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Pre-Money vs Post-Money SAFEs, Explained

July 29, 2026

Originally sent to Play Money subscribers · July 2026

Part of our ongoing Tuesday series on how angel investing deal mechanics actually work — SAFEs, valuation caps, discounts, and the fine print behind every check.

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💎 A reader hit reply on last week's newsletter asking me to break down pre-money vs post-money SAFEs, and when the discount matters.

I am getting over a very bad case of post-FIFA 🏆⚽ post-TdF 🟡🚴 blues, so angel mechanics is the perfect distraction.

A SAFE isn't one instrument. It's the same paperwork playing a different role depending on where in the funding cycle it shows up - and the terms used adjust accordingly.

-- C2K

Quick refresher

A SAFE (Simple Agreement for Future Equity) is not a loan and not equity yet. You send money. It converts to equity at the next priced round, at terms set by a valuation cap, a discount to the next priced round's price, or both. read more here

Post-money valuation cap: the cap is the company's value regardless of how much money goes in, so your ownership is simply investment ÷ cap.

Pre-money valuation cap: the cap is the company's value before your money goes in, so your dollars buy a slice of a company that's worth cap + investment.

Math Break: A company raises $2M on a SAFE w/a $10M cap.

• Post-money cap buys 20% of the company

• Pre money cap buys 16.7%

Discount: you convert at a set percentage off the price per share the new investors pay (aka: pre-money valuation) in the priced round (20% discount = you pay 80 cents for their dollar).

Lower-of at conversion. When a SAFE has both a cap and a discount off the priced round, you get whichever is lower. They do not stack (aka: you don't get a discount off of the valuation cap, nice try!)

Play around with it in our SAFE Simulator.

Here's how it all shows up in action

Post Money SAFEs

Mostly used: Early round where no prior priced round has happened.

Valuation cap set by the founders or an early stage fund based on gut and comps so mney flows in without friciont.
No discount because the math is messy and most SAFEs are priced so the discoutn dont' matter.

🌶️ Fun fact: Post money SAFEs are investor friendly. Your max conversion price is set by that fixed valuation cap. Additional SAFEs dilute the founder not you. Founder's are ok with this because dilution is much easier to track with post-money terms. It's a bit of a lazy tax.

Pre Money SAFEs w/a discount

Mostly used: A bridge or extension round after a priced round.

Pre-money is smarter because a valuation anchor exists from the past priced round. Because the cap could be closer to the future round price, the discount ensures upside for acting early.

🌶️ Exceptions: You will sometimes see a pre-money SAFE used at the seed stage. Pre vs Post in this case is probably a founder preference. Either the founder is new to fund raising and grabbed an old document or is a sophisticated fund raiser and wants to carefully mange dilution.

Uncapped is back, and YC is why

Uncapped SAFEs used to only be used with early friends and family rounds, but they are popping up again because of YC, the buzzy SF accelerator.

YC's new standard terms are no cap, no discount, but MFN.

Uncapped means the SAFE has no valuation ceiling. Will you investment convert at a $10M valuation or a $100M valuation? Who knows!

Yes, if your draw is dropped, you are not alone.

MFN (Most Favored Nation) is a separate clause that lets you swap your terms for better ones if a later SAFE investor negotiates them.

As an angel, I want a clear agreement as to how I am getting rewarded for investing early. Uncapped notes don't provide that. MFN only tempers the blow a bit. Most investors feel the same way (only 9% of SAFEs are uncapped.)

If you see one, take a beat. IMO they are hard to justify.

SAFE Cheat Sheet

The question with SAFE's is: How am I compensated for investing early? A low valuation cap? An appropriate discount off of the next round? Both?

Match the instrument to the stage.
Pre-seed or seed: post-money, defensible cap. no discount.
Bridge or extension off a priced round: pre-money with a discount.
Uncapped: only with MFN, only when you truly trust the founder.

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Frequently asked questions

A SAFE (Simple Agreement for Future Equity) is a contract that lets an investor put money into a startup today in exchange for equity later, usually when the company raises a priced round. It isn't a loan (no interest, no maturity date) and it isn't equity yet. Instead, it converts into shares once a triggering event happens, most commonly the next priced financing. The terms of that eventual conversion are set upfront through a valuation cap, a discount, or both. Because there's no valuation negotiation at signing, SAFEs let founders raise quickly and cheaply, and let investors get in early before the company's price is fully set. The specific cap, discount, and structure used depend heavily on what stage the company is at and whether a priced round has already happened.

The difference comes down to what the valuation cap actually represents. In a post-money SAFE, the cap is the company's value regardless of how much additional money comes in, so an investor's ownership is simply their investment divided by the cap — clean and easy to calculate. In a pre-money SAFE, the cap represents the company's value before the investor's money is added, so the investor's dollars buy a slice of a company worth the cap plus the investment. Post-money SAFEs are more common in early rounds with no prior priced round, since the math is simpler and more investor-friendly. Pre-money SAFEs show up more often in bridge or extension rounds after a priced round already exists, where a valuation anchor makes pre-money terms make more sense.

A discount lets a SAFE investor convert into equity at a percentage off the price per share that new investors pay in the next priced round. For example, a 20% discount means the SAFE holder effectively pays 80 cents for every dollar the priced-round investors pay. The discount rewards early investors for taking on risk before the company's valuation was fully proven out. It typically matters most in pre-money SAFEs used in bridge rounds, where there's already a priced-round valuation to discount against. In post-money SAFEs, a discount is less common because the fixed valuation cap already does the work of protecting early investors.

When a SAFE includes both a cap and a discount, the investor doesn't get both benefits stacked together. At conversion, the calculation runs both ways — once using the cap, once using the discount off the priced round's price — and the investor converts at whichever produces the lower effective price per share (meaning more shares for the same investment). This "lower-of" mechanic is standard in SAFE agreements and exists specifically to prevent double-dipping. It means the cap and discount function as two different backstops protecting the investor, not two separate discounts that combine.

An uncapped SAFE has no valuation ceiling, meaning there's no fixed price at which it will convert to equity — it could convert at a $10M valuation or a $100M valuation, depending on where the next priced round lands. Uncapped SAFEs used to be reserved for very early friends-and-family checks, but they're becoming more common again partly because of YC's newer standard terms, which pair no cap and no discount with an MFN (Most Favored Nation) clause instead. MFN lets an investor swap into better terms if a later SAFE investor negotiates a more favorable deal. Even so, MFN only partially offsets the lack of a cap or discount, which is why only a small share of SAFEs (roughly 9%) go uncapped, and why most experienced angels are hesitant to sign one without a clear reason.