Can I Finance Just One Invoice?

Yes - this is called selective or spot factoring. You choose which individual invoices to finance without committing to a whole-turnover facility. It costs more per invoice (1-5% vs 0.5-3% for whole-turnover) but has no long-term contract or minimum commitment. Minimum invoice sizes are typically £1,000-£5,000.

Why This Matters

Most UK invoice finance facilities require you to assign all (or most) of your sales ledger, locking you into 12-month contracts with monthly minimums. But if you have one large invoice from a creditworthy customer creating a cash gap, or you only occasionally need short-term funding, selective invoice finance (also called spot factoring or single invoice discounting) lets you cherry-pick individual invoices without surrendering control of your debtor book. This matters because it preserves financing flexibility: you're not tied to a provider when your cash position improves, and you don't pay fees on invoices you don't need to finance. However, the transaction-by-transaction model means higher unit costs and stricter credit checks on each debtor. For businesses with irregular cash needs, seasonal peaks, or those testing invoice finance before committing to a full facility, selective finance offers genuine optionality, albeit at a premium.

Key Points

Selective invoice finance lets you submit individual invoices for funding without assigning your entire ledger or signing long-term contracts.
Costs range from 1-5% per invoice (versus 0.5-3% for whole-turnover facilities), reflecting the higher administrative burden and lack of ongoing relationship.
Minimum invoice values are typically £1,000-£5,000, with some providers requiring £10,000+ for single transactions.
Advance rates mirror traditional facilities at 70-90% of invoice value, released within 24-48 hours once the debtor is credit-approved.
The debtor (your customer) undergoes credit assessment for each invoice, so approval isn't automatic even if you've financed invoices before.
No monthly minimums or volume commitments, but most providers cap the number of invoices you can submit per quarter (often 3-6 annually).
Selective facilities suit project-based businesses, startups testing invoice finance, or established firms facing one-off cash gaps rather than structural working capital shortfalls.

Real-World Example

A Birmingham-based design consultancy invoices a FTSE 100 retailer £45,000 for a six-month branding project, payable in 60 days. The consultancy needs to pay two freelancers £18,000 within two weeks but has no cash reserves.

They submit the single invoice to Sonovate's selective facility. After approving the retailer's credit, Sonovate advances £36,000 (80%) within 48 hours, charging a flat 2.5% fee (£1,125). The consultancy pays freelancers on time, and when the retailer settles in 58 days, Sonovate releases the remaining £7,875 (£9,000 reserve minus £1,125 fee). Total cost: £1,125 for 58 days' access to £36,000, no ongoing commitment.

Common Pitfalls

Assuming you can repeatedly finance invoices from the same debtor at spot rates. Many providers limit selective finance to 3-6 invoices per year, after which they require you to switch to a whole-turnover facility.
Underestimating turnaround time. Each invoice requires fresh credit assessment of the debtor, which can take 3-5 working days, making selective finance unsuitable for genuine emergencies unless the debtor is pre-approved.
Ignoring debtor notification. Some selective providers operate on a disclosed basis, meaning your customer receives notification that their invoice has been financed, which can raise questions about your financial stability.
Treating selective finance as a substitute for structural working capital. If you consistently need funding every month, a whole-turnover facility costs half as much per invoice despite the contractual commitment.

What to Do Next

Identify the specific invoice(s) creating your cash gap. Note the debtor name, invoice value, payment terms, and when you need funds, then check if the debtor is a limited company (sole traders and partnerships are often excluded).
Approach providers offering genuine selective facilities such as Triver, eCapital, or Sonovate. Request a quote showing advance rate, flat fee percentage, and turnaround time from submission to funds in your account.
Compare the all-in cost against a short-term business loan or overdraft. If you need £30,000 for 45 days and pay 2.8% (£840), that's equivalent to 23% APR, so ensure the premium reflects the flexibility you're gaining rather than lack of alternatives.