How Much Does Y Combinator Invest? The $500K Deal Explained

Every YC company gets the same deal, no negotiation:

• $125,000 for 7% equity on a post-money SAFE → implied post-money valuation of ~$1,785,714.

• $375,000 on an uncapped MFN (Most Favored Nation) SAFE → converts at the lowest valuation cap your next priced round investors get.

Total cash: $500,000. Total guaranteed dilution at the application stage: 7%. Additional dilution from the MFN SAFE depends entirely on your next round.

The $375K MFN sits on your cap table with no valuation. When you raise your next priced round, YC's MFN automatically takes the most-favorable cap any other investor receives. If your next round is at $20M post-money cap, YC's MFN converts as if it had a $20M cap too.

Practical effect: YC participates in your next round on the best available terms without re-negotiating.

From YC alone: 7% guaranteed at the post-money SAFE conversion.

From a typical seed round on top ($3M at $12M post-money): ~25% additional dilution from new investors + ~3.1% from the MFN converting at $12M → total post-seed dilution to YC ends up around 10%.

Most founders end up at ~10–12% diluted to YC after one priced round. This is the highest accelerator dilution on the market, but the lowest cost-of-capital relative to brand and network access.

Before January 2022, YC's deal was $125K for 7%. The 2022 update added the $375K MFN SAFE — tripling the cash without changing the headline equity. It was YC's response to seed-round inflation: founders increasingly needed more runway before raising a priced round.

You can't. The terms are non-negotiable. The one exception: if you've already raised a priced round at a meaningfully higher valuation before accepting YC, the MFN component may convert at that valuation.