
Short-term debt that converts into equity at a future financing, carrying interest and a maturity date.
A convertible note is a loan that is expected to convert into equity rather than be repaid in cash. It carries an interest rate and a maturity date, and it sits ahead of equity in the capital structure because it is legally debt.
Like a SAFE, it defers valuation to a future priced round. Unlike a SAFE, it creates a genuine obligation: if the note matures without converting, the holder can in principle demand repayment.
Notes are used for bridge financings between priced rounds, for early rounds where valuation is genuinely unknowable, and in situations where investors want the protection of creditor status. Accrued interest typically converts into equity alongside principal rather than being paid in cash.
Where a maturity date approaches without a qualifying round, the parties usually extend rather than enforce — but the leverage that deadline creates is the point.
Faster and cheaper than a priced round while preserving control. The maturity date is the catch: it is a hard deadline that can arrive at the worst possible moment, handing negotiating leverage to noteholders exactly when the company is least able to resist.
Creditor status provides meaningful downside protection that a SAFE does not — in an insolvency, debt ranks ahead of equity. Interest compensates for time at risk. The main frustration is the same as with SAFEs: no governance rights and no certainty about eventual ownership until conversion.
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