How should organisations build a credible IGA ROI case before buying software?

Start with measurable work already happening in your environment, then value the hours with your own labor rates and volumes. Break costs into access reviews, lifecycle changes, access requests, remediation follow-up, and audit evidence preparation. Compare projected reductions against the full program cost, including implementation, connectors, training, support, and internal effort. Keep risk reduction separate from hard savings.

Build the ROI case from actual identity work, not abstract license savings

A credible IGA business case starts with work that is already happening and measurable: access reviews, joiner-mover-leaver changes, request fulfilment, remediation follow-up, and audit evidence collection. That gives finance and security a shared baseline. The strongest cases show volume, effort per item, and the labour cost of the people doing the work, then compare that baseline against the implementation, connector, training, support, and internal operating costs of the IGA programme.

The right comparison is not “software cost versus hoped-for efficiency”. It is “current manual cost and control friction versus future run cost and control improvement”. That distinction matters because many IGA projects pay back through time saved in recurring controls, but the economics only hold if the organisation can prove where the time is actually spent today. A generic estimate rarely survives procurement, while a workflow-level baseline usually does.

For practitioners, the first test is whether the current process can be counted cleanly enough to stand up in front of finance. In practice, weak ROI cases fail because they bundle unrelated overhead into one headline number and then struggle to defend the assumptions.

How to break the cost model into defensible components

The easiest way to make the case believable is to separate each cost centre and each expected reduction. Access reviews are usually measured by reviewer hours, approver count, population size, and the number of exceptions requiring follow-up. Lifecycle changes should include onboarding, transfers, leavers, rework, and exceptions where manual intervention is still needed. Access requests need the time spent by requestors, approvers, fulfilment teams, and administrators. Audit evidence preparation should include the gathering, formatting, reconciliation, and sign-off time that consumes control owners every cycle.

Once those volumes are known, value them using internal labour rates rather than market guesses. That avoids inflated savings claims and makes the model comparable with other investments. Then subtract the full programme cost, not just the software subscription. A realistic total includes implementation services, connector build and maintenance, workflow configuration, change management, training, support, and the ongoing internal effort needed to operate the programme.

Baseline the current process using live ticket, queue, and review data, not workshop estimates.
Separate one-time implementation cost from recurring operating cost.
Model hard savings and risk reduction independently so the payback story stays credible.
Stress-test assumptions against the systems that are hardest to integrate, because they usually drive the real operating cost.

Where organisations misjudge this most often is in connector effort and exception handling, because those costs stay hidden until the first real review cycle exposes them.

Where ROI claims become credible, and where they usually break

Tighter control often increases short-term implementation overhead, so organisations have to balance provable efficiency gains against the cost of integration and process change. The strongest ROI cases acknowledge that some benefits are operational and some are risk-based. Faster deprovisioning, fewer manual errors, cleaner audit evidence, and better access governance can all be real outcomes, but they should not be collapsed into one blended savings line.

There is no universal standard for how much risk reduction should be monetised. Best practice is to keep it separate from hard savings unless the organisation has a defensible method for estimating avoided audit effort, reduced rework, or lower incident exposure. That prevents the model from becoming speculative. If the buyer wants a more conservative case, present the operational savings as the base case and treat risk reduction as a supporting benefit, not the reason to purchase.

One useful way to pressure-test the case is to ask whether the projected savings still hold if review volumes fall, if fewer systems integrate in year one, or if exception handling remains high. If the answer is no, the ROI is too dependent on ideal conditions. In practice, IGA deals are won when the business case survives conservative assumptions, not when it only works under best-case automation rates.

Standards & Framework Alignment

This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.

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	CIS 5 — Account Management	IGA ROI centers on account and access lifecycle effort.
	CIS 6 — Access Control Management	IGA automates access requests and reviews tied to access control cost.
Recommendation — Measure account lifecycle work and reduce manual access administration. Use access control data to quantify review and approval workload.
NIST CSF 2.0	GV.RM — Risk Management Strategy	The case separates hard savings from risk reduction in investment decisions.
	ID.IM — Improvements	IGA business cases should baseline current work and measure improvement.
Recommendation — Quantify operational savings separately from risk-based benefits. Baseline current identity workflows and track measurable process improvement.

Practitioner Guidance

What to prioritise: Start with the two or three control processes that already consume the most manual effort, usually access reviews, access changes, and audit evidence production. Those are the easiest to baseline and the hardest for a buyer to dismiss as theoretical savings.

What to verify: Confirm that the baseline reflects actual volumes and actual effort, including exceptions and rework. If the numbers come only from manager estimates, the ROI case is too weak for procurement or finance scrutiny.

Decision rule: If a benefit cannot be tied to a current workflow, a measured volume, and a labour rate, keep it out of the hard-savings line. Treat it as a qualitative or risk-based benefit instead.

Practitioner takeaway: The most credible IGA business cases are conservative, workflow-based, and costed from today’s manual reality, because that is what survives both budget review and post-implementation accountability.