Why it matters
YC's 2018 post-money SAFE template solved one founder problem (uncapped pre-money dilution) by creating a worse one. With pre-money SAFEs, raising another SAFE didn't dilute earlier SAFE holders. With post-money SAFEs, each new SAFE comes out of founders' equity, not investors' — and the math compounds. Raise a $1M SAFE at $10M post-money cap (10%), then a $1.5M SAFE at $15M post-money cap (10%), then a $2M SAFE at $20M post-money cap (10%) — founders think they've sold 30%. They've actually sold 27% to SAFE holders, but the priced round comes in and the option pool shuffle eats another 8%, then the conversion math eats another 4%. Founders walk into the Series A meeting expecting 65% post-money and find themselves at 51%.
How to negotiate
Use a single post-money SAFE per cap, not multiple stacked at different valuations. Run the conversion math BEFORE signing each SAFE — most founders do not, because the founder-friendly framing of post-money SAFEs hides the cumulative dilution. If you must raise multiple SAFEs, push for 'most favored nation' (MFN) language so all SAFEs convert at the lowest cap, simplifying the math. Better still: do a priced seed round at $50K legal fees rather than pretending SAFEs are free.
Example language
How this clause typically appears in a debt agreement or note. Read it carefully — the language that triggers default is often buried in routine paragraphs.
This SAFE will convert into the Equity Financing at a price per share equal to the Post-Money Valuation Cap divided by the Company Capitalization, including all outstanding Safes (including this Safe), but excluding the Equity Financing.
TURNSHEET provides intelligence, not legal advice. This page describes typical market behaviour and common negotiation tactics; your specific facility may have nuances that change the analysis. Always review your debt documents — including covenants, intercreditor agreements, and personal guarantees — with qualified legal counsel before signing.