Your Day Rate Is Lying: $700/Day Is Not $21,000 a Month

$700 a day is not $21,000 a month. It is $700 on the days you are on hire — and $700 is a number people quote, not the number most ABs, third officers or DPOs actually sign. Work an equal-time rotation — about 182 days — and even that quoted rate is $127,400 gross for the year, about $10,600 a month if you spread it across the twelve months you live. Only if every one of those days was sold.

A contract people do sign looks smaller. Permanent $4,000 a month, paid at home as well as at sea, is $48,000 for the year. The day rate that matches it on 182 sea days is about $265. That is the “double” trick: $4,000 ÷ 30 × 2. A quoted $450 day is not three times a monthly wage. At 182 days it is $81,900.

This is the comparison that matters: marine crew on a monthly contract versus project crew on a day rate — container and LNG against AHTS, SOV and DSV — and what tax actually takes in the UK, Norway, Australia, the US and French waters. Not a slogan about “international waters.” The statutes.

Why a Day Rate Looks Like Double

Permanent sea contracts are rare. Most officers are still employees, but the paycheck follows the ship. Two patterns dominate:

• Monthly employment — common on liners and LNG. You are paid every month, including leave at home. The number on the contract is already a year divided by twelve.
• Day rate / freelance project crew — wind, survey, diving, MMO, a lot of oil-and-gas construction. You are paid for days on hire. Travel days, bad weather and the months with no ship are zero.

Rule of thumb when the rotation is about 1:1 and the day-rate person is only paid at sea: a day rate that “feels” like double the permanent monthly wage is often the same annual money.

$21,000 would be $700 × 30. You do not work 30 paid days every month on a trip system. Divide by two before you compare it with an LNG wage that arrives in January as well as in July.

Same Rank, Five Hulls

These are typical gross bands crews use to compare a liner wage with an offshore day rate. They are not offers. Container and LNG figures are per month, paid through the year. AHTS, SOV and DSV figures are per day on hire.

These are ordinary international-manning bands, not a Norwegian senior specialist or a US Gulf toolpusher. Read one line properly. A Chief Officer on LNG at $8,000 × 12 = $96,000 a year, paid in port and on leave. The same rank on a DSV at $400/day × 182 days = $72,800 if the rotation is full and the day rate is mid-band — and $0 on the days the company does not call. The LNG job can win a quiet year. The DSV job wins a busy one. Neither number is net.

More on why the hull beats the title: vessel type and pay and the salary guide.

There Is No Minimum Day Rate Until You Know the Deal

Crewing gets the same question every week: what is the minimum day rate an AB, a third officer or a DPO should accept? The rate on its own does not answer it. A lower number on a rotation that actually repeats, paid at home, with tax already settled, can beat a higher number for one trip.

Before you agree to less than the band above, get five things in writing:

• Gross or net. €250 a day from an umbrella is often the assignment rate. €250 net from a shipowner is a different contract.
• Who pays the tax. You, the employer, or an umbrella that takes employer National Insurance out of the rate before you see “gross.”
• Rotation or one-off. Equal time all year — 14/14, 28/28, 2/2 — or one campaign and then silence until spring.
• Which days are paid. Days on hire only, or also travel, weather standby and leave.
• What “permanent” means. Paid every month for years, or permanent until this project ends. The second one is a one-off with a nicer word.

A rate under the band is not automatically a bad job. It is a bad job if you accepted it before those answers. Do not drop the number just because the agency says two hundred people are waiting.

Marine Crew and Project Crew Are Not the Same Market

A permanent contract — paid every month for years, not one trip — is the exception. Treat any advert that says “permanent” as a question: paid on leave, or permanent until the project ends?

High Day Rate, Then Nobody Calls

Project crew day rates are high because the year is short. North Sea and Baltic wind, survey and mammal work pile into spring and summer. From autumn into winter the same people compete for what is left.

MMO/PAM is the clearest example: a day rate often in the $150–400 band, with some PAM seats higher, then a single winter mobilisation with on the order of 200–300 people chasing one seat. Survey, UXO identification and junior wind technician calls do the same thing. A $350 day does not pay the mortgage in November if November has no purchase order.

That is why a lower LNG monthly wage can be the richer life: it arrives when the weather is useless. If you take project money, price the empty months first. Related: MMO / PAM and why offshore money disappears on leave.

International Waters Do Not Switch Tax Off

Working outside the 12-mile line does not, by itself, make you tax-free. Two questions are separate:

1. Where are you resident? Residents of the UK, Norway, Australia and most of Europe are taxed on worldwide employment income unless a specific relief applies. US citizens are taxed on worldwide income even when they live somewhere else.
2. Where was the work done? Territorial waters, a continental shelf (oil, gas, and in several countries offshore wind), and the flag of the ship can give that country a taxing right even if you sleep in another state.

If you are not tax-resident in a country, you generally do not owe that country tax on work performed entirely outside its tax net. That is ordinary residence law, not a trick. The mistake is assuming a rotation makes you non-resident. It often does not.

United Kingdom — SED, Frontier Workers, PAYE and Umbrella

Seafarers’ Earnings Deduction is a statute, not a rumour

UK and EEA residents who are employees on a ship, with duties outside the UK, can claim Seafarers’ Earnings Deduction under ITEPA 2003, Part 5, Chapter 6. HMRC’s public page is Seafarers’ Earnings Deduction. The working sheet is HS205.

The test, in short:

• An eligible period of at least 365 days.
• Built mainly of days you are outside the UK at midnight. A departure day usually counts; the day you return usually does not.
• A return to the UK counts only if no single return lasts more than 183 consecutive days, and days in the UK are not more than half the total period.
• You claim it on a Self Assessment return (UK resident) or on form R43M(SED) if you are an EEA resident who is not UK resident.
• After a successful claim, and with a long enough contract, HMRC may issue an NT code so PAYE stops deducting income tax. If the claim later fails, the tax is due in one sum. NT is not automatic on day one.

SED does not wipe National Insurance. It is an income-tax deduction. And it applies to work on a ship. ITEPA 2003 s.385 says an offshore installation is not a ship. HS205 names the usual ones: fixed platforms, FPSOs, jack-ups, semi-submersibles, flotels — anywhere in the world, including while the unit is moving between locations. Standing on a turbine is not work on a ship either. An SOV that actually navigates can be a ship. That is a different question from whether the days count.

There are two clocks, and people mix them up. HMRC sets both out in EIM33032 and EIM33033:

• Day of absence (the 365-day test). Midnight in a UK oil-and-gas designated area can still be a day outside the UK. Section 378(4) does not import the shelf deeming in s.41.
• Where the duties were performed (whether the earnings qualify). For that test the UK sector of the North Sea counts as the UK (s.382). A voyage that begins and ends inside that sector is not “duties outside the UK.” HS205 says the same thing in one sentence.

So a full year of midnights outside the 12-mile line can still produce no deduction if you were on an installation, or if the ship never left the UK sector. “Neutral water” is not the statute. Oil-and-gas shelf workers are also pulled into PAYE by ITEPA s.689A (Finance Act 2014). UK wind and short-term oil-and-gas hands are, in the market, put on PAYE through an umbrella — that mechanism is below.

Frontier Worker Permit is an immigration document

The Frontier Worker Permit lets certain EU, EEA and Swiss citizens who live outside the UK and were frontier working before the end of 2020 keep coming in to work. It does not exempt the UK duties from UK tax. If the work is in the UK or on the UK shelf, expect UK tax unless SED or a treaty article actually fits. Our longer note: UK Frontier Worker Permit guide.

What £48,000 of taxable pay leaves

Illustration only, England and Northern Ireland, 2025/26, employment income of £48,000 — a believable taxable year, not a fantasy wage. Personal allowance £12,570, no pension salary sacrifice, no student loan. Scotland has different bands. The 40% band starts at £50,270, so this example stays at 20%.

• Income tax: £35,430 at 20% — £7,086.
• Employee National Insurance: 8% from £12,570 to £48,000 — £2,834.
• About £38,080 left before pension. About 21% has gone. Cross £50,270 and the next slice is taxed at 40%, with employee NI dropping to 2% above that line.

If SED covers the seafaring pay, UK income tax on that pay can fall to nothing. NI, and any pay that is not seafarer earnings on a ship, stay in the calculation. A non-UK resident who is also not EEA resident cannot claim SED. They may still owe UK tax on UK-source work, and they use a different repayment form (R43M) only where UK tax was taken and should not have been.

PAYE and umbrella — how wind and oil-and-gas day rates are actually paid

A large share of UK wind technicians, riggers and short-term oil-and-gas hands are not paid by the operator. The chain is: client → recruitment agency → umbrella company → you.

HMRC describes it here: Working through an umbrella company. The agency finds the job. The umbrella employs you and runs PAYE. You are an employee of the umbrella, not a freelancer with a limited company, for that assignment.

The day rate in the advert is usually the assignment rate the agency pays the umbrella. Before your taxable gross, the umbrella typically takes:

• its own margin
• employer National Insurance (that is not the NI you see as an employee)
• apprenticeship levy, where it applies
• holiday pay accrual, unless it is rolled up on top in a way the contract actually explains

Then income tax and employee NI come off what remains. A quoted £280/day is not £280 in the bank. On a typical umbrella illustration, about 55–70% of the assignment rate reaches you, so this day is often closer to £155–£195, and less if you are a higher-rate taxpayer. Read the reconciliation statement, not the WhatsApp rate.

If a client says the role is “inside IR35”, they usually mean they will not take you through your own company. The umbrella job itself is just employment. HMRC’s line is that the off-payroll rules are unlikely to apply to the umbrella employment, because you are already on PAYE. Offers of “80–90% take-home” via loans or offshore schemes are avoidance. People lose those arguments.

Norway — Inside the System, You Pay

Skatteetaten is blunt. If you are not tax-resident in Norway but you work in connection with petroleum on the Norwegian continental shelf, that pay is taxable in Norway under the petroleum tax rules. The same direction of travel now covers renewable energy, minerals, aquaculture and carbon management on the shelf or in the economic zone. Start here: continental shelf workers resident abroad.

• You need a tax deduction card. Without one, the employer withholds 50%.
• Foreign employees who are not Norwegian tax residents can claim the standard deduction: 10% of gross employment income, maximum NOK 40,000. Taking it switches off several other deductions.
• A tax treaty can limit Norway. Do not assume it does. Shelf articles in treaties are specific, and the Supreme Court has read some of them as starting at the coast, not at 12 miles.

Ship’s crew are a different chapter: seafarers resident abroad.

• Work on a Norwegian-registered ship is generally taxable in Norway even if you live abroad.
• Exception that people actually use: if you live outside the Nordic region and serve on a ship in the Norwegian International Ship Register (NIS), Norway does not tax that wage.
• That exception does not cover petroleum work on the shelf. Those people are shelf workers, not “NIS seafarers,” and they need the deduction card.

If you are taxed as a seafarer and you have at least 130 days on a ship in service in the income year, the seafarer’s allowance is 30% of salary, capped at NOK 86,300. Supply, anchor-handling, seismic and construction vessels can count. A unit doing exploration drilling, extraction, or sitting as a flotel generally does not. An EEA citizen who should stay in the home social-security system asks that state to send an A1 to NAV; that is about Norwegian national insurance, not about wiping income tax.

So “inside Norway” — petroleum on the shelf, or a NOR-flag ship — means Norwegian tax. A person who lives outside the Nordic region and serves on an NIS ship is the case Skatteetaten states is not taxed in Norway. A ROV tech on a construction vessel in a petroleum job beside a Norwegian platform is a shelf worker, not that NIS case. From the 2025 income year, skatteloven § 2-3 also creates limited tax liability for some renewable-energy, mineral, aquaculture and carbon-management activity on the shelf and in the economic zone. A Norwegian-zone wind job is not automatically the NIS exception. Ask whether a deduction card is required before you price the day rate as net.

Poland, the Netherlands, India, Latvia

Same wage, four different bills. The examples use a modest officer figure — about $4,000 a month while paid, not a $12,000 LNG chief — so the tax rule is visible without a fantasy salary.

Poland — EU flag can be zero PIT; Panama flag is a different form

A Polish tax resident is taxed on worldwide income. The seafarer exemption is art. 21 ust. 1 pkt 23c of the PIT Act. As the consolidated text stands, it covers income of an EU or EEA citizen from work on an EU or EEA flag ship used to carry cargo or passengers in international navigation, if that work totals at least 183 days in the tax year. The shipowner’s certificate is the evidence. Tugs and dredgers qualify only if more than half their working time that year was actually sea carriage.

On that contract, Polish income tax on the sea wage is nil. It does not cancel ZUS. A Polish employer still runs social security. A foreign shipowner usually does not.

A Panama, Liberia or Marshall Islands flag — the flag on a large share of manning contracts — is not this exemption. The resident still files. Art. 27g (ulga abolicyjna) then matters: for most foreign income the relief is capped at PLN 1,360. For seafarers’ income from work outside the land territory of countries, that cap does not apply. It is a deduction on the return, not a reason to skip the return.

A statute of 17 July 2026 (Dz.U. 2026 poz. 1079) rewrites 23c: it drops the 183-day test and the citizenship limit, and it adds deep-sea rescue, pipe-lay, construction and service of offshore installations, cable ships, research ships and floating cranes. Art. 7 of that act says the PIT changes apply to income from 1 January of the year after the European Commission approves the state aid. Until that date, file on the 183-day text, not on the press version.

Netherlands — 40% is the employer’s remittance, not your exemption

There is no Dutch personal allowance called “seafarers’ earnings deduction.” What exists is the afdrachtvermindering zeevaart in art. 17 of the Wet vermindering afdracht. The employer reduces the payroll tax and national-insurance premiums it pays over to the Belastingdienst:

• 40% of the wage, if the seafarer lives in the Netherlands, the EU or the EEA;
• 10% if the seafarer lives elsewhere but is still in Dutch wage tax or national insurance.

The cut cannot go below zero. On a Dutch-flag ship in international sea transport, 40% of a mid officer wage is often enough that little or no Dutch wage tax is remitted. The employee does not claim this on a private return. The ship has to be a zeeschip mostly used at sea for that transport, or for exploration and exploitation of natural resources — the Belastingdienst knowledge group treats wind and water energy as included. Cable-layers, pipe-layers, research ships and crane ships are not a zeeschip for this reduction.

Work in the Dutch Noordzeewinningsgebied — territorial sea plus the Dutch North Sea shelf — for a continuous 30 days can be Dutch-source employment even when you are outside the 12-mile line. A resident who works the whole year for a foreign employer outside the Netherlands still has a Dutch residence question. The 40% does not answer it.

India — 182 days, the CDC, and the NRE account

India taxes residents on worldwide income and non-residents on Indian-source income. For an Indian citizen who leaves as crew, or for employment abroad, the short 60-day residence limb is replaced by 182 days (section 6 of the Income-tax Act, 1961). The year is the financial year, 1 April to 31 March, not the calendar year.

Days on an eligible voyage are counted from the Continuous Discharge Certificate: join date to sign-off date. An eligible voyage is an international passenger or freight voyage with one end in an Indian port and the other outside India. Coastal India-to-India days are not carved out. Stay in India for 182 days or more and you are resident; the sea salary is in the Indian return.

Example. Seven months on a foreign-going ship, CDC dates covering the voyage, fewer than 182 days in India in that financial year. You are a non-resident. Salary for services outside India on a foreign-going ship — Indian flag or foreign flag — is not taxed in India merely because it was paid into an NRE account. That is CBDT Circular 13/2017, corrected by Circular 17/2017 so that it says “foreign going ship,” not only a foreign flag. Four months at sea and the rest of the year at home in Mumbai can flip you to resident. The NRE account does not fix that.

Latvia — tax is charged on a slice, not on the wage

A Latvian resident on a ship used for international transport is not taxed on the full salary. The salary-tax base for a month on that ship is capped at a multiple of the minimum wage (Finance Ministry: special tax regimes):

• Officers: 2.5 × the monthly minimum. In 2026 the minimum is €780, so the base is €1,950.
• Other crew: 1.5 ×, so €1,170.

Personal income tax on that base is 25.5% up to €105,300 of annual taxable income, then 33%. An officer’s month on the ship is therefore about €1,950 × 25.5% ≈ €497 of income tax before the non-taxable minimum, whether the contract said €3,000 or €6,000. Six months on hire is six of those slices, not 25.5% of the year’s gross. Ratings are about €1,170 × 25.5% ≈ €298 a month on board.

A foreign employer who does not withhold Latvian tax leaves the seafarer to file with VID, on annex D2¹, generally by 1 June. Social insurance is a separate charge. The cap is the income-tax base, not a promise that VSAOI is calculated the same way. Leave pay is not automatically inside the cap just because the rotation includes leave — that is a question VID has already been asked, and the answer follows the month the person was employed on the international-transport ship.

Australia and the United States

Australia

If you are an Australian tax resident, worldwide employment income is taxable. Living on a rig or a ship, with a home still in Perth or Melbourne, does not usually make the rig your permanent home. The ATO’s long-standing view is in IT 2650: barracks, ships and oil rigs are weak evidence that you have left Australia for good. Courts have held FIFO-style workers taxable as residents.

If you are a foreign resident, you are taxed on Australian-source income and you do not get the tax-free threshold (ATO: foreign and temporary residents). Work on an Australian offshore project is the sort of income that stays in that net. Foreign-resident rates start from the first dollar — the headline bracket has been 30% up to the first threshold, then higher. Budget a third, then check the year you worked.

United States

US citizens and green-card holders are taxed on worldwide income no matter which flag is on the stern. The legal relief is the Foreign Earned Income Exclusion (and, separately, the foreign housing exclusion), claimed on Form 2555. The IRS cap is $130,000 for 2025 and $132,900 for 2026 (IRS: figuring the exclusion). Two tests, and you need a tax home outside the United States as well:

• Physical presence: 330 full days in a 12-month period outside the US.
• Bona fide residence: you are a resident of a foreign country for a full tax year.

A US mariner with a house, family and driver’s licence in Texas often fails the tax-home test even after a long trip. Days on a ship in international waters can count as days outside the US for the 330-day test, but only if the rest of the test is met. Above the cap, US tax still applies. This is not “Americans on ships pay nothing.”

France, Territorial Waters, and the A1

An A1 (Portable Document A1) is a social security certificate. It says which country’s system you stay in. It is not an income-tax clearance and it is not a French work visa.

The rule is in Regulation (EC) 883/2004:

• Article 11(4) — a person employed on board a vessel under an EU/EEA/Swiss flag is, as a starting point, subject to the flag state’s social security. If you live in the same country as your employer, you stay in that country’s system and you carry an A1 to prove it. The French international register explains this for RIF ships: RIF social security note.
• Article 12 — a posted worker stays in the sending country’s system for up to 24 months. The employer applies before you travel, to the institution that already covers you (in France’s counterpart role, Urssaf sees inbound postings; your own country issues the A1). Your Europe’s page: posted workers.

Who can get one. Someone already insured in an EU/EEA or Swiss system, posted by an employer established there, or serving under the flag rule above. Third-country nationals can fall inside the coordination rules when they are legally resident and insured in a member state. You do not “buy” an A1 in France on arrival. If there is no sending-country insurance, there is nothing to certify.

Why French wind jobs ask for it. Work in French territorial waters — turbines, cables, construction — can pull people into French labour and social-security control even when the vessel is not French. Clients and manning agents ask for the A1 so they can show you are not an undeclared posting. Non-seafarers on the platform side may also need a French SIPSI posting declaration. Seafarers embarked on a ship are not the same legal box as a technician standing on a foundation; the A1 question still comes up in both. No A1, no mobilisation, is a commercial rule on top of the regulation.

The UK is no longer in that regulation. A UK worker posted into the EU uses the social security protocol and an A1 issued through HMRC, where the protocol applies. It is a different form path from a Polish ZUS or a Dutch SVB certificate. Do not turn up in Saint-Nazaire with a UK NI number and call it an A1.

Count the Days Before You Argue With the Tax Office

CrewBase Seafarer Tools includes Tax Residency — a 183-day home-days calculator. You log contracts. It counts days at home in a rolling 365. Several countries use a day-count like that as one residence test.

It is not a net-pay calculator, not an HMRC SED worksheet, and not a ruling. The screen says so. Use it to see whether a rotation is even in the conversation — half the year at home is 182 days, sitting on the line many states care about — then take the diary to an adviser who knows your passport.

A Year, Gross and Net, Side by Side

FAQ

Is a day rate double a permanent salary?

Only as a comparison trick. If you are paid only at sea on a 1:1 rotation, a day rate of about twice the permanent monthly wage divided by 30 matches the permanent annual pay. About $265/day against $4,000/month is that pair. $700/day is a quoted peak — if you actually work the days.

Do I pay tax if I am not resident?

Not to the country where you are not resident, on income that country does not claim as source. You still pay the country where you are resident, and any country that taxes the shelf, the territorial sea or the flag. US citizens pay the US either way.

Does the UK 183-day story cancel tax?

No. SED needs 365 days built mostly outside the UK, on a ship, and you must be UK or EEA resident to claim it. Spending 183 days in the UK can break the claim. It is the opposite of a free pass.

Why do French jobs demand an A1 from Europeans?

To prove which social security system covers you while you work in French waters or as a posted worker. Your employer requests it from your home institution before you join. It does not replace a contract, a visa, or income tax.

Are project crew freelancers?

Often in conversation. In the UK wind and oil-and-gas market they are frequently employees of an umbrella on PAYE. Freelance should mean you invoice and carry your own tax. If someone else runs PAYE, you are employed.

The Bottom Line

1. Divide a day rate by the days you will actually sell. $700 × 182 = $127,400, not $252,000 — and $700 is the quote, not the typical signature.
2. On a 1:1 trip, day rate ≈ double the monthly figure ÷ 30 before it is the same year. $4,000 a month lines up with about $265 a day, not with $700.
3. Project crew — wind, survey, oil and gas — eat the winter. Two or three hundred people on one MMO seat is normal when the weather stops.
4. Tax follows residence, shelf and flag. UK SED, Norwegian NIS, and the US exclusion are written tests. Neutral water is not one of them.
5. UK day-rate wind and rig work is usually PAYE through an umbrella. The advert rate is not the payslip.
6. French A1 is social security, applied for at home, before you fly.

Log the trips in CrewBase Tax Residency before you promise yourself a net figure. Then read the contract: monthly or day rate, paid on leave or not, umbrella or shipowner. The gross number is the advert. The net number is the law.