The Graduation Problem: What Share of Seed Companies Reach Series A
Roughly 15-20% of seed-funded companies raise a priced Series A within 24 months, according to Carta and PitchBook cohort data. The 2018 cohort managed about 30.6%. The 2022 cohort managed 15.4%.
The rate roughly halved in four years. This is what actually happened, and what it should change about how you plan a seed round.
Key takeaways
- Graduation within 24 months: roughly 15-20% for recent measurable cohorts, against about 30% for the 2018 cohort.
- The rate did not halve because founders got worse. The Series A bar rose while the definition of "seed" got looser.
- The median gap between primary rounds is about 774 days, over two years. An 18-month plan is a planning error.
- A seed round must buy proof, not time. Companies that graduate closed a specific evidence gap.
- The bottom of the funnel is not failure. Most non-graduating companies are acquired, bridged, or become profitable small businesses.
The numbers
| Cohort | Graduated to Series A within 24 months |
|---|---|
| 2018 | ~30.6% |
| 2022 | ~15.4% |
| Recent cohorts (early estimate) | ~15-20% |
Early one-year data for more recent cohorts suggests the very front of the funnel may be recovering even as the two-year rate stays depressed. If that holds, the companies who are going to graduate are doing it faster, and the long tail is not graduating at all.
Why it halved
Four things happened at once, and only one of them is about company quality.
1. The Series A bar moved. The revenue, growth and efficiency thresholds for a priced Series A rose materially after 2021 and did not come back down. A company that would have cleared the bar in 2019 does not clear it now.
2. "Seed" got looser. Seed round sizes grew and the label stretched to cover what used to be two distinct stages. More companies are counted in the seed cohort denominator. The number graduating did not grow proportionally, so the ratio fell arithmetically before any behaviour changed.
3. The gap stretched. With a median inter-round gap over two years, a 24-month measurement window now cuts through the middle of the distribution rather than sitting comfortably past it. Some of the decline is a measurement-window artefact.
4. Capital concentrated. Series A capital flowed heavily to a small number of categories. Outside those categories the effective bar rose again, regardless of absolute performance.
Our read: a meaningful part of the decline is structural and definitional, and the rest is a genuine rise in selectivity. Both parts mean the same thing for planning.
What this changes about the seed round
Raise for 24 months, not 18
The most common and most expensive planning error in early-stage fundraising.
With a median inter-round gap over two years, an 18-month plan puts you back in market at month 12 to 14, with four to six months of cash, having not yet reached the metrics that would justify the round. You then raise from a position of visible weakness, which is the most expensive capital available.
24 months of runway, with the raise starting at month 12 to 15 while nine to twelve months of cash remain, is the shape that matches the data.
Solve for the evidence threshold, not the runway
The companies that graduate did not simply survive longer. They closed a specific evidence gap that the Series A decision depends on.
Before you raise a seed round, write down the answer to: what will be demonstrably true in 20 months that is not true now, and why does that make a Series A a reasonable decision for someone?
If the answer is "we will have more revenue", that is not a threshold, it is a direction. The threshold is specific: a repeatable acquisition channel with known CAC, a retention curve that flattens, a second customer segment proven, gross margin above a stated level.
Then make sure the use of funds actually buys that. A surprising number of seed plans fund general operations for 24 months and arrive at month 20 with more revenue, the same unanswered question, and no round.
The 80% is not all failure
This is worth stating because the statistic gets used as a doom number.
Companies that do not raise a Series A within 24 months variously: raise a seed extension or bridge, get acquired, reach profitability at a scale that does not need venture capital, raise later than 24 months, or wind down. Only the last is failure.
The venture path is one outcome, not the only one. A company that reaches $2M of profitable ARR and never raises again has not failed at anything except a specific financing route.
What it means for investors
If you are writing seed cheques, roughly one in five of your portfolio will be marked up by a priced Series A within two years. Most of your portfolio will be, for a long time, unmarked and illiquid.
Two consequences:
Reserve strategy matters more than entry price. The ability to support a company through a longer gap is worth more than a better entry valuation on a company you cannot follow.
Your own evidence bar at entry should match the Series A bar you are underwriting toward. Funding a company whose plan does not close a Series A evidence gap is funding a bridge to another bridge. Screening for this is part of the four-dimension read - specifically the deal dimension, where the use of funds either buys a milestone or does not.
Method and sources
Graduation rates and inter-round gaps as published by Carta; cohort comparisons and Series A conversion figures cross-referenced with PitchBook cohort data. Rates are measured within a fixed 24-month window from seed close, which understates cohorts whose median gap exceeds that window. Figures as of September 2026; re-verify before citing. The recent-cohort range is an early estimate, because cohorts after 2022 have not yet completed a full 24-month window.
Frequently Asked Questions
Roughly 15-20% within 24 months for recent cohorts (an early estimate), against about 30% for the 2018 cohort.
A combination of a higher Series A bar, a looser definition of "seed" inflating the denominator, a longer median gap between rounds cutting through the measurement window, and capital concentration into a narrow set of categories.
The median gap between primary rounds runs to about 774 days, a little over two years.
24 months, with the next raise starting around month 12 to 15, while nine to twelve months of cash remain.
Extensions and bridges, acquisitions, reaching profitability without further venture capital, raising later than the 24-month window, or winding down. Only the last is failure.
Read next
The State of Early-Stage Capital 2026
Pre-Seed and Seed Benchmarks 2026: Round Sizes, Valuations, Dilution
How Long a Seed Round Actually Takes
The Fundraising Readiness Score: How Investors Rate You Before the First CallRaiseTalks keeps the milestones your round is buying next to the evidence that proves them, so the Series A conversation starts from a record rather than a reconstruction. Start your 30-day trial.