Venture debt is a loan structure that lets venture-backed startups raise capital without an immediate equity issuance, usually stacked alongside an equity round rather than replacing it. Founders asking what venture debt is are usually trying to work out one thing: is there a way to extend runway without giving away more of the company.
The short answer is that its debt financing built for high-growth companies, assessed against investor backing and growth prospects as well as more conventional measures like cash flow and repayment capacity.
Unlike a conventional business loan, venture debt leans more heavily on a company's existing investors and growth trajectory than a typical bank would, though lenders like HSBC still assess how the loan will actually be repaid. It's generally described as a minimally dilutive form of non-dilutive funding, since it avoids an immediate share issuance even though warrants can later give the lender a small equity stake.
This guide walks through what venture debt actually is and how it's structured, when it makes more sense than raising further equity, which lenders are active in the UK, and the covenants worth scrutinising in any venture debt term sheet before signing.
How Venture Debt Is Structured
Understanding what venture debt looks like mechanically starts with sizing: it's commonly benchmarked at 20–35% of a company's most recent equity round, repaid over a two-to-four-year term with an interest-only period before principal repayments begin. That's Carta UK's benchmark; Arc sizes facilities differently, at 6–8% of a company's last post-money valuation. The two figures aren't contradictory; they measure against different bases, so founders comparing offers should ask which one a lender is quoting against.
Most facilities run an interest-only (I/O) period of roughly six to twelve months before amortisation kicks in. Lenders also typically attach warrants the right, not the obligation, to buy a slice of equity at a fixed price later but warrant coverage (often quoted as a percentage of the loan amount) and the eventual equity dilution it causes if exercised are two different measurements, not interchangeable ones. The exact warrant term varies by agreement, so it's worth confirming specifics with any given lender.
For UK companies, interest payments generally attract corporation tax relief, but the UK's corporate interest restriction rules can limit that relief. The £2 million figure often cited is a de minimis threshold rather than a hard cap, and the rules operate at group level with further mechanics and exemptions worth taking to an accountant rather than treating as a simple formula.
Venture Debt vs Equity: Which Makes Sense and When
The venture debt vs equity decision usually comes down to one trade-off: debt preserves ownership and doesn't typically carry the same governance rights lenders negotiate for, but it comes with fixed repayment obligations, while equity dilutes the cap table but carries no obligation to repay if the business doesn't work out. Venture debt lenders generally don't receive the same board representation as equity investors, though this varies by structure rather than holding as an absolute rule.
Where venture debt earns its keep is in timing; it's one of the more established ways a company can delay an equity round in a difficult fundraising market, buying time to hit milestones and potentially raise the next round at a stronger valuation. That's a large part of the answer whenever founders ask what venture debt is actually for. It's also worth considering, though not as a universal response, that some future equity investors may view scheduled debt repayments as a less efficient use of growth capital.
Eligibility narrows the choice too. Lenders generally prefer companies with meaningful cash runway remaining, since raising debt when cash is already tight increases repayment and refinancing risk though the specific threshold varies considerably by lender rather than following one fixed industry rule.
Non-Dilutive Funding: Where Venture Debt Fits Among the Alternatives
Non-dilutive funding covers any capital a startup raises without an immediate equity issuance, and venture debt is one option among several. Alternatives include revenue-based financing, asset finance, grants, convertible instruments, and traditional bank debt, each suited to different stages and cash-flow profiles; pricing and structure vary enough by provider that any single percentage quoted should be treated as provider-specific rather than a market-wide benchmark.
The UK and European market for this kind of non-dilutive funding has grown considerably. Europe's venture debt and growth lending market reached $19.78 billion in 2024, growing at a 21% compound annual rate since 2018, according to the Stride Ventures and Kearney Global Venture Debt Report 2025. The UK is the most active single market within that figure, accounting for roughly 18% of all European venture debt and growth lending deals in 2024, with late-stage companies drawing 82% of total value.
That scale is backed by tangible outcomes closer to home too. The British Business Bank's own Debt Funds programme, evaluated by SQW and Beauhurst, estimated an average net impact of around £7.5 million in turnover per Venture Debt and Prefequity recipient over a four-year period, alongside roughly 1,400 net new jobs created across the programme to March 2023 a modelled estimate from the evaluation methodology rather than observed guaranteed growth, but a reasonable indication that non-dilutive funding is doing measurable economic work in the UK.
Active Venture Debt Lenders in the UK
HSBC Innovation Banking, Columbia Lake Partners, and Claret Capital are among the most active venture debt lenders in the UK, alongside newer entrants like Atempo Growth and BlackRock's Kreos Capital business, which BlackRock acquired in 2023.
HSBC Innovation Banking was named Europe's most active venture debt provider in 2024, backing 65 companies according to Sifted's tracking of publicly announced deals a position DWF Group's UK venture debt market review also places it in for the following year, with Columbia Lake Partners and Claret Capital among the other consistently active names.
Traditional banks with dedicated innovation arms sit alongside specialist private credit funds in this market, and deal terms have reportedly grown more standardised in recent years as the market has matured.
Reading the Term Sheet: Covenants Founders Should Scrutinise
Every venture debt term sheet contains covenant conditions the company must meet to stay in good standing that generally fall into three categories: affirmative, negative, and financial. Affirmative covenants are the "do's," typically requiring the company to deliver regular financials and maintain insurance. Negative covenants are the "don'ts," commonly restricting things like taking on additional debt, making acquisitions, or paying shareholder distributions without lender consent always subject to the specific wording of the agreement in question.
Financial covenants are usually the ones that catch founders out, since they're tied to ongoing performance rather than a one-off action. These vary considerably between deals and may track EBITDA growth, a minimum liquidity threshold, revenue or ARR targets, or specific milestones and it's not unusual for a venture debt agreement to carry no financial covenants at all, since some lenders underwrite more heavily against the quality of a company's existing investors than its recurring revenue or hard assets.
The stakes of getting this wrong are real, even if the path to it isn't automatic. Breaching a covenant can trigger default, and in a worst-case enforcement scenario, a company that can't repay the outstanding balance can ultimately lose control of the business. Before signing a venture debt term sheet, founders should ask exactly how quickly a lender responds to consent requests, and try to carve out explicit permission upfront for any transaction, like an acquisition, that's already on the horizon.
FAQ
1. What is a venture debt term sheet?
A venture debt term sheet sets out a proposed deal's core terms before signing loan amount, interest rate, warrant coverage, covenants, and repayment schedule. Warrants typically give the lender the right, not the obligation, to buy shares at a fixed price at a future date, with the exact term varying by agreement.
2. How does venture debt work in the UK?
UK venture debt is provided by both bank innovation divisions and specialist private credit funds, and is typically raised alongside not instead of an equity round once a company already has investor backing. Terms, speed, and process vary by lender rather than following one fixed pattern.
3. Is venture debt better than equity for startups?
Neither is categorically better; the right choice depends on stage, runway, and risk appetite. Venture debt can reduce dilution relative to a full equity round and let founders negotiate their next raise from a stronger position, but it's best understood as a layer within the capital stack that complements equity, not a wholesale replacement for it.
Also read: Beyond the Cheque: How UK Corporate Venture Capital Actually Works
Sources: Data drawn from Carta UK, Arc, HSBC Innovation Banking, the Stride Ventures and Kearney Global Venture Debt Report 2025, the British Business Bank's Debt Funds evaluation (with SQW and Beauhurst), Sifted's venture debt provider rankings, DWF Group's UK venture debt market review, and SVB. Figures reflect the most recent available data at the time of writing.
The EP+ Editorial Desk covers UK startups, founder stories, and venture capital. All editorial content is independently produced and human-reviewed before publication.
