What Is the YC SAFE? The $500K Standard Deal Explained

A SAFE is a contract that gives an investor the right to equity in your company at a future financing event. It is not debt. It does not accrue interest. It does not have a maturity date. It simply sits on your cap table until you raise a priced round, get acquired, or wind down.

YC created the SAFE in 2013 to replace convertible notes for early-stage rounds. The instrument is now used by nearly every accelerator, angel network, and pre-seed fund globally.

| Component | Amount | Type | Terms |

| --- | --- | --- | --- |

| Tranche 1 | $125,000 | Post-money SAFE | 7% of post-money equity |

| Tranche 2 | $375,000 | Uncapped MFN SAFE | Converts at next priced round terms |

| Total | $500,000 | — | No board seat, no interest |

The $125K SAFE is what gives YC their stake. At a $125K investment for 7%, the implied post-money valuation is roughly $1.79M. This is the same for every company in the batch — there is no negotiation on this tranche.

The $375K is the more interesting piece. It converts at whatever cap (or discount) your next priced-round investor sets. If your Series A is at $20M post-money, YC's $375K converts at $20M — they get whatever percentage that buys.

Two founders splitting a company 50/50 before YC own 50% each. After accepting the YC deal:

• YC owns 7% from the $125K SAFE

• A standard 10% option pool is created

• Founders are diluted from 50% each to roughly 41.5% each

When the $375K converts at the next round, dilution depends entirely on that round's valuation. At a $20M post-money Series A, the $375K converts to roughly 1.9% — so total YC ownership after Series A is around 8.9% before further dilution from new investors.

YC switched from pre-money to post-money SAFEs in 2018. The difference is critical: in a post-money SAFE, the investor's ownership percentage is fixed at conversion, regardless of how many other SAFEs convert at the same time.

With pre-money SAFEs, when multiple SAFEs converted at once, founder dilution was unpredictable and often larger than expected. Post-money SAFEs make dilution mathematically clean — what you see is what you get.

MISCONCEPTION: YC takes 7% for the full $500K. Reality: YC takes 7% for $125K. The other $375K is uncapped and converts later.

MISCONCEPTION: SAFEs accrue interest like loans. Reality: SAFEs are not debt. There is no interest, no repayment obligation.

MISCONCEPTION: YC gets a board seat. Reality: SAFEs do not include board rights. YC's involvement is through office hours, group sessions, and Demo Day.