Convertible Notes vs. SAFEs for Your First Startup Raise

Founders raising their first outside money almost always face the same choice: a convertible note or a SAFE (simple agreement for future equity). Both instruments let a startup raise cash now and defer the hard question of what the company is worth until later, usually at a priced equity round. But they get there differently, and those differences change how much of the company you and your early investors actually end up owning. There is no instrument that is right for every founder. The mechanics below should help you understand what you are agreeing to before you sign anything.

Why Founders Use Either Instrument at All

Pricing a company's first round is genuinely hard. A pre-revenue startup with no comparable sales, no track record, and often no product yet has no reliable valuation. Rather than negotiate a share price with a handful of angel investors, founders and early investors agree to postpone that valuation conversation. The investor puts in money today. Instead of buying stock at a fixed price, the investor gets the right to convert that money into stock later, at a future priced round, usually at a discount or subject to a cap that rewards them for taking early risk.

A convertible note is a debt instrument: it has a principal amount, typically accrues interest, and usually carries a maturity date by which it must convert or be repaid. A SAFE is not debt at all. It has no interest rate and no maturity date. It is a contractual right to receive equity when a triggering event, usually a qualified financing, occurs. That structural difference drives most of the practical distinctions founders care about.

How Dilution Actually Gets Calculated

Both instruments typically include one or both of two dilution-limiting features:

• A valuation cap. This sets the maximum company valuation at which the note or SAFE converts, regardless of what the priced round's actual valuation turns out to be. If your seed round prices at a $10 million valuation but your SAFE holders have a $6 million cap, they convert as though the company were worth $6 million. That gets them more shares per dollar invested than new round investors get.
• A discount rate. This gives note or SAFE holders a percentage discount off the price per share that new investors pay in the priced round, commonly somewhere in the 15 to 25 percent range depending on what the parties negotiate. There is no fixed market number, and you should treat any discount or cap you hear quoted as a starting point for negotiation, not a rule.

When a note or SAFE has both a cap and a discount, it typically converts at whichever produces the lower price per share for the holder, meaning more shares. That mechanic is exactly why early money is expensive money on a per-share basis: investors who took risk before the company had traction get compensated with a better conversion price than investors who show up once the company is de-risked.

The founder-facing consequence is straightforward but easy to underestimate: every note or SAFE you stack on top of another one increases the total slice of the company that converts into shares at the priced round, and that dilution comes out of the pool that founders and the new lead investor are dividing up. Two SAFEs at different caps, issued six months apart, will convert at different effective prices even though they are triggered by the same financing event. Before you take a third or fourth check on a SAFE, model out roughly how much of the fully diluted cap table those instruments will consume once they convert. A term that looks generous in isolation looks different once stacked against everything else you have already issued.

Interest, Maturity, and What Happens if You Do Not Raise a Priced Round

Because a convertible note is debt, it accrues interest, which increases the amount that eventually converts into equity, or that the company may have to repay in cash if no qualifying round happens. It also has a maturity date. If the company has not raised a priced round by that date, the note technically comes due, and the company and the noteholder have to work out what happens next: extension, repayment, or conversion at a negotiated price. That maturity date creates real pressure on a founder if fundraising is slower than expected.

A SAFE avoids both problems by design. There is no interest accruing and no maturity date forcing a resolution. That is a real advantage for a founder who is not confident about the timeline to a priced round. It is also a reason some investors prefer notes: the maturity date gives them a mechanism to force a conversation if the company stalls, and interest gives them something for their money if things drag on.

Investor Priority and What You Are Actually Promising

Because a convertible note is debt, it sits ahead of equity holders if the company is liquidated or wound down, at least up to the principal and accrued interest. A SAFE holder, having no debt claim, generally has less priority in a wind-down scenario, though the specific SAFE and its terms control that outcome. This distinction matters more to investors than founders in most first raises, but it is worth understanding when you are negotiating terms with someone who has done this before and knows exactly what they are asking for.

Choosing Between Them for Your First Raise

The right instrument depends on facts specific to your raise: how many investors you are bringing in, whether they have a preference already, how confident you are in your timeline to a priced round, and whether your investors are angels who are comfortable with SAFEs or a fund with a house form they prefer to use. Some investors, particularly outside the startup hubs where SAFEs originated, still expect a convertible note because it is the instrument they know. Mixing instruments across a single raise, some notes and some SAFEs, is common but adds complexity to your cap table that you will have to sort out carefully when the priced round finally happens.

What matters most before you sign either document is understanding exactly how the cap, discount, interest, and any most-favored-nation clause will interact at conversion, and modeling that against your expected future round. A founder's agreement among the people building the company should already be settled before you bring in outside capital. If it is not, that is worth fixing first. For background on getting the founder-level paperwork in order before you raise, see our article on founder's agreements for startups, and for a look at how equity gets allocated among the team once outside money is involved, see our piece on equity vesting schedules for founders.

Whichever instrument you use, the document needs to reflect the actual deal you negotiated, not a template pulled off the internet without review. Our Startup & Business Law team works with founders in North Carolina and Pennsylvania on structuring first raises, drafting the instruments, and modeling how conversion terms will affect the cap table down the road. If you are preparing to raise, reach out through our contact page before you send anything to investors for signature.