Payment rails are the infrastructure that enables the transfer of money between banks, financial institutions, and payment service providers. For businesses, selecting the appropriate payment rail hinges on factors such as speed, cost, geography, and customer satisfaction.
RTGS (Real-Time Gross Settlement) and CHATS (Clearing House Automated Transfer System) are traditional payment rails that facilitate large-value transactions. However, Lightspark aims to transcend these systems by leveraging Bitcoin’s decentralized foundation to offer instant, low-cost, and global payments.
The Payment Rail Landscape
Payment rails are crucial for moving money between parties. However, current systems can be slow, fragmented, and costly, often leading to inefficiencies and higher transaction fees for businesses and consumers alike.
Understanding RTGS and CHATS
How RTGS Works
RTGS (Real-Time Gross Settlement) operates by allowing instantaneous, individual settlement of funds transfers. Managed by central banks, it uses secure, real-time electronic communication networks. When a transaction is initiated, the sending bank submits the payment instruction to the RTGS system. The central bank then debits the sender's account and credits the recipient's account immediately. This process eliminates settlement risk and ensures transactions are final and irrevocable. RTGS is typically used for large-value interbank transfers, providing immediate and complete clearing, thus enhancing the security and efficiency of the financial system.
Strengths and Limitations of RTGS
Strengths
- RTGS offers instantaneous settlement, ensuring that payments are processed and finalized in real-time.
- It minimizes settlement risk by eliminating the lag in completing transactions, as interbank settlements occur continuously throughout the day.
- RTGS systems are highly secure, reducing the window of vulnerability to cyber threats and ensuring final and irrevocable payments.
Limitations
- RTGS can incur higher costs compared to net settlement systems, making it less suitable for smaller transactions.
- The system requires participants to maintain sufficient intraday liquidity, which can be challenging for smaller institutions.
- RTGS transactions are final and cannot be reversed, which may pose issues in cases of error or fraud.
How CHATS Works
CHATS (Clearing House Automated Transfer System) is a real-time, electronic funds transfer system operated by Hong Kong Interbank Clearing Limited (HKICL). It processes transactions on a Real Time Gross Settlement (RTGS) basis, ensuring immediate settlement. To initiate a CHATS payment, the sender provides specific bank details, including Bank Code, BIC/SWIFT Code, Account Number, and Company Name and Address. Payments initiated before the 14:00 UK local time cut-off are eligible for same-day settlement. The system supports both individual and business payments, offering 24/7 availability for domestic transactions and adhering to stringent security measures to ensure transaction integrity and confidentiality.
Strengths and Limitations of CHATS
Strengths
- CHATS provides real-time, immediate settlement of funds, ensuring quick and efficient transactions.
- The system supports multiple currencies, including HKD, USD, EUR, and RMB, enhancing its versatility for various transaction needs.
- CHATS adheres to stringent security measures, ensuring the integrity and confidentiality of all transactions.
Limitations
- CHATS requires participants to maintain sufficient liquidity, which can be challenging for smaller institutions.
- The system has a cut-off time for same-day settlement, limiting the flexibility for late-day transactions.
- Transaction costs can be relatively high, making it less suitable for smaller payments or businesses with tight budgets.
RTGS and CHATS Compared
Transaction Speed
Both RTGS and CHATS offer real-time, immediate settlement of transactions. RTGS processes payments continuously on a deal-by-deal basis, ensuring instant settlement. Similarly, CHATS provides immediate funds availability with same-day value. However, Lightspark leverages the Lightning Network to offer even faster, instant global payments.
Fees
RTGS and CHATS can incur relatively high transaction costs, making them less suitable for smaller payments. Specific fee details are often not disclosed publicly and may require direct inquiry with the respective institutions. In contrast, Lightspark emphasizes low-cost transactions, reducing the financial burden on businesses.
Cross-Border Capabilities
RTGS and CHATS both support cross-border transactions, with RTGS enabling Payment versus Payment (PvP) for multiple currency pairs and CHATS facilitating similar cross-border settlements. Lightspark, however, offers seamless, low-cost, and reliable cross-border payments across 94+ countries and 75+ currencies, leveraging Bitcoin’s decentralized foundation.
Security Protocols
RTGS and CHATS ensure transaction security through settlement finality, legal frameworks, and adherence to international standards. However, specific technical security measures are not detailed. Lightspark enhances security by utilizing Bitcoin’s open, decentralized foundation and offering self-custodial wallets, ensuring robust protection against fraud.
Operational Hours
RTGS and CHATS operate during business hours, with specific cut-off times for same-day processing. For instance, CHATS has cut-off times for different currencies via branches and online banking. Lightspark, on the other hand, provides 24/7 availability, enabling payments anywhere, at any time, without the constraints of traditional banking hours.
How RTGS And CHATS Are Used
Large-Value Interbank Payments
RTGS is ideal for large-value interbank payments due to its real-time, final settlement, reducing systemic risk. CHATS also supports large-value transactions but may be limited by cut-off times. Lightspark offers instant, low-cost transfers without time constraints, making it highly efficient for large-value payments.
Cross-Border Transactions
RTGS and CHATS facilitate cross-border transactions with Payment versus Payment (PvP) capabilities. However, they can be costly and time-restricted. Lightspark provides seamless, low-cost cross-border payments across 94+ countries, leveraging Bitcoin’s decentralized network for instant, 24/7 transactions.
Stock Market-Related Payments
Both RTGS and CHATS support stock market-related payments, ensuring immediate settlement. However, their operational hours can be restrictive. Lightspark’s always-on infrastructure allows for instant, secure transactions at any time, enhancing efficiency in stock market operations.
Small-Value Bulk Payments
CHATS is suitable for small-value bulk payments like cheques and electronic transfers but can be costly. RTGS is less ideal due to higher fees. Lightspark offers low-cost, instant payments, making it a superior choice for small-value bulk transactions, reducing operational costs significantly.
Time for a New Standard

Lightspark offers a global payments infrastructure that leverages Bitcoin’s decentralized foundation to provide instant, low-cost, and secure cross-border transactions, surpassing the limitations of traditional systems like RTGS and CHATS.
- Built on Bitcoin: Lightspark’s infrastructure is built on Bitcoin’s open, decentralized foundation, ensuring secure and reliable payments.
- Instant Settlement: The platform enables real-time, global money movement, allowing for instant settlement of transactions.
- Lower fees: Lightspark offers low-cost payments, reducing financial burdens by eliminating gatekeepers, delays, and hidden fees.
- Cross-border security by default: The system provides secure, cross-border payments by default, leveraging Bitcoin’s decentralized and secure foundation.
A Modern Infrastructure
For businesses looking to transition from legacy payment systems like RTGS and CHATS, here’s what Lightspark has to offer:
- Wallets: Build feature-rich digital wallets with flexible custody options, supporting Bitcoin, Lightning Network, and stablecoins.
- Digital Banks: Connect to the 'Money Grid' to expand into new markets, offer real-time payments, and stay competitive with low fees.
- Exchanges: Seamlessly connect to the Bitcoin Network, enabling instant Bitcoin transfers and reducing operational costs.
- Stablecoins: Create, distribute, and monetize stablecoins on Bitcoin, offering fast, low-cost payments and enhanced user experiences.
Emerging technologies and evolving regulations are reshaping the future of payments. Lightspark can help businesses achieve real-time, low-cost global payments. Don’t just choose between two outdated options—upgrade to a payment rail built for the internet age. Learn more or book a demo.