Payment rails are the infrastructure that enables the transfer of money between banks, payment service providers, and other financial institutions. For businesses, choosing the right payment rail depends on factors like speed, cost, geography, and customer satisfaction.
BACS (Bankers' Automated Clearing Services) and SEPA (Single Euro Payments Area) are two prominent payment rails. BACS is used in the UK for direct debits and credits, while SEPA facilitates euro-denominated payments across Europe. Lightspark is moving past these traditional rails by developing the 'Money Grid', a global, open payments network built on Bitcoin’s decentralized foundation.
The Payment Rail Landscape
Payment rails are crucial for transferring money between parties. However, current systems can be slow, fragmented, and costly, often leading to inefficiencies and higher expenses for businesses and consumers alike.
Understanding BACS and SEPA
How BACS Works
BACS (Bankers’ Automated Clearing System) operates by processing direct debit and direct credit transactions in the UK. It uses electronic batch processing to transfer funds between bank accounts, typically taking up to three business days. The process involves submitting payment instructions, verifying recipient details (name, bank, account number, sort code), and batch processing the transactions. Established in 1968, BACS automates the previously manual check clearing process, relying on secure data transmission between banks. A typical transaction flows from the payer or payee initiating a payment, submission to BACS, batch processing, and eventual fund transfer between accounts.
Strengths and Limitations of BACS
Strengths
- BACS is cost-effective, with transaction fees ranging from £0.05 to £0.50, making it ideal for businesses processing large volumes of payments.
- It is a well-established and reliable system, having been in operation for over 54 years and widely trusted for recurring and bulk transactions.
- BACS supports both direct debit and direct credit transactions, making it versatile for various payment needs such as payroll, utility bills, and memberships.
Limitations
- BACS transactions can take up to three business days to clear, making it unsuitable for urgent payments.
- It is limited to UK-only transactions and cannot be used for international payments.
- Most payment requests must be sent before 17:00 to be processed the next day, adding a layer of timing complexity.
How SEPA Works
SEPA (Single Euro Payments Area) standardizes euro (EUR) bank transfers across the Eurozone, EU countries, and some additional nations, making cross-border transfers equivalent to domestic ones. The process involves initiating a EUR transfer from a sender's account in one SEPA country to a recipient's account in another. The sender's bank processes the transfer, which typically arrives within 1–2 working days. SEPA relies on standardized banking infrastructure and EU regulations to ensure cost-effective, efficient transactions. While most transfers incur no extra fees, some banks may still charge for receiving payments.
Strengths and Limitations of SEPA
Strengths
- SEPA enables fast and cost-effective euro transfers across Europe, often completing transactions within 1–2 working days.
- It provides a domestic-like experience for cross-border payments, ensuring uniformity in speed and cost across SEPA countries.
- SEPA Instant allows for near-instantaneous transfers, available 24/7, provided both banks are part of the SEPA Instant network.
Limitations
- SEPA is restricted to euro-denominated payments, making it unsuitable for transactions in other currencies.
- Not all European financial institutions have adopted SEPA Instant, limiting the availability of instant transfers.
- SEPA transfers are limited to participating countries, excluding global transactions outside the SEPA area.
BACS and SEPA Compared
Transaction Speed
BACS transactions typically take up to three business days to process, making it one of the slower UK payment options. In contrast, SEPA standard transfers usually take 1–2 business days, with SEPA Instant offering near-instantaneous transfers available 24/7. Lightspark provides real-time, instant money movement, surpassing both BACS and SEPA in speed.
Fees
BACS is known for its low transaction fees, ranging from £0.05 to £0.50, making it cost-effective for high-volume payments. SEPA transfers are also inexpensive, often costing under €5 or even free. Lightspark emphasizes low-cost transactions, offering payments at a fraction of traditional costs.
Cross-Border Capabilities
BACS is limited to domestic UK transactions and does not support cross-border payments. SEPA, however, facilitates euro-denominated transfers across 38 countries in Europe, including the UK post-Brexit. Lightspark excels in global money movement, supporting 140+ countries and 120+ currencies.
Security Protocols
Both BACS and SEPA are regulated and secure, but specific security protocols are not detailed. BACS operates under Pay.UK, while SEPA is managed by the European Commission and the European Central Bank. Lightspark leverages Bitcoin’s decentralized foundation, offering robust security through blockchain technology.
Operational Hours
BACS operates on business days with cut-off times, typically processing transactions within three business days. SEPA Instant is available 24/7, while standard SEPA transfers depend on business hours. Lightspark’s infrastructure is "always on," enabling 24/7 real-time payments.
How BACS And SEPA Are Used
Payroll Processing
BACS is ideal for UK payroll due to its low cost and support for recurring payments. SEPA is better for euro-denominated payroll across Europe, offering faster processing. Lightspark excels by enabling instant, low-cost global payroll, eliminating delays and reducing operational costs.
Supplier Payments
BACS suits UK-based supplier payments with its cost-effectiveness for bulk transactions. SEPA is preferable for euro payments to European suppliers, ensuring quick transfers. Lightspark offers real-time, cross-border payments, enhancing cash flow management and reducing transaction fees.
Utility Bill Payments
BACS is commonly used for UK utility bills due to its support for direct debits. SEPA is suitable for euro-denominated utility payments across Europe. Lightspark provides instant, low-cost payments, ensuring timely bill settlements and avoiding late fees.
Cross-Border Business Transactions
SEPA facilitates euro-denominated cross-border transactions within Europe efficiently. BACS is not suitable for international payments. Lightspark offers a superior solution with instant, low-cost global transactions, supporting multiple currencies and enhancing international business operations.
Time for a New Standard

Lightspark is a global payments infrastructure provider that enables real-time, cross-border money movement for Bitcoin, fiat, and stablecoins, offering faster, more cost-effective, and secure transactions compared to BACS and SEPA.
- Built on Bitcoin: Lightspark’s infrastructure is built on Bitcoin’s open, decentralized foundation, leveraging the Bitcoin Lightning Network for instant, low-cost transactions.
- Instant Settlement: Lightspark enables instant settlement of payments, allowing money to move in real time across borders and currencies, supporting 24/7 payments.
- Lower fees: The platform facilitates payments at a fraction of today’s costs, with no hidden fees, reducing the cost of cross-border and domestic transactions.
- Cross-border security by default: Lightspark’s infrastructure ensures secure, cross-border payments by default, built on Bitcoin’s decentralized and secure foundation, with built-in compliance features.
A Modern Infrastructure
For businesses looking to transition from outdated payment systems like BACS and SEPA, here’s what Lightspark brings to the table:
- Wallets: Lightspark's Wallets solution allows businesses and developers to build advanced digital wallets with flexible custody options, supporting Bitcoin, Lightning, stablecoins, and domestic payment rails.
- Digital Banks: Lightspark enables digital banks to connect to the 'Money Grid,' offering real-time, low-fee payments and global reach, helping them stay competitive and unlock new markets.
- Exchanges: Lightspark's solution for cryptocurrency exchanges facilitates instant Bitcoin transfers, lowers operational costs, and integrates seamlessly with compliance tools.
- Stablecoins: Through Spark, businesses can create, distribute, and monetize stablecoins on the Bitcoin network, enabling fast and cost-effective financial applications.
Emerging technologies and evolving regulations are reshaping the future of payments. Lightspark offers real-time, low-cost global payments, bridging traditional and next-gen systems. Don’t just choose between two outdated options—upgrade to a payment rail built for the internet age. Learn more or book a demo.