How to Read a SAFE Before It Converts: The Cap Table Math That Decides Your Dilution
A SAFE is a promise to convert, and the cap or discount is the price that decides how much ownership the investor gets.
The trap is simple: a SAFE looks like a quick way to take money, but it is really a promise to give up ownership later.
The trap: a SAFE is not a valuation
The two numbers that matter are the cap and the discount. A SAFE is a simple promise to convert into equity at the next priced round. It is not a loan in the ordinary sense, and it is not a valuation by itself. It is a safe note that says: when the company raises a priced round, this investment becomes shares.
The trap is that founders often think of a SAFE as just the amount of money coming in. Investors think of it as the amount of money going out. Neither side is thinking about the conversion price. That price is what turns dollars into shares, and shares into ownership. If you do not know which one will control conversion, you are signing a future ownership change without reading the price tag.
If you are a founder, the question is not only how much you can raise. The question is how much of the company the investor will own after conversion. If you are an investor, the question is not only what you are paying today. The question is what price this startup investment will use when it converts.
The rule: pick the investor's better price
Here is the conversion rule. If a SAFE has a cap, convert at the lower of the cap price or the next round price. If a SAFE has a discount, convert at the discounted next round price. If a SAFE has both, use whichever gives the investor the lower price.
Then the math is plain: shares equal investment divided by conversion price. Add those shares to the cap table. That is the ownership change.
How to read it before conversion
Before you sign or receive a SAFE, run through this checklist. It is not legal advice, but it is the cap table math you should understand.
- Find the cap. If there is no cap, the SAFE is not using a ceiling price.
- Find the discount. If there is no discount, the SAFE is not using a percentage off the next round price.
- Ask what the next priced round might look like. You do not need a perfect forecast. You need a range of possible prices.
- Compare the cap price with the next round price. If the cap is lower, the cap controls.
- If there is a discount, calculate the discounted next round price. If that price is lower than the cap price, the discount controls.
- Divide the investment by the controlling price. The result is the number of shares the investor receives.
- Add those shares to the cap table. That is the dilution.
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The whiteboard sequence
Identify the terms: the cap is a ceiling on the price the investor pays, and the discount is a percentage off the next round price. Choose the lower price: the cap can matter more when the next round price is high, the discount can matter more when the next round price is low, and when both exist, the investor gets the better of the two outcomes. The easiest mistake is to compare the SAFE to the current valuation, because the current valuation is not the conversion price; the next priced round is the event that triggers conversion, and the cap or discount is the price rule applied at that event. Another mistake is to assume the investor will always get the cap, because that is true only when the cap gives the investor a lower price than the next round; if the next round price is below the cap, the next round price controls. Another mistake is to assume the investor will always get the discount, because that is true only when the discount gives the investor a lower price than the cap; if the cap is lower, the cap controls. Divide the investment by the controlling price. Add those shares to the cap table. Then return to the same rule: a SAFE converts at the next priced round, and the cap or discount is the price rule applied at that event.
For a founder, the practical move is to model the worst reasonable case. Ask what happens if the next round is lower than you hoped. Ask what happens if the cap is the controlling price. Ask what happens if the discount is the controlling price. The answer is not one outcome. It is a range of ownership outcomes.
For an investor, the practical move is to ask for the same range. Do not just ask for the cap. Ask how the SAFE converts if the next round is high, low, or somewhere in between. Ask what the investor would own after conversion under each case.
What to do next
Keep the rule short enough to write on a whiteboard. Before you sign, put the same question in front of the founder and the investor: what price will this SAFE use, and how many shares will that price create? If the answer is not clear, the SAFE is not ready to sign. If the answer is clear, you can see the dilution before it happens.
The cap table is not a surprise. It is a record of the promises you made. Read the SAFE like a promise, not like a receipt. The money is the easy part. The conversion price is the part that decides ownership.
