US vs UK Banking: What's Actually Different

Moving money across the Atlantic sounds simple until you actually try it. Whether you're an American moving to London, a Brit relocating to New York, or just curious about how the other side banks, the differences are bigger than you might expect. Here's a practical guide to what actually changes.

Account Numbers: Sort Codes vs Routing Numbers

In the UK, every bank account has a six-digit sort code and an eight-digit account number. The sort code identifies the bank and branch; the account number identifies you. Memorising them is common, and sharing them is how you get paid — it's the normal way to receive a salary or split a bill.

In the US, accounts use a nine-digit routing number plus an account number. Routing numbers work in a similar way, but there's a twist: a single bank can have different routing numbers for different states or regions, which confuses newcomers. Some banks also use a different routing number for wire transfers than for direct deposits, so always check which one you need before giving it out.

How Money Moves: Faster Payments vs ACH

This is where daily life feels most different. In the UK, bank-to-bank transfers typically arrive in seconds thanks to the Faster Payments system. Sending money to a friend, paying rent, or settling a bill usually means the money lands almost instantly, at no cost, at any time of day or night.

The US has been catching up. Traditional ACH transfers can take one to three business days, which feels slow if you're used to instant payments. Newer options like Zelle move money between major US banks within minutes and are built into most banking apps. Real-time payment networks keep expanding, but coverage isn't universal yet, so always check how long a transfer will take before you send it.

And then there are checks. In the UK, personal cheques are nearly extinct — many younger people have never written one. In the US, checks are still surprisingly common for things like rent payments and some bills. If you move to the US, you may need to order a checkbook; if you move to the UK, you can probably leave the concept behind entirely.

Debit Cards: Chip and PIN Is the Norm

Both countries use chip cards, but the habits differ. In the UK, chip-and-PIN verification is standard for in-store purchases, and contactless payments are accepted almost everywhere, including on public transport in many cities. Tapping to pay is simply the default.

In the US, many transactions are still completed with just a signature, or with no verification at all for small amounts, though chip and contactless adoption has grown quickly in recent years. One practical tip: if your US debit card has no PIN for purchases, set one up before travelling, since some unattended terminals abroad expect a PIN and won't accept a signature.

Credit Cards and Credit Scores

Here's a big one: your credit history does not cross the border. Moving from the US to the UK, or the other way round, means starting from zero — no matter how excellent your score was back home.

The systems also work differently. In the US, credit scores are central to financial life and get used for everything from credit cards to apartment rentals. Credit cards are the main tool for building a score, and rewards cards are everywhere.

In the UK, there is no single universal score. Three main credit reference agencies each keep their own file on you, and lenders look at the underlying data rather than one magic number. Credit cards exist and work much the same way, but debit cards play a bigger role in everyday spending, and "building credit" as a concept gets less attention — though it still matters when you apply for a mortgage or a loan.

Fees and Overdrafts

Fee culture differs between the two countries. In the US, monthly maintenance fees on checking accounts are common, though usually waivable if you keep a minimum balance or set up direct deposit. Overdraft fees can be steep, and opting into overdraft "protection" on debit card purchases is a choice worth thinking about carefully.

In the UK, standard current accounts typically have no monthly fee, and many banks have moved away from charging for unarranged overdrafts the way they once did. That said, premium "packaged" accounts with monthly fees exist in both countries — always check what you're actually getting for the fee before signing up.

Foreign transaction fees deserve a mention too. Using your home card abroad often adds a percentage fee to every purchase. If you travel or move, look for cards with no foreign transaction fees; the savings add up fast.

Savings and Interest

Both countries have competitive online banks offering better savings rates than traditional high-street or brick-and-mortar banks. The mechanics are similar: easy-access savings accounts, fixed-term options (called certificates of deposit, or CDs, in the US), and tax-advantaged accounts that differ by country — ISAs in the UK being the best-known example.

One practical difference is tax treatment. In the UK, many savers pay no tax on savings interest thanks to the personal savings allowance. In the US, savings interest is generally taxable income that you report yourself. Tax rules change and personal situations vary, so check the current local rules or ask a professional if you're unsure.

Bank Holidays and Customer Service

Bank holidays don't line up between the two countries, which matters more than you'd think when you're waiting on a transfer. A US federal holiday won't stop UK payments, and a UK bank holiday won't stop US ones — something to remember if you're paid across borders or have bills due on both sides.

Branch hours and customer service expectations are converging thanks to mobile apps, which in both countries now handle most everyday tasks: depositing checks or cheques, making transfers, freezing a lost card, and chatting with support.

Practical Tips for Banking Across Borders

• Open your new account before you move if you can; some banks let you start the process from abroad.
• Keep your old account open for a few months to catch stray payments and forgotten subscriptions.
• Tell your bank you're travelling or relocating so your cards don't get frozen for "suspicious activity."
• Compare the true cost of international transfers — your bank's exchange rate markup often costs more than the stated fee.
• Build a local credit history early with a basic credit card or credit-builder product, even if you don't need to borrow yet.

The Bottom Line

US and UK banking share the same foundations — accounts, cards, transfers, savings — but the details of daily money life differ in ways that can trip you up. Faster Payments versus ACH, sort codes versus routing numbers, and starting your credit history from scratch are the big ones to know. Learn those before you go, and the move gets a lot less stressful.