Estimate your exposure
Estimate the size of the leakage before you validate it
This calculator gives you a directional estimate based on your seat volume, expected margin, and assumed leakage rate. It is designed to help you decide whether a deeper billing review is worth doing now.
Assumptions used
This estimate assumes a percentage of billable seats are not making it cleanly into PSA billing. It does not inspect your real exports or prove which line items are off.
Leakage rate is the share of billable seats or recurring items that do not get invoiced accurately. This is directional, not a substitute for a real audit on exported billing data.
Directional monthly leakage estimate
$1,125
That suggests roughly $13,500/year of recurring revenue could be exposed if the same billing drift continues unchecked.
Total licenses modeled
500
Unbilled seats est.
75
Result interpretation
This is usually enough to justify a real audit.
At this level, a few under-billed quantities, naming mismatches, or orphaned vendor records can quietly erase margin every month until someone validates the billing data line by line.
A real audit typically reveals the specific causes behind this estimate: under-billed quantities, product naming mismatches, vendor lines with no PSA billing equivalent, or orphaned billing records that need review.
Estimate vs audit
Calculator
- Directional estimate based on your assumptions
- Fast way to gauge whether leakage is worth reviewing
- Useful for sizing the problem, not proving the cause
Real audit
- Uses actual vendor or distributor exports and PSA billing exports
- Shows line-item mismatches and revenue impact
- Produces a fix list your team can export and work from
Why this estimate is useful, and where it stops
The gap between what you purchase from Microsoft or a distributor and what you bill in your PSA grows silently. Every seat add, rename, cancellation, or contract update creates another chance for billing to drift if the PSA record does not move with it.
This calculator helps you size that risk quickly. It does not prove which client or product is causing the problem. That is the job of the real audit, which compares exported billing data line by line and shows your team what to correct next.
If the estimate looks meaningful, the next best step is not more guessing. It is validation with actual billing exports so your team can move from an assumed leakage rate to evidence-backed findings.