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Bridge Round, Extension or Venture Debt? The Runway Math Investors Use to Decide Whether You Are Still Fundable
If your next milestone is 4 months away and your runway is 5, bridge. If it is 12 months away, you are not bridging, you are raising. The runway math, pricing and true cost of bridges, extensions and venture debt.
Published 27 September 20266 min read
The short answer
Bridge only when a specific milestone that changes your valuation is reachable within the new runway, with at least 3 months to spare for the next raise. An extension (more money at the last round's price and terms) is best when insiders are enthusiastic. Venture debt costs far less dilution but adds a large monthly repayment after the moratorium, so it works best right after an equity round, not in place of one. If the milestone is 12 months away, raise a proper round instead.
Who this is for: Founders with 4 to 9 months of runway left who have raised at least one institutional round and are deciding how to reach the next one.
Summary: what most founders miss
- A bridge is judged by where it leads. Investors ask "bridge to what?" before "how much?".
- Insider participation is the signal new investors read first. Existing investors declining to bridge is louder than any pitch.
- Venture debt of ₹4 Cr at 15% adds about ₹19 lakh a month of repayment once principal starts. It extends runway only if you plan for that.
- Convertible bridges with deep discounts and no cap push the pain into your next round's cap table.
- The best time to arrange venture debt is within 3 to 6 months after an equity round closes, when lenders have the most comfort and you have the most choice.
Most bridge rounds are raised for the wrong reason. The company is running low on cash, the next round is not ready, and the founders ask existing investors for "a little more to get us there". Sometimes that works. Often it buys six months that end in the same place, with more dilution and less credibility. The difference is whether the bridge leads to something that changes how investors will price the company.
Bridge, extension, venture debt: what is the difference?
| Option | What it is | Typical pricing | Best when | Main risk |
|---|---|---|---|---|
| Extension | More money added to the last round, at the same price and terms | Flat to last round | Insiders are keen; metrics have improved since the round | Signals the round was sized too small |
| Convertible bridge | Note or iSAFE that converts at the next round | 10% to 25% discount, sometimes a cap at the last post-money | Next round is 6 to 9 months away and clear | Discount and cap stack on the next round |
| Priced bridge or down round | New priced round, often at or below the last price | Flat or lower, sometimes with structure | The last round was overpriced | Anti-dilution triggers; morale; signalling |
| Venture debt | Term loan from a venture debt fund, with warrants | 13% to 18% interest, 5% to 20% warrant coverage | Just after equity; predictable revenue | Monthly repayments; covenants |
| Revenue-based financing | Capital repaid as a share of monthly revenue | 1.05x to 1.2x total repayment | Steady online revenue, marketing-led growth | Revenue share squeezes marketing budget |
| Working capital lines | Overdraft, receivable or inventory finance | 9% to 20% a year depending on type | Growth tied up in stock and receivables | Needs financial history and collateral |
Swipe the table sideways to see all columns.
Indicative terms as of Q3 2026. Venture debt ranges consistent with published Indian market guides (for example CFO Matrix, 2026).
The runway math investors do
Before they decide on the instrument, investors check whether a bridge can work at all.
How new investors read your bridge
The bridge itself is rarely the problem. What matters is who is in it.
- All major insiders participating pro rata or more: a strong signal. They know the business best and are adding money.
- Some insiders in, the lead out: new investors will ask the lead directly why. Prepare a good answer, such as fund life or reserve policy, and ask the lead to say it themselves.
- No insiders, only new angels: read as a rescue. It is survivable, but price and terms will reflect it.
Venture debt: cheap dilution, expensive cash
Venture debt looks attractive because it costs very little ownership. The cost shows up in cash flow.
| Item | Equity extension at last price | Venture debt |
|---|---|---|
| Dilution | 4 ÷ 54 = about 7.4% | Warrants: 10% coverage = ₹40 lakh of shares at ₹50 Cr, about 0.8% |
| Interest | None | 15% a year |
| Monthly cash out, months 1 to 6 (moratorium, interest only) | None | About ₹5 lakh |
| Monthly cash out, months 7 to 30 (principal and interest) | None | About ₹19.4 lakh |
| Total repaid | None | About ₹4.95 Cr plus fees |
| Covenants | Standard investor rights | Minimum cash, reporting, limits on more debt; breach can accelerate repayment |
Illustrative. Venture debt terms vary by lender and company; many include a 1% to 2% processing fee and sometimes an end-of-term fee.
In this example, venture debt adds about ₹19 lakh a month to burn from month seven. For a company burning ₹60 lakh, that is a 32% increase in cash outflow exactly when it should be preparing its next raise. That is why debt works best as a complement to equity, taken when the company has just raised, rather than as a substitute when it cannot.
When venture debt makes sense alongside a pre-Series A
- You closed an equity round in the last 3 to 6 months, and a reputable investor led it.
- Revenue is predictable, and the business can service the monthly repayment without cutting growth.
- The debt is 20% to 35% of the equity round, not more.
- The use is specific: stretching to a milestone with a clear buffer, funding a working capital build, or capital expenditure with a clear return.
- You have read the covenants and modelled a bad quarter against them.
More on funding stock and receivables with debt is in The Working Capital Trap.
Case study
The bridge that led somewhere
Consumer AI app, ₹45 lakh monthly revenue from subscriptions, 6 months of runway, raised a ₹6 Cr seed 16 months earlier
Situation
The team had moved from free users to paid subscriptions four months earlier. Monthly revenue was growing about 14% a month and 60-day paid retention was at 58%, but the numbers were too new for a Series A lead.
What was missed
The founders first asked insiders for "₹3 Cr to extend runway", with no milestone. The seed lead declined, citing reserves. An angel offered money on a note with a 30% discount and no cap.
What changed
They reframed the ask: ₹4.5 Cr to reach ₹1 Cr monthly revenue with 60-day retention above 55%, expected in 6 months, leaving 7 months to raise. They offered an extension at the seed price, not a note. With a specific milestone, the seed lead took ₹2 Cr pro rata plus, and two angels took the rest.
Outcome
The company hit ₹1 Cr monthly revenue in 7 months and started the Series A process with 8 months of cash. The Series A priced at 2.8x the seed post-money, with the bridge investors getting the full benefit and no conversion discount on the cap table.
The lesson
Insiders fund milestones, not months. A bridge with a specific, valuation-changing target is a different conversation from a request for more runway.
Illustrative case. Figures are representative of patterns in Indian rounds, not a specific company.
Related: CCPS, CCDs, Convertible Notes or iSAFE? and Pre-Series A in India: How Much to Raise. If you are weighing a bridge, an extension or debt in the next few months, talk to us.
Read next: government funding still open in 2026 and when to raise your next round.
Questions founders ask us
What is the difference between a bridge round and an extension?
An extension adds money to your last round at the same price and terms, usually from the same investors. A bridge is any interim financing before the next round, often on a convertible instrument with a discount. Extensions are cleaner for the cap table; bridges are more flexible.
Should I take venture debt before my Series A?
If you raised equity in the last 3 to 6 months, have predictable revenue and can service the repayments, venture debt of 20% to 35% of your last round can stretch runway efficiently. If you have little runway and no recent equity, debt adds repayment pressure at the worst moment.
What discount is normal on a convertible bridge in India?
10% to 25% to the next round's price, sometimes with a cap near the last round's post-money. Deeper discounts or no cap usually signal a weak negotiating position; model the conversion before you sign.
Does a bridge round signal trouble to new investors?
Not necessarily. A bridge led by insiders towards a specific milestone reads as confidence. A bridge from new angels with insiders absent reads as rescue. The signal is who participates and why.
How much venture debt can a startup raise in India?
Commonly 10% to 30% of the last equity round, or 30% to 50% of annualised revenue for revenue-generating companies, depending on the lender. Lenders look closely at the quality of the last round's lead investor.
About the author
Written by the Alphamark Ventures team, a fundraising advisory firm helping founders raise seed, angel and pre-Series A rounds, with a focus on consumer, consumer tech and consumer AI. Figures are as of the date shown and are for general information; this is not legal, tax or investment advice.
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