The British Business Bank's view is that a traditional whole-ledger invoice finance facility is generally unsuitable for businesses turning over less than roughly £300,000 a year. That is not because small businesses lack cash flow problems; it is because the fixed costs of a conventional facility do not shrink with the business. The market has changed, though, and there are now products built for exactly that gap.
Minimum turnover: what providers really require
Every provider sets a floor, but the floors vary widely by product:
- Whole-ledger factoring: many providers from around £100,000–£250,000 annual turnover; a few from £50,000.
- Invoice discounting: traditionally £500,000 or more, because the provider relies on your credit control systems and wants a business large enough to run them properly.
- Selective invoice finance and spot factoring: often no fixed turnover minimum, because each invoice is priced on its own merits. Providers may set a minimum invoice size instead, commonly in the low thousands of pounds.
Turnover minimums are rarely the real barrier. A business invoicing £120,000 a year will find providers who will quote. The question is whether the facility makes financial sense once minimum fees are included.
Selective and spot options for businesses under £250,000
Two product types fill the gap the British Business Bank describes. Selective invoice finance is an ongoing arrangement where you choose which invoices, or which customers, to fund: no whole-ledger commitment, normally no minimum monthly fee, and you can go months without using it. Spot factoring goes further: a one-off transaction against a single invoice, with no continuing relationship.
Both cost more per invoice than a whole-ledger facility, typically a service fee of 1.5%–3% or more of each invoice plus a discount charge for the days outstanding. The trade-off is that you pay only when you use them, so a seasonal business or one with a single large contract often pays far less in total.
Selective vs whole-ledger: a whole-ledger facility funds every eligible invoice you raise and usually carries a minimum fee and a 12-month term; a selective facility funds only the invoices you choose, usually with no minimum and no long commitment.
Sole trader or limited company: why it changes the answer
Trading structure matters more in invoice finance than in most other forms of business funding. Invoice finance and factoring provided to limited companies and LLPs are not regulated by the Financial Conduct Authority. Sole traders and partnerships of two or three partners, however, are "individuals" under the Consumer Credit Act 1974. A facility to them that is structured as credit of £25,000 or less can be a regulated credit agreement, and introducing them to lenders can amount to credit broking, which is itself a regulated activity.
Many providers avoid this complexity by funding only limited companies and LLPs, or by structuring sole trader facilities to fall outside the Act. A sole trader therefore has a narrower choice of providers and may face more paperwork. Incorporating purely to obtain finance is a decision for you and your accountant, but if you are already considering a limited company, access to invoice finance is one more point in its favour. See is invoice finance regulated? for the detail.
The cost at small scale: why minimum fees matter most
Factoring charges are percentages, which sounds as though they scale down with the business. The minimum fee breaks that assumption. A facility priced at 2% of turnover with a £750 monthly minimum is, in effect, charging £9,000 a year to any business invoicing less than £450,000. For a £200,000 business that is a 4.5% service fee before the discount charge.
Arrangement, audit and administration fees have the same effect: they are broadly fixed, so they weigh heaviest on the smallest facilities. When comparing quotes, divide the total annual cost by your realistic turnover, not the projection the provider used. Our invoice factoring costs guide sets out the method.
Customer quality matters more than business size
Providers lend against your invoices, so what they care about is who owes you money and whether they will pay. A two-person engineering firm with three blue-chip customers is a better factoring prospect than a 20-person firm selling to a hundred small traders. Providers look for:
- Business customers, not consumers
Invoices to the public are not fundable. Sales to limited companies and public bodies are.
- Creditworthy debtors
The provider credit-checks your customers and sets a limit for each. Poor-credit customers may be excluded or funded at a lower rate.
- Clean, completed invoices
Work finished, no disputes, no retentions or stage applications, and evidence such as a signed delivery note or timesheet.
- Some spread of customers
Concentration limits of around 25%–30% per customer are common on whole-ledger facilities. Selective and spot products assess each invoice alone.
Alternatives a small business should consider first
Factoring is not the only answer to slow payment, and for some small businesses it is not the cheapest.
| Option | Where it works better | Where it falls short |
|---|---|---|
| Business overdraft | Small, short gaps; usually the cheapest money if your bank will provide it. | Limits are fixed and modest, often need security, and can be withdrawn on demand. |
| Business loan | A one-off need such as equipment or a fit-out, repaid over a fixed term. | Fixed repayments regardless of whether customers have paid; does not grow with sales. |
| Better credit control | Businesses that invoice late, chase inconsistently or give longer terms than they need to. Free. | Cannot change a large customer's 60-day terms, and takes time you may not have. |
| Selective invoice finance | Occasional or seasonal gaps, a single large contract, turnover under £250k. | Higher cost per invoice; not suited to funding the whole ledger continuously. |
| Whole-ledger factoring | Continuous B2B credit sales from roughly £250k upwards, where credit control is a burden. | Minimum fees, 12-month terms and notice periods weigh heavily on small or shrinking turnover. |
The invoice finance vs business loans comparison puts numbers on the first two options, and our cash flow guide covers the credit control changes that cost nothing.
Worked example: a £300,000-turnover business
A small design-and-build joinery company turns over £300,000 a year, sells to contractors and developers on 45-day terms, and has one customer who accounts for 35% of sales. It has around £37,000 outstanding at any time and regularly struggles to cover month-end wages. Two routes are quoted.
Illustrative example Whole-ledger factoring vs selective finance, £300k turnover
- Average sales ledger (£300,000 × 45 ÷ 365)
- £36,986
- Route A: whole-ledger factoring
- Funds available (85% advance, concentration limit applied)
- About £29,000
- Service fee (2.5%, but £9,000 annual minimum applies)
- £9,000
- Discount charge (7% a year on about £29,000 drawn)
- £2,030
- Arrangement fee
- £1,000
- Route A total, year one
- £12,030 (4.0% of turnover)
- Route B: selective finance on the largest customer's invoices only
- Invoices funded (£105,000 a year)
- £105,000
- Service fee (3% per invoice)
- £3,150
- Discount charge (7% a year on about £11,000 average drawn)
- £770
- Funds available at any time
- About £11,000
- Route B total, year one
- £3,920 (1.3% of turnover)
Figures are illustrative estimates only and do not represent a finance offer.
Route A releases nearly three times as much cash, but costs three times as much and locks the business in for a year with a minimum fee that assumes turnover holds up. Route B solves the month-end wages problem for under £4,000 and can be switched off when no longer needed. For this company Route B is the sensible start; a whole-ledger facility can be revisited if turnover passes £500,000 and credit control becomes a burden.
Decision checklist
If you can tick most of the following, invoice factoring in some form is worth enquiring about. If not, look at the alternatives first.
- You sell to other businesses on credit terms of 30 days or more
- Your gross margin is comfortably above the total cost of the facility (as a rule of thumb, 15% or more)
- Your customers are established companies who pay, if slowly
- Your invoices are for completed work with no retentions or staged applications
- You trade as a limited company or LLP, or you have found a provider that funds sole traders
- You have calculated the cost including minimum fees against realistic turnover
- You have compared a selective facility with a whole-ledger one
- You have a plan for how you would manage without the facility if you ever left it
Running a smaller business and not sure which route fits?
Tell us your turnover, structure and customers and we will explain which products are realistic at your scale.
Frequently asked questions
What is the minimum turnover for invoice factoring in the UK?
Many providers look for annual turnover from around £100,000 to £250,000 for a whole-ledger factoring facility, and some will consider businesses from £50,000. Traditional invoice discounting often starts at £500,000 or more. Below those levels, selective invoice finance and spot factoring have no fixed turnover minimum because they price each invoice individually.
Can a sole trader use invoice factoring?
Sometimes, but fewer providers fund sole traders and small partnerships. They count as individuals under the Consumer Credit Act 1974, so a facility structured as credit of £25,000 or less can be a regulated agreement. Many providers therefore fund only limited companies and LLPs, or structure facilities for sole traders differently. Trading through a limited company widens the choice considerably.
Is invoice factoring worth it for a small business?
It can be, provided the business sells to other businesses on credit terms, has a reasonable gross margin and has customers who are creditworthy. The decision usually turns on the minimum fee: if a whole-ledger facility's minimum would push the effective cost above 4% or 5% of turnover, a selective facility or a better credit control routine is often the better answer.
Do small businesses need a good credit score for factoring?
The business's own credit history matters less than for a loan, because providers lend against the invoices and assess the customers who owe them. A weak credit score, a CCJ or a short trading history will not necessarily rule a business out, although providers will look at how the business is run and may ask for a personal guarantee.