What's a Good Cash Runway? Benchmarks by Startup Stage

"How much runway should we have?" is one of the most common questions first-time founders ask. The answer depends on your stage, your fundraising plans, and the macro environment. This guide walks through realistic benchmarks for each stage and explains what "comfortable" looks like at each level.

Use free burn rate calculator to see where you currently stand against these benchmarks.

The Universal Rule: 12 to 18 Months

If you remember nothing else, remember this: maintain at least 12 to 18 months of runway at all times. This is the consensus across most VCs, accelerators, and seasoned founders.

The logic is straightforward. Fundraising takes 3 to 6 months from first email to wired check. You want a buffer of at least 6 months on top of that so you are not negotiating from weakness. 6 months for fundraising plus 6 months of buffer equals 12 months minimum. Add a safety margin for "things take longer than expected" and you land at 12 to 18.

If your current runway is below 12 months, you should already be planning your next raise. If it is below 6 months, you are in fundraising emergency mode whether you realize it or not.

Pre-Seed Benchmarks

Pre-seed startups are usually 1-3 people, building the first version of the product, with a few thousand to a few tens of thousands of dollars in monthly expenses. Funding usually comes from angels, friends and family, or accelerators, in amounts from $100K to $500K.

Metric	Typical Range
Monthly burn	$5K – $30K
Cash raised	$100K – $500K
Target runway	12 – 18 months
Goal during runway	Build MVP, get first 10 users, prove demand

At this stage, runway should be tight. Pre-seed money is meant to be enough to validate the idea and get to seed-stage metrics — not enough to coast. If you have 3 years of pre-seed runway, you probably either raised too much or are not investing enough in growth.

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Seed Benchmarks

Seed-stage startups have usually raised $1M to $4M. The team is 3-10 people, the product is in market, and the focus is on product-market fit and early growth metrics.

Metric	Typical Range
Monthly burn	$30K – $150K
Cash raised	$1M – $4M
Target runway	18 – 24 months
Goal during runway	Hit Series A metrics ($1M+ ARR, strong growth, retention)

Seed runway is usually longer than pre-seed because the metrics required for the next round (Series A) take longer to build. Investors expect to see at least $1M in annual recurring revenue, often more, plus growth and retention numbers.

Series A and Beyond

Series A startups have raised $5M to $20M. Burn rates are higher because the team is larger and growth investments are aggressive. The goal of the runway is to reach Series B metrics, usually $5M+ ARR with strong unit economics.

Stage	Typical Burn	Typical Runway	Goal
Series A	$100K – $400K/mo	18 – 24 months	$5M ARR, prove scalability
Series B	$300K – $1M/mo	18 – 24 months	$15M ARR, expand market
Series C+	$1M+/mo	18 – 24 months	Path to profitability or IPO

Notice that target runway stays at 18-24 months across all later stages. The dollar amounts get bigger, but the time-based buffer does not change much. Time, not money, is the constraint.

When 12 Months Is Not Enough

The 12-18 month rule has exceptions. In tight markets (like late 2022 through 2023), founders should aim for 24+ months because fundraising slows down. In capital-intensive industries (biotech, hardware, deep tech), 24-36 months is normal because milestones take longer. In bootstrapped or solo-founder businesses, runway can be much longer because burn is lower and the founder is also the source of income.

The rule of thumb is: longer runway is always better than shorter runway, but excessive runway can mask under-investment in growth. The right answer is "enough runway to comfortably reach your next milestone, plus a 6-month buffer."

Frequently Asked Questions

What if I have 24+ months of runway? Is that bad?

Not necessarily, but it might mean you are under-investing in growth. The point of fundraising is to put capital to work building a bigger business. If you raised $5M and are only spending $80K a month (5+ years of runway), investors will ask why. Either deploy faster or raise less.

Does runway include line of credit?

No. Runway is based on cash actually in the bank. A line of credit is debt you might take on later, not money you have now. Some investors will give you "credit" for an undrawn line, but as a founder, do not rely on it.

What about bootstrapped startups — does runway still apply?

Yes, but the math is different. For a bootstrapped startup, runway often equals "how long can the founder go without a paycheck plus how long can the business cover its costs from revenue." If you are profitable, runway is essentially infinite as long as conditions hold.