Venture debt: extend runway without another full equity round

Venture debt is designed for early-stage and high-growth companies that already have venture-capital backing but may not yet have the cash flow or hard assets required for a conventional bank loan. It can extend runway between equity rounds, but the company still takes on fixed repayment obligations and can give the lender warrants or other equity-linked rights.

Venture debt usually supplements venture capital rather than replacing it

The British Business Bank describes venture debt as lending to early-stage, high-growth businesses that are already supported by venture capital. The lender focuses heavily on the company's ability to raise more capital and reach the next value milestone rather than only on historic profit or physical collateral.

A startup that has just closed a £5 million equity round might use a £1 million venture-debt facility to fund extra product development or sales expansion. The debt can reduce immediate dilution, but the business should not borrow more than it can realistically service or refinance.

Use the debt to reach a defined milestone before the next equity raise

The classic use is runway extension. Management should state what the debt buys in months and what milestone those months are expected to achieve, such as regulatory approval, recurring revenue, a product launch or a funding round at a higher valuation.

If £1 million of debt simply covers an unchanged monthly burn with no improvement in the equity story, the next fundraising can become harder because investors see the same business plus a lender that must be repaid.

Compare interest, fees and equity-linked upside

Venture debt can include interest, arrangement fees, drawdown fees and warrants or similar rights. The headline interest rate therefore does not capture the full economic cost. Model the lender's equity participation as well as cash interest.

A facility that looks cheaper than selling another 5 percent of the company can still become expensive if warrants increase substantially in value. Finance should compare total expected cost under different growth outcomes.

Read covenants and draw conditions before assuming the full facility is available

Some facilities are tranched, with later drawdowns available only if the company achieves milestones or raises more equity. Covenants can also restrict cash, additional borrowing, acquisitions or other actions.

Build every condition into the board finance model. A £3 million commitment is not the same as £3 million of immediately available cash if only £1 million can be drawn today.

Debt service can become painful while the company is still loss-making

Unlike equity, venture debt has a repayment schedule. Interest-only periods can delay principal payments, but the liability remains. Model the monthly cash effect against the downside case, not only the investor presentation.

If the company misses its next equity round, the lender can become the most important stakeholder because cash is running out while debt remains due. Management should know the contingency plan before signing.

Keep the venture-debt decision at board level

The board should approve the purpose, facility size, warrants, security, covenants and expected next financing. Keep the legal documents with the treasury schedule and reflect debt service in runway reporting.

Review actual use of proceeds monthly. The facility should move the company toward the milestone that justified borrowing, not disappear into general burn without accountability.

Worked example: a company has £2.4 million of cash and burns £300,000 a month, giving about eight months of runway before considering minimum cash. A £1.2 million venture-debt draw can add roughly four months before debt service. If those four months allow the company to reach a major regulatory approval that raises the next equity valuation, the debt can reduce dilution. If the milestone slips, the company can arrive at the next round with less cash and more obligations.

Board reporting should show gross cash, debt drawn, undrawn commitment, monthly interest, next principal payment and covenant headroom alongside ordinary runway. A single headline such as "12 months of cash" can be misleading if part of that cash is borrowed and repayment begins in month nine.

Review what happens in a sale as well. Venture debt documents can include prepayment fees, end-of-loan payments or warrant rights that affect transaction proceeds. Founders should understand the lender's position in an acquisition, not only in the next financing round.

Run a refinancing sensitivity alongside the operating plan. If the next equity round is delayed by six months, model whether the company can still pay interest and principal without cutting the growth programme that the debt was meant to protect. A venture facility should add strategic time, not create a cliff that forces fundraising on the lender's timetable.