TL;DR
A convertible note is startup debt that can convert into equity, usually when the company raises a later priced equity Round. Unlike a standard SAFE, a note commonly has interest, a maturity date, and debt-like consequences if the expected financing does not arrive.
Convertible note terms that matter
| Term | What it does | Founder risk |
|---|---|---|
| Principal | The amount invested as debt before conversion. | Sets the base amount that may convert or need repayment. |
| Interest | Accrues additional value for the Investor over time. | Increases conversion amount and dilution if the Round takes longer. |
| Maturity date | Date when the note is due unless converted or amended. | Can force renegotiation or repayment pressure. |
| Valuation cap | Maximum valuation used for conversion pricing. | Low cap can create heavy dilution if company value rises. |
| Discount | Discount to the next priced Round share price. | Can stack with interest and cap economics. |
| Qualified financing | Minimum priced Round size that triggers automatic conversion. | If not reached, conversion may be uncertain. |
Also Read: SAFE startup funding
Convertible note versus SAFE
A convertible note gives Investors debt-like features. A standard SAFE is designed as future equity without note interest or maturity. That makes a SAFE simpler, but not automatically better. Notes can fit bridge financing where Investors want a maturity date and founders are confident about the next priced Round. SAFEs fit earlier financing where both sides want speed and are comfortable with future conversion.
When a convertible note is a good fit
- The company is between milestones. The note funds a clear bridge to a priced Round or material evidence event.
- Investors understand the risk. Both sides know what happens if the qualified financing is delayed.
- Debt terms are not punitive. Interest, maturity, and default mechanics should not create avoidable company risk.
Founder checklist before signing
- Model conversion with principal plus accrued interest.
- Test outcomes at multiple next-Round valuations.
- Confirm whether cap and discount interact or the Investor receives the better outcome.
- Know what happens at maturity if no qualified financing occurs.
- Store notes, amendments, side letters, and conversion schedules in the Data Room.
Bottom line
A convertible note can be appropriate when the company needs a bridge and Investors want debt-style protection. It is a poor shortcut when the founder has no credible path to conversion or repayment. If the next Round slips, the maturity date becomes a real business problem.