Security teams should treat expense platforms as governed financial systems, not simple workflow apps. They need scheduled access recertification, role based approvals, removal of dormant accounts, and evidence that permissions match current job duties. Automated review workflows help reduce human error, create audit trails, and make it easier to prove compliance with controls tied to sensitive financial and employee data.
How to structure access reviews for expense platforms
Expense and travel systems often sit at the intersection of finance, HR, procurement, and approvals, so access review scope should start with who can submit, approve, reconcile, and administer. Reviewers need a current role map, clear business ownership, and a defined cadence so certifications are tied to job function rather than being treated as a generic IT housekeeping task.
The most effective review is not a screenshot exercise. It should test whether each permission still matches a valid business need, whether approvers still sit in the right chain of authority, and whether elevated roles are justified by current duties. Where organisations already run broader IAM and IGA Basics, expense platforms should be handled as one of the systems where entitlement governance is most visible to auditors and finance teams.
For platforms with delegated administration, the review should distinguish normal end-user access from configuration access, payment-related privileges, and export rights. That distinction matters because a user who can merely file expenses is very different from someone who can change approval rules, alter policy thresholds, or export sensitive employee and payment data.
What good review evidence looks like
Useful evidence is specific and decision-ready. Reviewers should be able to see the account owner, the role or entitlement name, the source of approval, the last known business justification, and the action taken when access is no longer needed. That is why many teams align the workflow to a formal access recertification process rather than relying on ad hoc manager email approvals; Access Reviews and Certification Guide provides a practical model for reducing review volume while increasing reviewer context.
Good evidence also shows that the review was complete. In practice that means dormant accounts were flagged, exceptions were recorded, and removals were executed or formally accepted with expiry dates. If the platform supports business-unit or role-based review campaigns, teams should preserve the campaign settings and the final disposition as audit evidence, not just the approval log.
For organisations that depend on third-party administrators or external support, the same evidence standard should apply to vendor-held access. A platform review is incomplete if it ignores privileged support accounts, break-glass access, or outsourced operations paths that can still reach financial records or approval controls.
How to keep reviews from becoming rubber stamps
Reviews fail when managers are asked to approve long entitlement lists without context. The better pattern is to group access by business function, highlight unusual permissions, and use risk indicators such as inactivity, privileged access, or cross-functional entitlements to force a closer look. That approach reduces reviewer fatigue and makes exceptions easier to challenge.
Automation helps most when it removes clerical work, not judgment. Workflows can prepopulate owner data, compare entitlements against HR status, route approvals by policy, and trigger offboarding when access is denied. Where teams also need to validate travel-related risk around remote use and lost devices, a Travel Cybersecurity Guide can help with the broader user-safety side of operating these systems, but the access review itself still needs explicit entitlement decisions.
Systems with long-lived service or integration accounts deserve special attention because they are easy to overlook in a human-centric review. If the platform has any machine-to-system or automation access tied to reimbursements, imports, or reporting, review those accounts separately so they do not hide inside ordinary user recertification campaigns.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST SP 800-53 Rev 5 and CIS Controls v8 set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | AC-2 — Account Management | Access recertification and dormant account removal are core account governance needs. |
| AC-6 — Least Privilege | Expense approver and admin access should be limited to the minimum duties required. | |
| AU-6 — Audit Review, Analysis, and Reporting | Review workflows need evidence trails that show who approved or removed access. | |
| Recommendation — Review account necessity regularly and disable accounts that no longer support an approved business need. Restrict expense platform entitlements to the minimum permissions needed for each role. Retain and review access review evidence so decisions are traceable and auditable. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | The question is about governing who may use and approve access in a business system. |
| A.5.18 — Access rights | Periodic review and removal of stale permissions are direct access-rights obligations. | |
| Recommendation — Define and enforce access control rules for expense and travel platform users and approvers. Recertify and revoke access rights when roles, duties, or business need change. | ||
| CIS Controls v8 | CIS-5 — Account Management | The subject needs account review, removal of dormant access, and approval governance. |
| CIS-6 — Access Control Management | Role-based approvals and permission review map directly to access control governance. | |
| Recommendation — Manage accounts centrally and remove unnecessary or inactive access promptly. Use role-based access rules and periodic reviews to limit who can approve or alter expenses. | ||
Practitioner Guidance
What to verify: Before you trust the review outcome, confirm that each approver had the right business context to decide, not just a name in the workflow. The strongest signal is not that a review was completed, but that someone explicitly removed access, kept it with a reason, or set an expiry for a justified exception.
Decision rule: If the entitlement can affect payment flow, policy settings, exports, or audit evidence, treat it as high-value access and review it more frequently than routine submitter access. If the access is dormant, inherited, or no longer tied to the user’s job, remove it rather than asking for a fresh justification after the fact.
Practitioner takeaway: Expense platforms should be governed like finance-adjacent access systems, where the goal is not broad approval convenience but provable, current, and reviewable entitlement ownership.
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Reviewed and updated by the NHIMG editorial team on October 30, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org