There is a particular flavor of regret that lives in conference rooms during Series A negotiations: a founder who raised a seed round on a stack of "simple" agreements discovers the slice of the company she thought she owned is meaningfully smaller than she imagined. Nobody lied; the instruments did exactly what they said. The problem is that what they said was hiding inside a one-word name—simple. This checklist closes that gap, turning a SAFE round into ordered, actionable steps that protect founders and inform investors.

For the full treatment with worked math, see SAFEs: an overview of simple agreements for future equity. For the surrounding document stack, see popular legal documents for startups and the foundational startup formation legal checklist.

Phase 1: Decide whether a SAFE is the right instrument

  • Confirm a SAFE fits a deliberate financing strategy, not a substitute for one.
  • Assess investor sophistication and preference—some angel pools strongly prefer convertible notes.
  • Compare the alternatives: convertible note (debt, with interest and maturity), SAFE (no interest, no maturity), or a priced Series Seed preferred round.
  • Weigh cost vs. amount raised—legal fees can devour a small round, favoring the simplest instruments; larger rounds may justify priced preferred.
  • Check for non-dilutive funding programs that forbid debt-like instruments or impose equity-structure requirements.

Why ask first. The reflexive reach for a SAFE without asking whether it serves the company's actual situation is itself a mistake. A SAFE removed the very features—interest, maturity, security—that protect investors in a convertible note, making it company-friendly by design; whether that is a feature or a bug depends on which side of the table you sit on. If you find yourself needing many bespoke side letters, the honest answer may be that a note or a priced Series Seed fit better.

Phase 2: Set the four levers (and touch nothing else)

  • Negotiate the valuation cap—the single most important early-stage term—setting a maximum valuation for conversion (seed caps commonly run roughly $3–5M low to $8–10M high; varies widely).
  • Negotiate the discount (typically 10–20%, with 20% most common), which converts at a percentage below the priced-round price.
  • Decide whether to include a most-favored-nation (MFN) clause letting an investor match better terms granted to later SAFE investors.
  • Set the trigger—the dollar size of the future "Equity Financing" that causes conversion (commonly around $1M); watch the drafting so the threshold reflects a genuine institutional round.
  • Use a consistent, current standard form; put anything bespoke in a tightly scoped side letter, not in the SAFE itself.

Why discipline matters. Beyond the investment amount, a standard SAFE has essentially only these four levers, and most SAFEs pull only one or two. The whole value proposition collapses if you bolt on bespoke terms. The cap is what makes early SAFE investing worth the risk—it protects the early investor against "valuation whiplash" when the company's success drives a high priced-round valuation.

Phase 3: Understand post-money vs. pre-money and model the dilution

  • Identify whether the form is pre-money (early investor's percentage floats and shares later dilution) or post-money (Y Combinator's 2018 default, which fixes and protects the early investor's percentage).
  • Recognize that under post-money SAFEs, the protected percentages stack, and the dilution lands on the founders.
  • For each SAFE, estimate the locked-in percentage (roughly, investment amount ÷ post-money cap) and add them up.
  • Model the cumulative effect of all SAFE tranches—the "SAFE pileup"—before selling another one.
  • Model conversion into the Series A negotiation from the start, including the new option pool.

Why the post-money shift is seismic. The 2018 change looked technical but quietly moved a large amount of dilution risk from investors onto founders. Each post-money SAFE carves out a fixed, protected percentage; sell enough and you can give away far more of your company than you realized, because you were thinking in dollars raised rather than in protected percentages conveyed. A founding team can walk into a Series A expecting a comfortable majority and walk out near 45–50%, entirely from instruments signed as "simple" seed paper. The defense is to run the combined math and get every party to sign off on a single pro forma.

Phase 4: Watch the phantom liquidation preference and run the conversion math

  • Recognize that a SAFE converting at a cap or discount receives preferred stock at a lower price but usually carries the full round's liquidation preference.
  • Compute the implied preference multiple (1.25x at a 20% discount; potentially 4x or more with a wide gap between a low cap and a high priced-round valuation).
  • Where the gap is large, consider drafting around it with "shadow preferred" (a matched 1:1 preference) or "discount-in-common" (extra shares delivered as common).
  • Agree on the fully diluted denominator conventions (whether converting SAFE shares and the new option pool sit in the pre-money or post-money capitalization).
  • Build one pro forma model everyone reviews before closing; do not run conversions on a napkin.

Why the phantom preference is a hidden trap. Liquidation preference is the money preferred stockholders get off the top in a sale before common stockholders see a dime. A phantom multiple quietly enlarges the SAFE holders' off-the-top claim at the founders' expense, and it surfaces in a modest exit—precisely where every dollar is contested. The standard Y Combinator and Practical Law forms do not solve it for you, and a Series A lawyer who spots a fat phantom preference will not be shy about repricing the deal around it.

Phase 5: Comply with the securities laws

  • Treat every SAFE sale as the sale of a security; identify the exemption you are relying on.
  • Default to Regulation D, Rule 506(b) (17 C.F.R. § 230.506(b)): unlimited accredited investors plus up to 35 sophisticated non-accredited, no general solicitation.
  • Confirm each investor's accredited status under Rule 501 (income, net worth, or the newer professional/knowledgeable-employee categories).
  • If you must publicly solicit, use Rule 506(c) and take reasonable steps to verify accreditation.
  • File a Form D notice with the SEC within 15 days of the first sale, and attend to state "blue sky" notice filings.
  • Remember the anti-fraud rules (Securities Act § 17(a); Exchange Act § 10(b); SEC Rule 10b-5) apply regardless of any exemption.

Why this is not optional. Section 5 of the Securities Act of 1933 requires every offer and sale of a security to be registered unless an exemption applies; startups never register, so the round lives or dies on the exemption. Section 4(a)(2) exempts non-public offerings (SEC v. Ralston Purina Co., 346 U.S. 119 (1953))—whether offerees can "fend for themselves"—but most issuers prefer Regulation D's bright lines. Selling to non-accredited investors beyond the limits, or soliciting publicly without 506(c)'s verification, can blow the exemption, give investors a rescission right, and expose the company to enforcement. Doing a SAFE round without competent securities counsel is a false economy.

Phase 6: Handle side letters and close cleanly

  • Limit side letters; grant pro-rata (preemptive) rights to as few parties as possible.
  • Where pressed, limit a pro-rata right to the Next Equity Financing rather than every future round.
  • Decline board seats, observer rights, and information rights for seed investors absent a real reason.
  • Track every side letter as a separate obligation to honor and disclose in diligence.
  • Record each SAFE on the cap table using the valuation cap as the stand-in, with footnoted assumptions (and a note that a lower priced-round valuation converts into more shares).
  • Run the intended SAFE and any side letter past tax and securities counsel before signing.

Why side letters can sink you. Once one investor gets a side letter, the next wants one too, and a thicket of overlapping promises quietly recreates the negotiation overhead the SAFE was meant to eliminate. A clean, footnoted, assumptions-stated cap table is how you avoid being ambushed by your own paperwork. As new investors arrive across rounds, keep the cumulative dilution honest—see the complete guide to adding new investors after your seed round.

Common mistakes

  • Reaching for a SAFE reflexively. It should fit a deliberate strategy, not replace one.
  • Negotiating bespoke terms into the SAFE. Keep to the four levers; put extras in a tight side letter.
  • Ignoring post-money stacking. Protected percentages add up and land on the founders.
  • Skipping the conversion model. The dilution surprise almost always comes from teams that treated conversion as a problem for later.
  • Overlooking the phantom liquidation preference. A low cap or steep discount can create an off-market multiple.
  • Treating the SAFE as outside securities law. It is a security; comply with Regulation D, file Form D, and respect anti-fraud rules.
  • A vague "Friends & Family" block on the cap table. Model the SAFE with stated assumptions instead.

Primary authority

  • Securities Act of 1933, § 5 — registration requirement; § 4(a)(2) — private-offering exemption (SEC v. Ralston Purina Co., 346 U.S. 119 (1953)).
  • Regulation D, Rule 506(b) and 506(c) (17 C.F.R. § 230.506); Rule 501 (17 C.F.R. § 230.501) — accredited-investor private placements; Form D filing.
  • Securities Act § 17(a); Securities Exchange Act § 10(b); SEC Rule 10b-5 — anti-fraud rules applicable regardless of exemption.
  • State "blue sky" laws — notice filings; largely preempted for covered Rule 506 offerings but still requiring fees/notice.
  • IRC § 409A — relevant because a SAFE tends to keep common-stock fair market value (and option strike prices) lower than a priced round.

Related resources

This checklist provides general information and is not legal advice. SAFEs are securities, and their use, conversion mechanics, tax treatment, and securities-law compliance vary by jurisdiction and by the facts of your financing. Consult qualified securities counsel and a startup-experienced accountant before issuing or investing in a SAFE.