What Is BACS?
BACS (Bankers’ Automated Clearing Services) is the UK’s oldest and largest payment system for electronic bank-to-bank transfers. It is operated by Pay.UK and is used by businesses, government bodies, and financial institutions to make and collect payments electronically without using cash, cheques, or cards.
BACS processes two main types of payments:
- BACS Direct Credit: Used to send payments to individuals or businesses. It is commonly used for payroll salaries, pension payments, and benefit payments in the UK.
- BACS Direct Debit: Used to collect payments from bank accounts with the account holder’s prior authorisation. It is commonly used for mortgage payments, utility bills, insurance premiums, and subscriptions.
Together, BACS Direct Credits and Direct Debits account for billions of transactions each year, making BACS an important part of the UK’s financial infrastructure.
How Does the BACS Payment Process Work?
The BACS process operates on a fixed three-working-day cycle.
| Day | Activity |
|---|---|
| Day 1 – Input Day | The payment originator, such as an employer or utility company, submits the BACS file to its bank. |
| Day 2 – Processing Day | BACS processes the payment file and the funds are debited from the originator’s bank account. |
| Day 3 – Entry Day | The funds are credited to the recipient’s bank account. |
This three-day cycle is particularly important for payroll teams. Employers must work backwards from the intended payday to make sure their BACS payment file is submitted on time.
Bank holidays can also affect the processing timetable because BACS operates on working days.
BACS and UK Payroll Processing
BACS Direct Credit is widely used by UK businesses to pay employees.
Key payroll considerations include:
- Payroll software such as Xero Payroll, Sage Payroll, QuickBooks Payroll, and BrightPay can generate BACS-compatible payment files.
- Payroll bureaux can submit BACS files on behalf of employers.
- Larger employers may have their own BACS Service User Number (SUN).
- Smaller employers may process payroll through their business banking platform.
- HMRC Real Time Information (RTI) submissions must generally be made on or before the payment date.
- Employers need to consider bank holidays when planning payroll submission dates.
What Is BACS Direct Debit?
BACS Direct Debit allows businesses to collect payments automatically from customers’ bank accounts on agreed dates.
It is commonly used for:
- Mortgage payments
- Utility bills
- Insurance premiums
- Subscription services
- Other recurring payments
The customer first provides authorisation through a Direct Debit Mandate. The business then submits the collection instructions through the BACS system.
If a payment fails because of insufficient funds, a cancelled mandate, or another reason, the business receives notification through the relevant BACS return process.
How Does BACS Direct Debit Work?
The process generally works as follows:
- The customer signs a Direct Debit Mandate authorising the business to collect payments.
- The business submits the collection instructions to BACS.
- The payment is processed according to the BACS timetable.
- The agreed amount is debited from the customer’s bank account.
- If the collection fails, the business receives an appropriate return notification.
The Direct Debit Guarantee also provides protection to customers where a payment is collected incorrectly.
BACS vs Faster Payments vs CHAPS
| Feature | BACS | Faster Payments | CHAPS |
|---|---|---|---|
| Speed | 3 working days | Usually near-instant | Same working day if submitted before the cut-off |
| Maximum value | No practical limit | Varies by bank | No limit |
| Cost | Generally low | Often free for consumers | Usually higher |
| Best for | Payroll, bulk payments, Direct Debits | Everyday bank transfers | High-value transfers |
| 24/7 availability | No | Yes | No |
The main difference is speed. BACS is designed for scheduled and batch payments, while Faster Payments is designed for faster transfers and CHAPS is commonly used for high-value same-day payments.
What Time Do BACS Payments Arrive?
BACS payments are credited to the recipient’s account on Day 3 of the BACS processing cycle.
The exact time depends on the recipient’s bank. Many UK banks make BACS payments available during the early hours of the payment date.
For this reason, employees will often find that their salary is available in their account when they check it on payday morning.
Do BACS Payments Process on Weekends?
No. BACS operates on banking working days rather than weekends and UK bank holidays.
For example, if a payment enters the BACS cycle on a Friday, the following working days are used for processing. Weekends and bank holidays can therefore extend the time before the recipient receives the money.
Employers should take these non-working days into account when planning payroll.
What Happens If a BACS Payment Is Rejected?
A BACS payment may be rejected or returned if the recipient’s bank details are incorrect, the account has been closed, or another payment issue occurs.
The originator is notified through the relevant BACS reporting process.
For Direct Debits, an ARUDD (Automated Return of Unpaid Direct Debits) report may be generated. Other BACS payment issues can generate different return or amendment reports.
If you notice that a payment has been rejected, the bank details should be checked before attempting the payment again.
BACS and HMRC Tax Payments
BACS is also used in some HMRC and government payment situations.
For example:
- HMRC can use BACS Direct Credit to pay certain tax refunds into bank accounts.
- State Pension payments can be made through BACS Direct Credit.
- Many DWP benefit payments are processed through BACS.
- Employers use banking systems to make PAYE-related payments, although Faster Payments and CHAPS are also commonly used for HMRC payments where speed is important.
The exact processing time for an HMRC payment or refund depends on the type of payment and the method used.
How Long Does a BACS Payment Take?
A standard BACS payment takes three working days from submission through the BACS cycle to the recipient’s account being credited.
Weekends and bank holidays are not included as BACS processing days, so they can extend the overall calendar time.
Is BACS the Same as a Bank Transfer?
Not exactly.
Bank transfer is a general term that can refer to several payment methods, including:
- BACS
- Faster Payments
- CHAPS
- International bank transfers
BACS is therefore a specific UK payment system rather than a general name for every type of bank transfer.
Can You Reverse a BACS Payment?
Once a BACS payment has been submitted for processing, it cannot normally be reversed instantly.
If you have made an incorrect payment, contact your bank as soon as possible. The bank may be able to contact the receiving bank and attempt to recover the funds, but recovery is not guaranteed.
Acting quickly gives you the best chance of resolving an incorrect BACS payment.
Frequently Asked Questions About BACS Payments
How long does a BACS payment take?
A standard BACS payment takes three working days to complete, although weekends and bank holidays can affect the overall calendar timeframe.
Is BACS faster than Faster Payments?
No. Faster Payments are generally much quicker because they are designed for near-instant transfers, whereas BACS uses a three-working-day processing cycle.
Is BACS used for salaries?
Yes. BACS Direct Credit is widely used by UK employers to pay employee salaries.
Is BACS used for Direct Debits?
Yes. BACS Direct Debit is used by businesses to collect authorised payments from customers’ bank accounts.
Can a BACS payment be cancelled?
Once a payment has entered processing, cancellation or recovery may be difficult. If you have made a mistake, contact your bank immediately.
Does BACS work on weekends?
No. BACS processes payments on working days, so weekends and bank holidays can affect payment dates.