Segregation of Duties Matrix

What a segregation of duties matrix shows

A segregation of duties matrix makes it easier to review whether incompatible actions are assigned to the same person, role, or service identity. It can identify combinations that may need separation, a compensating review, or a documented decision. A segregation of duties matrix template is a planning and review aid; it does not enforce approvals, prove misconduct, or determine that a control failure occurred.

List the process, actors or roles, resources, actions, conflict rule, review owner, evidence, and disposition. Define conflicts for the organization’s process rather than copying generic rules without context. A conflict may arise when one actor can both create a transaction and approve it, change vendor payment details and release payment, or administer access and review those same access changes.

NIST SP 800-53 Rev. 5 includes AC-5, Separation of Duties, and AC-6, Least Privilege. Consult the NIST publication record and applicable control text for context. The reference does not mean every example here is required by a particular regulation or applies to every organization.

Define conflict rules before filling the template

A useful SoD conflict matrix begins with the process and its consequential steps. Identify who can initiate, change, approve, release, reconcile, and administer. State which combinations need review and why. Keep role conflicts distinct from person-level assignments: two roles may be designed separately but assigned to one person, while one role may bundle incompatible actions.

For each combination, record a disposition: separate access, retain with a compensating review, restrict the process, or document an approved exception. Name the decision owner, evidence needed, review trigger, and any reassessment point. Avoid relying on a color or “high risk” label without a clear rule and action.

A segregation of duties matrix Excel worksheet can be created by importing CSV where available, but check formulas, filters, validation, and formatting after import. The related tool exports CSV only; it does not produce a native Excel workbook or PDF. Keep the completed worksheet’s access appropriate to its contents.

Examples for accounts payable, payroll, and IT

Accounts payable: One role may enter an invoice, while another approves and releases payment. A segregation of duties accounts payable matrix can show vendor creation, invoice entry, payment approval, release, and reconciliation as separate steps. The owner should review actual system capabilities and any compensating checks.

Payroll: Separate employee payment-detail changes from payroll approval and release when the workflow and available controls support that separation. A payroll access matrix template can record who changes details, who reviews them, who approves a run, and what evidence is retained. It should reflect the actual process, not assume one universal rule.

IT administration: Identify who can provision accounts, grant privileged rights, change security settings, and review administrative activity. A segregation of duties IT matrix can surface combinations for review, but an access role or log entry does not establish that someone misused access.

SOX-related work: A SoD matrix for SOX may help an organization organize its own process and control review. It does not establish that a control is required, effective, or sufficient for a particular company. Responsible finance, audit, and legal reviewers should determine applicable obligations and evaluate evidence.

Worked hypothetical example

A fictional small retailer has one finance coordinator who creates vendors and enters invoices, plus a controller who approves and releases payments. During review, the matrix shows that the coordinator’s role also has a payment-release permission inherited from an older system group. The owner records the combination for investigation, checks current configuration and transaction flow, and asks the system administrator whether the inherited right is needed.

The organization removes the unused release permission after confirming that the controller’s workflow still functions. It records the change and checks a sample transaction path. If staffing constraints prevented separation, the matrix could record a compensating review for the accountable owner to evaluate. This fictional example does not prescribe a universal accounting control.

How to review and maintain the matrix

1. Map the process from initiation through approval, release, reconciliation, and administration.
2. Identify actors, system identities, roles, resources, and actions involved.
3. Write conflict rules tied to concrete consequences and the organization’s own policy.
4. Compare role design with actual user assignments and effective permissions.
5. Investigate flagged combinations, assign an owner, and document decisions and evidence.
6. Revisit the matrix when process steps, systems, roles, or owners change.

Do not treat every overlap as a confirmed control deficiency. Some combinations may be acceptable under a documented, reviewed compensating process; others may require a change. Record the facts and decision authority so later reviewers understand why an overlap was retained or removed.

Common mistakes

Frequent mistakes include defining conflicts too broadly, omitting service accounts, assuming job titles equal system permissions, and failing to check inherited access. Another mistake is recording a mitigation as if it were already operating. Separate current controls from planned actions and retain evidence that a review or approval occurred. A “no conflict” result in a worksheet does not replace checking system configuration.

Frequently asked questions

Does a flagged combination prove a violation?

No. It identifies a pattern for review. Determine actual permissions, process, policy, and applicable requirements before deciding what it means.

What if a small team cannot fully separate duties?

Document the constraint and ask the accountable owner to evaluate practical alternatives or compensating review. Record who performs it and what evidence is kept.

Does this template satisfy SOX or another regulation?

No. It helps organize a review but does not interpret requirements, establish control effectiveness, or certify compliance.

How should I handle a conflict found in the matrix?

Verify it against actual assignments and system behavior, assign an owner, and record a decision, action, evidence, and follow-up.