Marine engineer salaries in the UK for 2026/27 range from around GBP 20,000 for a cadet in training to GBP 100,000 or more for a Chief Engineer on specialist vessels. What makes marine engineer take-home pay unusual is Seafarers Earnings Deduction (SED), a tax relief that can remove UK income tax entirely from qualifying seagoing earnings. This guide covers both standard PAYE take-home pay and how SED changes the picture for seafarers who meet the qualifying conditions.
Figures assume 2026/27 income tax and National Insurance rates and the standard personal allowance of GBP 12,570, with no Seafarers Earnings Deduction applied. Marine engineers who qualify for SED on seagoing earnings pay no UK income tax on that income -- see the SED section below.
| Rank / Level | Typical Gross / Year | Est. Take-Home / Year | Est. Take-Home / Month |
|---|---|---|---|
| Cadet | ~GBP 20,000 | ~GBP 17,920 | ~GBP 1,493 |
| Third Engineer Officer | ~GBP 42,000 | ~GBP 33,760 | ~GBP 2,813 |
| Second Engineer Officer | ~GBP 55,000 | ~GBP 42,457 | ~GBP 3,538 |
| Chief Engineer | ~GBP 85,000 | ~GBP 59,857 | ~GBP 4,988 |
Figures shown assume standard PAYE tax treatment with no Seafarers Earnings Deduction. Seafarers who qualify for SED on their seagoing earnings can significantly increase their net take-home by removing the UK income tax element -- National Insurance may still apply.
Taxable income above personal allowance: GBP 42,430. Income tax: 20% on GBP 37,700 (GBP 7,540) plus 40% on GBP 4,730 (GBP 1,892) = GBP 9,432 total tax. Employee NI: 8% on GBP 37,700 (GBP 3,016) plus 2% on GBP 4,730 (GBP 95) = GBP 3,111 total NI. Net take-home: GBP 55,000 - GBP 9,432 - GBP 3,111 = approximately GBP 42,457 per year or GBP 3,538 per month.
Seafarers Earnings Deduction is a 100% income tax relief available to UK-resident seafarers, including marine engineers, who work on a ship, have at least one qualifying voyage beginning or ending at a foreign port, and spend at least 183 days outside the UK during a 365-day qualifying period (with limits on the proportion of days spent back in the UK). A Second Engineer earning GBP 55,000 who fully qualifies for SED pays no UK income tax on that seagoing income, though Class 1 employee National Insurance may still be deducted depending on the employer and residency arrangements. This can make SED-qualifying seagoing roles considerably more tax-efficient than equivalent shore-based engineering roles on the same gross salary.
SED does not apply to marine engineers working shore-based roles, such as ship surveying, naval architecture, or offshore renewables project engineering, who are taxed under standard PAYE or self-employment rules like any other UK employee.
Marine engineers who are Scottish taxpayers and do not qualify for Seafarers Earnings Deduction pay income tax under the Scottish bands rather than the rUK bands shown above -- including a 21% intermediate rate from GBP 16,956 to GBP 31,092 (taxable) and a 42% higher rate from GBP 31,092 to GBP 62,430. Seafarers claiming full SED relief on qualifying seagoing income pay no UK income tax regardless of Scottish or rUK residency status, since SED removes the income tax liability entirely on that income.
