How to Raise a Bridge Round: Structure, Signals, and Terms
Bridge round fundraising: when to raise a bridge, how to structure it (SAFE, note, or extension), signaling risk to next-round investors.
How to Raise a Bridge Round: Structure, Signals, and Terms
Overview
A bridge round is capital raised between priced rounds — typically because you need more runway to hit the milestone the next lead will underwrite. Done well, a bridge extends your options. Done poorly, it signals weakness that follows you into the next raise.
This guide covers when to bridge, how to structure the paper, and how to talk about it with next-round investors.
When to raise a bridge
You're 6–9 months from the next milestone but only 3–4 months of runway.
You have inbound interest from a next-round investor who wants more traction first.
Existing investors have offered to extend and the terms are clean.
You need capital for a specific bet (a hire, a channel) that materially changes the story.
When not to raise a bridge
A bridge is not a substitute for a real round when the business isn't working. If retention is dropping, the market is shrinking, or unit economics aren't improving, more runway won't fix it — bridging just delays the hard call and dilutes existing shareholders in the process.
Structuring the bridge
Existing-investor extension: usually a new SAFE or note at the same cap, or a small discount to the last round.
New-investor bridge: SAFE with an MFN clause, cap set at a modest step-up from the last round.
Convertible note bridge: interest and maturity date; useful when you need a firm 'convert or repay' trigger.
Priced extension: rare; only if terms are materially better than the last round.
Signaling risk
Bridges send signals. A small extension from existing investors reads as confidence; a large bridge from new investors at a flat cap reads as trouble. Talk about the bridge as a bet on a specific milestone, not as 'we couldn't raise a full round yet.'
Terms to negotiate
Cap: as high as the market supports without breaking the next-round narrative.
Discount: 15–20% typical if the bridge is coming from new investors.
MFN: standard on SAFE bridges — protects the bridge investor from later worse terms.
Warrants: only if you're raising from strategic capital that expects them.
Typically 20–40% of your last round. Larger bridges start to look like new rounds and should be structured accordingly.
Will a bridge hurt my next round?
Only if it looks like a lifeline. A tight, well-scoped bridge tied to a specific milestone is a normal part of building a company. A large, sudden bridge at a flat cap raises questions the next investor will ask.
Should I use a SAFE or a note for a bridge?
SAFE if you and your investors are comfortable with no maturity date. Note if you want a firm 'convert or repay' trigger — useful when the bridge is meant to hold you to a specific timeline.
