The bank switching service in the UK, officially known as the Current Account Switch Service (CASS), is a free automated service that moves your entire banking relationship from one provider to another within seven working days. Launched in 2013, CASS handles everything from transferring your balance to redirecting payments, making it remarkably simple to switch banks and access better deals or services.
Whether you're chasing a switching bonus, seeking better customer service, or wanting to try a digital bank, understanding how the bank switching service works removes the biggest barrier to changing your current account.
What is the Current Account Switch Service (CASS)?
The Current Account Switch Service is a centralised switching infrastructure managed by Pay.UK (formerly Bacs Payment Schemes Limited). It connects all major UK banks and building societies, allowing customers to switch current accounts seamlessly.
CASS covers over 99% of UK current accounts, including accounts from traditional high street banks, digital challenger banks, and building societies. The service is completely free to use and comes with a guarantee that protects you if anything goes wrong during the switch.
The system was created following years of complaints about the difficulty of switching banks. Before CASS, customers had to manually contact every company that paid money into or took money from their account - a process so daunting that many people stuck with unsuitable accounts for decades.
Take Action: Check if your current bank and your target bank both participate in CASS by visiting the official Current Account Switch Service website.
How does the bank switching service work?
The bank switching process follows a standardised seven-day timeline that removes virtually all the manual work from your shoulders.
Day 1: You initiate the switch
Visit your new bank (in branch, online, or via app) and request to use CASS. You'll provide your old account details and choose a switch date. Your new bank handles everything from this point forward.
Days 2-6: Automatic transfers happen
Your new bank contacts your old bank through CASS to request your account history, including all direct debits, standing orders, and recent payment patterns. They set up all your regular payments on the new account and arrange for your balance to transfer on the switch date.
Day 7: The switch completes
Your old account closes automatically, your balance transfers to your new account, and all your regular payments switch over. Any payments mistakenly sent to your old account get automatically redirected to your new account for 13 months.
The entire process typically completes within seven working days, though some banks offer faster switching in as little as one working day for certain account types.
What does CASS transfer automatically?
CASS moves virtually every aspect of your banking relationship to eliminate the hassle of manual switching.
Payment arrangements transferred:
- All direct debits (gym memberships, insurance, utilities)
- Standing orders (rent payments, regular transfers)
- recurring card payments where the merchant participates
- Your account balance on the switch date
- Arranged overdrafts (subject to new bank's approval)
Information shared:
Your new bank receives 13 months of transaction history from your old account. This helps them identify regular payments and ensures nothing important gets missed during the transfer process.
Automatic redirection:
For 13 months after switching, any payments sent to your old account sort code and account number get automatically forwarded to your new account. This safety net catches payments from companies or individuals who haven't updated their records.
However, CASS doesn't transfer everything automatically. You'll need to update your details manually with some services, particularly newer digital payment platforms.
What isn't covered by the bank switching service?
While CASS handles the majority of your banking relationships, some elements require manual updates.
Services you must update manually:
- PayPal and similar digital wallets
- Apple Pay, Google Pay, and Samsung Pay
- Prepaid cards and travel money cards
- Some newer subscription services that don't use traditional direct debits
- International payments and standing orders
- Premium bonds and NS&I products
Credit products:
CASS only transfers current account facilities. Your credit cards, loans, and mortgages remain with your original provider unless you specifically arrange to move them separately.
Your new bank may offer to transfer credit products during the switching process, but this involves separate applications and credit checks rather than automatic transfers through CASS.
Take Action: Before switching, make a list of all digital payment services you use and plan to update these manually after your switch completes.
Bank switching guarantee and protection
CASS includes a comprehensive guarantee that protects you throughout the switching process and for months afterwards.
The switching guarantee covers:
- Refunding any charges on your old account if CASS causes delays
- Refunding charges on your new account caused by CASS problems
- Paying any interest lost due to switching delays
- Correcting any mistakes made during the transfer process
If something goes wrong, you should contact your new bank first, as they're responsible for managing your switch. If they can't resolve the issue, you can escalate to the Financial Ombudsman Service.
The guarantee remains active for 13 months after your switch, covering the entire period when payments might still arrive at your old account. This extended protection period ensures you won't lose money if a company takes longer than expected to update their records.
Most switches complete without problems, but the guarantee provides valuable peace of mind for customers worried about changing their primary banking relationship.
How to use CASS to switch banks
Starting a CASS switch is straightforward, but preparation helps ensure everything goes smoothly.
Before you start:
- Choose your new bank and open your new account
- Ensure both banks participate in CASS
- Decide whether you want to close your old account (recommended) or keep both temporarily
- Pick a switch date at least seven working days in the future
- Check your old account has sufficient funds to cover any pending payments
The switching process:
Visit your new bank's branch, website, or app and request to switch using CASS. You'll need your old account's sort code, account number, and recent bank statements. Your new bank will guide you through their specific process, which varies slightly between providers.
Most banks let you complete the entire switch request online or through their mobile app. Some providers, particularly Monzo, have streamlined their switching process with user-friendly interfaces that make the process even simpler.
After initiating the switch:
Your new bank will send you a detailed list of all the direct debits and standing orders they've identified. Check this carefully and contact them immediately if anything looks wrong or if you notice anything missing.
Digital banks vs traditional banks for switching
The rise of digital challenger banks has transformed the UK banking landscape, with many offering superior switching experiences and attractive incentives.
Digital banks like Monzo, Starling, and Revolut typically offer:
- Faster switching processes (sometimes 24-48 hours)
- Better switching support through in-app chat
- More transparent switching progress tracking
- Generous switching bonuses and cashback offers
Traditional high street banks generally provide:
- More comprehensive branch networks for face-to-face support
- Established relationships with more payment providers
- Higher arranged overdraft limits
- Integration with other financial products like mortgages
Both digital and traditional banks must follow the same CASS processes, but digital banks often wrap the service in more user-friendly interfaces. They also tend to be more competitive with switching incentives, sometimes offering cash bonuses of £100-200 for new customers.
The FCA's recent data shows that customer satisfaction with digital banks remains consistently higher than traditional banks, partly due to their superior switching experiences.
Bank switching bonuses and incentives in 2026
Many UK banks offer attractive incentives to encourage customers to switch their current accounts, making 2026 an excellent time to consider changing banks.
Common switching incentives include:
- Cash bonuses ranging from £75-200 for switching via CASS
- Cashback on purchases for the first few months
- Higher interest rates on current account balances
- Free banking perks like travel insurance or breakdown cover
- Waived fees for premium account features
Popular switching deals currently available:
Several banks offer competitive switching packages. Always check the terms carefully, as switching bonuses typically require you to switch using CASS and meet minimum deposit requirements within specified timeframes.
Some providers also offer ongoing benefits rather than one-off bonuses. For example, cashback apps like Cheddar can complement your new banking relationship by earning automatic cashback on your spending.
Remember that switching bonuses shouldn't be your only consideration. Factor in ongoing account fees, customer service quality, and banking features that match your needs.
Common problems and how to avoid them
While CASS works smoothly for most customers, understanding potential issues helps you avoid complications during your switch.
Most common switching problems:
- Payments arriving at your old account after the 13-month redirection period ends
- New digital payment services not recognising your account change
- Overdraft arrangements not transferring due to affordability checks
- International payments getting lost during the switch period
How to minimise switching problems:
- Time your switch carefully - avoid switching during busy periods like Christmas or just before major direct debits are due
- Keep some money in your old account temporarily to cover any unexpected payments
- Notify important payees personally - don't rely solely on CASS redirection for critical payments like salary
- Monitor both accounts closely for the first few weeks after switching
Most issues resolve quickly when you contact your new bank's customer service team. Digital banks typically offer superior customer support through in-app chat, while traditional banks may require phone calls or branch visits.
If you experience problems that your bank can't resolve, the Current Account Switch Service has a dedicated complaints process backed by the switching guarantee.
Conclusion
The bank switching service has revolutionised changing current accounts in the UK, transforming what was once a complex manual process into a seamless seven-day automated transfer. With CASS handling everything from direct debits to balance transfers, plus a comprehensive guarantee protecting you throughout the process, there's never been a better time to switch to a bank that better meets your needs.
The key to successful switching is preparation - understanding what CASS covers, choosing the right timing, and manually updating services that fall outside the automatic transfer system. Whether you're attracted by switching bonuses, better customer service, or innovative features from digital banks, CASS removes the traditional barriers to changing your banking relationship.
Take advantage of the competitive UK banking market by exploring what's available beyond your current provider. With proper preparation and the protection of CASS, switching banks can be the first step towards better financial management and potentially significant savings on banking fees and charges.
The information in this article is for educational purposes only and does not constitute financial advice. Always consult a qualified financial adviser before making financial decisions.
Frequently Asked Questions
How long does the bank switching service take to complete?
The Current Account Switch Service (CASS) takes exactly seven working days from start to finish. Some digital banks offer faster switching in 1-2 working days, but the standard CASS timeline is seven working days with your old account closing and your new account becoming active on the seventh day.
What happens if something goes wrong during my bank switch?
The CASS guarantee protects you for 13 months after switching. If anything goes wrong, your new bank must refund any charges, pay any interest lost, and correct mistakes. Contact your new bank first, then escalate to the Financial Ombudsman Service if needed.
Can I switch banks if I have an overdraft?
Yes, CASS will transfer your arranged overdraft balance to your new account, but your new bank must approve the overdraft facility separately. They'll conduct affordability checks and may offer different overdraft terms or limits based on their lending criteria.
Do all UK banks participate in the switching service?
Over 99% of UK current accounts are covered by CASS, including all major high street banks, digital challenger banks, and building societies. You can check if your current and target banks participate on the official Current Account Switch Service website.
Will I lose my direct debits when switching banks?
No, CASS automatically transfers all your direct debits, standing orders, and regular payments to your new account. Your new bank receives 13 months of transaction history to ensure nothing gets missed, and payments are redirected for 13 months if companies haven't updated their records.