A SaaS cloud-based banking system is a software platform delivered over the internet on a subscription basis, in which the provider hosts, maintains, and updates the system infrastructure, and the financial institution accesses it through a browser or API connection. For payment institutions and e-money institutions evaluating their technology options, the primary decision is not which SaaS platform to select but whether to use a SaaS platform at all, as the alternative is building and maintaining a proprietary core banking system in-house. This article sets out the key advantages of the SaaS model and the practical reasons why in-house development is rarely the more efficient or cost-effective path for regulated payment institutions and e-money institutions.
As illustrated in a typical SaaS core banking deployment, a payment institution connects to the provider’s cloud-hosted platform via API and web interface. The provider’s infrastructure manages transaction processing, data storage, security monitoring, regulatory update deployment, and system availability. The institution configures the platform to reflect its product set, customer onboarding requirements, and reporting obligations, and connects it to the payment networks and third-party tools it requires. New regulatory requirements, such as updated reporting formats or revised AML rules, are deployed by the provider across the platform, rather than requiring the institution to commission bespoke development work on its own codebase.
Key Takeaways: #
- SaaS (Software-as-a-Service) cloud-based banking systems replace the upfront capital investment and ongoing infrastructure costs of building or maintaining a proprietary system with a subscription-based model, enabling financial institutions to launch faster and scale more efficiently;
- For payment institutions and e-money institutions, SaaS cloud-based banking systems offer pre-built regulatory compliance capabilities, including AML and KYC workflows, safeguarding reporting, and open banking API infrastructure, reducing the time and cost of meeting PSD2, DORA, and AML obligations;
- The primary alternative to a SaaS cloud-based banking system is building a proprietary platform in-house, which requires sustained capital investment, specialist technology talent, and an ongoing commitment to regulatory updates that most payment institutions and e-money institutions are not positioned to maintain cost-effectively.
The Seven Key Advantages of a SaaS Cloud-Based Banking System #
- Cost efficiency and predictable expenditure: Building a proprietary core banking system requires substantial upfront capital investment in software development, infrastructure, security architecture, and regulatory compliance engineering. Ongoing costs include system maintenance, security patching, infrastructure management, and the dedicated technical staff required to support all of these functions. A SaaS cloud-based banking system replaces this cost structure with a predictable subscription fee that covers infrastructure, maintenance, security, and regulatory updates. This allows payment institutions and e-money institutions to direct resources towards customer acquisition, product development, and business growth rather than technology infrastructure.
- Faster time to market: A SaaS cloud-based banking system is pre-built and ready for configuration, meaning that a payment institution or e-money institution can deploy a fully functional core banking environment in a fraction of the time required to build a proprietary system from scratch. For institutions seeking to obtain a payment institution or e-money institution licence, the availability of a compliant core banking system is a prerequisite for the licence application. Using a SaaS cloud-based banking system significantly reduces the technology development timeline that would otherwise delay the licence application and market entry.
- Scalability and flexibility: SaaS cloud-based banking systems are built on cloud infrastructure that scales elastically in response to transaction volumes and user growth, without requiring the institution to invest in additional hardware or infrastructure capacity. As a payment institution or e-money institution grows its customer base, expands into new payment products, or enters new markets, the platform scales to accommodate the increased demand. SaaS providers typically offer tiered subscription structures that allow institutions to adjust their usage and feature set as their requirements evolve.
- Regulatory compliance and updates: SaaS cloud-based banking systems serving payment institutions and e-money institutions invest continuously in maintaining the compliance capabilities of their platforms, including regulatory reporting templates, AML and KYC workflows, open banking API standards, and safeguarding reporting functions. When regulatory requirements change, such as updates to EBA technical standards, new AML directive requirements, or revised reporting formats from the FCA, the provider deploys the necessary updates across the platform. Institutions using a proprietary system must commission and fund these updates independently, bearing the full cost and risk of implementation.
- Security and data protection: SaaS cloud-based banking systems implement enterprise-grade security infrastructure across their platforms, including data encryption at rest and in transit, role-based access controls, multi-factor authentication, continuous security monitoring, and regular penetration testing. For payment institutions and e-money institutions subject to DORA, which requires institutions to demonstrate digital operational resilience and manage ICT third-party risk systematically, using a SaaS cloud-based banking system with documented security controls and contractual resilience commitments can form part of the institution’s DORA compliance framework. The provider’s security certifications, audit reports, and incident response procedures should be assessed as part of the ICT third-party risk management process.
- Integration capabilities: Modern SaaS cloud-based banking systems are built on API-first architectures that enable integration with payment networks, open banking infrastructure, card issuance platforms, identity verification tools, currency exchange providers, and third-party compliance systems. This integration capability is a prerequisite for payment institutions and e-money institutions that must connect to SEPA payment schemes, Faster Payments, SWIFT, or card networks, and that must provide a PSD2-compliant open banking API to authorised TPPs. Building equivalent integration capabilities into a proprietary system requires sustained development investment and ongoing maintenance as network standards and API specifications evolve.
- Focus on core business activities: By outsourcing the technology infrastructure layer to a SaaS cloud-based banking system, payment institutions and e-money institutions can concentrate their internal resources on the activities that directly drive business value, including product development, customer acquisition, relationship management, and strategic growth. The provider manages system availability, security monitoring, regulatory updates, and infrastructure maintenance, reducing the technology management burden on the institution’s leadership and operational teams.
Operational Efficiency Benefits #
Beyond the seven primary advantages, SaaS core banking systems deliver a set of operational efficiency benefits that compound over time as the institution grows.
Automated workflows and process efficiency: SaaS platforms automate repetitive operational processes, including transaction reconciliation, regulatory report generation, AML alert triage, and customer onboarding workflows. Automation reduces manual processing effort, lowers the risk of human error, and frees operational staff to focus on higher-value activities.
Centralised data and reporting: All transaction data, customer records, and compliance events are held within a single, centralised system, providing a consistent source of financial truth for management reporting, regulatory submissions, and audit purposes. This eliminates the data reconciliation effort associated with maintaining multiple disconnected systems and ensures that all reports are generated from the same underlying data set.
Continuous availability and resilience: SaaS providers operate their platforms with defined uptime commitments and redundant infrastructure, ensuring that core banking services remain available around the clock. For institutions operating on real-time payment rails such as Faster Payments or SEPA Instant, continuous system availability is an operational necessity. SaaS providers typically offer service level agreements that define uptime guarantees and incident response obligations, providing the institution with contractual recourse in the event of service degradation.
Seamless updates and maintenance: Software updates, security patches, and regulatory changes are deployed by the provider without requiring planned maintenance windows or service interruptions on the institution’s side. This ensures that the institution always operates on the current version of the platform, with the latest security controls and compliance capabilities in place, without the disruption and risk associated with major update cycles on a proprietary system.
FAQ: #
What are the risks of building a proprietary core banking system instead of using a SaaS platform?
- Building a proprietary core banking system requires sustained capital investment in software development, security architecture, and regulatory compliance engineering over the full lifetime of the system. The institution bears the full cost and risk of adapting the system to new regulatory requirements, which for payment institutions and e-money institutions include PSD2 open banking obligations, DORA ICT resilience requirements, evolving AML technical standards, and updated reporting formats from national competent authorities. The institution also bears the operational risk of system outages, security incidents, and technology obsolescence without the support of a dedicated provider. For most payment institutions and e-money institutions, the total cost of building and maintaining a proprietary system over a five to ten year horizon significantly exceeds the cost of a SaaS subscription.
What should payment institutions and e-money institutions look for in a SaaS core banking provider?
- The most important criteria are regulatory compliance capability, including support for safeguarding reporting, AML and KYC workflows, open banking API provision, and the specific reporting formats required by the institution’s national competent authority. The provider’s approach to DORA compliance, including their contractual commitments on resilience, audit rights, data location, and exit rights, should be assessed as part of the ICT third-party risk management process. The provider’s track record of delivering regulatory updates in a timely manner, their API connectivity to the relevant payment networks, and their data security certifications are also important selection criteria. Institutions should also assess the provider’s financial stability and long-term viability, as dependency on a SaaS provider creates concentration risk that must be managed in accordance with the institution’s ICT third-party risk framework.
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