Common US and UK Banking Terms You Need To Know

If you've ever tried to set up a bank transfer and hit a wall of unfamiliar terms like routing number, sort code, ACH, IBAN, or SWIFT, you're not alone. These are some of the most Googled banking questions, and the confusion makes sense: the US and UK use completely different systems with different names. To help you better understand them, this guide breaks down every key term you'll encounter when sending or receiving money in the US or the UK, in simple terms.

US Banking Terms

What is a routing number?

A routing number is a 9-digit code that identifies a specific bank in the United States. Think of it as your bank's address; it tells the payment system which bank to route the money to.

Every US bank has at least one routing number, and some large banks have different routing numbers depending on the state in which you opened your account. You'll find it printed at the bottom-left corner of any paper check.

What is an ACH transfer?

ACH stands for Automated Clearing House. It's the electronic network that processes the majority of bank-to-bank payments in the United States, including salary direct deposits, bill autopayments, and most peer-to-peer transfers (including the backend of apps like Venmo and Zelle).

ACH works in batches, meaning payments are grouped and processed together rather than processed individually. This makes it reliable and low-cost (often free), but not instant. Standard ACH usually takes 1 to 3 business days to settle. Same-Day ACH now exists for faster transfers, though not all banks support it.

To send an ACH transfer, you need the recipient's routing number and account number. ACH only works within the US and cannot be used to send money internationally.

Example: When your employer deposits your pay directly into your bank account every two weeks, that's an ACH credit transfer.

What is a checking account?

A checking account is the standard US bank account for day-to-day use, covering things like receiving your salary, paying bills, and making purchases with a debit card. It's the US equivalent of what the UK calls a current account.

Your checking account comes with a routing number and an account number. Most banks also issue a checkbook, though checks are used far less than they used to be. Many US banks charge a monthly maintenance fee unless you meet certain conditions, such as receiving regular direct deposits or maintaining a minimum balance.

What is a wire transfer?

A wire transfer is a direct, bank-to-bank payment that moves money faster than ACH, usually arriving the same business day if sent before the bank's cutoff time. Wire transfers are used for large payments, such as buying a car, paying a property deposit, or sending money internationally.

The trade-off is cost. US banks typically charge $15 to $50 per wire transfer. For international wire transfers, you'll need the recipient's account number, SWIFT/BIC code, and, often, their IBAN if they're in Europe.

UK Banking Terms

What is a sort code?

A sort code is a 6-digit number, always displayed as three pairs of digits separated by dashes, such as 20-00-00, that identifies both the bank and the specific branch in the UK. It's the UK equivalent of a US routing number.

Whenever you make a domestic UK payment, whether that's a bank transfer, setting up a direct debit, or receiving your salary, you'll need your sort code alongside your account number. The two always go together.

What is a UK account number?

Your UK bank account number is an 8-digit identifier for your specific account. On its own, it's not enough; you always need your sort code too, since the same account number could theoretically exist at different banks.

Together, your sort code and account number are everything someone needs to send you money domestically within the UK.  Don’t have one? Create a Raenest account now. 

What is CHAPS?

CHAPS stands for Clearing House Automated Payment System. It's the UK's same-day payment system for large or time-critical transfers, run by the Bank of England.

Unlike Faster Payments, CHAPS typically carries a fee of £20 to £35 per transaction. It's mainly used for property purchases, large business payments, or transfers that require a guaranteed same-day settlement. Payments must be sent before the bank's CHAPS cutoff, usually between 3 pm and 5 pm.

What is a Direct Debit?

A Direct Debit is a UK payment instruction that allows a company to debit your bank account on an agreed schedule. You give the company a mandate with your sort code and account number, and they handle the rest.

Direct Debits are protected by the Direct Debit Guarantee, which means if a payment is taken in error, your bank must refund you immediately, no questions asked. This is different from a standing order, which you set up yourself and control.

Example: Monthly gym memberships, utility bills, and broadband payments are almost always collected by Direct Debit.

International Terms (Used in Both Countries)

What is an IBAN?

IBAN stands for International Bank Account Number. It's a standardised format for identifying a bank account internationally, used across Europe and many other countries worldwide.

An IBAN is up to 34 characters long and always starts with a 2-letter country code (GB for the UK, DE for Germany, FR for France, and so on), followed by 2 check digits, and then the bank-specific account details. If you're sending or receiving money to or from Europe, you'll almost certainly need an IBAN.

The US does not use IBANs domestically, but US banks can receive international wires from accounts that have them.

Example: GB29 NWBK 6016 1331 9268 19 — GB = United Kingdom, 29 = check digits, NWBK = NatWest bank code, the rest = the account number.

What is a SWIFT code (BIC)?

A SWIFT code (also called a BIC, which stands for Bank Identifier Code) is a unique code that identifies a specific bank internationally. It's 8 or 11 characters long: 4 letters for the bank, 2 letters for the country, 2 characters for the city, and optionally 3 characters for the branch.

For any international wire transfer, you'll need the recipient's SWIFT/BIC code alongside their account number or IBAN. It's how banks around the world find each other.

Example: BARCGB22 = Barclays Bank, London. CHASUS33 = JPMorgan Chase, US.

What is SEPA?

SEPA stands for Single Euro Payments Area. It's a European integration that allows euro-denominated transfers between 36 countries to be processed as easily and cheaply as domestic payments, with no international fees and settlement in 1 business day (or instantly with SEPA Instant).

To send a SEPA transfer, you only need the recipient's IBAN. After Brexit, the UK is no longer part of SEPA, so transfers from UK accounts to EU accounts may incur fees and take longer than before.

Final thoughts

Need a deeper dive? We’ve written a comprehensive guide to the US banking system that breaks down the exact clearing times for ACH, SWIFT, and wire transfers. It also explains how daily bank deadlines affect your cash flow, highlights common errors that slow payments, and shares relevant case studies from operations in Nigeria, Ghana, and Kenya. Download the free guide here. And if you haven’t already, make sure you download the Raenest app and create a Raenest account today. With Raenest, you can:

• Open a USD account with routing and account numbers accepted widely for ACH/US bank payments.
• Receive international payments, including salaries, freelance payments (from popular platforms like Upwork and Fiverr), transfers from clients and loved ones, and payouts from global platforms.
• Get your Upwork payments in under 60 minutes with Raenest FastTrack.
• Receive USDT and USDC, automatically converted to USD with the same value and no delays.
• Convert to other currencies anytime at competitive rates and withdraw to your bank account.
• Send money worldwide.
• Enjoy better rates, fast transfers, and low fees