A startup may raise additional capital between larger financing rounds for a variety of reasons. A bridge round can give a company more time to reach key milestones before its next financing, but in some cases can signal missed targets, limited cash, or difficulty attracting new investors.
For private investors, the key question is what the company is bridging toward? In this week’s blog, learn more about what bridge rounds can signal about a startup’s position and what investors may want to consider before investing.
What Is a Bridge Round?
A bridge round is an interim financing that provides a startup with capital to reach its next major financing or milestone. As the name suggests, it “bridges” the gap between the company’s current funding and what comes next. In the second quarter of 2025, 16.6% of all capital raised by startups on Carta was raised through bridge rounds, up from 11.8% a year earlier.[i]
For example, assume a startup raised a $15 million Series A but needs another year to reach the revenue growth it believes could support a Series B. Rather than raise the Series B immediately, it could raise a $5 million bridge round to extend its runway and reach those targets. Bridge rounds are typically structured through SAFEs or convertible notes that convert into equity during a future financing.
Why Does a Company Raise a Bridge Round?
Why a startup needs a bridge can say a lot about its position. There are three main reasons why a company might choose to raise a bridge round:
- Sustaining Operations – product development may take longer than expected, sales cycles may extend, or regulatory approvals may be delayed
- Milestone Achievement – the startup may desire to use the capital to reach specific milestones in order to bolster valuation and attractiveness in future funding rounds
- Strategic Positioning – a bridge round may provide a buffer period to negotiate better terms for a subsequent funding round
Consider a startup with $10 million in annual recurring revenue (ARR) that expects to reach $20 million within the next year. Management may believe another year of growth could support a higher valuation, with a bridge providing the runway needed to reach that target.
The situation looks different if the company expected to reach $20 million in ARR with its existing capital but fell well short. In that case, the bridge could signal slower growth or higher spending than expected. Both companies may be raising a bridge round, but for very different reasons.
Who Is Participating in the Bridge?
Who participates in a bridge round can also provide insight into the company’s position. Existing investors committing additional capital may signal continued confidence in the business, while new investors can provide outside validation and potentially support future rounds.
An insider-only bridge can be harder to interpret. Existing investors may be providing capital because they remain confident in the company, or because the startup struggled to attract new investors. The makeup of the round is worth considering alongside the company’s performance, financing terms, and reason for raising the bridge.
What Do the Terms Say About the Company’s Position?
The terms of a bridge round can provide insight into the company’s negotiating leverage. A company with stronger performance and investor demand may have more flexibility on terms, while one facing a cash shortage or limited demand may need to offer more investor-friendly terms.
A bridge structured through a convertible note could include a discount or valuation cap, allowing investors to convert at a lower effective price in the next financing. Other terms may include warrants or additional investor protections. These features do not necessarily mean a company is struggling, as some are common in convertible securities. However, terms that are significantly more investor-friendly than the company’s previous financing could signal that investors see greater risk in the company.
What Is the Bridge Supposed to Accomplish?
An important question is what the company expects to achieve before the bridge capital runs out. A bridge tied to a specific milestone, such as reaching a revenue target, launching a product, receiving regulatory approval, or entering commercial production, can provide a clearer path to the next financing and may help the company avoid raising a larger round at an unfavorable time.
The amount raised also matters. Suppose a startup needs 12 months to reach a major product milestone but raises enough capital for only six months. Unless it can reduce spending, increase revenue, or secure more capital, it may need to fundraise again before reaching that milestone. A bridge that provides enough runway to reach a clear objective can look very different from one that simply keeps the company operating for a few more months.
What Can a Bridge Round Mean for Private Investors?
A company’s financing history can provide important context for investors. A first bridge may simply reflect a timing gap between the company’s cash needs and its next major milestone, while repeated bridge rounds without meaningful progress in revenue, product development, or investor interest could indicate that the company is extending its runway without addressing underlying challenges.
Bridge rounds can also result in dilution, although the impact may be deferred when the financing is structured through convertible securities. SAFEs and convertible notes generally dilute existing shareholders when they convert into equity in a subsequent financing, with conversion discounts and valuation caps affecting the number of shares issued. Warrants may also have dilutive effects depending on their structure.
There is also a risk that the bridge does not solve the company’s financing needs. If the startup misses its targeted milestone or cannot raise its next round, it may need another bridge, reduce spending, pursue a sale, or, in some cases, wind down.
Final Thoughts
A bridge round is not necessarily a good or bad sign. It may give a startup the time it needs to reach an important milestone or approach its next financing from a stronger position. In other cases, it may reflect missed targets, limited runway, or difficulty raising capital.
For investors, the reason behind the bridge matters. How much runway it provides, what the company plans to accomplish with the capital, who is participating, and the terms of the round can all help put the financing into context.
Ultimately, what matters is what the company is bridging toward and whether the additional capital gives it enough time to get there.
Are you ready to invest in startups? Sign up for a MicroVentures account to start investing!
Want to learn more about investing in startups? Check out the following MicroVentures blogs to learn more:
- Understanding Priced vs Unpriced Rounds
- Investor Insights: Understanding Down Rounds
- Startup Valuations: Understanding the Numbers
- How Subsequent Funding Rounds Affect Your Investment
[i] https://carta.com/data/bridge-rounds-q2-2025/
Important disclosure
The information presented here is for general informational purposes only and is not intended to be, nor should it be construed or used as, comprehensive offering documentation for any security, investment, tax or legal advice, a recommendation, or an offer to sell, or a solicitation of an offer to buy, an interest, directly or indirectly, in any company. Investing in both early-stage and later-stage companies carries a high degree of risk. A loss of an investor’s entire investment is possible, and no profit may be realized. Investors should be aware that these types of investments are illiquid and should anticipate holding until an exit occurs.
