ISO/IEC 27001 by industry
ISO/IEC 27001 for banking, fintech and financial services: an ISMS for regulators, partner banks and the board
Clause by clause: ISO/IEC 27001:2022 requirements: every clause explained →
What changes when the ISMS belongs to a bank, payment firm, fintech, insurer or asset manager: who asks for the certificate, what belongs in scope, where auditors sample and how it sits beside DORA, SAMA CSF, PCI DSS and other sector rules.
Key points
- In financial services the certificate is rarely asked for by the regulator itself. It is asked for by bank procurement, correspondent partners, payment schemes' onboarding teams and institutional investors reviewing a fintech's due diligence pack.
- A bank, insurer or payment firm must decide early whether the scope covers core banking, card and payment switching, digital channels and the outsourced data centre, or only a corporate function; a narrow scope rarely satisfies a prudential examiner.
- Auditors spend their sampling time on third-party and ICT supply chain oversight, privileged access to payment and core systems, logging and monitoring, continuity readiness and threat intelligence.
- ISO/IEC 27001 does not discharge technology risk rules such as DORA, the SAMA CSF or MAS TRM; one well-run ISMS supplies much of the evidence they ask for.
Why banks, fintechs and insurers pursue ISO/IEC 27001
Supervised institutions face technology risk expectations from their central bank or prudential regulator and want an internationally recognised framework to organise their controls against. Pressure also comes from outsourcing and third-party risk teams, which ask every significant technology provider, card processor, cloud host and collections agency for independent assurance before a contract is renewed. And fintechs that want to sit inside a bank's product find the certificate on the partner bank's onboarding checklist long before revenue.
Boards add a fourth driver. Directors who approve a risk appetite for cyber and fraud want to see that information security is governed, measured and reported to them, not left to IT. A risk register, owners and management review give them that view. For the wider question of whether certification fits your organisation, see Do you need ISO/IEC 27001? A decision guide for boards and security leads.
What the scope covers in a financial institution
A credible scope follows the customer's money and data. For a bank that means core banking, the payment switch and its links to card schemes and clearing systems, internet and mobile banking, the customer data platform, treasury and trade systems, and the operations centres that run them. Insurers add policy administration and claims; asset managers add order management.
Three mistakes recur. The first is certifying the head-office IT department while card operations or a managed data centre stay outside, which a partner bank's reviewer notices at once. The second is treating the core banking vendor or cloud provider as out of scope when the institution still owns configuration, access and data on it. The third, common in fintechs, is scoping the product but not the customer support and fraud operations teams who can see account data. The general rules are in ISO/IEC 27001 scope: boundaries, interfaces and the mistakes that cost you.
Where Annex A carries weight for financial services
Controls are chosen through your own risk assessment, but in finance the same Annex A areas attract most of the audit time.
| Annex A area | What it means in a financial institution | Evidence the auditor samples |
|---|---|---|
| A.5 Supplier relationships and the ICT supply chain | Outsourced core banking, cloud hosting, card processing and data vendors assessed and monitored for security in proportion to the functions they support | Supplier inventory ranked by criticality, due-diligence files, security clauses and exit terms in contracts, periodic reviews of providers' certificates and assurance reports |
| A.5 ICT readiness for business continuity | Payment and core systems able to recover within the tolerances the business and its regulator expect | Recovery objectives per critical service, disaster recovery test reports with issues closed, failover records for payment channels |
| A.5 and A.8 Access control and privileged access | Who can approve payments, change limits, reach production databases and administer the switch, with segregation of duties | Joiner, mover and leaver records, quarterly access recertifications, privileged session logs, maker-checker settings in core systems |
| A.8 Logging and monitoring activities | Detecting account takeover, insider misuse and abnormal transactions across channels | Log sources feeding the security operations centre, alert tuning records, incident tickets linked to fraud cases, retention settings |
| A.5 Threat intelligence | Knowing which campaigns target banks, payment firms and their customers, and acting on it | Feeds and sector sharing subscriptions, analysis notes, changes made to controls or detection rules as a result |
All four control themes are covered in Annex A: the 93 controls by theme, explained.
Working alongside financial-sector regulation
None of the rules below is satisfied by a certificate alone. What an ISMS does is give one risk method, one policy set and one evidence calendar that each regime can draw on. Each has its own page on this site:
- DORA: the EU regulation on ICT risk, incident reporting, resilience testing and third-party risk for financial entities.
- SAMA CSF: the Saudi Central Bank's cyber security framework, assessed by maturity level.
- PCI DSS: the card industry's data security standard, validated each year for anyone handling cardholder data.
- MAS TRM: the Monetary Authority of Singapore's technology risk management guidelines and related notices.
- APRA CPS 234: the Australian prudential standard on information security.
- RBI and SEBI cybersecurity frameworks: the Indian central bank's and securities regulator's technology risk rules.
What a financial-services engagement looks like
Duration turns on the number of critical systems in scope, how many outsourced providers support them, whether a security operations centre already exists and how quickly the risk committee takes decisions. The CISO, chief risk officer, heads of payments and operations, procurement and the outsourcing owner must be involved. With Design™, Sterling guides your security and risk teams to build and own the ISMS; with Drive™, Sterling carries more of the documentation, supplier assessments and evidence preparation while your people run the bank.
How Sterling works with financial institutions
One ISMS your board, your partners and your examiners can all read.
Our expert and experienced consultants build the risk method around your risk appetite, map controls to your core, payment and digital systems, assess critical suppliers and keep the evidence in Effivity, included with the engagement, at no additional cost. Sterling does not certify; an independent, accredited certification body audits and decides. We ensure successful certification for our clients.
Book a free discovery callISO/IEC 27001 for banking and fintech: questions buyers ask
Will ISO/IEC 27001 certification satisfy our central bank's technology risk requirements?
No, not on its own. It supplies governance, risk and control evidence that regulators recognise, but each regulator's own rules, reporting duties and inspections still apply and must be mapped separately.
Our partner bank asks for ISO/IEC 27001 before onboarding our fintech. What scope will they accept?
Usually the product and every team and system that touches the bank's customers or data, including support, fraud operations and the cloud accounts. A certificate covering only a corporate office rarely passes their review.
Do we need ISO/IEC 27001 if we already comply with PCI DSS?
Often yes, because PCI DSS covers cardholder data only. ISO/IEC 27001 reaches the rest of your customer, account and business information, and existing PCI DSS controls feed straight into it.
How do we treat our core banking vendor and cloud provider in the ISMS?
As critical suppliers inside your scope boundary: you assess them, contract for security and exit, review their assurance regularly and evidence the controls you still operate on their platforms.
ISO/IEC 27001 by industry
Every guide in the ISO/IEC 27001 series is written for one question and links back to the hub for the whole picture.
- ISO/IEC 27001 Annex A
- ISO/IEC 27001 audit questions
- ISO/IEC 27001 certification in Australia
- ISO/IEC 27001 for banking, fintech and financial services
- ISO/IEC 27001 benefits
- ISO/IEC 27001 for BPO and shared services
- ISO 27001 case study
- ISO/IEC 27001 for government suppliers and public bodies
- ISO/IEC 27001 for healthcare and health-data processors
- ISO/IEC 27001 for professional and legal services
- ISO/IEC 27001 for software, SaaS and technology
- ISO/IEC 27001 for telecommunications and data centres
Keep exploring
Explore more about ISO/IEC 27001
Watch a video on how to implement ISO 27001 here.
Watch a video on ISO 27001 requirements here.
ISO/IEC 27001 resources
Services for ISO/IEC 27001
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