A finance employee moves to the marketing team, yet their access to the payment system stays active for months. No one notices until an auditor arrives and asks why.
Problems like this are becoming more common because attackers now prefer stealing identities over hunting for software flaws. The Sophos Active Adversary Report 2026 found that 67% of the incidents handled by its incident response and MDR teams last year were rooted in identity-related attacks.
That is why many organizations are tightening how they manage user identities, and two terms keep coming up: IAM and IGA. People often treat them as the same thing, but the difference between IAM and IGA is quite fundamental, and this article walks through it step by step.
What Is IAM (Identity and Access Management)?
Before comparing the two, it helps to understand what each one does. We start with IAM, the term IT teams have known for longer.
IAM stands for Identity and Access Management. It is a set of policies, processes, and technologies that make sure only legitimate users can enter an organization’s applications, systems, and data.
A user here can be an employee, a partner, a customer, or another application connected to the system. Each one must be recognized before it is allowed to do anything.
The core of IAM comes down to two questions: who is trying to get in, and what are they allowed to open once inside. The first is answered through authentication, and the second through authorization.
Authentication is the process of proving identity, for example with a password, a one-time code, or a fingerprint. Authorization decides what access a verified person receives, for example an HR officer can open salary data while a warehouse clerk cannot.
Two features show up most often: single sign-on (SSO) and multi-factor authentication (MFA). SSO lets employees log in once to reach many applications, while MFA asks for an extra proof such as a code sent to a phone.
A daily example is simple. When you open your work email and are asked to enter a code from an authenticator app, that is IAM at work.
Without IAM, every application keeps its own accounts and passwords. Employees end up reusing the same password in many places, and a single leak can open everything.
What Is IGA (Identity Governance and Administration)?
If IAM controls the front door, who makes sure the list of key holders is still correct? That is where IGA comes in.
IGA stands for Identity Governance and Administration. It is an oversight layer that checks whether the access already granted is still appropriate, who approved it, and whether all of it can be proven during an audit.
If IAM handles the act of getting in, IGA handles whether that access is deserved. A person can pass authentication perfectly and still hold access that should have been removed.
IGA has five key elements. Each one solves a different problem:
- Access requests and approvals. Employees ask for access through an official workflow, and their manager approves it. For example, a new analyst requests access to the sales dashboard and the manager approves it within a day.
- Periodic access reviews. Managers regularly re-check the access list of their team members. For example, every quarter a department head receives the team’s access list and crosses out what is no longer relevant.
- Role management. Access is grouped by job role so it is granted consistently. For example, the cashier role automatically gets cashier access without access to financial reports.
- Identity lifecycle management. Access changes as employees join, move, or leave. For example, the account of a resigning employee is disabled on their last working day.
- Audit and reporting. The system records who holds which access and who approved it. For example, an auditor asks for evidence of who can use the payment system, and the report is ready in minutes.
Standards such as ISO 27001, GDPR, SOX, and PCI DSS require organizations to show that access is properly controlled. IGA produces the evidence auditors look for.
The problem IGA handles most often is access that piles up. An employee who changed departments three times in five years may hold access from all three, even though the current job needs only one.
The technical term is privilege creep, and it is almost invisible without periodic access reviews. The longer someone stays at a company, the more likely their account carries rights they no longer need.
Picture an office building. IAM is the guard in the lobby checking access cards, while IGA is the team making sure cards are held only by the right people and collecting the cards of former employees.
IAM vs IGA: The Differences
Both systems protect access, so it is easy to mix them up. The seven differences below show where the line sits, each with a short example.
1. Main Purpose
IAM aims to make access secure and convenient for legitimate users. IGA aims to make sure the access a user holds matches policy and job role.
For example, IAM lets a new employee log in to every application with one account. IGA then checks whether that employee actually needs access to the payroll application.
2. The Question Each One Answers
IAM asks: who are you, and may you come in? IGA asks: is the access you hold appropriate for your position?
Say a warehouse admin logs in successfully with MFA, so IAM is satisfied. IGA still asks why the same account can approve vendor payments.
3. Timing: At Login or Across the Account’s Life
IAM works at the moment of access, every time a user tries to log in or open a resource. IGA works across the life of the account, from joining and changing teams to leaving.
An employee who moves from sales to HR can still log in as usual. Only IGA flags that access to prospect data is no longer relevant.
4. Feature Scope
IAM covers authentication, MFA, SSO, and passwordless login. IGA covers approval workflows, access reviews, role management, lifecycle management, and audit reporting.
Fingerprint login sits on the IAM side. Sending an access list to a manager for review sits on the IGA side.
5. People Involved
IAM is usually run by IT and security teams because it is technical. IGA involves more people: managers, data owners, HR, and compliance teams.
During an access review, the sales manager decides whether a team member still needs to open the CRM. IT simply carries out that decision.
6. Compliance and Audit Needs
IAM reduces the chance of unauthorized people getting in, but it does not automatically produce evidence for auditors. IGA records who requested, approved, and holds each access.
For instance, an auditor asks why 12 employees can see customer data. Without IGA, IT must gather the answer by hand from many systems over several days.
7. How Success Is Measured
IAM success is measured by how smooth and secure logins are, such as the number of failed logins, the share of users on MFA, and the time taken to recover locked accounts. IGA success is measured by how tidy access rights are, such as the share of access reviews completed on time and the number of accounts with excess access.
If 95% of users already use MFA, IAM looks healthy. If 200 accounts still hold excess access at the same time, the problem sits on the IGA side.
How IAM and IGA Work Together
Even though their jobs differ, IAM and IGA do not run separately. The three scenarios below show how they complement each other in one flow.
In simple terms, IGA decides who should hold access, and IAM enforces that decision every time a user signs in. IAM’s records of who accessed what then flow back to IGA for review and audit.
Scenario 1: A New Employee Joins
When HR enters a new employee’s data, IGA creates an access request based on their role and asks their manager for approval. Once approved, IAM creates the account, sets up MFA, and opens SSO to the relevant applications.
For example, a new accountant gets email, the journal application, and the tax dashboard on day one. They do not automatically get access to payroll data.
Scenario 2: An Employee Changes Departments
A job change in the HR system prompts IGA to recalculate which access is appropriate. Old access is removed, new access is requested, and IAM applies the change across all applications.
For example, a logistics staff member promoted to procurement loses warehouse access and gains access to the vendor system. Without this flow, both sets of access would pile up in one account.
Scenario 3: An Employee Leaves or Unusual Activity Appears
When a contract ends, IGA flags the account for deactivation and IAM closes any login sessions still open. If IAM logs a suspicious sign-in, the security team can ask IGA who owns that access and who approved it.
For example, a former employee’s account tries to log in at midnight from overseas. IAM rejects the login, while IGA confirms the account should no longer exist.
When Does a Company Need IGA, Not Just IAM?
IAM is usually installed first, so IGA can feel like an add-on that can wait. The five signs below show when waiting starts to become risky.
- Accounts are still created and removed by hand. IT admins process requests from email or chat one by one. For example, a resigning employee’s account is only disabled two weeks after their last day.
- No one knows exactly who holds which access. The answer is scattered across spreadsheets and old tickets. For example, the security team needs three days to list who can open customer data.
- Auditors start asking for access evidence. They want approval trails and review results, not just a list of users. For example, an ISO 27001 audit asks when employee access rights were last reviewed.
- People move in and out often. Rotations, short contracts, and third-party workers make access go stale quickly. For example, a company with hundreds of vendors must make sure vendor accounts expire when a project ends.
- Segregation of duties must be protected. One person should not hold access that conflicts with itself. For example, a staff member who can register new vendors and also approve their payments opens the door to fraud.
If two or three of these signs already feel familiar, IGA deserves a place in this year’s plan. Start with the process that fails most often, such as removing access for leavers, then expand step by step.
Conclusion:
IAM makes sure the right person can get in safely, while IGA makes sure the access that person holds stays appropriate over time. The difference between IAM and IGA lies in purpose, timing, the people involved, and the kind of evidence each produces.
The practical path is to start with solid IAM. Add IGA once the number of users, role changes, or audit demands become hard to handle manually.
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FAQ
IAM controls who gets in, while IGA makes sure the access they hold stays appropriate.
Not in practice, because IGA relies on IAM to enforce its decisions.
Not at first, add it once role changes or audit demands increase.
