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Supplier Risk

Vendor Spend Pareto Concentration

Plots cumulative spend concentration to expose over-reliance on a handful of suppliers.

📖 6 min read🎯 Intermediate✍️ Updated 2026

Why spend concentration is a governance and continuity risk

When a small number of suppliers absorb the majority of procurement spend, the institution faces both a competition concern and a business-continuity exposure that King IV frames as a strategic risk for the accounting authority. Concentration can be benign in specialised markets or symptomatic of captured procurement. AuditPro Core plots cumulative spend against supplier count so oversight bodies can see where reliance has become dependence.

The Numbers

AuditPro Core renders this view from your tenant's live, tamper-evident records. The figures below are illustrative sample data.

Top 10 Vendor Share

47%

▲ 5%

Top 1% Vendor Share

62%

Active Vendors

3,910

Single-Vendor Categories

18

Cumulative Spend Concentration %

Largest Suppliers by Spend

SupplierSpend (R'm)Share %Contracts
Vendor 21101849.47
Vendor 22311427.34
Vendor 23441186.15
Vendor 2455964.93

Figures shown are illustrative sample data for demonstration. AuditPro Core renders these views from your own tenant's live, tamper-evident records.

The Pareto lens

Pareto analysis ranks suppliers by spend and plots the cumulative share they account for. It quickly shows whether a handful of vendors dominate the procurement book.

Concentration as risk, not verdict

High concentration is not automatically wrong; some markets have few credible suppliers. It becomes a concern when it reflects limited competition, single-source habit, or relationships that resist contestation.

Continuity and pricing exposure

Heavy reliance on one supplier creates a single point of failure and weakens the institution's bargaining position. Both are matters the governing body should actively monitor.

How AuditPro Core Bridges the Gap

  • Concentration curve: ranks suppliers and plots cumulative spend share to expose dominance at a glance.
  • Threshold alerting: flags where a few suppliers exceed a defined share of total spend.
  • Drill-down traceability: links each dominant supplier to its contracts and award history.
  • Audit-ready export: packages the concentration profile for governing-body and audit-committee reporting.

Key Takeaways

  • Concentration is a continuity and competition risk, not an accounting error.
  • Few credible suppliers can justify concentration; captured procurement cannot.
  • Dominance by a handful of vendors warrants governing-body attention under King IV.
  • Pair the curve with award history to test whether competition is real.

See This on Your Own Data

AuditPro Core renders this dashboard from your tenant's live, tamper-evident records — every figure traceable to source.