Indian entrepreneur assessing financial documents in a bright workspace, reflecting on startup runway calculations.

How to Calculate Your Startup’s Runway (Gross Burn, Net Burn and Default Alive)

4 min read

Your startup’s runway isn’t just a number, it’s your lifeline. Yet, too many Indian founders misunderstand this crucial metric. It’s not about how much you’ve raised but how long you can survive before you need more cash. Runway is the time you’ve got before the money dries up. Calculating it correctly can mean the difference between scaling up and shutting down. Let’s cut through the fluff and get to the brass tacks: how to calculate your startup’s runway using gross burn, net burn, and whether you are ‘default alive’.

Understanding Burn Rate: Gross vs. Net

Most founders get their burn rates wrong, and it’s no wonder why they end up in a cash crunch. Burn rate is not just about spending; it’s about the rate at which your cash reserves are dwindling. You need to track both gross and net burn rates.

Gross Burn Rate

This is the sum total of all your monthly expenses. Think of it as the full picture of your monthly cash outflow. Salaries, rent, marketing, tech infrastructure, everything counts. If you’re spending ₹10 lakh a month, that’s your gross burn rate.

Net Burn Rate

Net burn rate is the gross burn minus any revenue you bring in during the same period. If your gross burn is ₹10 lakh but you make ₹4 lakh in revenue, your net burn is ₹6 lakh. The lower your net burn, the longer your runway, simple as that.

Calculating Your Runway

Here’s the harsh reality: if your runway is under 9 months, you should already be fundraising. Under 6 months, you’re in dangerous territory. Under 3 months, you’re a walking dead startup.

Runway Formula

Runway is calculated as:

Runway (months) = Cash in Bank ÷ Net Monthly Burn

But this formula oversimplifies reality. Real runway considers future cash inflows and immediate payables, not just your current bank balance. Here’s a more accurate version:

Real Runway = (Cash + Committed Inflows − Immediate Payables) ÷ Projected Net Burn

Are You Default Alive?

Paul Graham of Y Combinator coined the term ‘default alive’, but let’s bring it home to an Indian context. Default alive means you can eventually become profitable with the cash you have, without needing to raise more money.

If your revenue is on track to cover future expenses, you are default alive. If not, you’re default dead, and no amount of optimism will change that.

How to Determine Default Alive Status

  • Revenue Growth: Is your revenue growing month-over-month?
  • Expense Control: Can you cut costs to extend your runway?
  • Break-even Point: Do you know when you’ll hit it based on current growth rates?

If these answers skew negative, it’s time to rethink your strategy.

Bottom Line

Your startup’s runway is the countdown to your next big decision. You can’t afford to get complacent. Calculate it right, manage your burn rates, and always aim to be default alive. A longer runway doesn’t just mean survival; it means leverage in negotiations and a better shot at success.

FAQs

What is a healthy runway for an Indian startup?

A healthy runway is typically 12-18 months. This gives you enough time to hit key milestones and raise your next round without panic.

Why should I track both gross and net burn rates?

Gross burn gives you a clear picture of your full expense load, while net burn shows how fast you’re actually burning through cash after revenue. Both are crucial for planning.

How do I know if I’m ‘default alive’?

If your projected revenue growth can cover future expenses without additional funding, you’re default alive. If not, you need to either boost revenue or cut costs.

Is it okay to have a high burn rate if I’m growing fast?

Not necessarily. A high burn rate can be justified if growth is sustainable and leads to profitability. But in most cases, reckless spending without clear ROI is a red flag.

For more insights on managing your startup’s finances, consider reaching out to us at Malpani Ventures. We’re more than investors; we’re mentors for your startup journey. Learn why ignoring your burn rate is a recipe for disaster.

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