Maverick spend isn't just a procurement discipline problem — in food and beverage, one purchase outside the approved channel can introduce an unvetted substance into the plant. Here's the real formula, three ways to break it down, and the four root causes behind why teams bypass the process.
(Maverick spend / Total spend) x 100One row per purchase order line — supplier × material × commodity × plant × date
Maverick_Spend = purchase orders placed outside approved procurement channels — without a contracted supplier, without procurement approval, or below the delegated authority threshold with no documented justification; Total_Spend = all third-party expenditure.
emergency purchases below the materiality threshold with documented post-hoc approval; petty cash purchases below the defined threshold.
maverick spend in food manufacturing has a food safety dimension beyond the financial risk — a department head purchasing a cleaning chemical or food contact material outside the approved supplier list introduces an unapproved substance into the plant; maverick spend monitoring in F&B must flag food-contact and chemical categories as a priority alert, not just the financial value.
Numerator is maverick spend attributed to a specific department (e.g., Maintenance, Marketing, R&D). When to use it: To identify which functional leaders are bypassing the procurement process most frequently.
Calculate the rate separately for production materials (direct) and operational supplies (indirect, e.g., MRO, services). When to use it: To distinguish between high-risk maverick spend on ingredients versus lower-risk (but still costly) spend on operational items.
Tag each maverick transaction with a reason code: 'No Approved Supplier Exists', 'Process Too Slow', 'Approved Supplier OOS', 'User Preference'. When to use it: To diagnose whether the problem is a broken procurement process or a broken culture of compliance.
PO approval workflow is too slow for operational needs. When the ERP approval matrix requires multiple sign-offs for low-value, urgent purchases, it forces operational teams to either wait and stop production, or bypass the system entirely.
In the ERP, measure the average cycle time from 'PO Raised' to 'PO Approved'. If this exceeds 24 hours for items under $5,000, the process is too slow.
'PO Compliance Rate is 99%' in the internal audit report — this looks green because it only measures POs that entered the system, not the spend that bypassed it entirely via non-PO invoices.
Approved Supplier List is incomplete or out-of-date. If categories like MRO spares, specialist cleaning services, or lab consumables have no pre-vetted suppliers, every purchase is a forced maverick spend.
In the ERP AP module, segment maverick spend by commodity code or GL account. If more than 30% is concentrated in MRO, facilities, or other indirect categories, the approved list has major gaps.
'95% of direct material spend is with approved suppliers' — this looks green because it deliberately ignores the chaotic tail of indirect spend, where most maverick buying occurs.
No fast-track process for genuine emergencies. Without a pre-defined 'emergency buy' process that allows for rapid sourcing from a pre-qualified pool with streamlined approval, managers are forced to use the slow standard process or go completely off-system.
Review the procurement policy. If there is no documented procedure for 'Emergency Purchase Authorisation' that differs from the standard process, this gap is structural.
'Our procurement policy is applied consistently to all purchases' — this looks green from a compliance perspective, but it's precisely this rigidity that forces people to work outside the process.
Price premium from maverick spend is not charged to the originating department's budget. When the unfavorable Purchase Price Variance (PPV) from a maverick buy is booked to a central procurement or finance account, the department causing the overspend feels no financial pain, creating no incentive to change behaviour.
In the ERP Finance module, trace the accounting for PPV. If it's not allocated back to the originating cost centre of the PO, the accountability is broken.
'The Maintenance department was under budget last quarter' — this looks green because the 25% premium they paid for emergency spares was absorbed by a corporate variance account, not their own P&L.
Isolate and Analyze Top 20 Maverick Buys. Data is hidden in blended reports → Extract the top 20 maverick vendors by spend and interview the budget holders who used them → Classify root cause for each (process too slow, no supplier, quality failure) to create a factual basis for action.
Establish an 'Emergency Buy' Fast-Track. One-size-fits-all process forces bypasses → Define a streamlined approval workflow in the ERP for urgent buys under $5k from a pre-vetted 'emergency' supplier list → Reduces friction and captures data currently lost.
Attribute Maverick Premium to Originating Budget. Maverick cost premium is absorbed centrally → Configure ERP to automatically post the unfavorable PPV from non-contracted buys to the originating department's cost centre → Creates direct P&L accountability for managers who bypass the process.