workers. Why this matters Most seafarers don’t realise they’re short on days until the end of the tax year. By then… it’s too late. This app shows you: How many qualifying days you have How close you are to failing The exact date your claim could fall short No spreadsheets. No guesswork. Key Features SED Tracking Made Simple Log voyages and holidays in seconds Automatic qualifying day calculation Works fully offline (perfect offshore) Days in Hand (DIH) See how much buffer you have Know instantly if you’re close to the edge Fail Date Prediction See the exact date your claim could fail Stay ahead instead of reacting too late HMRC-Ready Records Keep a clear log of your trips Export CSV and PDF reports for accountants or HMRC Smart Reminders Get alerts before your fail date Stay in control of your claim all year round Document Storage Store discharge books, payslips, and records Keep everything in one place when it matters Built for Offshore Reality Works without signal or WiFi No login required No complicated setup Designed for real offshore rotations Who it’s for Offshore workers Seafarers claiming SED Wind, oil & gas, marine crews Anyone needing to track qualifying days accurately Simple but powerful This isn’t about features. It’s about one thing: Knowing your position before you submit your claim. Premium Features Upgrade to unlock: Days in Hand (DIH) Fail Date tracking Export reports Smart alerts Extra document storage Final word If this app helps you avoid losing your SED claim… it’s already paid for itself. Disclaimer The app is designed as a practical tracking tool and does not replace professional tax advice. Terms of Use (EULA) ## Seafarers Tax Calculator Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/2c/91/b9/2c91b96f-f77b-6686-0294-309c02b559a0/Documents.jpg/1242x2688.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/50/fb/7e/50fb7e66-fbf2-a40f-4b07-8c11d4ee47b0/Downloads.jpg/1242x2688.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/fc/2b/81/fc2b8125-a49a-079d-15ed-eddc90361956/home.jpg/1242x2688.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/f7/59/b0/f759b06b-0da8-86c1-15fb-4f313d09f4be/Settings.jpg/1242x2688.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/8e/d5/3b/8ed53b4b-ca8d-400b-0193-db91b16d7c35/Summary.jpg/1242x2688.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/df/db/00/dfdb0078-325a-4cfc-0286-94d8125e3bde/Voyages.jpg/1242x2688.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/6b/92/48/6b924830-1ea3-7c82-9478-a6f26369292e/Years.jpg/1242x2688.png) ## Seafarers Tax Calculator Rating Breakdown in United Kingdom - 5 stars: 1 (33%) - 4 stars: 0 (0%) - 3 stars: 1 (33%) - 2 stars: 1 (33%) - 1 stars: 0 (0%) ## Seafarers Tax Calculator Reviews in United Kingdom ### **--- "Expensive for all the features" Expensive app for what it does can save you money but better apps out there that do more. -- kevrov, 2026-06-04 ### ***** "Great app" Great and easy to navigate, worth paying the premium! -- Robmcint, 2026-03-30 ### ***** "A must have!" Brilliant app, a must have for UK seafarers, exports easily to PDF or CSV. Accurate and unlike other apps, tells you your predicted fail date so you can plan ahead. Full support from the creator also. -- Archie074, 2026-03-13 [View all Seafarers Tax Calculator reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Seafarers Tax Calculator In-App Purchases | Item | Price | |------|-------| | Premium Monthly | £2.99 | | Premium Yearly | £24.99 | ## Apps Similar to Seafarers Tax Calculator - [UK Tax Tool 2026](https://apptail.io/app/uk-tax-tool-2026-Iib/united-kingdom) - [World Kite Residency Tracker](https://apptail.io/app/world-kite-residency-tracker-vKv/united-kingdom) - [Well One Money](https://apptail.io/app/well-one-money-PwY/united-kingdom) - [JCWealth](https://apptail.io/app/jcwealth-Cnqg/united-kingdom) - [Friday Financial](https://apptail.io/app/friday-financial-zWwu/united-kingdom) - [HMRC UK Tax Tools & Guide 2025](https://apptail.io/app/hmrc-uk-tax-tools-guide-2025-HWCv/united-kingdom) - [MyAcumenFP](https://apptail.io/app/myacumenfp-CSOv/united-kingdom) - [UK Tax Calculator 25/26](https://apptail.io/app/uk-tax-calculator-2526-QOCy/united-kingdom) - [UK Tax Calculator 26/27](https://apptail.io/app/uk-tax-calculator-2627-QnQy/united-kingdom) - [Money in Motion](https://apptail.io/app/money-in-motion-Isvz/united-kingdom) ## Seafarers Tax Calculator Available In - [United Kingdom](https://apptail.io/app/seafarers-tax-calculator-rLQy/united-kingdom) - [Poland](https://apptail.io/app/seafarers-tax-calculator-rLQy/poland) - [Romania](https://apptail.io/app/seafarers-tax-calculator-rLQy/romania) - [Russia](https://apptail.io/app/seafarers-tax-calculator-rLQy/russia) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. 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