Working capital is the gap between what you’re owed and what you owe right now. When that gap bites — invoices unpaid, suppliers chasing — working capital finance is what closes it.
You’ll hear the term used loosely, so it pays to be precise. It covers invoice finance, merchant cash advances, revolving credit facilities and trade finance. What unites them is purpose, not mechanics: each keeps your cash flow moving while you wait to be paid.
You should treat it as a buffer, not a balance sheet. Working capital finance is operational cover: use it for equipment, an expansion or a one-off purchase and it costs more than a term loan, while eroding the facility your trading needs. That distinction is the whole game.
What Working Capital Finance Actually Is
You borrow against the timing of your own cash, not against a long-term plan. Working capital finance bridges the cash conversion cycle: the days between paying your suppliers and staff and being paid by your customers. That’s the gap it closes.
A term loan funds an asset you keep for years. Working capital finance funds the wait. That distinction sets the price, the term and the product that fits, so getting it right matters before you compare a single rate.
The cheapest fix is often not finance at all. If you can invoice faster, take a deposit or agree better supplier terms, you shorten the gap and need less funding. We treat borrowing as the lever you pull after the free ones, not instead of them.
Why Businesses Need Working Capital Finance
You’ll feel the squeeze in your cash flow first, through slow-paying customers. UK payment terms have lengthened without anyone agreeing to it: 30 days drifts to 60, and 60 becomes 75 in practice.
Your working capital gets trapped in the ledger. A business turning over £1m a year on 60-day terms has £164,000 locked inside customer invoices at any moment — money you can’t use for payroll or stock.
Seasonal businesses hit the same wall from a different angle, and you should expect it. You’re stocking in August for a November rush, paying the supplier before the revenue arrives, and the gap has to be filled by something.
Rapid growth is the most counterintuitive trigger, and you need to plan for it. Winning a large contract sounds like good news until you realise you’ll have to hire, stock and produce before the first payment lands.
You can be profitable and still run out of cash, and we see it often, without anything going wrong on paper. Liquidity keeps the lights on month to month. Profit on paper does not.
The Four Main Working Capital Products
You have four mainstream options, and they price very differently. The table below sets them side by side before we walk through each one.
| Product | What it funds | Typical cost basis | Best for |
|---|---|---|---|
| Invoice finance | Unpaid B2B invoices | 0.5–3% of turnover service fee + 6–11% discount charge | B2B firms with creditworthy customers on 30–90 day terms |
| Merchant cash advance | A lump sum against future card takings | Factor rate 1.1–1.5 (no APR) | Card-heavy retail, hospitality and leisure |
| Revolving credit facility | Recurring short-term gaps | 8–20% annualised interest on drawn funds | Stock, payroll and VAT-quarter buffers |
| Trade finance | The gap between paying a supplier and being paid | 0.5–2% of trade value per transaction | Importers and exporters on cross-border terms |
Invoice Finance
You release cash against your unpaid invoices, typically 70–90% upfront, with the balance paid when your customer settles. Two versions exist: factoring (the lender runs credit control) and invoice discounting (confidential).
We find it works best for businesses with a spread of creditworthy B2B customers. It doesn’t suit retailers, project firms where invoices get disputed, or any business leaning on two or three large customers, because concentration risk cuts the advance rate fast.
Cost is a service fee of 0.5–3% of the turnover financed, plus a discount charge on what you actually draw. That charge is the base rate plus a 1.5–6% margin, so at today’s 3.75% base it works out at 6–11% annualised on drawn funds.
You feel the service fee even in a quiet quarter, because it scales with your turnover whether you draw heavily or not. That’s the line that catches people out.
Merchant Cash Advance
A merchant cash advance gives you a lump sum against future card takings, repaid as a share of daily card revenue until the total clears. There is no fixed schedule: quiet weeks repay quietly, busy weeks repay faster.
We find MCAs work best for businesses with consistent card revenue — hospitality, retail, leisure. The flexibility is genuinely useful when your cash flow is seasonal, because you’re not forced to find a fixed payment in February from January’s takings.
You pay through factor rates, not APR. A factor rate of 1.25 on a £20,000 advance means repaying £25,000 in total. Translate that to an annualised cost and most borrowers are surprised: it lands at 25–70%, and climbs past 100% if you clear it fast.
You’re paying for speed and no fixed schedule, so model the annualised cost before you accept. That’s the catch.
Revolving Credit Facilities
You get a pre-agreed credit line you can draw, repay and redraw. You only pay interest on what you use, and the limit resets without a fresh application — like a credit card without the consumer pricing.
We find it works best for recurring short-term gaps: buying stock, covering payroll in a slow month, or bridging a VAT quarter when the bill lands before the receivables do. Treat it as a buffer, not a permanent source of working capital.
Cost is interest on drawn amounts at 8–20% annualised for a specialist facility, plus an arrangement fee and sometimes a commitment fee on the undrawn portion. Bank overdraft EARs run higher still, from 13% to nearly 40%, so compare the all-in figure rather than the headline.
Trade Finance
Trade finance covers the gap between paying a supplier and getting paid by your customer. In practice that means letters of credit, supply chain finance or stock finance, mostly in import and export.
It suits importers, manufacturers and distributors working with overseas suppliers on 30–90 day terms, where the meaningful risk sits with a counterparty rather than with your own debtors.
Cost: letters of credit typically carry arrangement fees of 0.5–2% of the trade value. Supply chain finance tracks base rate plus a margin and is often cheaper than invoice finance, because the credit risk sits with the buyer — usually a large corporate — not you.
Where Working Capital Finance Gets Oversold
You’ll be sold hard on speed and flexibility. Both are real and both matter, but the cost of that flexibility is significant, routinely underplayed, and it quietly drains your cash flow.
You should watch MCAs most closely, because they’re the worst offender. A factor rate of 1.3 on a £20,000 advance means repaying £26,000. Roll that three times across 18 months and you’ve paid £18,000 to keep £20,000 in play.
By contrast, a term loan on the same £20,000 at 20% APR costs you well under £4,000 in interest over 18 months — the difference is most of the year’s profit on the work being financed. That’s the trap.
You’ll find a quieter version in invoice finance. The facility can turn evergreen — you draw against this month’s invoices to repay last month’s advance, and the service fee runs whether you need the cash or not, so the cost compounds while the benefit fades.
Model the annualised cost before you sign
A factor rate hides the annualised cost. Always convert it: a 1.3 factor rate repaid over six months is far more expensive in APR terms than the same rate repaid over twelve. Ask the lender for the total amount repayable and the expected repayment period, then compare that against a term loan on the same sum before you commit.
How to Choose the Right Working Capital Product
You should start with the shape of your cash flow gap, not the product. If the shortfall is a one-off — a single large order, a delayed payment — a short facility you can clear quickly is cheaper than a rolling commitment.
Next, match the product to how you actually get paid. B2B firms invoicing on terms lean to invoice finance; card-takings businesses suit an MCA; a recurring stock or payroll gap fits a revolving facility you draw and repay.
You should price every option on the same basis. Convert a factor rate to an annualised cost, add the fees, and compare the total repayable. We have seen the cheapest-looking option turn out dearest once the fees land. Cheapest on the headline isn’t cheapest in total.
You should also check what the lender can take if it goes wrong. Most working capital finance for limited companies needs a personal guarantee, which puts your own assets behind the facility, so know that before you sign, not after.
Common Traps to Avoid
Avoid funding long-term losses with short-term money. A revolving facility used to cover a structural shortfall hides the problem for a quarter and makes it worse, because the debt compounds while the trading gap stays open.
Your concentration limits matter on invoice finance. If one customer makes up most of your turnover, the lender caps the advance against them, choking your cash flow and delivering far less than the headline rate implied.
Most of these products are unregulated, so you carry the risk. A B2B merchant cash advance is a purchase of future receivables, so you have no Financial Ombudsman route and no FSCS cover if the deal turns sour. It isn’t a regulated loan.
Read the personal guarantee before you sign anything. We rate it the single clause that turns a business facility into a personal liability, and lenders rarely lead with it.
Try the free levers first
Before you take on any facility, shorten the cash conversion cycle itself. Invoice the day the work is done, ask for a deposit on large orders, chase overdue accounts weekly, and negotiate longer supplier terms. Every day you shave off the cycle is a day of finance you don’t have to pay for.
Working Capital Finance FAQs
Is working capital finance the same as a business loan?
No. A business loan funds a long-term asset or plan and is repaid over years. Working capital finance covers the short-term gap in your cash flow while you wait to be paid, and the products — invoice finance, revolving credit, merchant cash advances — are priced and structured for that purpose.
How fast can working capital finance arrive?
Quickly. Merchant cash advances and fintech revolving facilities can fund within 24 to 48 hours once you’re approved. Invoice finance takes a little longer to set up but then releases cash against each invoice within a day. Bank facilities are slower to arrange.
Will I need to give a personal guarantee?
Usually, yes. Most working capital finance for a limited company is backed by a personal guarantee from a director, which means your own assets sit behind the facility. Read the guarantee carefully, because it’s the clause that turns a business debt into a personal one.
Does working capital finance affect my business credit file?
It can. Regulated facilities and some lenders report to business credit agencies, while unregulated products such as merchant cash advances often do not. Missing payments or defaulting can still be recorded and chased, so treat every facility as a real liability.
What is the cheapest form of working capital finance?
For a B2B business with creditworthy customers, invoice finance or a bank revolving facility is usually the cheapest, with a total cost of 1–4% of turnover. Merchant cash advances are the most expensive once you annualise the factor rate, so use them only when card revenue and speed outweigh the premium.
Methodology and Disclosure
How we researched working capital finance
Scope. We compared the four mainstream working capital products on cost basis, eligibility, funding speed and risk, using each provider’s own pricing pages and UK trade-body data rather than aggregator marketing.
Data sources. Cost ranges were checked against provider pricing pages, the British Business Bank, UK Finance, and the Bank of England base rate (3.75% as of June 2026). Factor-rate and APR examples are worked illustrations, not quotes.
Update cadence. We re-verify the figures on this page when the base rate moves or a major provider changes pricing. The verification date reflects the most recent review. Some links on this page are affiliate links; see our editorial policy.
Regulatory note. This page is editorial content, not regulated financial advice. Most B2B working capital products are unregulated commercial finance, so the Financial Ombudsman Service and FSCS protections may not apply. Compare offers directly with providers before you apply.