Assigning permissions to a user creates account-specific access that is harder to standardise and review. Assigning permissions to a role centralises access around duties, so many users can inherit the same baseline rights. That makes onboarding, job changes, and access reviews more consistent, and it reduces the need to manage permissions one account at a time.
Why roles create cleaner access boundaries than user-by-user grants
Permissions attached directly to a user are tied to one account, which makes them easy to overfit to a person’s current tasks and hard to compare across the rest of the population. Permissions attached to a role define the access needed for a job function, so the same baseline can be reused, reviewed, and adjusted once instead of many times.
That difference matters operationally because the role becomes the unit of standardisation. When a user changes teams or takes on a new responsibility, you update the role membership or move them to a different role rather than rebuilding a custom permission set from scratch.
Role-based access also reduces review noise. A reviewer can validate whether “Finance Analyst” or “Production Support” still needs a permission set, while direct user grants force the reviewer to inspect one-off exceptions account by account.
Where direct user permissions break down
Direct assignment is sometimes unavoidable, but it scales poorly when the same access pattern is needed by many people. The more you copy permissions from one account to another, the more likely you are to create drift, forgotten exceptions, and inconsistent entitlements that no longer match the actual job.
It also makes removal harder. If access was granted to the person rather than the function, offboarding and role change processes have to rediscover which permissions were accidental, inherited informally, or granted for a past project. That increases the chance that access lingers after the business need has gone.
- Use direct grants sparingly for true exceptions, not as the default operating model.
- Prefer roles when the same access should be repeatable across multiple users.
- Keep user-specific permissions visible as exceptions so they can be reviewed separately.
For broader governance and access-control context, the distinction aligns with standard RBAC thinking in OWASP Non-Human Identity Top 10 and the control-oriented guidance in ISO/IEC 27002:2022 Information Security Controls.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while CIS Controls v8 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| CIS Controls v8 | 6 — Access Control Management | Roles and direct grants are access control decisions that need centralized review and least privilege. |
| Recommendation — Centralize access assignments and review exceptions to reduce entitlement drift. | ||
| NIST CSF 2.0 | PR.AA — Identity Management, Authentication and Access Control | The question is about how access is assigned and governed across users and roles. |
| Recommendation — Define access through governed roles and review direct permissions as exceptions. | ||
| OWASP Non-Human Identity Top 10 | NHI-03 — Overprivileged and Excessive Permissions | Role-based assignment helps avoid excess permissions and unmanaged one-off grants. |
| Recommendation — Minimize direct entitlements and assign only the rights needed for the role. | ||
Practitioner Guidance
What to prioritise: Treat direct user permissions as exceptions that need an owner and an expiry, not as a convenient shortcut. If the same right is being assigned repeatedly, convert it into a role before the exception set becomes unmanageable.
What to verify: Check whether each role reflects a real business function and whether its permissions are still minimal enough for that function. A role that accumulates unrelated rights is just a wrapped-up permissions pile, not good access design.
Common mistake: Teams often create too many narrowly defined roles to avoid direct grants, then end up with role sprawl that is just as hard to govern. The better test is whether the role makes onboarding, review, and offboarding measurably simpler.
Practitioner takeaway: Use user-level permissions only where the access is genuinely exceptional; otherwise, centralise access in roles so governance follows job function rather than individual accounts.
Related resources from NHI Mgmt Group
- What is the difference between role-based access and API key governance for NHI security?
- What is the difference between granting a privilege directly to a user and assigning a MySQL role?
- What is the difference between shared user pools and app specific access rules in multi-application identity management?
- What is the difference between static permissions and just in time access for privileged systems?
