Back to Hub

Y-Combinator Post-Money SAFE Dilution Crunch.

Calculate the mathematical whiplash founders experience when unpriced Post-Money SAFE notes convert during a Series A resulting in unexpected catastrophic equity dilution.

## The 'Post-Money' SAFE Trap

Y-Combinator introduced the 'Post-Money SAFE' to make seed funding simple. However, it shifts 100% of the dilution risk onto the founders. When you stack multiple SAFEs at different caps, founders often don't realize they have already sold 35% of their company before the Series A even begins.

### FAQ

**Q: Why do founders get shocked at the Series A?**
A: Under the old Pre-Money SAFE, everyone got diluted together. Under a Post-Money SAFE, the seed investor's ownership is mathematically locked. If they bought 15% on a $10M cap, they own exactly 15% the moment immediately preceeding the Series A. When the Series A VC demands 20%, and demands a 10% Option Pool for employees... who pays for that 30%? The founders. The SAFE investors do not dilute to pay for the option pool; it comes entirely out of the founder's hide.