Reducing Financial Risk in Decentralised Purchasing

Decentralised purchasing is often not a failure of governance, but a deliberate structural choice.

Time and again, organisations will delegate buying authority to business units and regional teams to preserve speed and operational agility. The problem is that agility, when unmonitored, generates cost.

Maverick spend – purchases made outside approved procurement processes – can cost organisations between 5% and 16% of negotiated savings annually, according to research conducted by the Hackett Group.

For a large enterprise, that figure can represent real, material financial exposure.

The core issue is visibility. Without knowing the who, what, why, where, when and how of spending across a business, those responsible for managing budgets are left with large gaps in knowledge.

What's more, these are gaps that reduce a business' ability to conduct effective spend analysis and set realistic targets.

The importance of visibility

Finance cannot model what it cannot see, and untracked spend corrupts both budget forecasting and cash flow planning.

According to Kodiak Hub, more than two-thirds of procurement professionals report that fragmented, off-contract purchasing erodes their sourcing leverage.

Meanwhile, the concentration of spend with preferred suppliers – and the pricing agreements that accompany it – depends on those suppliers actually being used.

All in, statistics from Zoho show that maverick spend can account for up to 80% of invoices in organisations that lack proper controls.

That may sound fanciful to CFOs, but the numbers do not lie.

Shadow spend – purchases made on personal cards and later reimbursed – does not appear in any procurement system at all.

Similarly, non-PO invoices often slip through accounts payable without matching to an approved requisition.

And while each transaction may be modest, they all add up to a significant total that can spiral out of control if left unaddressed.

What can be done to address maverick spend?

The answer is not to strip departments of purchasing autonomy. Instead, it is to make the invisible visible.

Automated expense management systems are able to flag non-compliant purchases in real time, which allows finance departments to intervene before reimbursement or payment is processed.

Elsewhere, spend analytics platforms, several of which now incorporate machine learning, can identify patterns that manual reviews often miss entirely.

These patterns might include:

• Duplicate vendor relationships
• Category spend that bypasses preferred contracts
• Payment terms that drift from what was negotiated.

Policy-driven controls and approval workflows

The truth is, when procurement policy fails it is not because it is wrong, but because it is inconvenient.

When the compliant path takes longer than the non-compliant path, employees are more inclined to take a shortcut.

This is a design problem, not a cultural one.

CFOs who attempt to address it through training campaigns alone tend to find limited traction. Behaviour changes when the system changes.

Effective policy-driven procurement can make the compliant option the easiest option. Pre-approved vendor catalogues remove the friction of supplier discovery, while guided buying tools steer users towards contracted suppliers automatically.

According to Zoho's reporting, AI-driven workflows can approve low-value items instantly, reducing cycle times from days to under 24 hours.

But policy must also be proportionate. Eliminating unnecessary approval layers for low-risk, low-value purchases reduces the incentive to bypass the system entirely.

The approval workflow itself is one of the most underused controls in the finance function.

By enforcing three-way matching – connecting purchase order, goods receipt and invoice before payment is released – eliminates much of the non-PO spend that accounts for the majority of maverick activity.

Where workflows are rules-based and digitised, exceptions surface immediately rather than in a quarterly audit, and persistent threshold breaches often signal a legitimate need for contract renegotiation rather than simple non-compliance.

This article is brought to you in association with Amazon Business.

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