What Is a Credit Limit in Factoring?

Why This Matters

Credit limits in invoice finance determine exactly how much cash you can unlock from each customer relationship, making them a critical constraint on working capital. Unlike a simple facility limit (the total you can borrow), credit limits work at debtor level.

If your biggest customer has a £100,000 credit limit but you invoice them £200,000 in a month, only half that invoice ledger generates cash advance. This creates a practical ceiling unrelated to your own creditworthiness. For rapidly growing UK SMEs, especially those concentrated on a handful of large customers, debtor credit limits often become the binding constraint before the overall facility limit.

Understanding how providers assess these limits, what triggers reviews, and how to influence them is essential for cash flow planning. A manufacturer supplying a national supermarket might assume their £500,000 facility means £500,000 available, but if the supermarket's individual credit limit is £150,000, that's the real constraint.

Credit limits also reveal your provider's risk appetite for your customer base. A provider nervous about retail might cap limits on high street names, while another actively seeks that exposure. Getting this right at setup prevents nasty surprises when your largest invoice doesn't unlock the cash you budgeted for.

How to handle credit limits in factoring

1. Ask for the limits before you sign. Get the proposed limit for each of your main customers in writing, and set it against what you usually invoice each one in a month.
2. Ask about a concentration limit too. This is a separate cap on how much of your whole ledger can be owed by one customer. It matters most if one or two customers make up most of your sales.
3. Work out what you can really draw. Multiply the amount the lender will count for each customer by your advance rate. The worked example below shows how.
4. Plan for the excess. Invoices above a customer's limit still get paid when the customer pays, but you get no advance on them, so leave room for that in your cash flow.
5. Ask for a review when things improve. If a customer has paid well for a year or its accounts are stronger, ask the lender to look at its limit again, and send the evidence.
6. Compare lenders. Lenders set limits in different ways, and some say they apply no concentration limit at all, so get more than one quote if one customer dominates your sales.

A worked example with a concentration limit

Sonovate, a lender to recruitment agencies, gives this example. An agency invoices £200,000, all to one client. Its facility has a 40% concentration limit and a 90% advance. The lender counts only 40% of the ledger, so the "eligible debt" is £200,000 x 40% = £80,000, and the agency can draw £80,000 x 90% = £72,000. As Sonovate puts it: "if your concentration limit is 40% and your total ledger is £200,000 then the lender will only consider £80,000 of funding with any single debtor" (Sonovate, read 21 October 2026). Sonovate says its own facility has "no concentration limits", which is one reason to ask each lender how it works.

For what factoring costs on top, see our invoice finance costs guide, and for how factoring differs from discounting, invoice factoring vs invoice discounting.

Key Points

• Each debtor gets an individual credit limit based on their creditworthiness, not yours. A York packaging firm with strong financials might find their pub chain customers capped at £20,000 each due to sector concerns, while corporate customers get £100,000 limits.
• Credit limits are set when the facility starts and can be reviewed later, for example after payment problems or when you ask for an increase. Reviews can move limits up or down.
• Concentration matters. Many lenders also cap how much of your ledger one customer can make up, as a percentage of the whole (the worked example above uses 40%).
• The limit rests on the lender's own credit check of your customer, such as its filed accounts and payment record. A customer in financial trouble may get a very low limit or none.
• You can invoice above the credit limit, but only receive advance funding up to the limit. The excess sits in your sales ledger and you get paid when your customer settles, minus the provider's charges.
• Different providers have different risk appetites. One provider might cap a construction sector debtor at £30,000 while another with construction expertise offers several times that on the same debtor. Shopping around matters.
• Limits are fungible across invoices to the same debtor. If Customer A has a £50,000 limit and you have three outstanding invoices totalling £80,000, you get advance on £50,000 of that ledger, not £50,000 per invoice.

Illustrative Example

Common Pitfalls

• Assuming your facility limit equals available cash. A £500,000 facility with ten £40,000 debtor limits only unlocks £400,000 maximum. Always map debtor limits against actual invoicing patterns before signing.
• Ignoring limit reviews after customer improvements. If a customer's credit improves or it pays consistently early, ask for a higher limit rather than waiting for the lender to offer one.
• Concentrating sales on low-limit customers. Two £200,000 customers are usually better than ten £40,000 customers from a funding perspective, assuming the larger customers get proportionate limits.
• Failing to negotiate limits at setup. Providers start conservative. If you have evidence of strong payment history with a debtor (aged debtor reports, bank statements showing regular payments), present it upfront to secure higher initial limits.
• Not understanding cross-guarantees in groups. If you invoice a subsidiary but the parent company is the credit risk, ensure the limit reflects the parent's strength, not the often-unrated subsidiary entity.

What to Do Next

• Request a debtor limit schedule before signing any invoice finance agreement. Map your top 10 customers' proposed limits against typical monthly invoicing to identify gaps. If limits cover less than 80% of your regular invoicing, negotiate upfront or consider a different provider.
• Build a quarterly limit review into your finance calendar. Compile evidence for any debtor where payment performance or credit profile has improved (Creditsafe score increases, faster payment patterns, published improved accounts). Formal review requests with evidence get better results than informal asks.
• If one or two debtors dominate your sales, get quotes from at least three providers. Risk appetite varies dramatically. One provider might cap your construction sector customer at £50,000 while another offers more than twice that on the same debtor. The difference directly impacts your available working capital.

Setting your own credit limits on new customers before you invoice them? Our credit application form template covers the details to collect and the checks to run.

Related Questions