Venture debt is a financing tool that most early-stage founders know exists but relatively few have used deliberately. It sits between equity rounds as a way to extend runway, fund specific initiatives, or bridge to a milestone that justifies a higher valuation at the next equity raise. Used well, it's one of the most capital-efficient tools available to a growth-stage startup. Used carelessly, it adds debt service pressure to a business that may not be generating enough cash to support it.

The decision about whether and when to use venture debt is fundamentally a financial modelling exercise — one that requires a clear view of your cash position, your growth trajectory, and your ability to service the debt under realistic assumptions.

What venture debt is

Venture debt is typically structured as a term loan or revolving credit facility provided by specialist lenders — Silicon Valley Bank, Lighter Capital, Triplepoint, and various regional equivalents — to venture-backed companies. Unlike traditional bank debt, venture debt lenders are comfortable with companies that aren't yet profitable and that have limited tangible assets to secure the loan. They're underwriting based on the quality of the equity investors, the growth trajectory, and the expectation that the company will raise its next equity round before the debt needs to be repaid.

Venture debt is usually priced at 10–14% annual interest, plus warrants — a small equity stake typically representing 1–3% of the loan amount — which allow the lender to participate in the company's upside. The total cost is higher than traditional bank debt but significantly lower than equity at typical early-stage valuations.

When venture debt makes sense

Venture debt makes the most sense when you have a clear use of proceeds that will generate returns — in the form of milestone achievement, revenue growth, or valuation uplift — that exceed the cost of the debt. Classic scenarios include: bridging to a revenue milestone that will enable a higher Series A valuation, funding a specific growth initiative that has predictable returns, or extending runway to avoid a dilutive down round in a temporarily unfavourable fundraising market.

The key condition in all of these scenarios is that the business has enough revenue growth or cash flow visibility to service the debt — interest payments typically start immediately, and principal repayment usually begins 12–18 months after drawdown. A business with lumpy or unpredictable revenue, or that is burning cash without clear line of sight to revenue growth, is a poor candidate for venture debt regardless of the strategic rationale.

When it doesn't make sense

Venture debt doesn't make sense as a substitute for equity when the business needs capital to fund operations that aren't yet generating revenue — the debt service cost adds to an already negative cash flow situation without a clear mechanism for repayment. It also doesn't make sense when the lender's covenants — minimum revenue requirements, cash balance requirements, restrictions on additional financing — are so restrictive that they constrain strategic flexibility in ways that offset the runway benefit.

The founders who get the most out of venture debt are the ones who use it as a tactical instrument with a specific plan — not as a way to defer a fundraising decision or to paper over a business that isn't generating enough growth to justify its burn. Like all financial instruments, its value is entirely dependent on how deliberately it's used.