If your business takes card payments, at some point you'll get the call. It's usually pitched as fast, flexible funding: a lump sum against your future card sales, no fixed monthly repayment, no lengthy application, money in your account within days rather than the weeks a bank loan can take. For a business with a genuine short-term cash need and a poor credit history, or one that's been turned down by a bank, it can sound like the answer nobody else was offering. It's worth understanding exactly what you're agreeing to before you take it, because the pitch and the product are two different things.
How it actually works
A merchant cash advance isn't a loan in the traditional sense — there's no interest rate, no fixed term, and technically no fixed repayment schedule. Instead, the provider advances you a lump sum, and takes a fixed percentage of every card transaction you process from then on, automatically, until the advance (plus their fee) is repaid. On a slow week you pay back less; on a busy week you pay back more. That flexibility is genuinely the product's biggest selling point, and for a highly seasonal business it can be a real, practical advantage over a fixed monthly loan repayment that doesn't care whether trade is good or bad that month.
Where the real cost hides
The catch is in how the total cost is expressed. Rather than an interest rate, providers quote a 'factor rate' — borrow £10,000 at a factor rate of 1.3, for example, and you repay £13,000, however long it takes. Expressed that way it can sound almost reasonable. Converted into an equivalent annual percentage rate, the way a loan or credit card cost is normally compared, merchant cash advances frequently come out significantly more expensive than a bank loan, an overdraft, or standard invoice finance — often dramatically so if the advance is repaid quickly, because the fixed fee doesn't shrink just because you paid it back fast.
A factor rate of 1.3 sounds like a fee. Converted to an annual rate, it's often the most expensive money a small business can borrow — and the flexible repayment is precisely what makes that easy to lose sight of.
The trap that catches good months, not bad ones
The mechanism has a less obvious downside too: because repayment is a fixed percentage of every card sale, a genuinely strong trading period doesn't feel like relief — it means more is coming out of the till at exactly the moment cash flow should be easing. Some businesses end up taking a second advance to repay the first once the daily deductions start squeezing working capital, which is precisely the kind of debt spiral that any funding option promising speed and few questions asked should make you cautious about from the outset.
When it can genuinely make sense
None of this makes merchant cash advances always the wrong call. For a business with a short, specific cash need, decent and predictable card turnover, and no realistic access to cheaper funding — perhaps because of a thin trading history or credit blip that rules out a bank loan — the speed and lack of fixed repayment can be worth the premium, particularly if the alternative is missing a genuinely profitable opportunity, like stock for a busy season that will comfortably cover the cost. The mistake isn't using one; it's using one as a first resort rather than a considered last one.
Why the sales pitch works so well
It's worth understanding why these offers land so effectively, because it's rarely about the merits of the product itself. They typically arrive at exactly the moment a business is feeling a cash squeeze, often via an unsolicited call from a provider who already has your card-turnover data through your payment processor, and the pitch is built entirely around speed and simplicity at a moment when speed and simplicity feel like exactly what's needed. That's precisely the state of mind in which a genuinely expensive product looks most attractive, and precisely why it's worth pausing to run the comparison properly rather than saying yes on the call.
Questions worth asking the provider directly
Before signing, ask plainly what the total repayment figure is in cash terms, not just the factor rate, so there's no ambiguity about what you owe overall. Ask whether there's any cost or penalty for repaying early, since a genuine no-penalty early repayment can meaningfully change the equivalent APR if your card sales turn out stronger than expected. And ask what happens in a genuinely bad month, or several in a row — some providers apply a minimum payment regardless of sales, which quietly removes the flexibility the whole product is sold on. A reputable provider will answer all of this clearly and without hesitation; reluctance to give straight answers to straight questions is itself useful information.
What to do before saying yes
Always convert the factor rate into an equivalent APR before comparing it to anything else, so you're judging it on the same terms as a loan or overdraft. Ask what percentage of daily card sales will be taken and model it against a genuinely slow month, not just an average one. And check what happens if you switch card processing providers or trading dips hard — some agreements include minimum repayment terms that remove the flexibility that was the whole point of choosing this route in the first place. Loan, overdraft or invoice finance is worth reading before any of these conversations, because a merchant cash advance is rarely the cheapest option on the table — it's usually the fastest, and knowing the difference is what keeps it a sensible tool rather than an expensive mistake.
Common questions
How do I convert a factor rate into something I can compare to a loan?
Work out the fee as a percentage of the advance, then annualise it over how long repayment actually takes. Borrow £20,000 at a factor rate of 1.4 and you repay £28,000 — an £8,000 fee, or 40% of the advance. If your card turnover clears that in nine months, you have paid 40% over three-quarters of a year, which is already around 53% a year on a simple view. But because you are repaying continuously rather than in one lump at the end, your average outstanding balance is roughly half the advance, and the true annualised cost lands closer to 100%. That is the number to hold against a bank loan or an overdraft — not the 1.4.
Is a merchant cash advance regulated by the FCA?
Usually not. An advance to a limited company is structured as a purchase of future card receivables rather than a loan, which puts it outside the Financial Conduct Authority's regulated perimeter: no affordability assessment, no standard-format cost disclosure, and no Financial Ombudsman Service to complain to if it goes wrong. There is a narrow exception where an advance of £25,000 or less to a sole trader or unincorporated business is used wholly or predominantly for non-business purposes, which almost no business MCA is. General law still applies — misrepresentation, unfair contract terms — but you are relying on the contract you signed rather than on a regulator, which is why reading it properly matters more here than with a bank loan.
What happens if my card takings collapse?
That depends entirely on a clause most people skim past. The product is sold on the promise that repayment flexes with your sales, and under a genuinely turnover-only agreement it does: a bad month simply takes longer, and the total owed doesn't change. But some agreements carry a minimum monthly payment, a longstop date by which the advance must be cleared in full regardless of trading, or a personal guarantee from a director that bites if the company can't repay. Any one of those removes the flexibility that was the whole reason for choosing the product. Ask directly, in writing, what happens across three consecutive bad months, and get the answer before you sign rather than discovering it afterwards.
Can I take a second advance to clear the first?
You can, providers will offer it, and it is worth naming as the trap it is. Refinancing an advance with another advance means paying a second fixed fee on money you have already largely repaid, while the slice taken from every card sale usually goes up rather than down, because two agreements are now drawing from the same till. 'Stacking' advances from different providers at once is worse again. If you find yourself considering it, the honest reading is that the first advance is not being repaid out of profit — it is being repaid out of the next advance. That is the moment to talk to your accountant or a debt adviser, not the moment to sign.
When is one genuinely the right call?
When three things are true at the same time: the need is short and specific, your card turnover is genuinely predictable, and cheaper money is not available to you in the time you have. Buying stock for a season that will reliably sell through, replacing equipment whose failure is costing you trade every day, or bridging to a payment you can evidence is coming — each can justify the premium. What doesn't is covering a persistent gap between what the business earns and what it spends, because the daily deduction widens that gap rather than closing it. Before saying yes, get a decision on an overdraft, a Start Up Loan or invoice finance even if you expect a no. A documented no takes days and makes the comparison real.
Put your own figures in: Merchant cash advance calculator
