Invoice Factoring: How Customer Concentration Affects Funding

What customer concentration means

Customer concentration describes dependence on a small number of buyers. The OCC’s Asset-Based Lending handbook explains that concentration can arise when a few customers generate most receivables or sales are concentrated in one industry. It discusses limiting concentrated accounts or reducing advance percentages as ways banks can manage the risk. [1]

That handbook addresses bank asset-based lending. Its numerical guidelines should not be treated as a universal factoring limit. Factoring involves purchasing receivables: the CFPB’s description refers to claims for payment for goods already supplied or services already performed. [2] For a proposed factoring arrangement, ask the provider to identify its own customer approval process and limits in writing.

Measure each customer’s share of outstanding invoices

GoodToGo Capital’s practical recommendation is to prepare a snapshot showing total unpaid invoices and the amount owed by each customer on the same date. Divide a customer’s outstanding balance by the total to find its share. For example, $70,000 owed by one customer out of $100,000 total receivables represents 70% concentration.

Use outstanding balances for this calculation rather than substituting annual sales. A customer that pays quickly may account for a large share of sales but a smaller share of unpaid invoices on a particular date. Keep a separate view of sales concentration so the provider can see both the longer business relationship and the current receivables position.

Ask for a dollar calculation after customer limits

Request a worked calculation showing the invoices the factor would purchase, any customer-specific limit, and the amount on which the advance percentage applies. Ask whether a stated limit is measured against all receivables, approved receivables, purchased invoices, or outstanding advances. Those descriptions can produce different results.

Consider a simplified hypothetical offer with a fixed $50,000 limit on eligible invoices from the largest customer. Your ledger has $70,000 from that customer and $30,000 from other customers. If all other invoices qualify, the amount eligible under that assumed limit is $80,000. An assumed 85% advance would produce $68,000 before fees or other deductions, compared with $85,000 if the entire $100,000 qualified. The difference is $17,000. These are illustrative terms, not an offer or an industry standard.

Check how availability changes as invoices are paid

Ask the factor to explain what happens when smaller customers pay first, a new large invoice is issued, or the largest customer pays late. Request an updated example for each situation. Find out whether the provider reviews limits periodically and whether additional invoices require approval before you expect cash from them.

Ask how related customer entities are grouped and what evidence is needed to establish who owes each invoice. If an exception is discussed, clarify its amount, duration, conditions, and written approval. Build your cash plan around confirmed terms while any exception remains under review.

Plan for the customer payment and the funding decision

Test two separate questions: what if the customer pays later than expected, and what if the factor accepts fewer invoices than you expected? Put each scenario beside payroll, supplier bills, and existing obligations. This makes the size and timing of the potential cash gap visible without assuming that every receivable will generate an advance.

Bring the customer breakdown and the requested calculation to the funding conversation. A strong customer relationship is useful context, but the written arrangement determines which invoices are accepted and how availability is calculated. Resolve those details before making spending commitments that depend on the proceeds.

Sources

General educational information. Consider your business’s circumstances and the written terms of any offer.