When to Start Raising a Bridge Round

What a Bridge Round Is

A bridge round is additional capital raised between major rounds — typically between seed and Series A, or between Series A and Series B. It extends runway when the company needs more time or capital to reach the metrics required for the next institutional round.

Bridge rounds are common and not inherently negative. But how you position them matters enormously — the difference between 'we're bridging to hit Series A metrics' and 'we ran out of money' determines whether investors participate or pass.

When a Bridge Makes Sense

You're 3-6 months from Series A metrics but running low on runway: A $500K-$1.5M bridge from existing investors extends runway to reach the threshold.

You've achieved significant milestones since the last round but aren't quite at the next round's bar: The bridge lets you complete the story before approaching new investors.

Your existing investors are willing to participate: This is the most important signal. If your current investors won't bridge, new investors certainly won't.

Market conditions have shifted: Sometimes external factors (market downturn, sector rotation) delay fundraising timelines. A bridge preserves optionality without accepting unfavorable terms in a down market.

How to Position a Bridge

Frame it as acceleration, not desperation:

'We've hit X and Y milestones since our seed. We're raising a $1M bridge to reach Z milestone, which positions us for a strong Series A in Q3.' This narrative works.

'We need more runway.' This narrative doesn't.

Specific positioning tactics:

- Use SAFEs or convertible notes with terms that reward bridge investors (discount or lower cap than next round) - Set a clear milestone deadline: 'This bridge funds us to $2M ARR, at which point we launch the Series A process' - Approach existing investors first — their participation signals confidence to any new bridge participants - Keep the bridge small relative to the next round — a $2M bridge before a $3M Series A raises questions about capital efficiency

Start the bridge conversation with existing investors when you have 6+ months of runway remaining. Waiting until you have 2-3 months creates the desperation dynamic you're trying to avoid.