Revenue leakage rarely announces itself. It shows up as small, explainable gaps — a discount here, an unbilled service there, a reconciliation difference that gets carried forward month after month. By the time the shortfall is visible in the accounts, the pattern has usually been running for a long time. These are the operational signals we look for first.
1. Sales activity and billed revenue are drifting apart
Operational systems — point-of-sale, dispatch logs, service tickets, production records — should agree with what is invoiced. When volumes rise but billed revenue stays flat, or when invoicing depends on someone remembering to raise a bill, revenue is escaping between delivery and collection.
A simple three-way comparison of what was ordered, what was delivered and what was invoiced is often the fastest way to size the gap.
2. Discounts, credit notes and write-offs are climbing quietly
Discounts and credit notes are legitimate tools, but they are also the easiest place to hide leakage. Watch for credit notes raised after cash has been received, discounts approved outside policy, and write-offs concentrated around particular customers, sales staff or branches.
- Credit notes with vague or repeated narrations
- Discount rates that vary by staff member rather than by customer or product
- Round-number adjustments posted at period end
3. Receivables are ageing without follow-up
An ageing debtor book is a collections problem, but it can also be a control problem. Balances that are never chased, customers who are never put on hold, and accounts that are quietly reclassified as doubtful all suggest that someone benefits from the debt not being pursued.
4. Reconciliations carry unexplained differences
Bank, cash, stock and revenue reconciliations that close with a plug figure are a warning sign, especially when the same difference reappears each month. Reconciling items should be investigated and cleared, not rolled forward.
5. Pricing and master data can be changed without a trail
If price lists, customer terms or tax settings can be edited by the same people who process sales, leakage becomes very difficult to detect. Change logs, segregation of duties and periodic review of master data changes are basic protections that are often missing in growing businesses.
What to do next
Start with data rather than assumptions. A focused review that compares operational activity to billing and collections, tests discount and credit-note approvals, and examines master data changes will usually quantify the exposure within a few weeks. From there, remediation is a matter of tightening the specific controls that failed — and, where the evidence points to misconduct, moving into a formal investigation.
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