How IAM Review Works
An IAM Review typically begins by establishing the population of active identities and the systems they can access. Reviewers then compare assigned permissions with job responsibilities, organizational roles, segregation-of-duties requirements, and documented approval policies.
- Identity inventory: Identify employees, contractors, administrators, service accounts, and application identities.
- Access mapping: Document applications, roles, permissions, groups, and privileged access associated with each identity.
- Ownership validation: Confirm that accounts have identifiable owners and appropriate business justification.
- Approval verification: Check whether access changes were authorized through established processes.
- Activity review: Compare access activity with assigned responsibilities and investigate unusual or unnecessary privileges.
The review should also consider joiner, mover, and leaver processes so that access changes occur when employees enter, change roles, or leave the organization.
IAM Review in Finance and Procurement
Finance applications often connect multiple workflows, making role design important. For example, an employee who creates a requisition may need access to procurement workflows, while approval authority for a purchase order should remain aligned with the organization's authorization matrix. Reviewing these permissions helps preserve separation between transaction creation, approval, payment, and accounting activities.
IAM controls also extend into accounting. A user's ability to create or modify ledger entries, maintain master data, approve transactions, or access financial reports should correspond with their assigned responsibilities. A well-maintained chart of accounts and clearly defined accounting roles can further support consistent reporting, controls, and auditability.
Access Reviews and Financial Controls
IAM Review should be connected with broader control activities rather than treated as an isolated technology exercise. Access rights can affect who initiates transactions, who approves them, who records accounting entries, and who can alter financial information.
For example, a reviewer may compare ERP permissions with the organization's P L Review and other financial review responsibilities to determine whether reporting access is appropriate. Similarly, Coding Review responsibilities should be considered when evaluating who can assign accounts, cost centers, tax codes, or other accounting classifications.
Contractual access should also be assessed for employees and third parties whose responsibilities depend on specific commercial arrangements. A Contract Review process can help establish which external users require system access and whether those permissions remain consistent with the applicable engagement.
Audit Trails and Review Evidence
Effective IAM Review requires evidence showing who received access, who approved it, when changes occurred, and what permissions were granted or removed. These records support internal control testing and provide a clear basis for explaining access decisions during audits.
Audit Trails can record each step in vendor management, including actions performed by humans or AI, helping teams maintain transparency and reviewability across vendor-related workflows. Similar principles can be applied to identity administration so that access changes remain traceable.
Review evidence should generally include access listings, approval records, role definitions, exception documentation, change histories, and confirmation that identified actions were completed.
Tax and Sensitive Financial Access
IAM Review can also support controls around tax-sensitive processes. Users who maintain tax configurations or validate transactions involving sales tax may have permissions that affect jurisdiction rules, nexus determinations, exemptions, VAT or GST treatment, and financial reporting. Access should therefore be restricted according to documented responsibilities and appropriate approval authority.
Where privileged users can modify tax rates, certificates, customer or vendor tax classifications, or related accounting configurations, periodic access validation provides an additional layer of control over financial data and audit exposure.
Best Practices for IAM Review
- Review regularly: Establish periodic access certifications based on system sensitivity and organizational requirements.
- Apply least privilege: Give users only the permissions needed to perform their current responsibilities.
- Separate conflicting duties: Identify combinations of permissions that could undermine financial controls.
- Prioritize privileged accounts: Apply enhanced monitoring and review to administrator and high-impact identities.
- Document exceptions: Record business justification, approval, owner, and review date for exceptional access.
- Connect HR and IAM data: Use employment and role changes to keep access aligned with organizational responsibilities.
A mature IAM Review program combines identity data, access policies, approval evidence, and activity records to provide a reliable view of who can access critical financial systems and why.
Summary
IAM Review evaluates whether identities and access permissions remain appropriate, authorized, and aligned with business responsibilities. In finance environments, it supports segregation of duties, ERP controls, procurement governance, accounting accuracy, tax-related controls, and audit readiness. Regular reviews with strong documentation and traceable approval records help organizations maintain disciplined access management as users, roles, systems, and workflows change.