Every growing SME eventually hits the same fork: the opportunity is real — a new site, a big contract, a piece of equipment, a hire that pays for itself — but the cash to fund it isn't sitting in the bank. From there the conversation almost always jumps straight to "should we borrow, or should we raise?" That's a reasonable question to ask. It's just usually asked before the business has actually worked out what it's trying to protect.
Debt and equity aren't a cheaper option and a more expensive one. They're two different ways of pricing risk, and each one only makes sense once the business is honest about how predictable its own cash flow actually is.
What debt actually costs
Debt is repaid on a fixed schedule regardless of how the business performs that particular month. That's the whole trade: a lender takes no upside if the business does brilliantly, and in exchange the business keeps every dollar of that upside for itself — provided it can service the repayments. The real cost of debt isn't the interest rate on the term sheet. It's what happens to the business in the specific month revenue dips and the repayment is still due. A business with steady, predictable cash flow can carry debt comfortably. A business with lumpy or seasonal revenue can find the same facility turns a manageable rough patch into a covenant breach, which is exactly why lender-ready reporting matters more than the loan itself once the facility is in place.
What equity actually costs
Equity doesn't have to be repaid on a schedule, and it doesn't put the business at risk if a quarter goes badly — an investor's return depends on the business doing well over years, not on a repayment clearing on the 28th of the month. That flexibility is genuinely valuable for a business with uneven cash flow, a longer runway to profitability, or a growth plan too large for its balance sheet to carry as debt. The cost is permanent: every share issued is a share of every future dollar the business makes, indefinitely, whether the capital raised turns out to have been the right call or not. Diluting ownership to fund a project that debt could have covered is one of the more expensive mistakes a growing business can make, because unlike a loan, it doesn't get cheaper once it's repaid — it's never repaid at all. It's the same reason the five moves that actually raise what a business is worth matter before a raise, not after: the valuation the equity is priced against is set at the worst possible time to be underselling it.
The question that actually decides it
The useful test isn't "which is cheaper" — on paper, debt almost always looks cheaper, and that comparison alone leads plenty of businesses to over-leverage a plan that couldn't survive a bad quarter. The useful test is: if this specific growth bet takes twice as long to pay off as planned, or the market shifts underneath it, can the business still meet a fixed repayment schedule without real stress? If yes, debt is usually the more disciplined and less expensive choice. If the honest answer is "not comfortably," that's the business telling you the risk belongs with an investor who's prepared to wait for it, not with a lender who isn't. Most SMEs never sit down and ask that question directly — they default to whichever option someone in their network happened to use, and only find out which one actually suited the business a couple of years into living with the answer.