Bacs payments

A Bacs payment is an electronic transfer between UK bank accounts. It launched in 1968 and later took the name Bankers’ Automated Clearing Services, sometimes written as Bankers’ Automated Clearing System. Today, Bacs is simply a brand name rather than an acronym, and the system is run by Pay.UK.

Where Bacs payments are used

Bacs serves customers of UK banks, building societies, and PSPs. High street banks, building societies, challenger banks, fintechs, and PSPs offer Bacs to individuals, businesses, and charities, connecting either directly or indirectly.

Merchants and PSPs that want to accept payments in the UK should look at Akurateco’s guide to UK payment methods.

How Bacs payments work

Bacs runs two schemes on the same three-day cycle. The first is Bacs Direct Credit, where an organisation sends money out (salaries, supplier payments, refunds), and the second is Direct Debit, where an organisation collects money a payer has authorised in advance (bills, subscriptions).

Bacs Direct Credit

Pay.UK describes Bacs Direct Credit as a regular payment, normally business-to-consumer, that reaches the beneficiary on a set date and is mainly used for wages and salaries. The payer pushes funds out:

1. The business prepares a payment file with each recipient’s name, sort code, account number, amount, and reference.
2. The business, its bank, or a Bacs Approved Bureau submits the file to Bacs.
3. Bacs processes the file and routes each payment to the recipient’s bank.
4. The recipient’s account is credited on the third working day.

Bacs Direct Debit

A Direct Debit is a payment instruction the payer sets up in advance, authorising an organisation to collect varying amounts from their account, normally for regular payments. The payee pulls funds in:

1. The payer completes a Direct Debit Instruction (the mandate) online, by phone, or on paper.
2. The collecting organisation lodges the instruction with the payer’s bank through Bacs.
3. The organisation sends the payer advance notice of the amount and date of each collection.
4. The organisation submits the collection file, and funds leave the payer’s account on the third working day.

How long does a Bacs payment take

A Bacs payment takes three processing days: input day, processing day, and entry day. Bacs only processes on working days. Pay.UK lists Saturdays, Sundays, and English bank and public holidays as non-processing days, so a payment file submitted on a Friday reaches the recipient’s account on Tuesday.

The three-day cycle, as set out in Pay.UK’s Bacs System Principles (version 18, January 2026):

1. Day 1 (input day). The business, its bank, or its bureau sends payments and Direct Debit Instructions to the Bacs system. Files can be submitted up to 30 calendar days before the processing date. If a file can’t be sent in advance, Pay.UK recommends submitting early on the input day, from 07:00.
2. Day 2 (processing day). The banks and PSPs process the payments and instructions they received.
3. Day 3 (entry and settlement day). Banks and PSPs apply payments to customer accounts, and settlement occurs between them. Bacs settlement takes place at 09:30 on each processing day. For Direct Credits, there’s no guaranteed exact arrival time, but at least 90% reach the recipient’s account by 06:00.

If a scheduled payment date falls on a weekend or bank holiday, the payment is made on the next working day.

Bacs Direct Debit for merchants

For merchants with recurring revenue, Direct Debit is the Bacs method that collects payments. Many merchants collect through a Direct Debit provider rather than connecting to Bacs themselves. The provider sets up mandates, submits collections on the three-day cycle, and pays out the funds, and merchants manage it all through an API or dashboard.

Every collection needs a valid Direct Debit Instruction from the payer. The merchant must tell the payer the amount and date of each collection in advance, and give notice of any change to the amount, date, or frequency, normally 10 working days before the debit unless otherwise agreed.

The Direct Debit Guarantee entitles the payer to a full and immediate refund from their bank if a collection is made in error. The bank then reclaims the amount from the merchant, so merchants should keep records of every authorisation.

See the GoCardless payment method page as one example of a Direct Debit provider.

Is a Bacs payment the same as a Direct Debit?

Direct Debit is one of the two Bacs schemes. Every UK Direct Debit is a Bacs payment, but not every Bacs payment is a Direct Debit. On a bank statement, a “BACS” entry that adds money is usually a Direct Credit. A regular bill taken from the account is a Direct Debit.

Bacs vs Faster Payments

The two Pay.UK systems trade speed for cost and scheduling. Faster Payments sends individual payments that usually arrive within seconds, 24/7. Bacs processes files on working days over three days and is typically cheaper per item for large, scheduled runs.

Bacs is used for payroll, supplier runs, and Direct Debit collections, while Faster Payments is used for urgent payouts, off-cycle payments, and refunds.

Merchant requirements and setup basics

Common requirements for Bacs integration:

• Merchant onboarding with standard KYB and KYC checks
• A UK bank account in sterling for collections and payouts
• For Direct Debit: a SUN through a sponsoring bank, or a bureau or provider that submits on the merchant’s behalf
• Scheme-compliant mandate, advance notice, and Direct Debit Guarantee wording
• API keys for the sandbox and production environments
• A webhook endpoint for mandate, collection, unpaid, and indemnity status updates
• Scheduling that works backwards from the payment date, counting only working days
• Testing that covers rejected mandates, unpaid collections, indemnity claims, and rejected files, not only the happy path

Fees, settlement, and refunds overview

Bacs has no scheme-level fee for merchants. Merchants pay whatever their bank, Bacs Approved Bureau, or payment provider charges.

PSPs that connect to Bacs directly pay Pay.UK and Vocalink. According to Pay.UK’s Bacs System Principles, the 2026 charges include:

• A one-off onboarding and certification fee of £75,000 plus VAT
• A Vocalink transaction fee of £0.00924
• A Pay.UK service management fee of £0.00365

Both transaction fees are applied to half of the participant’s combined sent and received volume. Pay.UK notes that the prices are illustrative and may change. PSPs that access Bacs indirectly pay their sponsoring bank’s charges instead.

According to the Bank of England (page updated July 2026), Bacs settles net interbank positions in the RTGS service once each business day. Bacs uses prefunding: settlement participants hold cash in RTGS up to a cap on their net obligations, so settlement can complete even if a participant defaults.

A merchant refunds a Bacs payment by sending a new outbound payment, either by Bacs Direct Credit or by Faster Payments. Under the Direct Debit Guarantee, a customer can also get a mistaken Direct Debit refunded by their own bank, which then claims the amount back from the merchant through a Direct Debit Indemnity Claim.

Pros and cons of Bacs Payments

Pros:

• Low cost per payment for high-volume runs such as payroll and recurring billing
• Reaches the customers of UK banks, building societies, and PSPs
• Direct Debit lets merchants collect recurring payments without the customer acting each time
• The fixed three-day cycle makes arrival dates predictable for scheduled payments
• The Direct Debit Guarantee gives payers confidence to sign up

Cons:

• Three working days, with no processing at weekends or on bank holidays
• Not suited to urgent or one-off payments
• The Direct Debit Guarantee sets no time limit for refund claims, so revenue is not final on the day it arrives
• Setup overhead: SUN, sponsoring bank, approved software, or a bureau or provider
• Domestic sterling only; it does not cover cross-border payments

Using Bacs in a multi-method checkout

Merchants and PSPs run Bacs alongside cards, pay by bank, and digital wallets, often through several providers with different status events, return codes, and reports. Bacs also brings its own reporting layer.

A payment orchestration platform centralises payment monitoring and reporting. Teams can compare performance across methods and providers, investigate unpaid collections and rejected submissions, and maintain consistent reconciliation without switching between admin panels.

Integration via Akurateco

Akurateco helps merchants, PSPs, and financial institutions expand payment coverage through one orchestration layer with 700+ integrations. Bacs can be enabled through a single integration on request. Reach out to confirm options.

Note: Akurateco provides the gateway and orchestration layer on top of acquirers and does not process transactions itself.

FAQs about Bacs payments

What does Bacs stand for?

Bacs originally stood for Bankers’ Automated Clearing Services, a name adopted in 1971. It is also sometimes referred to as the Bankers’ Automated Clearing System. Today Bacs is used as a name rather than an acronym, and the system is run by Pay.UK.

How long does a Bacs payment take?

Three working days. Submission goes on day one, processing on day two, and funds in the account on day three, with most Direct Credits arriving by 06:00. Weekends and bank holidays extend the timeline.

How do I make a Bacs payment?

Businesses send Bacs payments by submitting a payment file through their bank’s Bacs service, a Bacs Approved Bureau, or a payment provider. Each payment needs the recipient’s name, sort code, account number, amount, and reference.

Is Bacs the same as Direct Debit?

No. Direct Debit is one of the two Bacs schemes. The other is Bacs Direct Credit, which businesses use to pay salaries, suppliers, and refunds.

Is a Bacs payment safe?

Yes. Bacs runs under Pay.UK’s scheme rules, and every organisation that collects Direct Debits is vetted by the banks before it can collect. Payers are protected by the Direct Debit Guarantee, which entitles them to an immediate refund from their bank if a collection is made in error.