Most businesses arrive at a funding conversation with an instrument already in mind. Often that instinct is sound. Just as often it is anchored to what a peer did, or to whichever option was described most persuasively.
The choice between debt and equity is not really a choice between two products. It is a choice about which kind of risk you would rather carry.
What each instrument actually asks of you
Debt asks for certainty. You commit to a repayment schedule that falls due whether or not the funded activity performs as planned. In exchange, ownership is untouched, the cost is defined in advance, and once repaid the relationship ends.
Equity asks for ownership. There is no repayment obligation and no security to provide, which makes it well suited to funding growth that would strain a repayment schedule. In exchange you give up a share of all future value, and you acquire a shareholder with a view on strategy, governance and eventual exit.
Debt is expensive when things go badly. Equity is expensive when things go well. Which risk you prefer is the actual question.
A practical way to decide
Four questions usually resolve the matter faster than any comparison table.
- How predictable are the cash flows? Predictable, contracted or recurring revenue supports debt comfortably. Volatile or early-stage revenue does not, regardless of how attractive the opportunity is.
- What is the money for? An asset with a defined payback period suits debt, matched in tenor. Funding a period of investment before returns arrive generally suits equity.
- Can you service the worst realistic case? Not the plan — the case where the next two years are materially harder. If not, debt is transferring risk onto the business at exactly the wrong moment.
- What are you unwilling to give up? Control thresholds, board composition, exit expectations. Knowing your limits before negotiating is what prevents drift.
The comparison most businesses get wrong
Comparing an interest rate to a dilution percentage is not a meaningful comparison. A 12% interest cost and a 15% equity stake are not on the same axis: one is a defined annual cost on a declining balance, the other is a permanent share of all future value.
A more useful framing is to model both against the same set of outcomes. In a strong scenario, equity is usually the more expensive instrument by a considerable margin. In a weak scenario, debt is, and it carries consequences that extend to security and guarantees. Neither is universally better.
Where the middle ground sits
The debt-or-equity framing conceals a broad set of instruments between them. Venture debt provides borrowing alongside equity backing. Mezzanine and structured capital sit between senior debt and equity, often with conversion features. Receivable-backed structures raise capital against specific cash flows rather than the balance sheet.
These generally price above bank credit and below the effective cost of equity, and they exist precisely because many requirements do not fit neatly into either category. Our alternative investment funding page covers this ground.
A common and sensible outcome
Many businesses end up with a combination: equity funding the uncertain part of a plan, debt funding the part with predictable returns. That is frequently a better answer than either alone, and it is rarely the answer a business arrives with.
What to settle before you approach anyone
Whichever route you pursue, the same preparation applies: a clear use of funds, financials that reconcile across statutory, tax and management reporting, projections built from assumptions you can defend, and an honest account of the existing obligation position. Those determine how the conversation goes far more than the instrument you have chosen.
Our debt funding and private equity pages set out what each route asks for in more detail.