Revenue leakage is money you've already spent, on distributor licences, on managed devices, on support hours, that never makes it onto a client invoice. It's quiet, it's rarely someone's fault, and it compounds every month it goes unnoticed.
What revenue leakage actually looks like
Revenue leakage isn't usually one big mistake. It's dozens of small ones scattered across your client base: a licence added in Pax8 that never made it onto the client's invoice, a device that's been under management for six months without a corresponding billing line, a price increase from a distributor that got absorbed instead of passed on. None of these look dramatic in isolation. Together, they're often the difference between a healthy margin and a thin one.
The most common sources
- Uninvoiced distributor seats: licences you're paying for that never reached a client bill
- Prorated mid-cycle changes: seat additions or removals billed partially by the distributor, but flat by you
- Distributor price increases at renewal that were never passed on
- Device count drift: an RMM shows more managed devices than the client is billed for
- Manual re-entry errors when moving numbers from a PSA or spreadsheet into an invoice
- Cancelled services still being paid for on the distributor side
How much does it cost?
MSPs who run a proper reconciliation process for the first time typically find they're leaking 2–8% of monthly recurring revenue, sometimes more if billing has been managed manually across a large client base for years without an audit. On a book of £50,000 MRR, that's £1,000–£4,000 a month sitting unbilled, month after month, until someone catches it.
The number matters less than the pattern: leakage doesn't go away on its own. Every month it's not caught is a month it repeats.
Why manual checks don't scale
Some MSPs run a quarterly billing audit, comparing distributor invoices to client bills line by line in a spreadsheet. It works, in the sense that it finds problems, but it's slow, it only catches issues after months of leakage have already happened, and it depends on someone having the time to do it thoroughly. As a client base grows, the audit either gets skipped or gets superficial, which is exactly when leakage gets worse.
Where reconciliation earns it back
Automated billing reconciliation replaces the quarterly spreadsheet audit with a standing check that runs every month, for every client, across every connected system. It catches the same categories of leakage, uninvoiced seats, prorated changes, price increases, but as they happen rather than a quarter or a year later.
Stopping the leak for good
The goal isn't a one-time cleanup, it's making sure the gap can't reopen. That means reconciling continuously rather than periodically, and invoicing directly from reconciled data so nothing gets rekeyed or missed in the handoff between systems. See how that connects through to invoicing in automated invoicing.