TL;DR: To use invoice factoring, a business must have a legal “Notice of Assignment” and a valid B2B contract that does not prohibit debt transfer. The main risk involves the potential for personal guarantees or the “recourse” of unpaid debts back to your business.

Invoice factoring is a common financial tool used by UK businesses to bridge the gap between issuing an invoice and receiving payment. By selling your accounts receivable to a third party (the factor), you can access a significant portion of the invoice value immediately. However, entering such an agreement involves several legal considerations and formal requirements to ensure the transfer of debt is valid and enforceable under UK law. Understanding these requirements helps business owners navigate the process smoothly while protecting their legal interests.

What are the legal requirements for using invoice factoring in the UK?

The legal framework for invoice factoring in the UK is primarily built on contract law and the assignment of debt. Because you are essentially selling an asset—the right to collect a payment—there are specific steps that both the business (the client) and the finance provider (the factor) must follow. From the initial credit search to the signing of the purchase agreement, each step carries legal weight.

The Legal Basis: Assignment of Debt

At the heart of any factoring arrangement is the legal concept of “assignment.” Under the Law of Property Act 1925, debts are considered a “chose in action,” which means they are a legal right that can be transferred from one person or entity to another. For an assignment to be legally binding and “absolute,” it must meet three specific criteria:

• It must be in writing: The agreement to transfer the debt cannot be verbal; it must be a physical or digital document signed by the assignor (your business).
• The assignment must be absolute: You must transfer the whole debt to the factor, not just a portion of it, without leaving the factor to “charge” the debt back through complex conditions.
• Express notice must be given: The person who owes the money (your customer) must be informed in writing that the debt has been assigned.

If these conditions are not met, the assignment may only be “equitable” rather than “legal,” which can make it more difficult for the factoring company to sue for the debt in their own name if a customer refuses to pay.

Notice of Assignment

A “Notice of Assignment” is a formal document sent to your customers. It informs them that you have entered into a factoring agreement and that all future payments for specific invoices must be made to the factoring company’s bank account. Legally, once a customer has received this notice, they can only discharge their debt by paying the factor. If they ignore the notice and pay you instead, the factor may still have a legal claim against them for the money, and you would be legally required to pass that payment on to the factor immediately.

Contractual Eligibility and “Ban on Assignment”

Before you can legally factor an invoice, you must ensure that your contract with your customer allows it. Some large corporations or public sector bodies include a “Ban on Assignment” clause in their standard terms and conditions. This clause explicitly prevents a supplier from selling their invoices to a third party.

While the UK government has introduced regulations to nullify these bans for many small and medium-sized enterprises (SMEs) to improve cash flow, some exceptions still exist. It is vital to review your customer contracts to ensure that selling your invoices does not put you in breach of contract. Generally, factoring is most successful when the debt is “clean,” meaning there are no disputes over the quality of goods or services provided.

Know Your Customer (KYC) and Anti-Money Laundering (AML)

Factoring companies are financial institutions and are therefore subject to strict UK Anti-Money Laundering regulations. Before they can offer you a facility, they must perform “Know Your Customer” checks. This is a legal requirement to prevent financial crime and fraud. You will typically be required to provide:

• Proof of identity for all directors and significant shareholders.
• Proof of address for the business and its principals.
• Company registration details and VAT registration (if applicable).
• Evidence of your business’s financial health, such as recent bank statements or accounts.

As part of this onboarding process, the factor will also conduct credit searches on your business and its directors to assess the level of risk. Get your free credit search here. It’s free for 30 days and costs £14.99 per month thereafter if you don’t cancel it. You can cancel at anytime. (Ad)

The Factoring Agreement: Key Legal Terms

When you sign a factoring agreement, you are entering a long-term legal partnership. These documents can be dense, but several clauses are particularly important regarding legal requirements and obligations:

Recourse vs. Non-Recourse

In a “recourse” factoring agreement, your business remains legally liable if the customer fails to pay the invoice. If the debt remains unpaid after a certain period (usually 60 to 90 days), the factor has the legal right to “charge back” the invoice to you, meaning you must return the cash they advanced. In “non-recourse” factoring, the factor assumes the credit risk. If the customer becomes insolvent, the factor takes the loss, though this usually comes with higher fees and stricter insurance requirements.

Warranties and Indemnities

You will typically be asked to provide warranties that the invoices you are selling are valid, undisputed, and represent a genuine sale of goods or services. If you factor an invoice that turns out to be fraudulent or pre-issued (pro-forma), you could face legal action for breach of contract or fraud.

Personal Guarantees

Many UK factoring providers require directors of smaller companies to sign a personal guarantee. This is a legal commitment that if the business fails to meet its obligations under the factoring agreement—such as failing to pay back recourse invoices—the director becomes personally liable for the debt. This may put your personal assets, including your home, at risk if the business cannot fulfill its contract.

Transparency and the Prompt Payment Code

While the factoring industry is not as strictly regulated by the Financial Conduct Authority (FCA) as consumer lending, many providers follow industry standards set by bodies like UK Finance. Legally, the relationship is a commercial contract between two businesses. However, the UK government encourages fair play through initiatives like the Prompt Payment Code, which focuses on the ethical treatment of suppliers. You can find more about the UK government’s prompt payment policy on their official website to understand how payment terms are managed at a national level.

Data Protection and GDPR

When you use invoice factoring, you are sharing the personal data of your customers (specifically those who are sole traders or partnerships) with the factoring company. Under the UK General Data Protection Regulation (UK GDPR), you must have a legal basis for sharing this data. Typically, this is covered under “legitimate interest” for the purpose of financial management, but you should ensure your privacy policy clearly states that customer data may be shared with third-party finance providers.

Conclusion: Managing the Risks

The legal requirements for using invoice factoring are designed to create a clear, enforceable path for the transfer of money. While the benefits of immediate cash flow are significant, the legal obligations are substantial. You must ensure your invoices are accurate, your contracts allow for assignment, and you understand your liability in the event of customer non-payment. Your business assets, and potentially your personal assets through guarantees, may be at risk if the terms of the factoring agreement are not met. Always seek independent legal or financial advice if you are unsure about the terms of a factoring contract.

People also asked

Does my customer need to agree to invoice factoring?

In most cases, your customer does not need to “consent” to the arrangement, but they must be notified via a Notice of Assignment so they know where to send payment. However, you must check that your contract with them does not contain a “Ban on Assignment” clause.

What is the difference between invoice factoring and invoice discounting?

The main legal difference is confidentiality. In factoring, the factor manages your sales ledger and notifies your customers (disclosed), whereas in invoice discounting, the arrangement is usually kept secret from your customers (confidential).

Can I factor invoices for work that isn’t finished yet?

Generally, no. Legally, an invoice must represent a completed obligation or a “debt really due.” Factoring “pro-forma” invoices or “stage payments” is more complex and often requires a specific type of construction finance agreement.

What happens if a customer refuses to pay the factoring company?

If the customer has a valid dispute regarding your goods or services, the factor will usually “recourse” the invoice back to you. If there is no dispute but they simply won’t pay, the factor’s credit control team will take legal steps to recover the money based on the Notice of Assignment.

Is invoice factoring legally available for new businesses?

Yes, new businesses can use factoring, but they must still meet the legal requirements of having a B2B relationship, valid written contracts, and passing the necessary AML and KYC identity checks.