A loan that is expected to convert into shares at a future round instead of being repaid. Unlike a SAFE it is debt, so it carries interest and a maturity date — and if the round does not arrive, that date still does.
Why it matters
A convertible note gets confused with a SAFE constantly, and the confusion matters because the
two carry very different risk if things go slowly. Both defer the equity decision to a future
priced round. Only one of them is debt.
A note is a loan first, and an eventual equity position second. It accrues interest, and it has a
maturity date by which it is expected to either convert or be repaid. A founder who raises on a
note and then takes longer than expected to reach the next priced round is not just waiting — they
are watching a debt obligation approach a deadline, with a lender who has real legal remedies if
that deadline passes with nothing resolved.
How it works
Structurally a convertible note carries the same conversion mechanics as a SAFE — a valuation cap,
often a discount — plus two features a SAFE does not have.
Interest accrues on the principal from the date of investment, and it is usually added to the
amount that converts into equity, meaning the investor ends up with more shares than the cash
amount alone would suggest.
A maturity date sets a deadline. If no priced round or acquisition has happened by then, the
note is technically due for repayment — cash the company likely does not have, which is why in
practice a maturing note is usually renegotiated, extended, or converted at whatever valuation the
parties agree on the spot, often on worse terms for the founder than if a real round had arrived
on schedule.
Because it is debt, a note holder also typically sits ahead of equity holders if the company winds
down before conversion, in the same way any lender does.
Questions people ask
- Is a convertible note the same as a SAFE?
- No. Both convert into equity at a future round using a similar cap-and-discount mechanism, but a convertible note is a loan, meaning it accrues interest and carries a maturity date, while a SAFE is neither debt nor equity and has no repayment deadline attached to it.
- What happens if a convertible note reaches its maturity date without converting?
- Technically the company owes repayment, which most early-stage companies cannot actually make in cash. In practice the note is usually extended, renegotiated, or converted at an agreed valuation on the spot, often on terms less favourable to the founder than a real priced round would have set.
- Why might an investor prefer a convertible note over a SAFE?
- Because it is debt, a note holder typically ranks ahead of equity and SAFE holders if the company winds down before any conversion happens, and the accruing interest increases the eventual equity stake beyond what the invested cash alone would buy.
See also
More in Fundraising
- Bridge round — A short raise meant to carry the company to a larger round or to an exit.
- Dilution — The reduction in an existing shareholder’s percentage when new shares are issued.
- Lead investor — The investor who sets the terms, does the deepest diligence and usually takes the largest share of a round.
- Pre-money and post-money — Pre-money is what the company is agreed to be worth before new investment; post-money is that plus the money invested.
- Pro-rata — An existing investor’s right to put more money into future rounds to keep their percentage.
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Updated 2026-09-09