Concentration risk is the exposure that comes from over-dependence on a small number of vendors, customers, or geographies for a large share of the business. When any single counterparty carries an outsized share of spend or revenue, a shock at that counterparty becomes a shock to the balance sheet.
How concentration risk shows up
A wholesaler generates half of its revenue from its top three customers and two-fifths of its purchases from one manufacturer. Losing either the customer or the supplier disrupts more than half of monthly cash flow. The exposure is the concentration risk.
A useful test: rank vendors by spend and customers by revenue, then measure the share held by the top five of each. Any counterparty holding more than a fifth of the total is a concentration risk that finance should model, not ignore. The purpose is not to break relationships, it is to price the fragility they create and hold contractual protection accordingly.
Where concentration risk appears in contracts
Concentration risk sits inside procurement contracts, supply agreements, customer master service agreements and framework deals. Watch for exclusivity clauses, single-source provisions, minimum-volume commitments and change-of-control triggers - each one deepens the concentration. Balance them with continuity clauses, dual-sourcing rights and step-in rights so the contract financial truth reflects both the value and the fragility of the relationship. Unhedged concentration is a top source of contract value leakage.
Concentration risk FAQ
How is concentration risk measured?
By the share of spend or revenue held by the top counterparties. A common threshold is any single counterparty above one-fifth of the total.
Is concentration risk always bad?
No. It typically reflects a strategic relationship. The risk is the unhedged exposure, not the relationship itself.
How does concentration risk connect to contract economics?
It sits at the top of the contract economics stack because a single counterparty failure can rewrite the P&L overnight.
