Venture Debt Explained: A Strategic Funding Option for Manufacturing and Hardtech Startups
Raising capital is one of the most consequential decisions a startup founder will make, and the choice of instrument shapes not just the balance sheet but the long-term trajectory of the business. For founders in manufacturing, hardtech, and other capital-intensive sectors, venture debt has emerged as a compelling alternative to traditional equity rounds. It offers access to meaningful capital without the ownership dilution that comes with issuing new shares, though it introduces its own obligations and risks that deserve careful consideration. Understanding how venture debt works, who it suits, and what the current market looks like is essential for any founder evaluating their funding options.
What Venture Debt Actually Is
Venture debt is a form of debt financing made available to venture-backed companies that do not yet have the asset base or cash flow history required to access conventional bank lending. Unlike a standard commercial loan, venture debt is structured with the understanding that the borrower is a high-growth startup, often pre-profitability, with institutional equity investors already on the cap table.
Because lenders are taking on more risk than a traditional bank would accept, venture debt agreements typically include warrants or options that give the lender the right to purchase equity in the company at a predetermined price. This warrant coverage is how lenders capture some of the upside that compensates for the elevated risk profile of the borrower. The result is a hybrid instrument that sits somewhere between pure debt and equity in terms of its risk and return characteristics.
How Venture Debt Compares to Equity Financing
The most immediate distinction between venture debt and equity financing is dilution. When a startup raises an equity round, it issues new shares, which reduces the ownership percentage of existing shareholders including founders and early investors. Venture debt avoids this outcome in the main, though the warrant component does introduce a small degree of potential dilution if the lender exercises their option.
The trade-off is that debt requires repayment. Unlike equity, which has no fixed repayment schedule and no interest obligation, venture debt comes with a defined term, an interest rate, and a repayment structure that the company must meet regardless of its financial performance. This creates a fixed cash outflow that equity financing does not impose.
From a cost of capital perspective, venture debt can be less expensive than equity when the company is on a strong growth trajectory and the equity it would otherwise issue is highly valuable. If a founder believes their next equity round will be priced significantly higher than the current valuation, preserving that equity by using debt in the interim can be a rational decision. However, if the company encounters difficulties, the repayment obligation remains and can place real strain on cash flow.
Why Manufacturing and Hardtech Startups Are Well Suited to Venture Debt
Manufacturing and hardtech businesses are among the most natural candidates for venture debt, for reasons rooted in the economics of building physical products. These companies typically require substantial upfront investment in equipment, tooling, facilities, and supply chain infrastructure before they can generate meaningful revenue. That capital intensity means equity alone can be an expensive way to fund growth, particularly in the early stages when valuations may not yet reflect the full potential of the business.
Once operational, manufacturing companies often develop more predictable revenue streams than software businesses, because they are selling physical goods under contracts or purchase orders with defined volumes and pricing. That predictability aligns well with the structured repayment schedules that venture debt requires. A lender extending capital to a manufacturer that has signed its first major customer contract has a clearer picture of repayment capacity than one lending to a pre-revenue software company.
Hardtech startups building in areas such as advanced materials, robotics, energy systems, or industrial automation face similar dynamics. The development cycles are long, the capital requirements are significant, and the revenue, once it arrives, tends to be durable. Venture debt can serve as a bridge between equity rounds, allowing these companies to extend their runway, hit key milestones, and raise their next round from a stronger position.
The State of the Venture Debt Market in 2025
The venture debt market has grown substantially in recent years and reached a record level in 2025. According to data published by Runway Growth Capital and PitchBook, U.S. venture debt totaled $68.8 billion in 2025, with deal volume holding steady at approximately 1,000 transactions across the year. The stability in deal count alongside the growth in total capital deployed points to a clear trend toward larger individual transactions.
The median venture debt deal size in 2025 was $5.5 million, which is accessible for many growth-stage startups. However, the 75th percentile of deal sizes reached $27.7 million, indicating that a significant portion of the market is being driven by larger, more established borrowers pursuing more strategic financing arrangements. This concentration at the upper end of the market is worth noting for smaller startups that may find competition for lender attention more intense than the headline figures suggest.
A Closer Look at Venture Debt in Practice
In June 2025, ATEL Ventures provided $10 million in venture debt to Vial, an emerging biotech company, to support its growth initiatives. While biotech differs from manufacturing in some respects, the transaction illustrates the mechanics of venture debt in a capital-intensive, science-driven sector. Vial was able to access $10 million in growth capital without issuing new equity, preserving its cap table while funding the operational expansion it needed to reach its next stage. ATEL, as a specialist lender in this space, structured the deal with the kind of terms appropriate for a venture-backed company rather than requiring the asset coverage a conventional bank would demand.
This type of transaction is increasingly common across hardtech and manufacturing as founders become more sophisticated about the range of financing tools available to them and as specialist lenders develop deeper expertise in evaluating companies that make physical things.
Understanding the Financial Terms
A typical venture debt facility will carry an interest rate in the range of 8 to 15 percent per annum, depending on the lender, the borrower’s stage, and the broader interest rate environment. The loan term is usually between 24 and 48 months, with an interest-only period at the outset followed by principal amortization. Warrant coverage generally ranges from 5 to 20 percent of the loan amount, expressed as the right to purchase equity at the price of the most recent equity round.
To illustrate with a worked example, consider a manufacturing startup that raises $5 million in venture debt at 12 percent interest over a 36-month term, with 12 months of interest-only payments followed by 24 months of principal and interest. In the first year, the company pays approximately $600,000 in interest. From month 13 onward, it pays roughly $208,000 per month in principal plus the declining interest balance. The lender also receives warrants to purchase equity equivalent to 10 percent of the loan amount, or $500,000 worth of shares at the current round price. If the company grows and the share price increases, those warrants become valuable to the lender. If the company raises its next equity round at a higher valuation, the founder has preserved significant ownership by using debt rather than equity for this phase of growth.
Risks That Founders Should Not Overlook
The growth of the venture debt market has not been without signs of stress. Data from MSCI indicates that the share of venture debt loans marked at least 20 percent below their principal value increased from 9 percent in the first quarter of 2022 to 24 percent in the third quarter of 2025. That figure represents a meaningful deterioration in the health of the loan book across the market and suggests that a growing number of borrowers are experiencing financial difficulty meeting their obligations.
For founders, this is a reminder that venture debt is not a risk-free instrument. Taking on debt when the business is not yet generating sufficient cash flow to service it comfortably can accelerate a company’s difficulties rather than solve them. The obligation to repay does not pause if revenue falls short of projections, and lenders have recourse that equity investors do not.
The concentration of larger deals in the market also raises a practical concern for smaller startups. As lenders deploy more capital into fewer, larger transactions, the availability of smaller facilities for early-stage companies may become more constrained, and the terms offered to smaller borrowers may become less favorable.
Making the Decision
Venture debt occupies a specific and valuable place in the startup financing landscape, particularly for founders in manufacturing and hardtech who face high capital requirements and need to preserve equity for the long journey ahead. The record $68.8 billion deployed in the U.S. market in 2025 reflects genuine demand from founders who understand the instrument and are using it strategically.
The decision to pursue venture debt should be grounded in a clear-eyed assessment of the company’s cash flow trajectory, its ability to service the debt through the repayment period, and the value of the equity it would otherwise give up. When those conditions are favorable, venture debt can be a powerful tool for extending runway, funding growth, and reaching the next milestone from a position of strength.
