Top 10 £400,000 Invoice Finance Loan Lenders for UK Businesses 2026

Invoice finance lets you borrow against unpaid customer invoices rather than waiting 30, 60 or 90 days for payment. You submit your outstanding invoices to a lender, who advances a significant percentage of their value — often within 24 hours. A £400k facility means you can draw up to that total amount at any one time against your sales ledger. When your customers eventually pay, the lender collects the funds and releases the remaining balance to you, minus their agreed fee. This type of facility is sometimes called invoice discounting or factoring, depending on whether the lender manages your credit control or you retain it yourself.

Invoice finance at the £400k level is designed for established UK-registered limited companies or LLPs that sell goods or services to other businesses on credit terms. Lenders will assess your annual turnover, the quality and spread of your customer base, your invoice volumes and values, and how long you have been trading. Most providers expect at least six to twelve months of trading history and a minimum annual turnover, often in the region of £100,000 or more. Your invoices must be genuine, undisputed, and payable within a reasonable timeframe. Businesses with a diversified debtor book and low concentration risk tend to access the most competitive terms.

Invoice finance costs generally break down into two parts: a service fee, which is a percentage of your turnover that covers administration and credit management, and a discount charge, which is interest applied to the funds you actually draw. At £400k, pricing is typically more favourable than for smaller facilities because the higher volume reduces the lender's per-unit cost. Your specific rate will depend on factors such as your industry sector, the creditworthiness of your customers, and how concentrated your debtor book is. Rather than fixating on the headline rate, it is sensible to compare the total cost of borrowing across different providers, including any setup fees, minimum service charges, or early exit penalties that may apply.

Invoice finance grows in line with your sales — the more you invoice, the more funding becomes available. This makes it particularly useful for businesses with seasonal cash flow or rapid growth. A secured business loan, by contrast, provides a fixed lump sum with a set repayment schedule, which works well for a specific one-off investment but offers less day-to-day flexibility. A revolving credit facility sits somewhere in between: it gives you a pre-approved limit you can draw and repay as needed, much like an overdraft, though it is typically secured against business assets rather than your debtor book. Invoice finance is often quicker to arrange than a secured loan and may not require property or asset security, making it accessible to businesses that lease their premises or have limited physical assets.

Look beyond price. Consider whether the lender has experience in your industry — sector specialists often understand your payment cycles and can structure the facility accordingly. Check what type of facility they offer: whole turnover agreements cover your entire sales ledger, while selective or spot invoice finance lets you choose which invoices to fund. Decide whether you need a disclosed arrangement, where your customers know the lender is involved, or a confidential facility where the arrangement remains private. Also scrutinise the contract for minimum terms, notice periods, personal guarantee requirements, and whether you will have a dedicated relationship manager. A provider that offers flexibility and transparency is often worth paying slightly more for than the cheapest headline rate.

Setting up a £400k invoice finance facility typically takes between two and six weeks from application to first drawdown. The timeline depends on how complex your business structure is, how quickly you provide the necessary documents, and the lender's due diligence process. This process usually includes a review of your financial accounts, credit checks on your major debtors, verification of your invoices, and the preparation of legal agreements. Some specialist lenders can fast-track applications for well-established businesses with clean, diversified debtor books. Once the facility is live, you can generally access funds within 24 hours of submitting your invoices, which is one of the key advantages over traditional loan products.