Round Ready Academy — Lesson 7 of 11

A bridge is one of the highest-stakes decisions a founder makes. Get the structure right and you preserve optionality for the next priced round. Get it wrong and you spend the next eighteen months apologising for it.

This lesson is the decision tree: when a bridge is the right answer, when it is not, what the alternatives look like, and how to position a bridge thesis without the market reading it as distress. Writing is grounded in what Opagio has seen across the bridge decisions founders have brought us in the last eighteen months.

★ Key Takeaway

A bridge is not a substitute for a priced round. It is a structured instrument designed to carry the business over a specific, defensible milestone — with terms that anticipate, rather than delay, the next priced round. Bridges that are used as "raising without pricing" tend to create larger problems than they solve.

Step 1 — What Is the Bridge Actually For?

Before any structure question, the first test is whether a bridge is the right answer. The honest question is: what specific, measurable milestone will the bridge capital carry you to, and how does hitting that milestone change the price of the next round?

Good bridge theses pass this test in one sentence:

  • "The bridge funds the product release that takes us from £1.8M to £3.0M ARR, at which point our NRR cohort crosses 120% and supports a Series B at a materially higher pre-money."
  • "The bridge funds the two regulatory approvals that unlock the enterprise segment, extending our SOM by 4x and changing our comparable set."
  • "The bridge funds the three enterprise logos already in procurement, whose landing changes our concentration story and our Series B multiple."

Bridges that fail this test are often dressed-up versions of "we need another twelve months":

  • "The bridge gives us more time to find product-market fit."
  • "The bridge buys runway while we work out the next round."
  • "The bridge smooths a slow patch."

These are rarely bridges; they are delayed down-rounds. The distinction matters because bridge pricing, bridge terms, and bridge signalling all depend on whether there is a specific, measurable milestone at the end of the capital.

Step 2 — Bridge, Extension, Venture Debt, or Equity?

Once you have a defensible bridge thesis, the instrument question becomes straightforward. Four main instruments are available; the choice depends on the thesis, the cash need, and the existing cap table.

Four Instruments, Four Use Cases

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Instrument Typical structure When it fits When it does not
Bridge (SAFE or convertible note) 12-24 month maturity, discount to next round (typically 15-25%), optional valuation cap Clear milestone, clear next round, existing investors supportive No visible path to a priced round
Extension (priced) New share class at priced valuation, typically flat or modest uplift from last round Existing round was under-raised relative to progress, new lead available Existing cap table would be materially impaired
Venture debt Senior secured debt, 2-4 year term, warrant coverage 5-15% Predictable cash flows, hard asset or ARR collateral, mature operations Early-stage, choppy revenue, no collateral or ARR stability