Segregation of duties (SoD) is a cornerstone of finance operations and a critical control for mitigating fraud, error, and misstatement. In today’s fast-moving business landscape—especially for UK SMEs and growing companies—SoD is no longer just a box-ticking exercise: it is a practical necessity for sound financial governance and regulatory compliance. This article provides a practical framework to design robust segregation of duties across procurement, payments, journal entries, and admin rights, with a focus on real-world application, technology enablement, and the UK regulatory context.
Why Segregation of Duties Remains Vital in Modern Finance Operations
Segregation of duties ensures that no single individual has control over all aspects of any critical financial transaction. This not only reduces the risk of deliberate fraud but also limits the possibility of honest mistakes going unnoticed. For UK businesses, well-structured SoD is a key element of effective internal control, supporting compliance with the Companies Act 2006, HMRC requirements, and expectations of financial integrity.
Modern finance functions face additional complexity from remote work, cloud systems, and automation. These changes make it essential to regularly reassess SoD frameworks and ensure that controls remain effective, practical, and tailored to the business’s scale and technology stack.
Key Areas for Segregation: Procurement, Payments, Journals, and Admin Rights
While every organisation faces unique risks, certain operational areas require particular attention when designing SoD controls:
- Procurement: Segregating requisition, approval, and order placement prevents unauthorised or inappropriate purchasing.
- Payments: Distinct roles for payment preparation, authorisation, and release protect against fraudulent or incorrect disbursements.
- Journal Entries: Separating those preparing from those approving or posting journals maintains data integrity in the general ledger.
- Admin Rights: Restricting access and change rights within finance and ERP systems reduces the risk of privilege abuse or error.
Let’s explore practical frameworks and controls for each area, including a real-world example to highlight SoD in action.
Designing Practical SoD Controls: A Framework Approach
Procurement and Purchase-to-Pay
In a robust purchase-to-pay process, SoD divides the workflow into at least three roles: requestor, approver, and purchaser. For example, the employee who raises a purchase request should not be the person who approves it. Ideally, a separate individual or team places the order with the supplier. Automated workflows in modern finance systems can enforce these stages and flag exceptions where full segregation is not feasible (such as in very small teams).
Case Study Example: A UK technology SME recently implemented a cloud-based procurement system. The accounts assistant raises purchase requests, department heads review and approve, and only finance team members can place final orders. System-enforced workflows and audit logs helped reduce unauthorised spending by 30% within six months, while maintaining process efficiency even as the company scaled headcount.
Payments and Disbursements
Bank fraud and payment errors are perennial risks. At a minimum, payment files should be prepared by one person, reviewed by another, and authorised for release by a third—or at least by someone separate from the preparer. In smaller businesses, dual signatories at the bank or two-factor payment approvals provide layered protection. Staff must never share banking credentials or authorisation tokens.
Journal Entry Controls
Journal entries directly impact financial statements and can be a target for financial manipulation. Standard practice is to require one person to prepare the journal, and another—typically more senior—to review and post it. In cloud finance systems, audit trails should clearly attribute each action to a named user, with automated alerts or reviews for journals above certain thresholds.
Admin Rights and System Privileges
Finance teams increasingly rely on cloud or hybrid ERP, accounting, and payment platforms. Admin rights must be tightly controlled, with system administrators distinct from finance users. Regular reviews of user access lists are essential, and admin activity should be logged and independently reviewed. Where possible, use role-based access controls (RBAC) to enforce least-privilege principles and prevent unauthorised changes.
Technology Enablers and Pitfalls in Segregation of Duties
Automation and cloud platforms can make segregation of duties easier to implement, enforcing approvals and producing detailed audit trails. Digital signatures provide non-repudiation, and workflows can be tailored to business rules. However, over-reliance on technology may create blind spots if admin rights or integration points are poorly controlled. It is crucial to map SoD responsibilities across both technology and manual processes, and to review them regularly as systems evolve.
Balancing Segregation with Operational Realities
For SMEs, full four-eyes controls may not always be practical. In such cases, compensating controls—such as enhanced management review, post-transaction audits, or external oversight—can help reduce residual risk. Documenting exceptions and the rationale for any deviations is vital, especially when responding to audit queries or demonstrating compliance to HMRC and other regulators.
Regulatory and Governance Considerations
Effective segregation of duties supports internal control requirements under the Companies Act and underpins expectations for financial reporting and tax compliance. A strong framework also supports your tax risk register framework, helping identify and address control gaps that could expose the business to penalties or reputational harm.
For businesses seeking comprehensive legal and compliance guidance on governance structures, SoD frameworks are an essential building block, ensuring responsibilities are clearly documented and aligned with statutory and regulatory expectations.
Where company structure changes or external appointments are involved, consult with trusted corporate company secretarial services to ensure that delegated authorities and signatories remain current and appropriately segregated.
Continuous Improvement and Monitoring
Segregation of duties is not a one-off project. As business models, personnel, and technology evolve, SoD frameworks should be reviewed annually or in response to significant organisational changes. Internal audit or third-party reviews can help identify gaps and strengthen controls. Foster a culture where staff understand the ‘three lines of defence’ and feel empowered to escalate concerns over conflicts or breaches.
Conclusion
Effective segregation of duties is a fundamental part of resilient finance operations. By applying structured frameworks, leveraging technology, and balancing controls with operational realities, UK SMEs and scale-ups can reduce fraud risk, support compliance, and underpin sustainable growth. Regular review and clear documentation ensure your controls remain robust as your business evolves.
Key Takeaways:
• Prioritise segregation in procurement, payments, journals, and admin rights.
• Use technology to enforce controls but remain vigilant about system privileges.
• Document exceptions and reviews for audit readiness.
• Align SoD with regulatory requirements and review frameworks regularly for continuous improvement.