A SAFE note (Simple Agreement for Future Equity) is a contract in which an investor pays money now for the right to receive shares later, usually when the company raises a priced equity round. Despite the “note” nickname, a SAFE is not debt: it has no interest rate and no maturity date. Most SAFEs today use Y Combinator’s post-money form, which converts based on a valuation cap, a discount or both.
When SAFEs first appeared in 2013, many angel investors were skeptical and convertible notes were the norm. Today, SAFEs are among the most common instruments for pre-seed and seed financing. They are simple to sign but not simple in effect: a few SAFEs on different terms can change your cap table in ways founders don’t expect.
What a SAFE Is (and Isn’t)
A SAFE is a contractual right to future equity. It is sometimes described as a warrant, a futures contract or a loan, but it is none of these:
- Not debt: there is no interest, no maturity date and no ordinary repayment obligation.
- Not stock yet: SAFE holders are not stockholders until conversion, so they don’t vote and, by default, have no board seat, information rights or other stockholder rights.
- Still a security: SAFEs must comply with federal and state securities laws.
Because SAFE holders are neither stockholders nor ordinary creditors before conversion, their protections come almost entirely from the contract itself. That is a reason for founders to use standard terms, and for investors to understand what they are giving up.
The YC Post-Money SAFE Forms
Y Combinator publishes standard post-money SAFE forms that much of the market uses with few or no changes. The main variations are:
- Valuation cap, no discount, the most familiar version;
- Discount, no valuation cap;
- Valuation cap and discount, where the investor converts at whichever price yields more shares; and
- MFN, no cap and no discount, which lets the investor adopt better terms the company later gives other SAFE investors.
YC also offers a separate pro rata side letter, giving an investor the right to buy into the next priced round to maintain its ownership. Pro rata rights can crowd out new investors, so grant them deliberately; see our post on why startups should grant pro rata rights sparingly.
How Conversion Works: A Worked Example
A post-money SAFE converts when the company closes an “Equity Financing,” a bona fide round in which it sells preferred stock at a fixed valuation. The SAFE typically converts into a series of preferred stock with the same terms as the new round, adjusted for the SAFE’s lower price.
Example: An investor buys a $500,000 SAFE with a $10,000,000 post-money valuation cap. At conversion, the investor’s ownership is $500,000 ÷ $10,000,000, or 5% of the company’s capitalization immediately before the priced round, which includes all converting SAFEs and notes and the existing option pool. If new investors then buy 20% of the company in the priced round, the SAFE holder’s 5% becomes 4% after the round (5% × 80%), ignoring any option pool changes.
If the SAFE also has a discount, the investor converts at the lower of the cap price and the discounted round price, which produces more shares.
Stacking SAFEs
Post-money SAFEs make each investor’s percentage predictable, but every new SAFE dilutes founders and other existing holders rather than earlier SAFE holders. Consider a company that raises:
- $500,000 at a $5,000,000 post-money cap (10%);
- $1,000,000 at an $8,000,000 cap (12.5%); and
- $1,500,000 at a $12,000,000 cap (12.5%).
Before a single priced-round dollar comes in, SAFE holders own 35% of the company. Add the priced round and an option pool increase, and the founders’ stake can fall faster than expected. Keep a pro forma cap table that models conversion of every outstanding SAFE under different round sizes and valuations.
Acquisitions, IPOs and Shutdowns
- Liquidity event before conversion (such as an acquisition or IPO): the post-money SAFE holder generally receives the greater of its purchase amount or the amount it would receive if the SAFE converted to common stock at the cap.
- Dissolution: the holder is generally entitled to its purchase amount after creditors and ahead of common stockholders, to the extent assets remain.
If a company never raises a priced round and never exits, the SAFE may simply remain outstanding. That open-ended risk is one reason some investors negotiate additional terms.
Securities Compliance
SAFEs are securities. Most startups issue them to accredited investors under Rule 506(b) of Regulation D, file a Form D with the SEC within 15 days after the first sale and make any required state notice filings, including in California. Selling to non-accredited investors or advertising the raise publicly raises additional requirements that should be addressed before the first offer.
Common Founder Pitfalls
- Over-raising on SAFEs at several caps without tracking cumulative dilution;
- Inconsistent side letters (MFN, pro rata or information rights) that complicate the priced round;
- Editing the YC form in ways that create ambiguity or surprise future investors;
- Skipping securities filings or selling to non-accredited investors without proper analysis; and
- Assuming tax outcomes, such as when the QSBS holding period begins, which remains unsettled for SAFEs.
When a SAFE Is the Right Tool
SAFEs work well for early rounds where speed matters, investors know the YC forms and the company expects to raise a priced round within a reasonable time. A convertible note may be better when investors require creditor protections, and a priced round may make sense once the raise is large enough to justify the cost. For a side-by-side comparison, see convertible notes vs. SAFE notes.
Frequently Asked Questions
Is a SAFE note debt?
No. A SAFE has no interest, no maturity date and no ordinary repayment obligation. Despite the common “SAFE note” nickname, it is a contractual right to receive equity in the future.
Does a SAFE have a maturity date?
No. A standard YC SAFE stays outstanding until it converts in an equity financing, pays out in a liquidity event or terminates on dissolution or another event specified in the form.
What is the difference between a pre-money and a post-money SAFE?
A pre-money SAFE measures the cap before the SAFE money, so SAFE holders dilute each other and ownership is harder to predict. A post-money SAFE measures the cap after all SAFE money, which fixes each investor’s percentage but shifts dilution from additional SAFEs to founders and existing holders.
Do SAFE investors get board seats or information rights?
Not under the standard YC forms. Rights such as pro rata participation or information rights must be negotiated separately, often in a side letter.
The Takeaway
A SAFE note is a simple contract for future equity: no interest, no maturity and no stockholder rights until conversion. The YC post-money form makes each investor’s ownership predictable, but it shifts the cumulative dilution of every SAFE onto founders. Use standard forms, model your cap table and keep your securities filings current.
How Sutter Law Can Help
Sutter Law helps founders and investors negotiate SAFEs, model conversion and prepare for priced rounds. Learn more about our venture capital practice, or contact us for a free consultation.
This article is general information, not legal advice. Reading it does not create an attorney-client relationship.
