Bridge rounds: the convertible that saves you, or signals you ran out of runway

A bridge round is the most misunderstood instrument in the early-stage toolkit. Half the founders who close one describe it as a victory — they bought time, they hit the milestone, they priced the next round at a higher number than they would have otherwise. The other half describe the same instrument as the moment the wheels started to come off — investors smelled weakness, the next round took eighteen months instead of six, and the eventual price was a flat round at best.

Same instrument. Different outcomes. The variable is preparation.

What a bridge actually is

A bridge round is a convertible financing — usually structured as CCPS or a convertible note — designed to extend the company's runway between two priced rounds. The capital comes in now; the shares are issued at the next priced round, at a discount or a cap to that round's price.

The economic logic is simple. The company doesn't have the metric yet to justify the price it wants for the Series B (or C, or Series A depending on stage). It needs another 6–9 months of operating runway to hit that metric. Going to market now at the current numbers gets a flat round or worse. A bridge gives the company that time, with the bridge investors getting a preferred price for taking the early risk.

The two flavours

Two structures dominate.

Discount-based. The bridge investor converts at a defined percentage discount to the next round's price per share. Twenty percent is market standard; we sometimes see 15% on a tight bridge or 25-30% on a longer or riskier one.

Cap-based. The bridge investor converts at the lower of (a) the next round's price, or (b) a price per share implied by a defined valuation cap. The cap is usually set at the company's current implied valuation or slightly above, on the theory that the bridge investor should at minimum get the price the company is worth today, with upside if the next round prices higher.

Most bridges combine both. Cap and discount, whichever is lower. The bridge investor's effective conversion price is the more favourable of the two mechanisms. Founders often agree to this without modelling out which of the two will bind — and usually, the cap binds, because the discount only matters if the next round prices below the cap implied price.

When a bridge works

We have run bridges that closed in three weeks, with existing investors taking 70% of the round and a small new check from a strategic angel completing it. Those bridges saved companies. The pattern is consistent.

Defined milestone. The bridge is sized to a specific revenue or KPI target that will price the next round. Not 'more growth'. A specific number — ARR of ₹X crore, monthly active users of Y, a marquee customer signed. The investors know what the milestone is. The founder knows it. The board knows it. The bridge round is sized to give the company enough runway to hit that target with margin.

Existing investors lead. When existing investors put in at least half the bridge, the signal to the market is positive. The people closest to the company chose to commit more capital. New investors at the next round read this as confidence.

Tight pricing. Cap set at or modestly above the previous round's price. Discount in the 15–20% range. Not a punitive structure designed to extract maximum value from the company's vulnerability — a structure that reflects that the existing investors believe the next round will price meaningfully higher.

Short conversion window. Bridge investors expect the next round to happen within 6–9 months. If the conversion window stretches to 18 months or longer, the bridge starts to look less like a bridge and more like a permanent overhang on the cap-table.

When a bridge signals trouble

The other version. Same instrument, different surrounding fact pattern.

No defined milestone. The bridge is sized to 'extend runway'. When a new investor at the next round asks what specifically the bridge was meant to achieve, the founder cannot answer cleanly. The signal: the company doesn't have a clear path to the next round. It's buying time, not building toward a milestone.

Existing investors don't participate or participate token amounts. This is the loudest possible signal. The investors who know the company best are not putting in more money. New investors at the next round read this as a lack of conviction, and they're usually right.

Aggressive pricing. Cap set below the previous round's price. Or a large discount (25%+) combined with a low cap. The bridge investors are extracting protection because they believe the next round may price flat or down. This protection comes off the founder's slice.

Long or undefined conversion window. Bridge has a 24-month longest-stop date with no defined trigger event. The bridge investors aren't expecting a clean next round; they're hedging.

The bridge-to-nowhere

There is a specific failure mode worth naming. The company raises a bridge, burns through it over 12 months, hits some but not all of the planned milestones, and then needs another bridge. The second bridge is harder to raise — existing investors have already extended once, and the metrics haven't moved enough to justify a priced round.

The second bridge usually has worse terms than the first. Lower cap, higher discount, often with new structural protections (super pro-rata, ratchet, drag-along reservations) that the founder accepts because they have no other option.

By the time a third bridge is needed, the company is in a managed wind-down or a forced sale. We have watched this trajectory play out half a dozen times. The first bridge looked fine. The second was the warning. The third was the failure.

The question on a bridge is never 'can we raise it'. It's 'do we know what we're raising it for, and do we believe the milestone is achievable within the runway it provides'. If the answer to either is unclear, the bridge will not save the company. It will just delay the conversation.

Pricing the next round on bridge conversion

An underrated complexity. When the bridge converts at the next round, the conversion mechanic interacts with the next round's anti-dilution clause in ways that surprise founders.

Example. Bridge of ₹10 crore at a ₹100 crore cap, 20% discount. Next round closes 9 months later at ₹150 crore pre-money. Bridge converts at the cap (since the cap-implied price is lower than the discounted next-round price). Bridge investor's effective ownership: roughly 9% post-conversion before the new round.

The new investor's anti-dilution clause, if it's broad-based weighted-average, treats the bridge conversion as part of the dilutive issuance. This means the existing pre-bridge shareholders (founders, seed investors, Series A investors) absorb the bridge's dilution. The new investor's 20% is calculated against a cap-table that already includes the converted bridge.

If the founder didn't model this in the bridge term sheet — and most don't — the result is a Series B (or Series C) cap-table that has 3-5 percentage points less founder ownership than the founder expected.

Who should take a bridge from existing investors

Existing investors leading a bridge is the right pattern when they have meaningful reserves earmarked for the company. Most institutional funds size their reserves at 1.5x to 2x of the initial check, specifically to support bridge and follow-on rounds. If the fund has reserves and the company is on a defensible trajectory, the bridge is a natural extension of their commitment.

Existing investors leading a bridge is the wrong pattern when they're putting in money to protect their existing position rather than because they believe in the trajectory. This is sometimes called 'good money after bad' — the investor doesn't want to mark down the position, so they extend the runway to delay the markdown. It's a defensive move, not a growth move.

Founders often can't tell the difference in the moment. The conversation looks similar from the company's side. The way to distinguish: ask the lead investor to commit to participate in the next priced round at a defined minimum amount. If they will, the bridge is a growth play. If they won't, it's defensive.

What we do at engagement

Two things, before any bridge term sheet gets signed. First, build the next-round model with the bridge converted, under three scenarios — flat next round, modest up round, strong up round. Show the founder the cap-table in each. Second, run the conversation with existing investors first. Their willingness to lead or participate is the single best signal we have for whether the bridge will work.

If the existing investors won't lead, we usually advise the founder to skip the bridge and either (a) cut burn aggressively to extend runway organically, or (b) go straight to a priced round at the current numbers, even if the price is disappointing. A flat priced round is almost always cleaner than a defensive bridge.