A bridge round is financing raised between major equity rounds to extend runway or fund a specific milestone push.

How it works

Companies typically raise bridge rounds when a full priced round is months away — because metrics need to improve, the market is soft, or diligence is dragging. Structure varies:

• Convertible notes or SAFEs from existing investors, often with a valuation cap
• Insider-led equity at the last round’s price or a modest markup/down round
• Venture debt or a bridge loan tied to an upcoming equity close

Bridge rounds are usually smaller and faster than a Series round. They often come with tighter terms: higher discounts, lower caps, board observer rights, or explicit milestones tied to the next raise. Amounts vary widely by stage, but bridges are rarely sized to fund years of operation — they buy quarters, not indefinite runway.

Lead investors from the prior round usually anchor bridge rounds because outsiders lack enough information to price interim risk quickly. That insider concentration can simplify closing but also limits price discovery if the company is underperforming.

Why it matters

• Founders: A bridge can buy time to hit revenue or product targets that unlock a better Series B. It can also signal weakness if outside investors pass and only insiders participate.
• Investors: Participation in a bridge is a vote of confidence — but terms matter. A bridge at a flat cap after missed targets may still be rational if the team is executing.

Common mistake

Calling any small raise a “bridge” when there is no credible path to the next priced round. That is a bridge to nowhere — capital that delays failure without changing outcomes.

Related ideas

See also bridge note, bridge to nowhere, insider round, and burn rate.