Yes, seafarers can get a mortgage in the UK, subject to lender criteria. The job itself is rarely the problem. What trips applications up is how seafarer income looks on paper: no tax deducted because of the Seafarers' Earnings Deduction, an NT tax code, pay from an overseas employer or in another currency, and long spells away from home. Choose a lender that understands those things and your application can be assessed much like anyone else's.
Key takeaway: Many lenders and advisers are simply not used to seafarer income, which is why so many seafarers are told "no" when the honest answer is "not with that lender". Lenders that do accept it generally use your gross pay, want proof of how your tax is handled, and expect your home to be in the UK when you are not at sea.
Can seafarers get a mortgage in the UK?
You may well be able to. Merchant navy officers and ratings, cruise ship crew, superyacht crew and others who work at sea get mortgages every year. The difference is that fewer lenders are set up to assess this kind of income, and an application sent to the wrong one can be declined even when your earnings are strong and steady.
That is the most common story seafarers tell: a local adviser or the bank they have always used says no, and they assume the problem is them. Usually it is the fit between the income and the lender. Getting that fit right first is the main job of a mortgage broker at Quanstrom Financial on a seafarer case.
Does the Seafarers' Earnings Deduction affect your mortgage?
The Seafarers' Earnings Deduction (SED) is an HMRC relief that can remove income tax on your seafaring earnings if you meet its conditions. In short, according to HMRC's guidance you must be an employee working on a ship, resident in the UK (or for tax purposes in another EEA state), and build up an eligible period of at least 365 days made up mainly of days outside the UK. You claim it through a Self Assessment tax return.
For a mortgage, SED matters in two ways:
- It does not usually raise what you can borrow. Lenders generally base borrowing on your gross pay, the same as anyone else, so paying no tax does not normally increase the figure. What it can do is leave more of your monthly income free, which helps when a lender looks at your outgoings.
- It changes the evidence a lender wants. Because tax is not taken at source, your payslips alone do not tell the full story. Lenders that accept SED income usually want your tax returns as well. NatWest, for example, asks for payslips plus your latest SA302 where tax is not paid at source.
Good to know: Not everyone who works at sea can claim SED. HMRC excludes Crown employees, such as Royal Navy personnel, and does not treat offshore installations, including fixed and floating production platforms, FPSOs, mobile drilling units and flotels, as ships. Work in the UK sector of the North Sea also counts as being in the UK. If SED does not apply to you, lenders will usually assess your pay much like any other employed income.
Why your first year on SED is the hardest time to apply
A lender that wants an SA302 cannot have one until you have filed a tax return covering your SED claim. In your first year, that means you may have a year of strong payslips and no tax calculation to back them up. It is the single most common reason seafarer applications stall.
Tip: You do not have to wait for the 31 January deadline. A tax year ends on 5 April and you can file your return from 6 April, so filing early means your SA302 and tax year overview are available months sooner. HMRC also only issues an NT tax code once your first SED claim has been processed, so early filing helps there too. Your accountant or HMRC can confirm whether you qualify for SED in the first place.
Some lenders may consider payslips, your employment contract and bank statements before your first SA302 is available, but the choice is narrower and criteria vary. If you are in this position, speak to a mortgage broker at Quanstrom Financial before you apply anywhere, so a decline does not end up on your credit file for no good reason.
Which type of seafarer are you?
"Seafarer" covers very different jobs, and lenders look at each slightly differently. This is a general guide to where SED tends to fit and what lenders usually focus on.
| Your role | Can SED apply? | What lenders tend to focus on |
|---|---|---|
| Merchant navy officer or rating | Often, if you meet HMRC's conditions | Payslips, contract and SA302s if tax is not deducted at source |
| Cruise ship crew | Often, if employed and UK resident | Who pays you, which currency you are paid in, and your contract pattern |
| Superyacht crew | Often, if employed and UK resident | Contract length, gaps between contracts and foreign currency pay |
| Offshore oil and gas installation worker | No, HMRC does not treat installations as ships | Usually assessed like other employed pay, including allowances |
| Royal Navy | No, Crown employees are excluded | Usually assessed as standard employed income |
| Self-employed at sea | No, SED is for employees only | Usually assessed on self-employed criteria, such as SA302s |
If you work on contracts through an agency or your own company, our guides to mortgages for contractors and getting a mortgage when you are self-employed explain how those income types are usually assessed.
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What if you are paid in dollars or euros?
Many cruise and superyacht crew are paid by overseas employers in US dollars or euros. Lenders treat this as foreign currency income, and it is where the choice of lender makes the biggest difference to what you could borrow.
Some well-known lenders, including Nationwide, will not use foreign currency income at all. Others accept it but take a "haircut", a percentage off your converted income to allow for exchange rate movements, commonly somewhere around 10% to 25%. NatWest uses 100% of converted income with no haircut, but only for currencies on its own accepted list. As an illustration, on pay worth £70,000 once converted, a lender that counts 75% of it uses £17,500 less income than one that counts all of it. At 4.5 times income, that is a difference of almost £79,000 in what you could borrow.
Our guide to mortgages with foreign currency income sets out which lenders accept which currencies, and how much of your income each one counts.
Do you need to live in the UK to get a seafarer mortgage?
For a standard UK residential mortgage, generally yes. Lenders want the property to be your home, and they look for a UK base you return to between trips. NatWest's criteria, for example, say you must live in the UK when you are not at sea, and must have the permanent right to reside in the UK, settled or pre-settled status, or Irish citizenship.
If you have made your home abroad and only visit the UK, you would usually need an expat mortgage instead, which tends to come from a smaller group of lenders. If you are coming ashore for good, our guide to returning expat mortgages covers buying once you are back.
Which situation are you in?
Tap whichever sounds most like you.
1This is my first year claiming SED▾
You may not have an SA302 yet, which narrows your choice of lenders. Filing your tax return as early as possible after 5 April helps. Some lenders may consider your payslips, contract and bank statements in the meantime, subject to their criteria.
2I have SA302s that show my SED claim▾
This is usually the strongest position to apply from. Lenders that accept SED income can see a consistent history of your earnings and how your tax is handled, and you are likely to have more lenders to choose from.
3I am paid in a foreign currency by an overseas employer▾
Your lender choice depends on whether your currency is accepted and how much of a haircut is applied. Two lenders can give very different answers on the same salary, so it is worth comparing before you apply.
4I work on short or rotating contracts▾
Lenders will want to see a pattern of work, how long your current contract has left to run and how you have handled gaps. A steady history of returning to the same employer or vessel can help.
5My partner works ashore▾
A joint application with a partner on UK income can widen your choice of lenders and may strengthen affordability. The lender still needs to be comfortable with your share of the income.
6I want to buy a property to let out▾
Buy-to-let lenders focus mainly on the rent the property could achieve, and many look for a larger deposit, often around 25%. Some prefer you to own your own home already.
If you are thinking about a rental property, our guide to buy-to-let mortgages and the Quanstrom Financial buy-to-let mortgage page explain how lenders assess them.
What documents do seafarers need for a mortgage?
Every lender is different, but you can usually expect to provide:
- Recent payslips, typically your latest three months
- Your employment contract or seafarer employment agreement, showing your employer, pay and contract length
- SA302 tax calculations and tax year overviews, if you claim SED or tax is not deducted at source
- Bank statements showing your pay arriving
- Proof of identity and your right to live in the UK
- Proof of your deposit
Keep your discharge book and travel records safe too. HMRC can ask for them to support an SED claim, and they help show the pattern of your work. If you are not sure how to download your tax documents, our guide to getting your tax calculation and tax year overview walks you through it.
How much could a seafarer borrow?
Once a lender accepts your income, the amount you could borrow is worked out in much the same way as for anyone else. Many lenders lend around 4.5 times income, with a smaller number going to 5 or 6 times for the right circumstances, subject to affordability and your outgoings. A good credit file helps, and our guide to improving your credit score is a useful read if you have spent long periods abroad.
Use the calculator below with your gross annual pay in pounds. If you are paid in another currency, convert it first, and try a figure 10% to 25% lower to see what a lender with a haircut might use.
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Can you apply for a mortgage while you are at sea?
Often, yes. Most of the process can be handled by email, phone and video, and documents can usually be signed electronically. A little planning makes it much smoother:
- Get a Decision in Principle before you sail. It gives you a clear idea of your budget before you start looking. Our borrowing calculator is a good place to start.
- Share your rotation dates. Your adviser, solicitor and estate agent can then plan valuations, signatures and exchange around the times you have signal or are ashore.
- Line up a contact at home. A partner or family member can be useful for viewings and letting a valuer in. Some buyers also use a power of attorney, though lenders and solicitors each have their own rules on accepting one.
- Check your home insurance. Many policies limit cover if the property is left empty for a long stretch, so check the unoccupancy terms if your home will sit empty while you are away.
Good to know: Protecting your income matters when you are the one earning it at sea. Some insurers ask about where you work and the type of vessel, so it is worth speaking to someone who can compare providers. Quanstrom Financial also arranges income protection and life insurance alongside your mortgage.
Help from a mortgage broker in Eastbourne
Quanstrom Financial is a whole-of-market mortgage broker based in Eastbourne, comparing more than 90 lenders. Quanstrom Financial helps buyers across East Sussex and the south coast, including the port towns of Newhaven and Shoreham-by-Sea, and seafarers anywhere in the UK by phone or video, whether you are buying your first home, moving home or looking to remortgage.
Book a free consultation through the contact page, ideally before your next trip, and find out which lenders may accept your income.
Frequently asked questions
Can seafarers get a mortgage in the UK?
Yes, seafarers can get a mortgage in the UK, subject to lender criteria. Fewer lenders are set up to assess seafarer income, especially where tax is not deducted at source or you are paid in a foreign currency, so choosing the right lender matters more than it would for most employed buyers.
Does the Seafarers' Earnings Deduction affect my mortgage application?
It can. Lenders generally base borrowing on your gross pay, so SED does not usually increase how much you can borrow. Because no tax is taken at source, lenders that accept SED income usually want your SA302 tax calculations as well as your payslips.
Can I get a mortgage with an NT tax code?
You may be able to. An NT code means no tax is deducted from your pay, so lenders will usually want to see your tax returns alongside your payslips to understand your position. Some lenders are comfortable with this and others are not, so it helps to know which is which before you apply.
Can I get a mortgage in my first year of claiming SED?
It is possible, but your options are narrower because you may not have an SA302 yet. Filing your tax return soon after the tax year ends on 5 April can help, and some lenders may consider payslips, your contract and bank statements in the meantime, subject to their criteria.
Can yacht crew get a UK mortgage?
Yes, subject to lender criteria. Superyacht crew are often on fixed-term contracts and paid in euros or US dollars, so lenders tend to focus on your contract history, any gaps between contracts and whether your currency is accepted.
Do I need an expat mortgage if I work at sea?
Not usually, if your home is in the UK and you return to it between trips. If you have made your home abroad and only visit the UK, you would usually need an expat mortgage instead.
Can seafarers get a buy-to-let mortgage?
Yes, some lenders consider buy-to-let applications from seafarers. Buy-to-let lenders focus mainly on the expected rent, many look for a deposit of around 25%, and some prefer you to own your own home already.
Can I apply for a mortgage while I am at sea?
Often, yes. Most of the process can be handled by email, phone and video, and documents can usually be signed electronically. Sharing your rotation dates with your adviser and solicitor helps them plan valuations and signatures around your time ashore.
Can Royal Navy personnel claim the Seafarers' Earnings Deduction?
No. HMRC excludes Crown employees, which includes Royal Navy personnel, although Royal Fleet Auxiliary employees can qualify if they meet the conditions. Royal Navy pay is usually assessed by lenders as standard employed income.
Written by Toby Quanstrom CeMAP, Director at Quanstrom Financial, a whole-of-market mortgage broker based in Eastbourne, East Sussex, specialising in mortgages for people with complex and overseas income.
Lender criteria in this guide are correct as at November 2026 and subject to change. Foreign currency criteria are taken from our foreign currency income guide, correct as at 6 October 2026.
This article is general information only and does not constitute personal advice. It is not tax advice: whether you qualify for the Seafarers' Earnings Deduction is a matter for HMRC, and you should speak to an accountant or tax adviser about your own position. What you may be able to borrow depends on your individual circumstances and lender criteria. Calculator figures are illustrations only and are not a mortgage offer. Most buy-to-let mortgages are not regulated by the Financial Conduct Authority.
Your home may be repossessed if you do not keep up repayments on your mortgage.
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