SAFEs

A SAFE (Simple Agreement for Future Equity) is a short contract: the investor wires cash today and receives the right to stock later, usually when you close a priced round. It is not stock today, and it is not a loan. That distinction is what keeps you honest about dilution.

Early fundraising used to mean a slow priced round or a convertible note (debt with interest and a maturity date). As of the mid-2020s, SAFEs dominate US pre-seed and seed checks on platforms like Carta. Notes still appear in bridges and some non-US markets.

Then run the share counts in SAFE conversion math.

SAFE vs note vs priced

Because there is no maturity, SAFEs do not create a repayment cliff at 18–24 months. Holders wait for a conversion event — usually your next serious priced round.

Liquidity, the cap table, and process

If the company is acquired or shuts down while SAFEs are outstanding, the form specifies payment priority (often related to the purchase amount, sometimes with a choice versus converting into common). Read the form you signed. Do not assume SAFE holders "walk away with nothing" or "take everything."

Until conversion, SAFE holders usually appear as convertible balances, not as share percentages — but any honest model shows as-converted ownership. Quoting "founders own 90%" to a candidate while $3M of SAFEs sit ready to convert into ~25% is how offer-letter trust dies.

When raising: pick a target ownership band before the first signature; use one form version (YC post-money); ledger every wire the day it lands (amount, cap, discount, MFN, side letters); get board consent; use the corporate entity's bank account. Stop when you hit the band, even if more angels want yesterday's cap.

Angels, syndicates and accelerators (including the YC deal) almost always document economic terms as SAFEs plus any pro-rata side letters.

Common mistakes

• Treating a SAFE as stock you already issued. It is a right to future shares.
• Signing the next SAFE without summing the stack. Later post-money SAFEs come out of the founders.
• Losing side letters. Pro-rata at Series A is a real allocation constraint.

Key takeaways

• A SAFE is a right to future equity — not debt, not priced stock today.
• Prefer post-money forms so ownership at the cap is readable.
• Sum SAFE percentages before you pitch employees or Series A on founder ownership.
• Convert the stack with real share counts on the next page.

Further learning

YC SAFE documentsThe SAFE is the free, standardized agreement startups use to raise early money. Learn the instrument — forms, valuation caps, conversion — and how it works.Y Combinator YC — A Guide to Seed FundraisingFundraising and Equity: The most comprehensive guide on why, when, and how to raise money for your startup.YC Startup Library YC — SAFE vs convertible note vs priced roundHow YC's SAFE compares to convertible notes and priced rounds — interest, maturity, valuation, legal cost, and ownership clarity, and when to use each.Y Combinator YC SAFE conversion calculatorFree SAFE conversion and dilution calculator from Y Combinator. Model valuation caps, discounts, MFN, stacked SAFEs, option pools, and Series A conversion.Y Combinator

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