The SPLA Audit Defense Guide for Hosters
A SPLA audit checks every monthly cycle across a 36 month lookback. Back fees are fixed, but the penalty uplift is negotiable, and reporting discipline is the structural defense. Here is the full picture for hosters.
For a hosting provider, a SPLA audit is a different animal from an end customer license review. It does not check where you stand today. It checks where you stood every month for three years. That single fact shapes the whole defense, and hosters that understand it early protect both their compliance position and their margin. This guide lays out how a SPLA audit runs and where the buyer side defense lives.
What SPLA is and why it audits differently
The Services Provider License Agreement is Microsoft's monthly licensing program for hosters, managed service providers, and outsourcers that deliver Microsoft software to external customers. It is pay as you consume. You report what you used each month and you pay for it. Because the model is monthly, compliance is verified for every monthly reporting cycle, not just the current position.
A SPLA audit examines every month across a 36 month lookback. A single position today is not enough. The auditor reconstructs each month and checks that what you reported matches what you used. A gap in any month is a gap, even if your current reporting is clean.
Who conducts the audit and what they can demand
A SPLA audit is run by a Big Four accounting firm acting under the MBSA audit clause as an independent third party. The firm has broad authority. It can request deployment records, server configuration data, customer contracts, and usage logs. The breadth is the point. The auditor is reconstructing three years of monthly consumption, and that requires a wide evidence base.
How the SPUR and SAL drive the numbers
Hosters apply the Services Provider Use Rights, the SPUR, and report Subscriber Access Licenses or processor counts each month. Misapplying the SPUR cuts both ways. Under reporting is a compliance risk that surfaces in the audit. Over reporting wastes margin month after month, money you never needed to spend. Correct application of the SPUR is therefore both a compliance discipline and a margin discipline.
What is fixed and what is negotiable
This distinction is the heart of SPLA defense.
| Component | Status | Where the defense sits |
|---|---|---|
| Back fees at the price file rate | Not negotiable | Reduce by correcting the reconstructed monthly base |
| Penalty uplift, 25 to 125 percent | Negotiable | Argue down by severity, duration, and nature of the gap |
Back fees follow the price file and are not up for debate at the rate level. What you can change is the base they are applied to, by reconstructing the monthly positions accurately and removing what was never owed. The penalty uplift, which ranges from 25 to 125 percent depending on severity, duration, and the nature of the under reporting, is genuinely negotiable, and that is where a large part of the value is won.
The structural defense is reporting discipline
The strongest defense is built long before any audit notice arrives. It is reporting discipline, maintained every month.
- Monthly SAL reports submitted on time for every month, with no gaps in the record.
- Sealed daily authentication counts that evidence actual use rather than estimates.
- Customer mapping for each reported SAL block, so every license traces to a subscriber.
- Product version mapping that matches what was deployed to what was reported.
- Documented multi tenant isolation that shows clean boundaries between customers.
There is only a short window to correct a reporting mistake, so the discipline has to be continuous. A hoster with three years of clean, evidenced monthly reports walks into an audit with the work already done.
What to do when the notice arrives
If you receive a notice without that history in place, the defense shifts to reconstruction. You rebuild the monthly SAL base from your operations data, separate the fixed back fees from the negotiable uplift, and assemble the customer and version mapping the auditor will test. Done well, reconstruction can materially reduce the base the back fees are applied to, and a strong reconstruction strengthens the argument to bring the uplift down.
How we defend a SPLA audit
We sit on your side of the table, never the vendor's. We reconstruct the monthly positions across the 36 month lookback, defend the base line by line, separate what is fixed from what is negotiable, and argue the uplift down on severity, duration, and nature. Fixed Fee from $18,000 or Gainshare with no risk to you. We reduce your exposure or we reimburse our service fee.
Get the full SPLA defense guide
Fixed Fee from $18,000 or Gainshare with no risk to you. We reduce your exposure or we reimburse our service fee.
Download the SPLA Audit Defense GuideIf this is live on your desk right now, our SPLA audit defense team challenges the counting before back fees are set.