# Is it easier to raise a Series C than a Series B?

At first, then no. 35.5% of Series B companies ever reach a C, five points better than A→B — survivorship is real. But B→C odds decay faster and cross below A→B at month 42. A stalled Series B is a harder problem than a stalled Series A, because the burn base and the valuation to clear are both far larger.

The C hazard peaks in the same quarter — month 21 — but at 5.5% against 3.7%, a spike half again as tall and half again as narrow. Above $45M the B round is penalised: graduation falls to 24.6%. A big B buys a harder exam, not more time. And 63% of those who never raise a C never file again.

## Sources

- **Measurement** — [The Series C Clock](https://www.leanscale.team/knowledge/research/series-c-clock/)
- **Measurement** — [The Series B Clock](https://www.leanscale.team/knowledge/research/series-b-clock/)

---
Cluster: Fundraise · https://www.leanscale.team/knowledge/answers/series-b-to-series-c-odds/