What is a BACS Payment?
A BACS payment is one of the most common ways money moves between UK bank accounts, yet most business owners who send or receive them every day have only a vague sense of what BACS actually is. If you have ever wondered why your salary takes three days to land, or why a Direct Debit has a fixed collection date rather than going through instantly, the answer is the BACS system. This guide explains what a BACS payment is, how it works, the two types, and how it compares to Faster Payments and CHAPS.
What is a BACS payment?
A BACS payment is an electronic bank-to-bank transfer between UK accounts, processed through the BACS system and run by Pay.UK. It covers both Direct Debits and Direct Credits.
It is the UK's oldest and largest electronic payment system, used by businesses, government bodies and banks to send and collect money without cash, cheques or cards. To put its scale in context, BACS processed 6.81 billion payments worth nearly £6 trillion in 2024. A BACS payment is a type of bank transfer, but not every bank transfer is a BACS payment, which is a distinction worth holding onto.
What does BACS stand for?
BACS stands for Bankers' Automated Clearing Services. It was founded in 1968 to replace the slow, manual process of writing and posting cheques, and became part of Pay.UK in 2018.
It is now operated by Bacs Payment Schemes Limited, a subsidiary of Pay.UK, the body that runs much of the UK's payments infrastructure. In short, it is long-established, heavily regulated and trusted, which is exactly why it underpins so much routine business payment activity.
How does a BACS payment work?
BACS runs on a fixed three-working-day cycle. Day one is submission, day two is processing, and day three is when the funds reach the recipient's account.
The system operates on weekdays only, roughly 7am to 10:30pm, and does not run on weekends or bank holidays. Payments must be submitted before a daily cut-off, usually mid to late afternoon, to enter that day's cycle. On the clearing day the money typically arrives early, with around 90% of Direct Credit payments landing by about 6am. Because BACS works as a batch system, once a file is submitted and past the cut-off it is very difficult to amend or cancel.
What are the two types of BACS payment?
There are two: Direct Debit, where a business collects agreed payments from a customer, and Direct Credit, where money is pushed into an account.
| Type | What it does | Common examples |
|---|---|---|
| Direct Debit | Lets a business collect payments from a customer's account on agreed dates, with their prior authorisation | Utility bills, subscriptions, memberships, insurance |
| Direct Credit | Pushes money from one account into another, initiated by the sender | Salaries, pensions, supplier payments, refunds |
Direct Debit is protected by the Direct Debit Guarantee, which entitles a customer to an immediate refund from their bank if a payment is taken in error. Direct Credit is how the majority of UK payroll is paid, with around eight in ten employees receiving wages this way.
How long does a BACS payment take?
A standard BACS payment takes three working days from submission to the money being credited. Weekends and bank holidays extend that timeline.
A simple example: a payment submitted on a Friday will not clear until the following Tuesday, because Saturday and Sunday are not working days. For payroll, that means salaries due on a Friday need to be submitted by the end of the previous Tuesday. It is reliable and predictable rather than fast, which is the whole point of it.
BACS vs Faster Payments vs CHAPS
BACS is the slow, low-cost workhorse for planned payments. Faster Payments are near-instant for everyday transfers, and CHAPS is same-day for high-value, time-critical ones.
| Method | Speed | Best for | Cost |
|---|---|---|---|
| BACS | 3 working days | Payroll, supplier payments, Direct Debits | Pennies |
| Faster Payments | Near-instant, up to 2 hours | Everyday and one-off transfers | Usually free |
| CHAPS | Same working day | High-value or urgent payments | Around £20 to £35 |
One reason the three get confused is that online banking rarely tells you which rail it is using, grouping them all under "bank transfer." The setup can look identical while the settlement time differs significantly. This is also a useful contrast with card payments: where BACS settles in three days, look for next-day settlement on your card takings so money reaches you faster.
How much does a BACS payment cost?
BACS is one of the cheapest ways to move money, usually costing only pennies per transaction, and you are not charged to receive one.
That low cost is exactly why businesses lean on it for high-volume, predictable payments like payroll and supplier runs. By comparison, CHAPS can cost £20 to £35 per transfer, which makes it impractical for anything but high-value or genuinely urgent payments.
How does a business set up BACS?
To send BACS payments, a business needs a Service User Number, a six-digit identifier obtained either through your bank or a BACS-approved bureau.
Larger payers often use BACS-approved software that integrates with their accounting or payroll system to submit payment files directly using their SUN. Smaller businesses that cannot get a SUN directly sometimes use a bureau service that submits on their behalf. It is worth knowing that applying through a bank can take time, so it is not an overnight setup. BACS only works between UK accounts, so it cannot be used for international payments.
Where BACS fits for a small business
BACS is the engine behind your scheduled, predictable money: paying staff and suppliers, and collecting recurring customer payments. It is rarely the right choice for anything urgent.
Used well, it keeps administration low and cash flow predictable, while Faster Payments or CHAPS cover the moments speed matters. It is one piece of a wider payments picture that also includes how you take money from customers, whether that is by card, over the phone or online. Our guides on cash vs card and how to accept card payments cover that side of things.
BACS payments: FAQs
What does BACS stand for?
Bankers' Automated Clearing Services. It is the UK's long-standing system for electronic bank-to-bank payments, run by Pay.UK, and it handles both Direct Debits and Direct Credits.
How long does a BACS payment take?
Three working days. It follows a fixed cycle: submitted on day one, processed on day two, and credited to the recipient on day three, usually by early morning. Weekends and bank holidays extend it.
What is the difference between BACS and a Faster Payment?
A Faster Payment is near-instant and suits one-off or urgent transfers, while BACS takes three working days and suits planned, recurring payments like payroll. A BACS payment is a bank transfer, but not every bank transfer is BACS.
Can a business pay staff by BACS?
Yes, and most do. BACS Direct Credit processes the majority of UK payroll, with around eight in ten employees paid this way.
How does a business set up BACS?
You need a Service User Number, a six-digit ID, obtained through your bank or a BACS-approved bureau. Many businesses use BACS-approved software to submit their payment files.
Can a BACS payment be cancelled?
Once submitted and past the daily cut-off, BACS payments are batched and very difficult to reverse. If you spot an error before the cut-off on day one, some banks let you stop the file.
Getting to grips with how money moves through your business? Understanding what you pay to take card payments is a good place to start. Get a free, no-obligation statement review and we will show you exactly where you stand.
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