When not to take on business debt: a UK SME framework

Lendrly's whole purpose is to make UK SME finance legible to the owners using it. That has to include the answer when the right call is to walk away from a finance offer entirely. Debt is a powerful tool but it also amplifies whatever is happening underneath. Taking on debt to grow a profitable business accelerates the growth; taking on debt to fund ongoing losses accelerates the losses. This guide is a framework for the second case — when not to borrow, and what to do instead.

Sign 1: You are using debt to plug ongoing losses

The single clearest signal not to borrow is that the business is currently loss-making and the proposed debt is being used to fund the gap rather than to fund a specific investment with a payback. If you cannot articulate "I will spend the £X on Y, which will generate £Z within W months", and instead it's "I need £X to cover the next few months", the underlying business problem is structural and debt will make it worse, not better. The right move is to fix the underlying P&L first — pricing, costs, sales channels, customer mix — and borrow afterwards if needed for growth.

Sign 2: Your cashflow already cannot service current debt

If you are already missing payments on existing facilities, juggling supplier payments to keep the lights on, or running on a maxed-out overdraft, adding more debt almost always accelerates the path to distress. Refinance and restructuring of existing debt may be the right move — but new debt on top of existing strain rarely is. UK lenders should pick this up at underwriting, but borrowers under pressure sometimes push through with smaller or specialist non-prime lenders, which compounds the problem.

Sign 3: The unit economics are negative

For online businesses and subscription models, the most reliable warning sign is negative or borderline unit economics. If your customer acquisition cost exceeds the gross margin generated by each customer, every new customer makes the loss worse, not better. Borrowing to fund more marketing into negative unit economics is one of the most predictable ways to destroy an ecommerce or SaaS business. Fix the unit economics first; then scale with debt.

Sign 4: You cannot evidence the investment will pay back

Borrowing for an investment that should pay back in 18 months — new equipment that lifts capacity, marketing into a proven channel, stock for a confirmed demand spike — is straightforward debt logic. Borrowing for a project where the payback is speculative — "we hope this will work" — usually does not. UK SME owners who borrow into speculation often end up with the debt servicing intact and the speculative project producing nothing. If you cannot model the payback in a one-page spreadsheet, do not borrow against it.

Sign 5: The product structure does not match the need

An MCA at 1.30 factor is the wrong product for funding a 5-year equipment purchase. A 5-year term loan is the wrong product for a 6-week stock cycle. Owners regularly take whatever finance is fastest or most accessible rather than what fits the need, and end up paying materially more than necessary. Matching product term and structure to the use case is one of the most important things this guide can say.

• Short-term working capital need: MCA, invoice finance or revolving credit line.
• Capex with 3 to 7 year payback: asset finance or term loan.
• Property purchase: commercial mortgage or bridging-then-mortgage.
• Growth marketing or stock for an ecommerce business: RBF or platform-native funding.
• One-off acquisition or restructure: structured package, not a single product.

Sign 6: You are taking debt because someone is selling it to you

If your only reason for considering a facility is that a salesperson called and pitched it well, slow down. UK SME finance is often sold actively — by lender BDMs, by brokers, by introducers — and the sales cycle naturally surfaces facilities when they are not needed. The right starting point is the business need, not the available product. "What facility should I take?" is the wrong question. "What investment does the business need to make, and how should it be funded?" is the right one.

Sign 7: The owner cannot sleep at night with the personal guarantee

Most UK SME finance above £25k includes a director PG. If the size of the PG would put the family home at material risk in a downside scenario, and the owner cannot rationalise that risk against the upside of the borrowed funds, the deal is too big. Smaller facility, more equity contribution, slower growth — any of these is usually a better answer than carrying personal anxiety about the downside for 5 years.

Sign 8: The business is at a pivot point

If you are seriously considering a major change — a pivot to a new product, an exit, a restructure, a co-founder departure, a sector exit — taking on significant new debt usually constrains the options. Most new facilities lock the business into the current shape for the term. If the shape is about to change, finishing the strategic decision first and financing afterwards is usually cleaner than financing the current shape and then having to refinance, settle or carry over into the new structure.

What to do instead

1. Diagnose the underlying need: is this growth capital, working-capital cycle smoothing, capex, or covering a structural problem?
2. If the underlying need is structural (ongoing losses, broken unit economics, customer concentration), fix that first.
3. If the underlying need is working capital, optimise the cash cycle first — debtor days, supplier terms, stock turn — before borrowing.
4. If the underlying need is growth, model the expected payback and size the facility to it.
5. Take professional advice for facilities above £100k or structural decisions. Independent legal review on the facility agreement typically costs £750 to £2,500.
6. If you still need debt, take the smallest facility that meets the need, not the largest the lender offers.

A note on equity, retained earnings and supplier credit

Debt is one of three main funding routes for a UK SME — alongside retained earnings and equity. Retained earnings (profit reinvested) is free capital but slow. Equity (founder investment, angel, VC) is expensive but does not carry servicing obligations. Supplier credit and customer deposits are often the cheapest working capital available and are routinely under-used. Stretching supplier credit by 15 days through better terms is often equivalent to taking a £20k facility, with no interest cost. Before any new debt, work the alternatives.

When debt is the right call

To be clear — debt is the right call in many situations. Funding growth in a profitable business with strong unit economics. Funding capex with predictable payback. Smoothing a seasonal working-capital cycle. Funding an acquisition where the target's cashflow can service the debt. Funding a confirmed customer contract that requires materials or stock investment ahead of payment. The point of this guide is not to discourage borrowing — it is to make sure the borrowing is being done for the right reasons.