Top 10 Lenders to Secure a £450,000 Invoice Finance Facility in 2026

Invoice finance allows your business to borrow against the value of unpaid customer invoices. Rather than waiting 30, 60, or 90 days for clients to pay, a lender advances you a significant percentage of the invoice value — often up to 90% — within as little as 24 hours. When your customer eventually settles the invoice, you receive the remaining balance minus the lender's fee. A £450,000 facility means the total funding available to you across your invoice ledger at any one time is up to that amount, giving you a flexible line of working capital that grows with your sales.

For a facility of this size, lenders typically look for businesses trading for at least six to twelve months, with a minimum monthly turnover that comfortably supports the £450,000 limit — this often means monthly sales in the range of £150,000 to £200,000 or higher. You will need to be invoicing other businesses (B2B) on standard credit terms, and your customers should have a solid credit history. Lenders will also assess the quality and concentration of your debtor book — having a spread of reliable, creditworthy customers is far more attractive than being overly reliant on one or two large accounts.

Invoice finance costs are typically broken into two parts: a service fee, which is a percentage of each invoice's value, and a borrowing charge, similar to interest on a loan, calculated on the funds you actually draw down. Rates vary considerably depending on your business's trading history, the size and quality of your debtor book, and whether you opt for invoice factoring or invoice discounting. Because fees and rates depend on individual circumstances, it is important to request tailored quotes from several providers rather than relying on advertised headline figures alone.

Invoice finance is tied directly to your sales ledger, so the amount you can access grows as you issue more invoices, whereas a revolving credit facility or unsecured business loan provides a fixed limit that does not automatically scale with turnover. Invoice finance also relies primarily on your customers' creditworthiness rather than your own business's credit score or assets, which can make it easier to access for growing B2B companies. However, unsecured loans and revolving credit facilities do not involve a lender interacting with your customers, so they offer greater privacy. The right choice depends on whether you prioritise a funding line that expands with your sales or a fixed, standalone facility.

Beyond headline rates, consider whether the provider offers whole-of-book funding or selective invoice finance, as this affects how flexibly you can use the facility. Check the notice period and any minimum contract term — some providers lock you in for 12 months, while others offer more flexible rolling contracts. Look at the advance rate offered, the speed of funding, and whether the lender provides a dedicated relationship manager. Also confirm whether the facility is disclosed to your customers (factoring) or confidential (invoice discounting), and read reviews to gauge how the provider handles collections and customer communications.

Once your facility is set up — which can take anywhere from a few days to a few weeks depending on the provider and complexity of your debtor book — most lenders will advance funds within 24 to 48 hours of you uploading an invoice. Some fintech-focused providers now offer same-day funding for approved invoices. The initial application and underwriting process for a £450,000 facility will typically involve a more detailed review of your debtors and trading history, so it is wise to allow two to four weeks from application to first drawdown. Once the facility is live, ongoing access to cash is generally very quick.