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A bank to bank transfer sounds like the dullest thing in finance. You type in an account number, confirm it, and the money moves. Nothing to see. Except that when it goes wrong, it usually goes wrong slowly and expensively, and nobody at the call centre can tell you exactly where your £4,000 is sitting.
So it's worth understanding what's actually happening. Here's the version most banks don't bother explaining.
Strip away the jargon and it's exactly what it sounds like: money moving from one account to another with no cash, no cheque and no card involved. You give your bank an instruction, it debits your account, and the funds land in the recipient's account. Sometimes that takes eight seconds. Sometimes it takes four working days.
That gap is where most of the confusion lives. A transfer between two accounts at the same bank clears almost instantly. A transfer to a supplier in Vietnam can pass through three institutions you've never heard of before it lands.
Most countries run their own clearing system, and they're cheap to operate because everyone involved is inside the same regulatory club. In the UK it's Faster Payments, which processes billions of payments a year and settles most of them within seconds. The eurozone uses SEPA, where a standard credit transfer arrives by the next business day. The US has ACH for batched payments and FedNow for instant ones.
Because these systems are domestic and highly automated, a bank to bank transfer within the same country is usually free or costs a couple of pounds at most.
Cross-border payments are a different animal. There is no global clearing house, so banks fall back on SWIFT: a messaging network, not a payment system. Your bank sends an instruction to the recipient's bank, frequently via one or two correspondent banks in the middle, and every hop can shave off a fee and add a day. If you've ever wondered why a payment vanished for 72 hours and then arrived £18 light, that's the reason. There's a fuller breakdown of [what actually happens to a wire transfer after you press send](https://currencies.global/blog/international-wire-transfer-what-really-happens-after-you-hit-send) if you want the mechanics.
Ask your bank what a transfer costs and they'll quote you the sending fee. That's rarely the whole story. A typical international transfer can carry four separate charges:
That last point deserves its own paragraph. If you send £5,000 to France and the bank applies a rate 2.8% worse than the mid-market rate, you've paid £140 without seeing a line item for it. Add a £20 fee and you've handed over £160, or 3.2% of the transfer. A specialist provider might do the same job for £4 plus 0.4%. On a £5,000 payment that's the difference between £160 and £24. Multiply that across a house deposit or a year of supplier invoices and it stops being small change. There are practical ways to avoid handing over [3% just for the privilege of moving your own money](https://currencies.global/blog/transfer-money-overseas-without-paying-3-for-the-privilege), and it's worth comparing before you commit.
Getting the details wrong is the single most common cause of delayed transfers, and in the worst cases it's how people lose money to fraud. Have all of this in front of you before you open the banking app:
Several countries now run name-checking services, where your bank verifies that the account name matches the details you entered and warns you if it doesn't. Use them. They exist because a single transposed digit can send your money to a stranger, and recovering it requires the recipient's permission plus a fee. If a supplier emails you new bank details mid-invoice, phone them on a number you already have on file before sending anything.
Speed depends almost entirely on the rails your money is travelling on.
Cut-off times matter more than people expect. A payment submitted at 4:55pm on a Friday may not move until Monday morning. If a deadline is tight, send it early in the day and check the bank's cut-off for that currency.
Bank transfers are hard to beat for large sums, property deposits, payroll and anything where the recipient needs the money in an actual bank account. There's no card limit to negotiate and no third-party wallet in the middle.
They're less useful for small, urgent payments or for sending money to someone who doesn't have a bank account. For those, a card payment or a cash pickup service often makes more sense. It's also worth knowing that [online transfer services now handle most of what banks do](https://currencies.global/blog/send-money-online-a-no-nonsense-guide-to-fees-speed-and-safety), usually faster and at a lower cost, though the quality varies considerably between providers.
If a transfer hasn't arrived, don't panic and don't send a second one. Ask your bank for the payment's unique reference number and its status: sent, in transit, or held. If it's been stopped for a compliance check, that number is what gets it moving again.
If the money went to the wrong account because of a typo, your bank can request a recall, but it can't force the recipient's bank to return funds without permission. That's why the ten seconds you spend reading the account name back to yourself are worth more than any insurance policy.
And a word on scams, because this is where most real losses happen. No genuine bank will ever ask you to move money to a "safe account" to protect it. No legitimate supplier will insist on payment within the hour by transfer while refusing to take a phone call. If the urgency feels engineered, it probably is. Slow down, call the person on a number you already have, and if the rates or fees look off, read up on [how to send money abroad without paying over the odds](https://currencies.global/blog/how-to-send-money-abroad-without-paying-over-the-odds) before you send anything at all.
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