Invoice Finance vs Supply Chain Finance: A Complete Guide for UK SMEs

Invoice finance lets you unlock cash tied up in your own unpaid invoices. Supply chain finance lets your buyers offer early payment to their suppliers, funded by a lender. Both improve working capital but from opposite ends of the transaction. This guide explains how each works, who qualifies, what each costs, and how to choose the right option for your UK business.

What is invoice finance and how does it work?

Invoice finance is an umbrella term covering invoice factoring and invoice discounting. In both cases, you raise an invoice to a customer, assign it to a lender, and receive an advance of most of the invoice value; how much varies by lender. The remaining balance, less fees, is released once your customer pays.

With factoring, the lender manages your sales ledger and chases payment on your behalf. With discounting, you retain control of credit control and the arrangement is usually confidential. Invoice finance for limited companies is generally not a regulated activity.

Minimum turnover varies by lender: some publish none, others ask for £750,000 or £1m. The key eligibility test is the quality and value of your debtor book, not the size of your balance sheet. Many lenders also take a debenture, which is registered at Companies House.

What is supply chain finance and how does it work?

Supply chain finance, also called reverse factoring or approved payables finance, works in the opposite direction. A large buyer, often a retailer, manufacturer or public sector body, sets up a programme with a lender. Suppliers who sell to that buyer can then request early payment of approved invoices through the programme's online platform.

Because the lender is advancing money against the buyer's obligation to pay, the credit risk is assessed on the buyer's credit rating rather than the supplier's. This means the discount rate applied to early payments is typically lower than what a small supplier could obtain independently through invoice finance.

The buyer still pays on its normal terms, now to the lender, while the supplier can take its money early once the invoice is approved. Programmes are run by banks and specialist platforms on behalf of large buyers; ask your buyer who runs theirs. Check the accounting treatment with your accountant or auditor before you join.

How do the costs compare?

Cost structures differ significantly between the two products, and understanding this is essential before committing to either.

Invoice finance usually carries a service charge plus a discount charge on the money you draw, set as a margin over the Bank of England base rate (currently 4%). There may also be minimum monthly fees, audit fees and payment charges. Most lenders do not publish their rates, so you need a quote.

Supply chain finance can be cheaper for a small supplier, because the rate is based on the buyer's credit standing rather than the supplier's. Whether it is cheaper for you depends on the rate the programme offers and the rate you could get on your own; compare the two in pounds on the same invoice.

However, supply chain finance only applies to invoices approved by the buyer. If a buyer disputes or withholds approval, the supplier cannot draw early payment. Invoice finance gives you more autonomy because you control which invoices you raise and when you fund them.

Eligibility: who qualifies for each product?

Invoice finance eligibility is assessed primarily on your debtor book. Lenders look at the spread of debtors, average invoice values, payment history, and the proportion of invoices that are overdue or disputed. Businesses with one or two dominant customers, very small invoice values, or a high level of contra trading may find eligibility restricted or pricing elevated.

You will also need to pass standard KYC checks: Companies House registration, confirmation of beneficial ownership under the Money Laundering Regulations 2017, and satisfactory personal credit checks on directors. Lenders set their own trading history rules; ask each one.

Supply chain finance eligibility, from the supplier's perspective, is simpler. If your buyer runs a programme and your invoice has been approved in their system, you can request early payment. The checks on the supplier are usually lighter, because the lender is relying on the buyer. The barrier is whether your buyer runs a programme at all; they are usually run by large companies.

Which product fits which situation?

If you invoice several business customers and want to draw cash as soon as you raise each invoice, invoice finance fits, and you are not relying on any buyer to run a programme. If you sell to a large buyer that runs a supply chain finance programme, joining it may let you get paid early at a rate based on that buyer's credit standing.

In practice, many businesses end up using both. A company supplying one large buyer through their supply chain finance programme may still use invoice finance for the remainder of their ledger. The two products are not mutually exclusive, but you should check with your invoice finance lender whether invoices covered by a supply chain finance programme are excluded from your facility, as some debentures will conflict.

Key risks and things to watch

Invoice finance carries concentration risk. If one large customer makes up a big share of your ledger, a lender may set a limit on how much it lends against that customer. If that customer pays slowly or disputes invoices, your available funding drops sharply.

Supply chain finance carries programme dependency. If your buyer withdraws the programme, is acquired, or changes lender, your access to cheap early payment disappears at short notice. The collapse of Greensill Capital in 2021 illustrated this risk vividly, leaving some UK suppliers without expected liquidity overnight. Always maintain an alternative working capital facility as a backstop.

Both products require careful attention to your debenture and any fixed and floating charge registered at Companies House. An existing charge in favour of a high street bank may prevent you from assigning your receivables to an invoice finance lender without the bank's consent. Take legal advice if you are unsure whether your existing banking documents restrict your ability to use either product.

How to choose and what to do next

Start by mapping your debtor book. If you invoice multiple customers across different sectors and need flexible, ongoing working capital, invoice discounting or factoring is likely to be the better fit. If you supply one or two large buyers who already operate supply chain finance programmes, enquire directly with their procurement or treasury teams about joining.

Get at least two or three quotes for any invoice finance facility and compare them line by line, looking at the advance rate, discount charge margin, service charge, minimum fees and any additional charges. Ask each lender to confirm whether participation in a buyer's supply chain finance programme would affect your facility eligibility.

If you are a finance director weighing up both options simultaneously, model the annual cost of each against your average debtor days and turnover. The arithmetic is usually straightforward and the difference in annualised cost can be significant. A broker can help you compare terms without approaching lenders one by one. Always ask whether the broker charges you a fee or is paid by the lender.

Checklist

• ☐Map your debtor book: number of customers, average invoice value, payment terms and how much goes to your biggest customer
• ☐Confirm whether any existing bank debenture restricts assignment of receivables before approaching any new lender
• ☐Ask your largest buyers whether they operate a supply chain finance programme and on what terms suppliers can join
• ☐Obtain at least three invoice finance quotes and compare advance rate, discount margin, service charge and minimum fees side by side
• ☐Model the annualised cost of each option against your average debtor days to identify the cheaper source of working capital
• ☐Take accountancy advice on how supply chain finance will show in your accounts before you join a programme

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