Traditional revenue assurance grew up around the ticket: was the fare filed correctly, was the ticket priced against it, was the coupon flown and collected? Those checks still matter, but in a modern airline they cover a shrinking share of the ways money actually escapes. The larger leaks now sit downstream of ticketing, in processes where discretion, disruption and partner settlement meet. The useful way to think about them is as a set of distinct mechanisms — because the control that stops one does nothing for the next.
Waivers and refunds: discretion without memory
Every airline authorises staff to waive fees and refund fares outside standard rules — it must, or disruption and goodwill would be unmanageable. The leak begins when discretion has no memory: waiver codes that cover everything from weather to "customer was unhappy", refund approvals that never reference the original fare conditions, and no reporting that links waiver volumes to the individuals and offices granting them. The control is not less discretion; it is recorded discretion. Reason codes with narrow definitions, approval thresholds that escalate with value, and a monthly view of waiver and refund activity by agent, office and reason — reviewed by someone outside the granting team. Patterns that persist across normal operations, rather than spiking with disruption, are the ones worth pulling on.
Group deposits and materialisation
Group bookings are sold on negotiated terms: deposits, payment schedules, materialisation expectations and name-change deadlines. Each term exists to protect the airline from holding inventory that never flies — and each is routinely softened in practice by sales teams under target pressure. Deposits deferred, forfeiture clauses waived at cancellation, name-change fees quietly dropped. The leak is invisible ticket by ticket and substantial in aggregate. The control is a reconciliation nobody usually owns: contracted terms versus applied terms, per group, with variances above a threshold requiring commercial sign-off outside the selling team. Where that reconciliation exists, behaviour changes before the first report is even issued.
Leakage is rarely one hole. It is a hundred small permissions, each individually defensible, that nobody ever adds up.
Agency incentives and commission recovery
Agency and corporate dealing generates a lattice of back-end obligations: tiered incentive payments against targets, upfront commitments recoverable if volumes fall short, marketing contributions, and fare-basis restrictions on what qualifies. Two leaks recur. Incentives are paid on gross figures that include refunded and exchanged tickets never clawed back; and recoverable commitments are simply never recovered, because the contract sits with sales and the collection would sit with finance — and no process passes it across. The control is equally unglamorous: incentive calculations rebuilt from settled, net transactions rather than sales snapshots, and a live register of recoverable commitments with owners and dates.
Interline proration: the quiet transfer
When a journey spans carriers, revenue is divided by proration — standard industry rules unless a special agreement says otherwise. The leaks are structural: special proration agreements negotiated years ago that no longer favour the airline; billings from partners accepted without challenge because the rejection process is under-resourced; and the airline's own outbound billings raised late or incompletely after schedule changes and reroutings. Because settlement nets through clearing mechanisms, the losses never appear as an invoice anyone questions — they appear as a slightly lower net receipt, forever. The control is a periodic re-pricing of a sample of interline journeys from first principles, and treating the rejection team as a revenue function rather than a clerical one.
Ancillary collection and onboard sales
Ancillary revenue — bags, seats, upgrades, changes — is sold across more channels than flown revenue ever was: web, app, airport, call centre, third parties. Each channel is a collection point, and the reconciliation question is simple to state and rarely answered: does everything sold reconcile to everything collected, by channel, by day? Airport-collected fees are the classic gap, where payment happens at a desk under time pressure, far from the systems that recorded the entitlement. Onboard retail adds a cash-and-stock dimension — crew floats, unrecorded sales, stock shrinkage between catering and cabin — that calls for the same controls any retailer applies: independent stock counts, banked-versus-reported comparisons by flight and crew, and exception follow-up that visibly happens.
From checks to a leakage programme
Individually, each control above is modest. The step change comes from running them as a programme:
- Map every point where value is granted, moved or collected after ticketing — the leak points — and name an owner for each.
- Test full populations, not samples: waivers, group contracts, incentive payments and channel reconciliations are all datasets, and exceptions can be surfaced monthly rather than found annually.
- Report recovered and prevented amounts to the CFO on a fixed rhythm, so the programme is judged on money, not activity.
Where to start
Pick the two mechanisms where your airline's exposure is most obvious — for most network carriers, waivers and interline; for most point-to-point carriers, ancillary reconciliation and groups — and run a focused review of the last full year of data. The findings fund the rest of the programme, and more importantly they establish the principle that post-ticketing revenue is controlled revenue.