SAFE vs convertible note vs priced round: what you are actually signing

A SAFE exchanges cash now for a contractual right to future equity, usually on a later priced financing; it is not a loan. A convertible note is debt that may convert to equity under agreed conditions and normally carries interest and a maturity date. A priced round issues shares at a negotiated price now. All three can finance the same company; each makes a different promise about timing, dilution and investor rights. The practical question is not which abbreviation looks fashionable. It is what percentage and which rights the founder gives up under the financing that actually happens.

How do these three instruments differ at a glance?

This table describes common U.S. startup practice, not an instruction to use any instrument in any jurisdiction. A SAFE on a company incorporated outside the United States, for example, raises local company-law and tax questions that a U.S. template cannot answer. Even within Delaware, the charter must authorize the shares ultimately issued. A useful habit is to give counsel the entire financing stack, including side letters, not just the most recent template.

What does a YC SAFE actually promise?

The Y Combinator financing documents explain the standard form: the investor transfers money today; the company agrees to deliver shares on a future equity financing, or apply the form's specified treatment on a liquidity or dissolution event. The investor has not bought the same preferred shares that the next lead investor will buy. At conversion a SAFE may receive a separate series of preferred stock with economics adjusted for its conversion price. The form's definitions matter as much as its headline cap.

YC says an equity financing automatically converts its post-money SAFE without a minimum financing threshold in that form. Do not carry that sentence across to an unrelated note or a customized SAFE. An acquisition before conversion is not the same as a priced financing; read the liquidity-event election and payout waterfall. Dissolution provisions do not turn the instrument into guaranteed principal repayment: if the company has insufficient assets, contracts cannot manufacture money. Nor does a standard SAFE's lack of maturity make the investment risk-free. A company that never prices a round can leave investors waiting, subject to any other contractual event.

Which four variants are people referring to?

The brief for this article calls for all four familiar forms. There is a dating problem with treating them as four current standard YC downloads. YC's current documents page describes three standard SAFE forms: post-money valuation cap, discount and most-favored-nation (MFN). Its earlier post-money user guide additionally discusses a combined valuation-cap-and-discount version. Read both the edition and the actual signed form; do not assume a combined version is today's default.

1. Cap only. A ceiling on the conversion valuation. With a sufficiently high new-money price, the capped calculation gives the investor a lower effective price.
2. Discount only. Conversion at a specified percentage of the priced-round share price; a 20% discount commonly appears as an 80% discount rate in the form.
3. Cap plus discount. The signed contract typically chooses the more favorable of its cap and discount prices. It does not normally apply the discount again to the capped price.
4. MFN. An initially uncapped, undiscounted form with a right to adopt qualifying more-favorable terms from later SAFEs as defined by the agreement. It is not a promise that every later document's unrelated concession automatically transfers.

An uncapped SAFE is not a synonym for an MFN SAFE. YC's current explanation says a discount form can be configured with a 100% discount rate (meaning no discount), while an MFN form has a separate future-term adjustment mechanism. Both defer a cap decision, but they expose the investor and founder to different future outcomes. If the company later sells a low-cap SAFE, an MFN election could change the economics of an earlier issuance. That makes an issuance ledger with signing, funding and amendment dates essential.

How does a post-money cap turn into ownership?

YC's post-money explanation says “post” includes the outstanding SAFE money but is still before the priced round's new cash. The easy estimate is therefore SAFE purchase amount ÷ post-money valuation cap. Suppose a company has founders and existing options and takes $1 million on a $5 million post-money cap. If the next priced valuation is comfortably above that cap, the SAFE holder's planning percentage is 20% immediately before the new priced money. It is not 20% after that new round. YC's guide expressly warns that a low round valuation or one too close to the cap can produce more than the simple estimate.

For an intentionally simplified financing, suppose that SAFE converts at 20% immediately before a priced financing, and the new investors buy 25% of the post-financing company. Assume no pool expansion, other convertibles or special price adjustments. The old owners' 80% becomes 60%; the SAFE's 20% becomes 15%; new cash owns 25%. The table balances to 100%. The investor did not lose shares; issuing new shares changed the denominator. The exact financing spreadsheet must implement the signed capitalization definitions, not merely multiply three percentages.

“Post-money” does not mean immune to every pre-round change. The YC guide distinguishes existing options and options granted before the priced round from a new or increased option pool negotiated in the priced round. That financing pool can change the effective pre-money ownership borne by existing owners and SAFEs. A term sheet saying “$9 million pre-money” is incomplete without a fully diluted share count, treatment of convertibles and a target option-pool percentage. Ask for an as-converted model before deciding whether the valuation is attractive.

When does a cap beat a discount?

Work in shares, not impressions. In a deliberately simplified example, assume a priced investor pays $2.00 per share. A SAFE has a 20% discount and a cap-derived conversion price of $1.20 per share. The discount price is $2.00 × 80% = $1.60. If the signed instrument uses the more favorable price, the cap wins: a $120,000 investment converts into 100,000 shares at $1.20 rather than 75,000 shares at $1.60. This illustrative cap-derived price is an assumption, not a universal shortcut for computing the YC cap price; the fully diluted capitalization definition sets that actual price.

Reverse the price assumption. If the cap-derived price were $1.90 while the 20%-discount price remained $1.60, the discount wins: $120,000 buys 75,000 shares at the assumed $1.60 price, versus roughly 63,158 shares at $1.90. The combined instrument uses the better route, not $1.90 × 80%. A cap is a conversion-price ceiling, not a present-day corporate valuation certificate. A discount is a price adjustment, not an ownership percentage. Either can affect later preferred-stock liquidation calculations in instrument-specific ways; the conversion spreadsheet should show shares and liquidation economics.

What changes when the instrument is a convertible note?

A note starts as a creditor claim. Its principal, interest, repayment and maturity provisions deserve as much attention as the valuation cap. A note may define “qualified financing” by a negotiated minimum capital raise and allow a different outcome for a non-qualified financing. It may convert principal plus accrued interest at a discount or cap. Whether interest is simple or compounded and whether it converts, is repaid or is waived are questions for the actual instrument, not assumptions to import from another company's deal.

For arithmetic only: assume a $200,000 note with 6% annual simple interest, exactly 18 months elapsed, interest converting alongside principal and no compounding. Accrued interest is $200,000 × 0.06 × 1.5 = $18,000. The conversion balance is $218,000. At an assumed $1.00 conversion price, it receives 218,000 shares. At a $0.80 conversion price it receives 272,500 shares. Both differences matter to the founder; neither describes a market-standard coupon. If the signed note says interest is payable in cash, this example does not apply.

Now imagine the note reaches its maturity date without a qualifying round. There is no rule that all convertible notes automatically convert at maturity. Some documents give the holder repayment rights; some allow conversion at a specified valuation; some specify an election, a vote of majority noteholders, an extension process or an event of default. Parties sometimes negotiate extensions because a cash-poor startup cannot readily repay the debt, but negotiation is not a legal substitute for performance. Counsel should assess notice periods, waiver mechanics, creditor priority and solvency before a deadline arrives. Do not tell investors that their note is “basically a SAFE” and then discover a demand for cash.

How do four apparently small SAFEs stack up?

Picture four independently issued cap-only post-money SAFEs. The company receives $200,000 at a $4 million cap, $250,000 at a $5 million cap, $300,000 at a $6 million cap and $250,000 at a $10 million cap. For a later round sufficiently above every cap and under the simplified YC ownership planning method, the slices are 5%, 5%, 5% and 2.5%. That is 17.5% sold before the new priced investors arrive, on $1 million of cash received. The different cap amounts cannot be replaced with the latest $10 million cap; each agreement survives on its own terms.

If the later priced financing sells 25% post-money to fresh investors and there are no option-pool changes, previous owners hold 82.5% before new money and 61.875% afterward; converted SAFEs hold 17.5% before new money and 13.125% afterward; the lead owns 25%. This is not a forecast of the actual cap table: a down round, discounts, MFN elections, option issuances, side letters and the specific SAFE wording can alter conversion. It is a demonstration that dilution should be tracked at each close. A founder who only logs dollars and the latest cap has not modeled the financing.

The aggregation problem also appears with small checks from a community. If a public securities offering is contemplated, instrument choice does not remove offering-law obligations. The Reg CF guide explains the separate U.S. exemption and intermediary framework; the crowd cap-table guide discusses what happens to holders and consent when a community round precedes institutional money. A private SAFE close and a publicly marketed crowdfunding campaign are not interchangeable distribution channels.

Why would a founder pay to price a round now?

A priced round settles share issuance now, rather than promising to settle it later. An investor and company negotiate a pre-money valuation, number and class of shares, funding at closing and the post-financing ownership schedule. For a lead-led seed financing, they can also settle board seats, vetoes, information rights, participation rights, transfer restrictions and preferred-stock economics once rather than leaving five side letters to reconcile later. That is useful when an investor will do the work of leading the round and the company needs a clear governance structure.

The tradeoff is documentation and execution. The National Venture Capital Association model documents provide starting points for a certificate of incorporation, stock purchase agreement, investors' rights agreement, voting agreement and right of first refusal/co-sale agreement. NVCA explicitly says its models must be tailored and are not legal advice. A signed term sheet alone does not authorize unissued preferred shares; counsel addresses the company's charter, approvals, securities exemption and closing deliverables. This takes coordination. There is no defensible universal legal bill: jurisdiction, counsel, shareholder approvals, existing instruments and negotiation complexity change the fee. Ask for a scoped quote and assumptions rather than trusting a blog's invented price.

A preferred share's liquidation preference can be more consequential than a small difference in headline valuation. For example, a conventional nonparticipating 1× preference means a preferred holder commonly chooses between its original investment back and the proceeds it would receive on an as-converted common basis, subject to actual charter terms and remaining proceeds. Participating preference, seniority or a multiple can produce a very different exit distribution. “Priced” tells you when shares are issued; it does not tell you whether economics are founder-friendly.

Which side letters and rights change the answer?

Start with pro rata. The YC guide describes a separate optional side letter available with valuation-cap forms. It is a right to subscribe for some of the next round at that round's terms, not an extra number of shares issued for free on SAFE conversion. If an investor has 10% as-converted ownership before a $3 million next round and the letter gives a corresponding pro rata opportunity, a rough planning allocation is $300,000 of that round, subject to document definitions and allocation. If they exercise, they pay that $300,000. The founder must know whether the new lead's requested allocation leaves enough room.

MFN is a different right: it may let an earlier investor switch to later qualifying SAFE terms. Information rights can require regular financial reporting to a holder before or after conversion. Major-investor thresholds in a priced round can determine who receives ongoing rights; an old letter may promise treatment that conflicts with the new threshold. Consent rights can control an amendment, conversion, sale or subsequent financing. A cap table listing only percentages misses all four. Maintain a rights matrix alongside the ledger and make sure counsel sees every amendment.

Not every investor gets every right. A lead may ask for governance and diligence rights that would be impractical to grant to a hundred small investors. Conversely, deleting small holders from a spreadsheet does not cancel their signed contracts. The SPV explainer describes a separate vehicle that can aggregate investments in appropriate circumstances; it is not a retroactive way to nullify investor rights or sidestep offering rules. If outreach and verification are involved, see the KYC/KYB/AML guide as well.

What should a financing model show before anyone signs?

Keep two versions of the schedule: a legal securities register and an economic scenario model. The register answers who actually holds issued shares and enforceable contracts today. The scenario model answers what those contracts could become if a particular financing closes. Before conversion, a SAFE is not simply a block of already-issued preferred shares; displaying its hypothetical shares in the register as if already issued creates confusion about votes, dividends and outstanding-stock approvals. Label assumptions with the date and document version used. A founder should be able to reproduce the model from signed paperwork without searching through old email threads.

Model alternative outcomes rather than only the optimistic next round. In an acquisition before any priced financing, a SAFE's liquidity-event provisions and a note's change-of-control provisions may allocate proceeds differently from their financing-conversion spreadsheet. In a dissolution, the order of creditor claims, contractual payment rights and available assets can overwhelm an appealing valuation cap. In a flat or down-priced financing, the capped conversion route may not deliver the tidy ownership ratio quoted in a pitch. Negotiating an amendment after investors have paid is not equivalent to choosing sensible terms before they fund. In each scenario, show what happens to the founder, each class of investor and the employee pool, then ask counsel to check the waterfall.

Also separate economic dilution from control. Owning 65% of a fully diluted company does not necessarily mean a founder can approve every material corporate action alone. A preferred financing may require a preferred-class vote for new securities or a sale; a board seat has its own decision-making role; investor agreements can impose contractual consent even without a majority stake. Likewise, a SAFE holder's expected future percentage does not automatically give a present shareholder vote. The cap-table spreadsheet and a rights matrix answer different questions, and a sound financing review uses both.

Make a baseline share schedule: outstanding common, outstanding options, reserved but unissued options, warrants, every SAFE and note, including its signed date, funded amount and rights. Then model at least a high-valuation financing, a financing near or below the lowest cap, and no qualifying financing before any note maturity. For each scenario show fully diluted percentages just before and just after new money, the option-pool adjustment, conversion prices and shares, who funds any pro rata allocation, and how much cash would be due if debt does not convert. Reconcile the total to 100% each time.

Ask a second person to trace one investor from document to spreadsheet. Does the spreadsheet use a post-money cap when the contract says pre-money? Does it accrue the note's interest through the actual closing date? Does a 20% discount become 80% of price rather than 20% of shares? Is an MFN election silently ignored? Is the new hiring pool included in the pre-money capitalization? Does a side letter promise future shares or merely an option to purchase them? Small errors in these inputs create large differences in outcomes.

The decision is not “SAFE good, note bad” or “priced round only for grown-up startups.” If a few investors want to fund a company on rolling closes without negotiating governance, a properly modeled SAFE can be sensible. A note can suit a bridge where all sides understand debt and maturity risk. A priced round can suit a lead ready to set rights and ownership now. None eliminates the need for a lawful securities offering. Discuss your jurisdiction and the actual distribution plan with qualified counsel before soliciting or signing.

Frequently asked questions

Is a SAFE debt or stock?

A YC SAFE is neither a loan nor stock at signing: it is a contractual right to future shares or specified proceeds on a liquidity or dissolution event. The YC form has no interest or maturity date. Read the actual agreement for conversion and payout terms.

Does a $1 million SAFE at a $5 million post-money cap sell 20%?

At a sufficiently high priced-round valuation, $1 million divided by a $5 million post-money cap implies approximately 20% immediately before new priced-round money, subject to the form's capitalization definitions and conversion mechanics. The priced-round new money and any negotiated pool increase can dilute that holding further.

Which four SAFE variants are described in older YC materials?

Older YC post-money materials describe cap only, discount only, cap plus discount, and MFN. YC's current document page describes three standard forms: cap, discount, and MFN. A combined cap-and-discount form is not a current default form; check the edition before signing.

Does a post-money SAFE automatically include pro rata rights?

No. YC publishes a separate optional pro rata side letter for eligible valuation-cap SAFEs. Its rights, eligible financing, notice and allocation must be reviewed separately; the SAFE alone does not grant them.

What happens if a convertible note matures before a priced round?

There is no universal automatic conversion rule. The signed note determines whether principal and interest become payable, whether a holder can demand payment or elect conversion, and what defaults apply. Parties often negotiate an extension or amendment; counsel should review the actual note and solvency implications.

Does a valuation cap set the company's present valuation?

No. A cap establishes a conversion-price ceiling under a future financing formula. It is not itself a priced sale of current preferred stock or a third-party appraisal of fair market value.

When is a priced round worth considering?

A priced round may be useful when a lead investor and company are ready to negotiate present ownership, preferred-stock economics, governance, information rights and closing conditions. It generally involves more documentation than a single SAFE; costs are deal-specific, not a fixed universal price.

Can a SAFE with both a cap and discount apply both at once?

Typically the investor receives the more favorable conversion price under the agreed formula, not two sequential discounts. Exact conversion and capitalization definitions depend on the signed document.