After SAFE converts
5.00%
pre-Series A
After Series A closes
3.65%
your final ownership
Paper value at this round
$0.51M
1.02× at the Series A price
Three snapshots of the cap table
100% = the whole company
Stage 1
Today
Stage 2
SAFE converts
Stage 3
Series A closes
Founders
Option pool
SAFE holder (you)
New Series A investor
i How conversion works
The lower price wins.
When your SAFE converts, you get shares at whichever effective price is lower: the cap price, or the discounted round price. Never both — even though you "have" both terms. Here's how today's inputs play out:
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What the "post-money" in post-money SAFE really means
The "post-money" doesn't mean after the Series A money. It means after all SAFEs convert but before the Series A new money. So your $0.5M ÷ $10M cap = 5% is your slice at that moment — and it gets diluted again when Series A comes in. YC's own primer confirms this; it is the most-misread term in startup finance.
ii The dilution journey
From a sheet of paper to a slice of a company.
Five steps. Watch how your percentage moves at each one.
iii What you make at exit
What you walk away with, at any exit price.
Drag the slider — all the way down to a fire-sale if you like. Numbers assume your SAFE has converted into a standard 1× non-participating preferred at Series A, and that all preferred ranks pari passu (equal seniority) — the usual outcome.
$100M
Your payout
$3.65M
3.65% × $100M, after pref check
Return multiple
7.3×
on your $0.5M
IRR (5-yr hold)
48.6%
if exit happens in ~5 years
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What "1× non-participating preferred" means for you
At a priced round your SAFE converts into a flavor of preferred stock. On exit, every preferred holder picks the better of two options: take 1× their money back as liquidation preference, or convert and take their share of common. The preference is a floor that only bites when the company sells for less than the stacked-up preferences — at good outcomes everyone just converts. This tool assumes all preferred ranks pari passu; real waterfalls sometimes stack seniority, which changes who gets paid first.
iv What can go wrong
What first-time angels typically miss.
The most expensive mistakes friends-and-family angels make rarely come from the cap or the discount. They come from these:
most important"A cap means I own that fraction."
No: the cap defines your conversion price ceiling, not your final ownership. Your $0.5M ÷ $10M cap = 5% is only your share at one specific moment — right after the SAFE converts and right before Series A money lands. The Series A money and the option pool top-up immediately dilute you further. Headline percentage is a peak; what matters is what's left after the next round.
terminology trap"Post-money means after the round."
In post-money SAFE, "post-money" means after all SAFEs convert — not after the priced round. Y Combinator's own primer states this explicitly. Every first-time investor reads it the other way around.
silent killer"What if there's no Series A — ever?"
SAFEs have no maturity date. If the company chugs along on revenue and never raises a priced round, your SAFE just sits there. No interest accrues, no automatic conversion happens, and you cannot demand your money back. The single biggest under-appreciated risk for friends-and-family investors.
cap-table cascade"More SAFEs just dilute the founder."
In a post-money SAFE, this is true on paper — and that's the problem. Founders who stack four or five SAFEs at different caps wake up at Series A having given away 30–40%. The Series A lead then demands they re-vest, and the SAFE round gets renegotiated. As a SAFE holder you can be on either side of that conversation.
below the cap"What if Series A prices below my cap?"
Then the cap is irrelevant. You convert at the Series A price, the same as the new lead investor (minus your discount, if you have one). The cap is a one-way ceiling, not a floor. It does not protect against down rounds — only against up rounds.
acquisition"What if the company is bought before any round?"
You take the greater of: (a) your money back (the "cash-out amount"), or (b) what you'd get if the SAFE converted at the cap. So a $0.5M SAFE at a $10M cap in a $20M acquisition pays you the conversion path: $0.5M ÷ $10M × $20M = $1.0M. A $5M fire-sale pays you the cash-out: $0.5M back.
no rights"I'm an investor, so I have voting and info rights."
SAFE holders have almost no rights until the SAFE converts. No board seat, no voting, no formal information rights, no pro-rata (unless a side letter says otherwise — and the default post-money SAFE does not include one). For friends-and-family checks under $250K, you should expect none of these.