You spend weeks negotiating a strong contract. You book the saving, report it, move on. Then half the organisation keeps buying somewhere else anyway — and the saving you reported never fully reaches the bottom line.
That gap has a name: maverick spend. It is the single quietest way negotiated savings die — not in a dramatic failure, but in a thousand small purchases made off-contract, off-process, and off the radar. It is rarely talked about because it is uncomfortable: it means the value procurement claimed and the value the business actually realised are not the same number. This guide explains what maverick spend is, what it really costs, why it happens (it is almost never malice), and the practical playbook to bring it under control.
What maverick spend actually is
Maverick spend is any purchasing that happens outside agreed contracts, preferred suppliers, or proper process. It takes three main forms:
- Off-contract — buying from a non-preferred supplier, at list price, when a negotiated contract already exists for that item.
- Off-process — bypassing the purchase order, approval, or procurement involvement entirely; the invoice simply appears.
- Tail sprawl — a long tail of one-off, uncontrolled small purchases that individually seem trivial and collectively are not.
Why it matters goes well beyond price:
- It erodes the savings you negotiated — directly, dollar for dollar.
- It loses volume leverage — spend that should have consolidated onto your contract leaks away, weakening your position at the next renewal.
- It destroys spend visibility — you cannot analyse, forecast, or negotiate spend you cannot see.
- It raises risk — unvetted suppliers, no agreed terms, compliance gaps, and an open door to fraud.
The real cost: a worked example
The cleanest way to see maverick spend is to watch it eat a negotiated saving. Take an indirect category with annual demand worth €2,000,000 at list price, on which you negotiated a 12% discount.
| Full compliance | Reality: 30% maverick | |
|---|---|---|
| On-contract demand (at list) | 2,000,000 | 1,400,000 |
| Paid on contract (−12%) | 1,760,000 | 1,232,000 |
| Maverick spend (at list, no discount) | 0 | 600,000 |
| Total paid | 1,760,000 | 1,832,000 |
| Saving vs list | 240,000 | 168,000 |
| Savings leaked | — | 72,000 |
You reported a €240,000 saving. Because 30% of the spend went maverick — at full list price — only €168,000 actually reached the P&L. The leak equals the maverick rate: 30% of spend off-contract leaks 30% of your savings. And this is the optimistic version: it ignores the volume rebate tier you may have missed because on-contract volume fell below the threshold, and the higher process cost of handling one-off, off-PO purchases.
Maverick spend is routinely one of the largest unmanaged leaks in indirect procurement — and it sits in plain sight, inside categories you thought you had already “saved”.
Why it happens — and why it is almost never malice
The instinct is to blame discipline. That instinct is wrong, and acting on it makes the problem worse. People go maverick because the compliant path is harder than the alternative:
- Speed and urgency. The proper process is too slow for a need that is real and immediate. The buyer chooses getting the job done over following the rule.
- Friction. The contract is hard to find, the system is clunky, the catalogue is buried. The path of least resistance leads off-contract.
- Ignorance. People simply do not know a contract exists. New joiners especially keep using “their” old supplier.
- Catalogue gaps. The exact item or specification is not on contract, so the only way to get it is to go off-contract. This is maverick-by-design — the process forces it.
- Culture. Procurement is seen as a blocker rather than a service, so the business routes around it.
The unifying insight: maverick spend is a symptom, and the disease is process friction. Fix the friction and most of it disappears; punish the symptom and it goes underground, where you can no longer even measure it.
You cannot control what you cannot see: measure it first
Before any fix, establish the baseline. Spend analysis gives you the metrics that matter:
- % off preferred supplier — spend with non-contracted suppliers in categories that have a contract.
- % off-PO — invoices with no matching purchase order.
- % off-catalogue — purchases outside the guided-buying catalogue.
Measure these per category and per business unit. The picture almost always surprises people — and it tells you exactly where the leaks are, so you fix the worst first rather than spreading effort evenly. (Building this view is the core of Procurement Analytics with Excel and Power BI.)
The playbook: make the right way the easy way
The winning principle is carrot before stick: make compliance the path of least resistance, then close the door on the alternative. In order of impact:
- Make the compliant path effortless. Catalogues and punch-out to preferred suppliers, guided buying, and purchasing cards for low-value tail spend so small, urgent needs have a fast, compliant route. If buying on-contract is the quickest option, maverick spend collapses on its own.
- Close the catalogue gaps. Audit what people buy off-contract and ask why. Often the item simply is not available on contract — so onboard the suppliers and items people actually use. You cannot demand compliance with a contract that does not cover the need.
- Communicate and train. People must know the contracts exist. A simple, findable directory of “who to buy what from”, reinforced for new joiners, removes the ignorance cause entirely.
- Introduce visibility and a no-PO-no-pay policy. Require a purchase order for payment, and give budget owners visibility of their own maverick spend. Most managers tighten up the moment they see their leakage quantified against their budget.
- Have a tail-spend strategy. The long tail is where most maverick hides. Aggregate it onto fewer suppliers, use catalogues and P-cards, or outsource tail management entirely. (This is central to the Indirect Procurement Masterclass.)
Cause and fix at a glance
| Why it happens | The fix |
|---|---|
| Process too slow for an urgent need | Fast-track approval; P-cards for low-value tail |
| Contract hard to find / clunky system | Catalogues, punch-out, guided buying |
| Nobody knows a contract exists | Communication, training, supplier directory |
| Item not on contract | Expand catalogue coverage; onboard used suppliers |
| Procurement seen as a blocker | Service mindset, response SLAs, make compliance easy |
| No consequence for going off-contract | No-PO-no-pay; maverick spend visible to budget owners |
Carrot and stick — in that order
Pure enforcement fails. If you bolt the door without fixing why people leave through the window, they find a new window — and you lose visibility of where they went. Conversely, an all-carrot approach with no accountability never quite closes the last gap. The sequence that works: make compliance the easy choice first, so that by the time you introduce a firm no-PO-no-pay policy, you are closing a door almost nobody needs to use anyway.
Common mistakes to avoid
- Treating it as a discipline problem. It is a process problem wearing a discipline mask.
- Enforcement without fixing friction. Drives maverick spend underground, where it is invisible and uncontrolled.
- No baseline. Without measurement you cannot target the worst leaks or prove improvement.
- Catalogue gaps left open. You force people off-contract, then blame them for going.
- Assuming people know. Unannounced contracts are, in practice, no contracts.
- Ignoring the tail. “Too small to matter” — individually true, collectively the biggest hiding place.
Key takeaways
- Maverick spend is the quietest way negotiated savings leak away before they reach the P&L.
- The leak scales with the rate: 30% off-contract spend ≈ 30% of your savings gone — plus lost rebates and process cost.
- It is almost never malice — it is process friction. Fix the friction, not the people.
- Measure first (% off-preferred, off-PO, off-catalogue), then target the worst categories.
- Win with carrot before stick: make the compliant path the easiest path, then close the door.
