A cap can make early dilution more visible.
For a cap-based post-money SAFE, purchase amount divided by the post-money cap estimates the ownership sold before new money in the converting round. This is a useful planning relationship when the cap governs conversion.
The next financing still dilutes that stake. Conversion below or near the cap, contractual capitalization adjustments and other terms can cause actual ownership to differ. The cap estimate is not a promise of a fixed final percentage.
The formula, made clear.
- After the round
- Pre-round SAFE ownership × (1 − new investor ownership).
- Cap-based estimate
- Applies when the cap governs, using a simplified single-SAFE capitalization.
Put the numbers in context.
A $500,000.00 SAFE at a $5M post-money cap implies 10% before the priced round. A round selling 20% to new investors reduces this to 8%.
| Input | Example value |
|---|---|
| SAFE investment | $500,000.00 |
| Post-money valuation cap | $5,000,000.00 |
| New round dilution | 20% |
| SAFE ownership after new money | 8% |
What this calculation assumes
One cap-only post-money SAFE, cap governs conversion, and no pool increase. Below-cap financing or document-specific provisions can produce a different outcome.
What to consider next.
Review the financing price against the cap and include every SAFE when preparing the actual cap table.
How we approach financial models →