Factoring companies cap how much of any single customer’s unpaid invoices they will count toward your funding. Debtor concentration limits in factoring typically fall between 10 and 20 percent of your total eligible receivables per customer, and federal banking regulators treat a portfolio as concentrated once any one account crosses the 10 percent mark.1Office of the Comptroller of the Currency. Accounts Receivable and Inventory Financing Anything above the cap still exists as a receivable the factor has a security interest in, but it stops generating cash advances until the customer pays down the balance.
What the Cap Actually Restricts
The concentration limit is a ceiling on eligibility, not on the invoice itself. The factor still takes the invoice as collateral and still handles collection. What changes is the borrowing base: only the portion of a customer’s balance that sits within the cap counts toward the pool the factor advances against.
Each customer gets its own sub-limit. The factor sets an overall credit facility for your account and then assigns individual ceilings to each debtor based on that debtor’s payment history, total exposure, and creditworthiness. Those sub-limits are not permanent. If a customer’s financial condition deteriorates during the contract, the factor can lower that customer’s cap immediately, and the agreement typically gives it discretion to do so without renegotiation.
How the Borrowing Base Math Works
Available funding comes from a two-step calculation: eligible receivables multiplied by the advance rate. Concentration limits govern the first step.
Say you have $500,000 in total receivables and a 15 percent concentration limit per customer. No single customer can contribute more than $75,000 to your eligible pool. If your largest customer owes you $200,000, the extra $125,000 sits outside the calculation entirely. Applying a typical advance rate — factoring advances usually run between 70 and 90 percent — of 85 percent to the $75,000 eligible portion yields $63,750 in immediate funding tied to that customer. The rest waits.
The calculation is not a one-time snapshot. Factors recalculate the borrowing base regularly, often daily, adjusting available credit as invoices come in, payments arrive, and eligibility shifts.1Office of the Comptroller of the Currency. Accounts Receivable and Inventory Financing A large new invoice from a concentrated customer can push you over the cap overnight and immediately shrink the cash you can draw.
What Determines Each Customer’s Cap
Not every customer gets the same ceiling. Factors adjust individual caps based on several inputs, and understanding them gives you room to negotiate.
- Credit strength. A customer with strong financials and investment-grade credit sometimes qualifies for a cap well above the standard range. Large corporations, hospital systems, utilities, and government-adjacent entities tend to earn higher ceilings.
- Payment history. Consistent on-time payments build the case for a higher cap. A customer that pays at 35 days on 30-day terms is a different risk than one paying at 75 days.
- Industry volatility. Customers in cyclical or distressed sectors face tighter caps regardless of their own numbers.
- Your overall customer mix. If your business depends on five major accounts, the factor may allow somewhat higher individual caps but will scrutinize those accounts closely. Hundreds of small customers reduce the argument for granting any one of them a large share.
- Existing liens. Factors review UCC filings and public records. A customer already encumbered by multiple creditors is a weaker collection prospect and gets a lower cap.
Cross-Aging: Why a Late-Paying Customer Costs More Than the Late Invoices
Cross-aging is the provision that turns a manageable concentration problem into a serious one. Most factoring agreements say that if a certain percentage of a customer’s invoices go past due, every invoice from that customer gets reclassified as ineligible, not just the late ones. A common threshold is 50 percent of a customer’s receivables aged past 90 days, though the OCC references a 10 percent delinquency rule in some agreements.1Office of the Comptroller of the Currency. Accounts Receivable and Inventory Financing
The consequence is disproportionate. Suppose your largest customer represents 18 percent of your receivables and sits inside the concentration limit. If that customer starts paying slowly and enough invoices age past the cross-aging trigger, the full 18 percent drops out of the borrowing base at once. The hit is not proportional to the late portion; it is total for that customer. For a business already skewed toward a few big accounts, one tripped cross-aging clause can cut available funding by a fifth in a single reporting cycle.
What Happens When You Exceed the Cap
When an invoice pushes a customer past the concentration ceiling, the excess becomes ineligible. The factor does not reject the invoice; it takes a security interest in the full amount and manages collection as it would any other invoice. But the funding advance applies only to the portion within the cap.
The practical effect is a cash gap. If you were counting on $30,000 from a customer and the cap only allows $20,000 as eligible, you get an advance on $20,000 and wait for the balance to move down before more of that customer’s invoices become eligible. For a business timing payroll or materials orders against expected advances, that delay is real operational pressure.
Persistent over-concentration signals a structural issue. Factors watch for it. A repeated pattern of pushing against the cap on the same customer can lead to higher fees, a lower advance rate, or a renegotiation of terms. If the situation has already produced an over-advance, meaning the factor advanced more than the current borrowing base supports, the factor can demand immediate repayment of the excess. That demand functions like a margin call and rarely arrives at a convenient moment.
How Recourse and Non-Recourse Change the Strictness
The type of factoring arrangement shapes how the concentration rules actually bite.
Recourse factoring means you guarantee the invoices. If a customer does not pay, the factor charges the invoice back to you or requires a substitute receivable. Because the factor has that backstop, recourse agreements tend to be more flexible on concentration caps and customer credit standards.
Non-recourse factoring shifts specified credit risks to the factor, typically covering customer insolvency during the contract window. The factor absorbs the loss if a covered customer goes bankrupt. That exposure makes non-recourse factors significantly stricter: they approve coverage customer by customer, run tighter credit reviews, and cap per-account exposure at lower thresholds. Disputes, documentation issues, and delivery problems stay your responsibility even under non-recourse terms.
Businesses with heavy concentration often find non-recourse coverage either unavailable or expensive for their largest accounts. A factor is not going to accept 40 percent of a portfolio riding on one customer’s solvency when it bears the loss.
Using Credit Insurance to Raise a Cap
Trade credit insurance, sometimes called accounts receivable insurance, is the most direct lever for loosening a concentration cap. The policy covers losses from customer non-payment due to insolvency or protracted default. When the factor knows a large customer’s receivables are insured, its downside from that customer’s failure shrinks, and it becomes more willing to grant a higher sub-limit.
The mechanism runs through an assignment of insurance proceeds. Your factoring agreement directs any payout to the factor first, covering outstanding advances. Lenders that otherwise limit borrowing capacity based on customer concentration may allow higher advances, sometimes at better rates, when receivables carry insurance coverage.2Allianz Trade. Accounts Receivable Insurance: How it Works, the Benefits and Costs
Premiums typically run around 0.25 percent of insured sales, with actual pricing driven by industry, customer mix, and claims history. For a business whose largest customer accounts for a significant share of revenue, the premium can pay for itself by unlocking factoring advances that would otherwise be blocked by the cap.
Managing the Constraint
The most useful approach is treating concentration limits as a planning constraint, not an accounting technicality. A few steps make the biggest difference.
- Diversify deliberately. Spreading revenue across more customers is the structural fix. Not turning away big customers, but investing in the sales channels that bring in smaller ones to balance the portfolio.
- Negotiate with data. Factors will consider raising a customer’s cap when you can show consistent on-time payment history, long-term contracts, and stable financials on that customer. Bring records to the conversation.
- Line up credit insurance before you need it. A policy already in force is a stronger negotiating position than a policy you are buying because the factor flagged a problem.
- Watch your own aging report. Do not wait for the factor to tell you a customer is nearing the cap. Track it yourself and plan around funding gaps before they hit.
- Consider splitting factors. Some businesses route concentrated customers to factors that specialize in that customer’s industry, using more than one factoring company to expand total available funding. It adds administrative work but can open capacity that a single factor will not extend.
A common rule of thumb is keeping your largest customer below 20 percent of total revenue. Businesses that let a single customer grow past that point often discover the factoring constraint only after the concentration has already become a problem, when the options are narrower and more expensive.