Workflow guide
PSA Invoice Quantity Review for MSPs
PSA invoice quantity review helps MSPs check whether agreement, service, product, and invoice quantities still match the source systems that drive billable usage.
The billing issue
The PSA usually holds the quantity that becomes the invoice line. That quantity may come from agreements, additions, recurring services, products, or invoice records. If source systems change but the PSA quantity does not, the invoice can drift.
A PSA invoice quantity review compares the planned billing quantity against current license, device, product, service, and client counts before invoices are sent.
Common examples
Agreement additions are lower than the current license count
Recurring device services do not match active endpoints
Products in the PSA do not line up with vendor SKU or product names
A client mapping gap makes usage appear missing or duplicated
An invoice line still reflects a stale quantity from a previous month
How MSPs typically review it manually
- 1
Start with PSA invoice, agreement, service, or product quantities.
- 2
Identify the source system that should validate each billed quantity.
- 3
Confirm the client and service mapping before comparing counts.
- 4
Compare billed quantities against current license, device, or product counts.
- 5
Review the largest and clearest discrepancies before invoice approval.
How BillingReconcile helps organize the review
BillingReconcile helps teams review PSA-side billing quantities against connected source counts in one workflow. It keeps the review focused on quantities, discrepancies, and mapping context before invoicing and payment.
Compare PSA quantities against connected license, device, and product counts
Keep client and service mapping context visible
Surface underbilling, overbilling, stale quantities, and unmapped usage for review
Support a clear final human review before invoice day
Related guides
Continue the billing review workflow
ConnectWise agreement additions
Review agreement additions against current license source counts.
Open guideConnectWise billing reconciliation
Review ConnectWise agreement, service, and invoice quantities against source counts.
Open guideTD SYNNEX StreamOne + PSA reconciliation
Review StreamOne source counts beside PSA agreement, service, and invoice quantities.
Open guideFAQ
Questions MSP teams ask
Review PSA quantities before invoices are finalized
Compare PSA-side billing quantities against connected source counts and keep discrepancy context visible.