What is maverick spend?

Maverick spend is purchasing that happens outside approved contracts, preferred suppliers, or the procurement process the organization agreed to use. It includes buying from a non-contracted supplier when a contract exists, using a contracted supplier but at terms outside the agreement, and purchasing without any contract or approval in place. The common thread is that the transaction bypasses whatever controls the team set up.

The damage is not always dramatic. The largest cost is usually the negotiated price that was never used. If a buyer signed a volume discount with one supplier and a department orders the same item from another at list price, the line-by-line spend looks normal. The loss only appears when someone compares what was paid against what the contract would have charged — exactly the comparison that PO price variance is designed to catch.

Maverick spend also weakens savings realization. A reported saving based on a new contract rate only holds if buying actually shifts to that contract. When spend leaks to other suppliers or unapproved channels, the reported number stays on the slide deck while the realized number quietly falls short.

Classify before you measure. The first step is not calculating how much maverick spend exists. It is deciding which transactions count as on-contract, off-contract, and no-contract. Without that classification, a spend report can show the right totals and still hide the leakage underneath.

AI can help with the first-pass classification. Matching a transaction to a contract requires checking supplier, item category, unit of measure, and pricing terms. That is repetitive, rules-based work where a model can flag mismatches faster than a manual review — but the flags need a buyer to confirm, because a mismatch is not always a violation.

Look at why before you enforce. Some maverick spend is a policy failure. Some is a coverage gap — no contract existed, or the contract did not include the item. The response is different: one needs compliance, the other needs sourcing. A useful classification separates the two.