Moving hundreds of thousands of pounds from a UK bank account to a Golden Visa or citizenship investment abroad is not the same as sending money to family or paying an overseas supplier. It is a compliance exercise as much as a currency one, and getting either side wrong can cost real money: a poor exchange rate can quietly erode thousands of pounds, while an incomplete source of funds trail can delay or damage the application.

This article sets out how to plan the transfer properly, what documentation you may be asked for, and where the process differs between a Greek property purchase, a Portuguese fund subscription and a Caribbean citizenship contribution.

Why your bank is rarely the cheapest way to send large sums

How much does it cost to send €500,000 through a high street bank compared with a specialist provider? Many retail banks build a margin into the exchange rate they offer, even when they advertise “no transfer fees”. A specialist currency provider may offer a much tighter spread, but the exact saving depends on the provider, currency pair, timing and whether you are using a payment service, an e-money account or a foreign exchange contract.

As a simple example, the difference between a 3% margin and a 0.5% margin on a €500,000 transfer is €12,500 before any fixed fees. At Golden Visa scale, that difference matters. Our Golden Visa application cost breakdown already recommends budgeting a buffer for FX movement, bank spreads and transfer costs on top of the headline investment figure, and choosing the right transfer route is one of the easiest ways to stop that buffer being wasted unnecessarily.

Comparing your transfer options

Route	Typical cost profile	Speed for large sums	Best suited to
High street bank	Convenient, but the exchange-rate margin can be costly	Usually 2 to 5 working days	Smaller or simpler transfers where convenience matters most
FCA-authorised specialist provider	Often a tighter FX spread, with clearer pricing on large transfers	Same day to 2 working days, subject to checks	Golden Visa investments, property completions and fund subscriptions
Digital transfer app	Competitive for some currencies, but limits and compliance checks can apply	1 to 2 working days	Amounts within the provider’s published limits
Informal or third-party channels	Not appropriate	Not appropriate	Never appropriate for a Golden Visa or CBI investment

The last row matters more than it might look. Any suggestion of routing investment funds through an informal channel, a third party’s account, or a series of transfers structured to stay under a reporting threshold is a serious red flag to banks, lawyers and immigration authorities. It can jeopardise the application rather than simply saving a small amount on fees.

The source of funds problem is bigger than the FX problem

There is no reliable programme-wide public percentage for how many Golden Visa applications are delayed because of source of funds checks, but the practical risk is clear: authorities and financial institutions want to see a clean, traceable line from where the money was earned or accumulated through to the account from which it is paid.

That means gathering bank statements, tax returns, payslips, dividend records, sale agreements, gift letters or inheritance documentation well before you are ready to transfer. A short written explanation of how the funds were built up, alongside the paperwork itself, also makes the file easier to review. Our Turkey CBI source of funds guide sets out what a well-built file looks like in practice, and the same discipline applies whichever programme you are pursuing.

How the money actually needs to move, by programme

The mechanics differ enough between programmes that treating them identically can create avoidable problems.

For Greece, you will usually need a Greek tax number, known as an AFM, before the transaction can complete. A Greek bank account is not always mandatory in every case, but the investment funds relied on for Golden Visa eligibility must move through permitted, traceable banking channels and be evidenced in the notarial documentation. Cash is not a sensible route for a qualifying Golden Visa purchase. Our guide to buying Greek property and managing the process from abroad covers the wider remote-purchase process, and leaving source of funds checks until the transfer deadline is one of the most common ways buyers lose time.

For Portugal’s fund route, the money may not always move in one simple transfer. Fund subscriptions can involve onboarding checks with the fund, the bank and the lawyer, and some structures call capital in stages rather than as a single lump sum. Your currency planning therefore needs to account for more than one transfer date. Our guide to choosing a compliant fund and understanding its risks walks through what to check before you move any money.

For Caribbean citizenship programmes such as St Kitts and Nevis, due diligence is usually more intensive because citizenship-by-investment programmes attract additional international scrutiny. Expect a detailed source of funds file to be requested early in the process, and build that into your timeline from the outset rather than treating it as a formality. Our coverage of the 2026 genuine-link reforms touches on how compliance expectations have tightened across the programme more broadly.

Managing exchange rate risk over a multi-month timeline

A Golden Visa process rarely completes in a single week, and the exchange rate you check today is not necessarily the rate you will get when funds actually need to move. Even a modest 2% to 3% adverse swing in GBP against the euro over the months between choosing an investment and completing it can add several thousand pounds to a €400,000 to €800,000 purchase.

A forward contract, offered by many specialist currency providers, lets you lock in an exchange rate for a transfer that will happen later. This can remove uncertainty from your budget once you have a firm completion date, such as a property notary appointment or a fund capital call. It is not a free option, though. You may need to pay a deposit, and you will usually be committed to completing the trade, so discuss the timing and risks before booking one.

Choosing a provider you can actually trust with this amount

At this scale, the provider matters as much as the rate. Check the firm on the Financial Conduct Authority’s Financial Services Register and make sure it is authorised or registered for the service you are using. Also ask how your money is protected while it is with the provider. For payment and e-money services, safeguarded client funds should be kept separate from the firm’s own money, but this is not the same as FSCS protection and not every FX-related service is protected in the same way.

A dedicated dealer who understands investment migration timelines, rather than a generic call centre, tends to make the process smoother, particularly when a completion date shifts and a transfer needs to be rebooked at short notice.

In our experience, clients who involve their currency provider and immigration lawyer in the same conversation avoid the timing mismatches that cause the most stress: a rate locked in for the wrong date, a transfer delayed by missing paperwork, or funds arriving after a notary deadline.

Common mistakes worth avoiding

Leaving currency planning until the transfer is due is the most common error, because it removes the chance to manage rate risk or gather documentation calmly. Assuming a bank’s “no fee” transfer is actually free is another, when the real cost often sits in the exchange rate rather than a headline fee.

Do not split payments into smaller amounts to avoid scrutiny. That is not a shortcut; it is a compliance problem. Also avoid paying from an account that does not clearly belong to the applicant unless your lawyer has approved the structure and the source of funds evidence supports it. Working with a lawyer rather than a consultant on the wider application, alongside a properly regulated FX provider for the transfer itself, means both sides of the issue, cost and compliance, are being handled together.

If you’re weighing up which programme to fund

The scale and structure of the transfer can be a genuine factor in choosing between routes. A single lump sum property purchase, as with Greece, is a simpler currency exercise than a staged fund subscription. If you are still deciding between residency by investment and citizenship by investment more broadly, it is worth factoring the funding mechanics into that comparison, not just the headline investment amount.

Options like the Greece Financially Independent Person visa, Italy’s investor visa, Dominica and St Lucia’s citizenship by investment programme each involve different transfer structures worth understanding before you commit to one.

Frequently asked questions

Is it actually cheaper to use a currency broker instead of my bank for a Golden Visa transfer?

Often, yes, but compare the final amount received rather than just the headline fee. Banks may charge through the exchange rate, while specialist providers may offer tighter pricing for larger transfers.

How early should I start preparing source of funds documentation?

As early as possible, ideally as soon as you decide which programme and investment route to pursue. Gathering bank statements, tax returns and evidence of how the funds were accumulated takes time to do properly.

Can I use multiple smaller transfers to avoid extra scrutiny?

No. Splitting transfers to stay under a reporting or review threshold is treated as a red flag by banks and regulators, and it can damage an otherwise legitimate application.

What is a forward contract and do I need one?

A forward contract lets you lock in an exchange rate for a transfer that will complete later. It can be useful once you have a firm completion date, but it is usually a binding arrangement, so it should be used carefully.

If you are planning a large cross-border transfer for a Golden Visa or citizenship investment, Coates Global’s immigration lawyers can help you sequence the transfer against your application timeline and make sure your source of funds file is ready before it is needed. Get in touch before you move any money.