Equity vs debt, and how founders get capital structure wrong

Equity is the most expensive money you will ever raise. Most founders treat it as the default.

The reason is not that founders have weighed the alternatives and chosen equity. It is that equity is the only option most of them have been shown. The entire early-stage ecosystem is built around it. Accelerators teach it, investors promote it, and almost every piece of startup content assumes it. Debt gets mentioned as something for later, once the business is real.

So the question founders ask is how much can we raise, at what valuation. The question they should be asking is what does this capital need to do, and what is the cheapest form of capital that can do it.

Those are different questions, and they produce different answers.

Start with what equity actually costs. If you sell twenty percent of the business to fund eighteen months of runway, you have not paid an interest rate. You have paid twenty percent of every future outcome, permanently, priced at today's valuation.

If the business is worth ten times more in four years, that twenty percent was extraordinarily expensive money. Founders understand this intellectually and consistently underweight it in the moment because dilution has no monthly payment attached to it. Nothing leaves the bank account. The cost is deferred, which makes it easy to discount.

Debt has the opposite profile. It is visibly expensive and often cheaper in practice. The interest rate is uncomfortable to look at and the repayment schedule constrains cash flow, but the cost is bounded. You pay it back and it is finished. It does not scale with your success.

This does not mean debt is always right. It means the comparison is rarely made properly. The useful discipline is to separate what the capital is actually funding.

Capital that funds a known, repeatable cycle is usually the wrong thing to raise equity for. If you need cash because you pay suppliers before customers pay you, that is a working capital gap. It recurs every cycle and resolves every cycle. Invoice financing or supply chain finance exists precisely for this. Using equity to fill it means diluting permanently to solve a temporary timing problem.

Capital that funds an uncertain outcome is usually the right thing to raise equity for. Building a product that may not work. Entering a market that may not respond. Hiring ahead of revenue that may not arrive. Nobody will lend against that, and they should not. The investor takes the risk and is compensated with upside. That is what equity is for.

Most raises are a mix of both, which is where founders go wrong. They size the round to cover everything, including the parts that are financeable, and dilute for the whole amount. The instruments worth knowing about are not exotic.

Invoice financing advances cash against outstanding receivables. It suits businesses selling to other businesses on long payment terms, where customers are creditworthy but slow.

Supply chain and purchase order financing bridges the gap between committing to inventory and receiving payment. It suits product businesses with predictable manufacturing cycles.

Revenue-based financing takes a percentage of monthly revenue until a fixed multiple is repaid. It suits businesses with genuinely recurring revenue and does not suit businesses with lumpy or project-based income, where a bad quarter can turn a manageable obligation into a serious one.

Venture debt sits alongside an equity round rather than replacing it. It extends runway without further dilution and generally requires you to have already raised institutional equity.

Each has a real cost. The point is not that these forms of capital are free. The point is that the cost is knowable and comparable, and almost no founder does the comparison before defaulting to a round.

There is also a signalling dimension that founders underestimate. A founder who arrives at a Series A conversation with a clean capital structure and a clear explanation of why each instrument was chosen looks like someone who understands their own business.

A founder who has stacked three convertible notes with different caps and cannot explain what happens at conversion looks like the opposite, regardless of how well the business is performing.

Before the next raise, work out what the money is doing. Fund the certain parts with the cheapest capital available and reserve equity for the parts nobody else will take a risk on.