The Cost of Audit Verification and Who Pays

When a formal audit lands, most leaders think first about the licenses they might owe. The verification cost is the quieter line, and it surprises people because it is not a fixed fee you can plan for. It is the cost of the audit itself, the work the third party accounting firm does to reconstruct your position, and the contract decides whether you or Microsoft pays it. Knowing the rule that governs that cost is the difference between a budgeted exercise and an unwelcome addition to the settlement.

Who runs the verification and why it costs

A formal Microsoft audit runs through a third party accounting firm appointed under the audit clause in the MBSA. That firm reconstructs your deployment, reconciles it against your entitlement, and produces the Effective License Position. The work is real and it is billed. Reconciling a large estate across multiple products, editions, and clouds takes weeks of skilled effort, and that effort has a price. The question is never whether the verification costs money. It is who ends up paying for it.

The rule that decides who pays

The audit clause ties the verification cost to the same threshold that drives the license penalty. If the audit finds that your unlicensed use is 5 percent or more of your total use, you reimburse Microsoft for the cost of the verification and acquire the missing licenses at 125 percent of price. If your unlicensed use comes in below 5 percent, Microsoft carries the cost of its own audit and you simply true up any small shortfall at standard pricing. The verification cost and the license penalty switch on together at the same 5 percent line.

What the cost looks like in practice

The figures below are indicative and built to show how the cost behaves on either side of the threshold, not real client data.

Outcome	Unlicensed use	Who pays the verification	License cost basis
Defended position	Below 5 percent	Microsoft	Standard price on any small true up
Penalty position	5 percent or more	You reimburse Microsoft	125 percent of current price

The cost of the verification can run to a meaningful sum on a large estate, and it arrives on top of the license uplift. Two penalties attach to crossing the same line, which is why the line itself is where the defense concentrates.

Why the position you present matters so much

Because both costs hinge on a percentage, the way the Effective License Position is built decides the bill. The auditor uses Microsoft's own counting methodology and Microsoft's own data from Azure, Microsoft 365, and management tooling. If legitimate entitlements are not surfaced, or deployment is double counted across hosts, your unlicensed percentage looks higher than it is, and a position that should have kept the cost with Microsoft tips it onto you. The verification cost is not only a function of how much you under licensed. It is a function of how accurately your licensed use was counted.

• Unsurfaced entitlements inflate the unlicensed percentage and can push you over the line
• Double counted deployment across migrations raises the numerator without cause
• Undocumented rights, including non production and downgrade rights, change the result once credited
• A contested edition or core assumption can move the position back under 5 percent

How to keep the cost off your ledger

The defense against the verification cost is the same discipline that keeps you under the license penalty: control the position before and during the audit.

1. Establish your position firstBuild your own Effective License Position before any formal review so you know which side of 5 percent you are on.
2. Remediate before the audit fixes the numberIf you sit above the line, close the gap at standard pricing and on your own timeline, so the verification cost never shifts to you.
3. Make sure every entitlement is countedA fuller count of licensed use lowers your unlicensed percentage and protects the cost rule in your favor.
4. Scrutinize the auditor's methodTest how cores, editions, and migrated workloads were counted, since a counting error alone can move you across the threshold.

The next step

The verification cost is avoidable, but only if your position is defended before the auditor sets it. The Microsoft Audit Survival Guide walks the full path from letter to settlement, and the related articles below explain the 125 percent uplift that travels with this cost and how to document the remediation that keeps you under the line. Download the guide to see how the cost rule works and how to keep it on Microsoft's side.

Related reading

If an auditor is already asking questions, our Microsoft audit defense team manages every exchange with the auditor on your behalf.