Published: November 2025
Fundraising isn’t linear.
Sometimes the money from your last round just isn’t enough to hit the milestones you planned. Your runway is ending, but you still need a few more months before you’re ready to raise again.
“I’m doomed,” you might think. But is this really so?
Of course, no. For such cases, a bridge round exists.
This is when you raise funding between priced rounds to extend runway, hit the next proof-points, or capitalize on momentum you don’t want to lose.
Many founders see bridge rounds as a sign that something went wrong or that future investors might hesitate. But that’s not always true. In fact, plenty of strong companies raise bridges for purely strategic reasons. According to Carta, in Q2 2025, bridge rounds made up 16.6% of all venture capital raised, up from 11.8% in 2024.
In this guide, we’re going to discuss what a bridge round is, how it works, how to prepare for it, and, more importantly, whether that’s a smart move or a red flag.
Let’s dive in!
What is a bridge round of funding?
A bridge round (also called bridge financing) is an interim raise between priced rounds (e.g., Seed → Series A, Series A → Series B). It’s typically smaller and faster than a full round and is often led by existing investors.
In other words, a bridge round gives you extra venture capital to keep the company moving until the next major raise.
Founders typically run bridge rounds using either:
Convertible note / SAFE (most common for speed): converts into equity at the next priced round, usually with a discount and/or valuation cap.
Preferred equity (less common for early stage): a small priced round on terms similar to the last round, used when valuation clarity and investor conviction are high.
These rounds usually happen when your last raise is starting to run thin, but you’re not quite ready for the next one. On the timeline, that’s typically 6–18 months after the previous round, when you need extra runway to hit key metrics or when a sudden growth opportunity is too good to ignore.
Why startups raise bridge rounds
There are, actually, several important reasons why founders may decide to raise a bridge round:
To extend the runway to hit milestones You’re close to targets that drive your valuation (e.g., MRR, payback, retention, pilot-to-contract conversion), but you’re running out of cash. The bridge gets you there without taking a full-priced round too early.
To sustain or accelerate momentum You’re seeing faster-than-expected growth: the channel suddenly works, CAC drops, and an enterprise pipeline opens. So, it lets you press the gas now, not six months from now.
To de-risk the next priced round Validating a new pricing motion, shipping a critical feature, closing two lighthouse customers, or finishing a regulatory step? That’s all a bridge round can help you with.
To wait out slow markets Sometimes the market cools off. Investors take longer to decide, due diligence drags, or your lead wants one more quarter of numbers. A bridge gives you the breathing room to wait it out.
To prepare for a big move That’s a less common reason for early-stage companies. But a bridge can also help you get ready for an IPO, acquisition, or strategic partnership. It’s a way to top up cash and tidy things up before the next big event.
How bridge rounds work
Let’s have a look at how the bridge round of funding actually works and what you should do to run it:
Step 1: Start with existing investors
The first stop is usually your current investors. They already know the business, the team, and your board dynamics, which means they can move quickly. Most bridge rounds start as insider-led deals, with new investors joining only if there’s extra room or strategic value.
Step 2: Choose the instrument
As we’ve mentioned earlier, there are two ways to run a bridge round:
Convertible note / SAFE The quickest route with minimal legal work
Usually includes a discount (10–30%) and/or a valuation cap tied to your next priced round. However, notes may have a bit of interest and a maturity date.
Founders like this instrument because it helps avoid pricing the company today
Preferred equity (a “mini” priced round) Takes longer but gives clarity on valuation
Fits best when you’re performing well, investor demand is strong, or you want to tidy up the cap table with a small priced step.
Step 3: Price the incentive properly Bridge round investors are coming in before your next valuation is set, which means there’s still some uncertainty on how things will play out. To make it worth their while, they’ll expect slightly better terms than the next round.
And here’s what you can offer them:
→ A discount, where they convert into the next round at a lower price, typically 10–30% below whatever valuation you raise at.
→ Or a valuation cap, where they convert at the lower of either the cap or your next round’s valuation.
Step 4: Be clear on what the bridge is funding
Before you talk to investors, get specific on what this round is meant to do.
How much are you raising? How long should it last? And what exactly will it help you achieve?
You should think about 3–4 concrete milestones, like launching self-serve, signing a few enterprise clients, or hitting $500k in MRR.
So, everything (your model, data room, and investor reporting) should tie back to this plan, as it shows investors how you’re going to use their money.
Step 5: Keep it tight
Bridges are typically smaller, faster, and more focused, and are mostly closed in 2-6 weeks (not months). That’s why if it’s taking too long, that’s a sign something’s off. Maybe your story isn’t that sharp, or the terms feel unbalanced.
Pros and cons of raising a bridge round
| Pros | Cons |
| Buys you more time to hit key milestones | If progress is slow or unclear, future fundraising gets harder |
| Faster and simpler to close than a full priced round | Terms agreed in a rush can lead to more dilution than expected |
| Lets you position the round around growth, not survival | If it feels like a “keep the lights on” round, it can hurt investor confidence |
| Helps avoid setting a valuation too early in a tough market | Too many bridge rounds can make it look like you’re stuck |
| Clean and aligned if existing investors lead | New investors might ask for special rights or changes in governance |
| If things are going well, you can keep terms founder-friendly | If not, investors may push for tougher terms like lower caps or board seats |
Related read: Non-dilutive funding [101 Guide]
So, do I actually need a bridge round?
If you don’t know the exact answer to this question, we’ve prepared a checklist that can help you figure out whether you need a bridge round of financing or not.
Start with context and ask yourself:
- What’s the one (or two) milestones that would meaningfully increase our valuation?
For example: landing 2–3 enterprise logos, crossing $1M ARR with <10-month payback, hitting 120%+ net retention on 3 cohorts, regulatory approval in hand, etc.
- Can we realistically hit those milestones in 6–12 months, with a budget that makes sense?
If not, the bridge might just delay the inevitable, and a larger round or strategic reset may be better.
Then, run the economics:
How far will this amount of capital actually take us? If a small slip breaks the plan, it may be too tight or too risky.
Will hitting the plan actually unlock interest for the next round? Write down 5–10 funds you’d go to next. What specific metrics do they need to see?
Is the dilution from this bridge less painful than raising a priced round now? Compare the cap/discount math on a note vs. what you’d give up today in an equity round.
Are insiders willing to back it? If not, why? Best to surface and solve concerns early before going to new investors.
And, finally, check if you’re execution-ready:
Do you have a one pager that clearly ties dollars → hires → KPIs → next round?
Is your model current, with sensitivities investors actually care about (CAC, sales cycle, etc.)?
Is your deck built for a bridge?
Do you have a real CRM and investor pipeline in place?
Are you ready for clean monthly reporting?
If you can answer “yes” to most of these, bridge financing may be the right move for you. If not, you might be better off tightening burn, raising a fuller round now, or reframing your plan around fewer, sharper milestones.
Final thoughts
Don’t treat a bridge round as just a backup plan. If you do everything right, it becomes a smart move to buy time, build momentum, and protect your valuation.
Startups that want to raise a bridge round should typically have three things: a clear story, a simple plan, and investor trust. This means that you know exactly what you’re raising for, how to benefit from every dollar invested, and how this round sets you up for the next one.
So, if you want to make bridge financing your case, consider the following things:
Be honest about what’s working and what’s not
Keep the ask simple and your milestones specific
Start with insiders and move quickly
If you need any assistance with fundraising, we’re here for that.
At Waveup, we’ve helped hundreds of startups run successful rounds, from building the deck to modeling the numbers and planning the strategy end-to-end.
Talk to us and let’s discuss the details.
Also, check out our subscription-based service Waves by Waveup and get ongoing help and insights across fundraising, investor materials, and strategy in a flexible way.
FAQs
What is a bridge round of funding?
A bridge round is a short-term raise between two larger funding rounds. It gives you extra runway to hit milestones, prove traction, or wait for the right market timing before the next big raise. It’s called a “bridge” because it literally bridges the gap between rounds.
How is a bridge round different from a seed round?
A seed round is your first major raise, and you typically use this money to build the product, validate the idea, and get early traction. A bridge round usually comes later, after the seed or Series A. It’s smaller, faster, and meant to extend runway or fund specific goals, not restart the business.
How do you raise a bridge round?
Most founders start with existing investors, as they already know the company and can move quickly. Bridge rounds are often done through convertible notes or SAFEs, which later convert into equity at a discount or valuation cap in the next priced round.