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Invoice finance: turn unpaid B2B invoices into working capital

Factoring, discounting and selective funding can shorten the cash wait. Eligibility, recourse and customer concentration determine how reliable that funding really is.

Published
Reading time
9 min read
80–90%
illustrative initial advance, not a promise
B2B
the strongest fit for credit sales
2 costs
service fee plus funding charge are common
Business administrator organising invoices with a calculator and clipboard
Customer payment timing affects the working capital available.

Invoice finance advances cash against eligible unpaid customer invoices. It can expand with a growing sales ledger and reduce the delay between delivery and payment, but it depends on the quality of the invoices and customers behind them.

Section 01

The basic cash flow

After the business raises an eligible invoice, the provider makes an initial advance. When the customer pays, the provider releases the remaining balance after deducting funding and service charges. The facility changes as invoices are raised, paid, aged or made ineligible.

The provider is advancing against a receivable, not the company’s forecast sales. Work must normally be completed and the invoice undisputed. Pro-forma invoices, stage payments, consumer receivables and very old debts may be excluded.

Section 02

Factoring, discounting and selective finance

Factoring usually includes credit-control and collections support and is commonly disclosed to customers. This can save administration but changes the customer experience. Invoice discounting provides the funding while the business retains day-to-day collection, and it can be confidential where the provider and process allow.

Selective or spot finance funds chosen invoices or customer accounts rather than the whole ledger. It can reduce commitment, but single-invoice pricing may be higher and the provider will still test the customer, documentation and risk of set-off or dispute.

Warehouse manager checking boxed stock on shelves using a tablet
Plan stock purchases around orders and available working capital.

Section 03

Recourse changes who carries bad-debt risk

With recourse invoice finance, the business remains responsible if the customer does not pay. Once an invoice passes the provider’s ageing limit, its advance may be deducted from availability or reclaimed. That can create a cash call at the moment the business is already dealing with a bad debt.

Non-recourse or bad-debt-protected facilities can cover defined credit risks, but exclusions, credit limits and disputes matter. Protection does not mean every unpaid invoice is insured. Read the policy and funding agreement together.

Section 04

What controls availability?

The headline advance percentage applies only to eligible invoices and often after reserves. Providers may limit exposure to one customer, one sector, exports, contractual rights of set-off or debt beyond a certain age. If one customer represents half the ledger, the usable facility may be much smaller than half the invoice value suggests.

  • Customer credit quality and approved credit limits.
  • Concentration in the largest customers or connected companies.
  • Invoice age, dispute status and proof of delivery or acceptance.
  • Contract terms that prohibit assignment or allow wide set-off.
  • Credit notes, rebates, returns and historic dilution.
  • Domestic versus export debt and the governing law.
Business owner reviewing accounts with a laptop, calculator and notebook
Review cash flow alongside the cost of borrowing.

Section 05

Calculate the total fee stack

A service fee may be linked to turnover or invoice value. A discount charge then applies to cash in use, rather like interest. Other charges can cover audits, bad-debt protection, minimum volume, same-day transfers, concentration, setup and early termination.

Model fees against forecast sales and actual payment days. Faster-paying customers reduce the funding period; slower customers raise the discount cost. Also model a month of lower sales, because availability can contract just as fixed costs remain due.

Section 06

Is it the right fit?

Invoice finance fits B2B companies that sell completed goods or services on credit to creditworthy customers and have reliable invoice administration. It can support rapid growth because funding capacity can rise with eligible sales.

It is a weak fit for cash or consumer businesses, heavily disputed billing, very long milestones or a ledger dominated by one vulnerable buyer. Before signing, ask customers how they will experience notices, account changes and collection contact.

Sources

Primary sources and further reading

Facts and status were checked against the following sources on 13 September 2026. External pages can change. Worked examples use the assumptions stated alongside them.

  1. 1.British Business Bank — invoice finance
  2. 2.UK Finance — Invoice Finance and ABL Standards Framework

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