What A SAFE Actually Does To Your Cap Table

A SAFE — a simple agreement for future equity — lets a startup take money now and issue shares later, when a priced round sets a valuation. It removes the need to agree a valuation at the earliest and least knowable stage, which is genuinely useful.

The cost of that deferral is that the dilution is invisible until it arrives.

Caps and discounts

Most SAFEs carry a valuation cap, a discount, or both. The cap sets a maximum valuation at which the investor's money converts, so an investor who backed you early converts at a better price than the new money if the round prices above it.

A discount converts the investment at a percentage below the round price. Where both apply, the investor generally gets whichever is more favorable to them.

Pre-money and post-money

The distinction that catches founders is whether a SAFE is pre-money or post-money. Under the post-money form, the investor's percentage is fixed relative to the company after all SAFEs convert — so every additional SAFE you issue dilutes the founders rather than the earlier SAFE holders.

Founders who raise on a series of post-money SAFEs across a long pre-seed period frequently find they have given away substantially more than they believed. The math is not hidden; it is simply not done until the priced round forces it.

Model it before signing

Before agreeing any SAFE, build the conversion at two or three plausible priced-round valuations and look at the resulting founder ownership. This takes an hour with a spreadsheet or a lawyer, and it is the single most valuable hour in an early raise.

The stack

Multiple SAFEs at different caps convert simultaneously at different prices. Keep an accurate, current schedule of every instrument, its cap, its discount and its form. Reconstructing this from email during diligence is a well-known way to delay a round.