SAFE caps and discounts

A SAFE does not set a price per share today. At conversion, two knobs decide how many shares the holder gets: a valuation cap and an optional discount. "Favorable" means lower price per share → more shares for the SAFE holder.

The big idea

A coupon that says "pay no more than $X, or 20% off whatever the store charges, whichever is cheaper" is the picture. The cap is the $X. The discount is the 20% off. The analogy breaks if there is no store price yet — before a priced round, the cap is the only number you can plan around.

Valuation cap

The cap is the maximum company valuation used to price the SAFE holder's conversion. If Series A prices above the cap, the holder converts as if the company were worth the cap — more shares per dollar than new-money investors. If the round prices below the cap, the SAFE typically converts at the round's price (they are not punished for investing early).

Discount

A discount (for example 20%) converts at a price per share equal to the qualified financing price × (1 − discount). Discounts show up alone, or alongside a cap ("better of cap or discount").

Uncapped SAFEs

An uncapped SAFE (discount-only, or sometimes a side-letter-only structure) has no valuation ceiling. Founders sometimes use them with very close angels. Investors usually prefer a cap; uncapped SAFEs can look like a bad deal if the next round is huge and there is only a modest discount.

When each knob binds

If the round's pre-money sits comfortably above your caps, caps bind and discounts rarely matter. If the round is flat or down relative to caps, SAFE holders may convert at the round price and own more than Investment / Cap.

A 20% discount on a $2.00 round is $1.60. A cap that already implied $0.80 still wins for the investor. Work the share counts in cap vs discount at conversion. Always read the signed form; YC's calculator encodes the standard post-money rules.

When negotiating, a lower cap is usually a bigger gift than a discount, because the cap can bind even if the next round is a large step-up. A discount-only (uncapped) SAFE is the opposite bet: it only helps if the round price exists and the off-the-round math beats any cap you declined to give.

Common mistakes

• Picking the higher price. "Better of" means better for the investor: the lower price.
• Ignoring an uncapped friend SAFE when the next round is huge.
• Assuming the cap always binds. A down or flat round can switch you to round pricing.

Check yourself

Round price $2.00, 20% discount, cap implying $0.80. What does the SAFE convert at?

$0.80 — the lower (better-for-investor) of $1.60 and $0.80.

When do discounts start to matter more than caps?

When the priced round is near or below the caps, so round-price × (1 − discount) beats the cap price.

Key takeaways

• Cap = ceiling valuation. Discount = off the round price. Investor takes the better (lower) price.
• Caps usually bind when the round is well above them.
• Uncapped SAFEs are a gift if the next round is huge.

Further learning

Next, MFN and side letters.