पाठशाला Pathshala · धन Dhan, Money · Lesson 19 · Build

Bridge rounds and extensions: the raise nobody wants

A bridge is a loan of time from the investors who know the company best. It works when it reaches a milestone that earns the next round, and it fails when it only postpones the question.

Pathshala, The Founder Library · 11 October 2026 · 7 min read

Howrah Bridge spans the river above the Kolkata cityscape in black and white. — Photograph: Trishik Bose · Pexels

Nobody plans a bridge. It is the round a company raises when the last one has run out before the next one is ready, and it is raised from people who already know exactly how far behind plan the company is. Done well, it buys the months that turn a good company into a fundable one. Done badly, it is the first of several.

This lesson covers why bridges happen and why investors dislike them, the milestone test every bridge must pass (with a figure to run it), why insiders must lead, the terms that keep the next round possible, the cut that should come first, and how to tell the next investor.

Why bridges happen, and why everyone dislikes them

Most bridges are the product of one optimistic assumption: that the next round would arrive on the plan’s timetable. It usually does not. Carta’s analysis of more than 3,000 US startups that raised a Series A in 2025 found that 39 per cent did so three or more years after their seed, against 15 per cent that took less than a year. A seed round sized for eighteen months leaves most companies short of the gap, and the difference is made up by a bridge, an extension of the last round, or a shutdown.

Investors dislike bridges for a reason founders should respect. Paul Graham drew the line in How to Raise Money: raising when you do not need money is one kind of fundraising, and raising when you do is another, conducted from weakness. A bridge is almost always the second kind. The existing investors must decide whether to put more money into a company that has missed its plan, and every outside investor who hears of it asks what the insiders know. Neither question is answered by a better deck. Both are answered by a milestone.

Bridge to what? The milestone test

A bridge needs a destination, written as one sentence with a date and a number: ‘₹1 crore of monthly revenue by March, growing eight per cent a month’, or ‘a signed contract with a second enterprise customer and a live pilot with a third by June’. The milestone is the evidence the next round’s investors will pay for, and it should come from them; ask two funds you would pitch what they would need to see. Then the arithmetic: the months to the milestone, plus the months the next round takes to close, plus six months of slack in case either takes longer. That is the distance the bridge must cover.

A historic Nepalese temple stands wrapped in bamboo scaffolding during renovation. — Scaffolding holds a structure while the real work is done. It is never the building. Photograph: Sanej Prasad Suwal · Pexels

Take a company with ₹3 crore in the bank burning ₹60 lakh a month, five months of runway. Its milestone is fourteen months away and the next round will take four months to close: eighteen months to cover. A ₹3 crore bridge with a fifteen per cent cut in burn buys about twelve months, a bridge to nowhere. A ₹5 crore bridge with a thirty per cent cut buys nineteen months, which reaches the close with one month to spare: too thin. The figure lets you find the combination that leaves six months, or shows that none does.

Three things to read off it. The cut is worth more than it looks, because it works on every month of the bridge and the money that follows. A milestone that moves out by three months needs a larger bridge than founders expect, because the cash line must reach the close, not the milestone. And if no realistic bridge and cut reach the close with slack, the honest options are different ones: a smaller milestone the company can reach, becoming default alive on the cash it has, or a sale while the company still has time to run a process.

A bridge is a loan of time. Raise it only when you can name the milestone it reaches, the date you reach it, and the round that milestone earns.

Insiders first: who leads a bridge

A bridge is led by the existing investors, or it is very hard to raise at all. They know the company, they can decide in days, and their participation is the only signal an outsider trusts. Ask each existing investor, in one conversation, for its pro rata share of a bridge of a stated size, and give the milestone, the date and the cut. Expect one of three answers. Full participation from the lead is the strongest signal and usually brings the others. Partial participation is common and workable if the gap can be filled by new angels or a smaller cheque. A refusal from the lead is information: it means the lead does not believe the milestone, and the founders need to know why before they ask anyone else.

Do not run a bridge as a broad outside raise. A round marketed to thirty new investors while the insiders sit out tells each of them the same thing, and closes slowly if it closes. If outside money is needed, bring in one or two investors who know the sector, with the insiders committed first and the terms already set.

Terms that keep the next round possible

The bridge’s terms will be read by every later investor, and some terms make the next round harder to raise than the bridge was. Prefer a simple instrument. In India that usually means an iSAFE or compulsorily convertible debentures that convert at the next priced round, or an extension of the last round’s CCPS at the same price; [the bridge instrument lesson](/library/isafe-safe-and-ccd-choosing-bridge-instrument) compares them. For a non-resident investor, the Reserve Bank’s Master Direction allows convertible notes from a recognised startup for ₹25 lakh or more in a single tranche, converted or repaid within ten years. Every instrument is a private placement, with the board and shareholder resolutions and the return of allotment within fifteen days that section 42 requires.

Then the economics. A moderate discount to the next round and a valuation cap at or near the last round’s price reward the risk without punishing the company; a cap far below the last price is a down round described differently. Refuse the terms that poison the next round: a full-ratchet anti-dilution adjustment, a liquidation preference above one times, participation, a preference ranking ahead of all earlier money, and board changes that come with no new capital. Each of these is something the next lead will ask to be undone, and undoing it costs time the company does not have. [The term sheet lesson](/library/term-sheet-clause-by-clause) explains why ratchets make bridges so expensive.

Cut before you bridge, and say so

The cut belongs before the bridge, not after it. A company that asks its investors for money while burning at the rate that created the gap is asking them to fund the plan that failed. Decide the cut first, from the work that does not move the milestone: hiring ahead of plan, channels that do not pay back, projects that serve the next year rather than the next milestone. Make it once, deeply enough that it does not need repeating, and present it with the bridge request as a single plan. Investors who see the burn already falling at the moment they are asked for money read the request very differently.

Telling the next investor

The next round’s investors will see the bridge on the cap table and ask about it, so tell them before they ask. One paragraph: the original plan, what took longer, the milestone the bridge was raised to reach, who put in the money, what the company cut, and what it achieved. A bridge that reached its milestone on time is a good story, because it shows founders who planned, cut and delivered under pressure. A bridge explained only when found in diligence looks like something hidden.

The bridge decision, on one page and one date

Start the bridge conversation when runway falls below nine months, not three. Write one page: the milestone as a sentence with a number and a date; the months to reach it and the months to close the next round; the bridge size and the cut from the figure above, with six months of slack; the instrument and its discount and cap; and each existing investor’s expected participation. Send it to the lead investor first and agree a decision date two weeks out. While the bridge is open, review cash against the milestone monthly at the close; if the milestone slips by more than a quarter, revisit the page before the cash makes the decision.

Nothing here is legal, tax or investment advice. The foreign-exchange and private placement rules were checked on 11 October 2026; have the instrument and its documents reviewed by a lawyer who has closed Indian bridge rounds.