Seafarer taxes: do you have to pay, the 183-day rule, and how to stay out of trouble

"Seafarers don't pay tax" is the phrase that gets people into trouble. The truth is more nuanced and depends on your tax residency. This is not legal advice — it is a map to help you ask your accountant the right questions.

What the tax actually depends on

The key concept is tax residency. It is usually decided by how many days per year you were physically in a country (183 days is a common threshold). A resident generally must declare worldwide income; a non-resident is taxed under special rules.

The 183-day rule

In many countries, if you spend more than a set number of days outside the country (often 183+), your status and rate change. That is why seafarers must track their days: sign-on/sign-off dates, stamps, flight tickets. Your seaman's book and tickets are your evidence.

Why "paying nothing" is a risky strategy

• Banks can ask for the source of funds on large transfers.
• Buying property or a car triggers questions about where the money came from.
• Years with no declarations invite back-taxes and penalties.
• Some countries have special (favourable) regimes for seafarers — but you must register for them properly, not just stay silent.

Practical steps

1. Learn the rules of your own country of residency — they differ everywhere.
2. Keep a personal log: days in and out of the country, contracts.
3. Save contracts, payslips and transfer statements.
4. Once a year, consult an accountant who understands seafarers.
5. If a seafarer tax regime exists, register for it officially.

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