A convertible note is a short-term loan an investor makes to an early-stage company that is designed to convert into equity — usually preferred stock — at the company's next priced funding round instead of being repaid in cash. In other words, it starts life as debt (it carries an interest rate and a maturity date) but almost always ends its life as ownership. Founders use it because it lets a startup raise money fast without having to agree on a company valuation today; that hard negotiation gets deferred to the next round, when a lead investor sets the price. The note's key economic terms — the valuation cap, the discount, the interest rate, and the maturity date — determine how many shares the investor ultimately receives.
Convertible notes are a startup and venture instrument. If you run an operating business with real revenue and you need working capital, a convertible note is usually the wrong tool — you would be giving away future ownership to solve a cash-flow problem that revenue-based financing can solve without touching your equity. We cover both paths below.
Key takeaways
- A convertible note is short-term debt that is designed to convert into equity at a company's next priced funding round rather than being repaid in cash.
- Four terms drive every outcome: the valuation cap, the discount rate, the interest rate, and the maturity date.
- When a note has both a cap and a discount, it typically converts using whichever gives the investor more shares.
- Unlike a SAFE, a convertible note carries interest and a maturity date, so it can become a cash repayment obligation if no qualifying round closes in time.
- Convertible notes are a startup/venture instrument — not a working-capital product for an operating business.
- For a revenue-generating business, revenue-based financing raises capital without selling equity: approval keys off bank deposits and revenue, from about $10,000, FICO around 500+, decisions in roughly 24-48 hours.
- Equity is the most expensive capital a business has; convertible notes are best reserved for growth that only equity can fund, not for covering cash-flow gaps.
How a convertible note actually works
The mechanics are simpler than the jargon suggests. An investor wires the company money and receives a note — a contract that promises repayment with interest by a set date. But the note also says that if the company raises a qualifying priced round (a "qualified financing," often defined as raising above a threshold like $1M) before that date, the outstanding balance plus accrued interest automatically converts into shares of that new round instead of being paid back in cash.
The investor is taking early risk, so the note rewards them for getting in first in two ways:
- The discount lets them convert at a reduced price versus the new investors — for example, a 20% discount means they buy shares at 80 cents on the dollar relative to the round price.
- The valuation cap sets a maximum company valuation at which their money converts, so if the priced round comes in at a sky-high valuation, the early investor still converts as if the company were worth the capped amount. The cap protects them from being diluted away by their own success in sourcing an early check.
When both a cap and a discount exist, the note almost always converts using whichever gives the investor more shares. That single rule drives most of the outcomes founders get surprised by later.
The four terms that decide everything
Read a convertible note and you are really reading four numbers. Get these right and you understand the whole instrument.
- Valuation cap: the ceiling valuation used to price the investor's conversion. A lower cap is more founder-dilutive and more investor-friendly. An uncapped note is the most founder-friendly version but is rare because investors dislike open-ended risk.
- Discount rate: the percentage break on the next round's price, commonly in the 10%–25% range. It compensates the investor for converting later at a higher-priced round.
- Interest rate: usually modest (for example, 4%–8% simple interest). It typically accrues and converts into equity rather than being paid in cash — it is not a monthly payment like a term loan.
- Maturity date: the deadline, often 18–24 months out. If no qualifying round happens before it, the note comes due. That is the pressure point: the company may owe the balance in cash it does not have, may have to extend, or may convert at a pre-negotiated fallback valuation.
The maturity date is the term founders underestimate most. A note is friendly right up until the day the money is due and the priced round has not closed.
Example: how the same note converts differently
Numbers make this concrete. Assume an investor puts in $100,000 on a convertible note with a $5M valuation cap and a 20% discount, and the company later raises a priced round. The table shows how the conversion price is chosen. All figures are illustrative — for example only.
| Scenario | Priced round valuation | Cap-based price | Discount-based price | Which applies |
|---|---|---|---|---|
| Modest up-round | $6M | Prices off $5M cap | Prices off $6M less 20% | Cap wins (more shares) |
| Strong up-round | $12M | Prices off $5M cap | Prices off $12M less 20% | Cap wins decisively |
| Flat / soft round | $4M | Cap above round price | Prices off $4M less 20% | Discount wins |
The takeaway: the cap does the heavy lifting when the company does well, and the discount protects the investor when it does not. As a founder, you should always model your own dilution at the cap, because that is the outcome a successful raise triggers.
Convertible note vs. SAFE vs. priced round
Three instruments dominate early-stage fundraising, and founders mix them up constantly.
- Convertible note: legally debt. Carries interest and a maturity date, so there is a repayment obligation if conversion never happens. More investor protection, more paperwork.
- SAFE (Simple Agreement for Future Equity): not debt. No interest, no maturity date — it simply converts to equity when a priced round happens. Faster and cheaper to paper, which is why it is now common at the earliest stages. The trade-off is the investor has no repayment fallback.
- Priced equity round: you set a valuation today and sell shares now. More expensive and slower to close (real legal work, a term sheet, a lead investor) but there is no deferred conversion surprise later.
The right choice depends on how fast you need to move, how much leverage each side has, and whether investors want the safety net that debt provides. None of these, however, is a working-capital product for an operating business.
Decision framework: when a convertible note fits — and when to avoid it
Use this as an underwriter would: match the instrument to the situation, not the hype.
A convertible note works best when:
- You are a venture-track startup planning a priced round within roughly 12–24 months.
- You and your investors genuinely cannot agree on a valuation yet and want to defer that fight.
- You need to close a small amount of capital quickly, often from angels or a bridge before a larger round.
- Your investors want debt-like protection (interest and maturity) rather than a bare SAFE.
Avoid a convertible note when:
- You run a cash-flowing operating business (restaurant, contractor, clinic, e-commerce, trucking) and simply need working capital. Selling future equity to cover payroll or inventory is the most expensive money there is.
- No priced round is realistically on your roadmap. Without a future round to convert into, you are just holding dated debt that comes due at maturity.
- You are unwilling to give up ownership or a board voice down the line.
- You need funds in days to seize a time-sensitive opportunity or cover a gap — note rounds still take weeks and legal spend.
That last case is where most of our readers actually live. If the real problem is timing your cash in versus cash out, financing tied to your revenue almost always beats giving away equity.
The better path for a revenue-generating business
Most owners who search for "convertible note" do not need one — they need capital and heard the phrase in a founder forum. If your business already deposits revenue every month, you can raise working capital without selling any ownership at all through revenue-based financing.
Through a revenue-based / MCA marketplace, approval is driven by your bank deposits and revenue rather than your credit score. Typical parameters we see: funding from around $10,000 and up, credit profiles from a FICO of roughly 500+, and decisions in about 24–48 hours because underwriting keys off your last several months of statements. Repayment flexes with your cash flow instead of demanding a fixed equity conversion or a balloon at maturity. Nothing here is ever guaranteed — approval and terms depend on your actual deposits, industry, and history.
The contrast is stark: a convertible note costs you a permanent slice of the company and only works if you raise a priced round later. Revenue-based capital costs you a defined amount of near-term cash flow and leaves your cap table untouched. For an operating business, that is usually the cheaper trade over the life of the company. Learn more in our guide to business funding options and our overview of revenue-based financing.
Risks and founder mistakes to watch
Even when a convertible note is the right instrument, a few mistakes recur:
- Stacking too many notes. Raising several notes at different caps can create a messy, over-diluted cap table that scares off your lead investor at the priced round.
- Ignoring the maturity cliff. If the round slips past maturity, you may owe cash you do not have. Negotiate extension mechanics up front.
- Setting a cap you will regret. A low cap raises money easily today but can transfer far more ownership than expected if the next round prices high.
- Treating it like free money. Interest accrues and converts, and every dollar raised on a note is future equity leaving your hands. It is deferred dilution, not deferred cost.
- Using it to plug operating cash flow. Equity is the most expensive capital in your business. Reserve it for growth investments that only equity can fund, and cover cyclical or working-capital gaps with financing tied to revenue instead.
Frequently asked questions
Is a convertible note debt or equity?
It is legally debt at issuance — it carries an interest rate and a maturity date — but it is designed to convert into equity at the company's next priced financing round. In practice it usually ends its life as ownership rather than being repaid in cash, though it can come due as debt if no qualifying round happens before maturity.
What is a valuation cap on a convertible note?
The valuation cap is the maximum company valuation at which the investor's money converts into shares. It protects early investors: if the next round prices at a much higher valuation, they still convert as if the company were worth the capped amount, which gives them more shares. A lower cap is more favorable to the investor and more dilutive to the founder.
How is a convertible note different from a SAFE?
A convertible note is debt — it accrues interest and has a maturity date, so there is a repayment obligation if conversion never occurs. A SAFE is not debt: it has no interest and no maturity date and simply converts to equity when a priced round happens. SAFEs are faster and cheaper to paper; notes give investors more protection.
What happens if a convertible note reaches maturity without a round?
The note comes due. Depending on the terms, the company may owe the outstanding balance plus accrued interest in cash, the parties may agree to extend the maturity date, or the note may convert at a pre-negotiated fallback valuation. This is the biggest risk founders underestimate, since an early-stage company often cannot repay in cash.
Should an operating business with revenue use a convertible note?
Usually no. Convertible notes are built for venture-track startups heading toward a priced round. If you run a cash-flowing business and need working capital, selling future equity to cover operating needs is the most expensive money available. Revenue-based financing keyed to your bank deposits is generally the better fit because it leaves your ownership intact.
What are typical convertible note terms?
Common terms include a discount of roughly 10%–25%, a valuation cap negotiated to the company's stage, simple interest of about 4%–8% that usually accrues and converts rather than being paid monthly, and a maturity of about 18–24 months. These are illustrative ranges, for example only — actual terms vary widely by deal and investor.
Can I raise capital without giving up equity like a convertible note requires?
Yes. If your business generates revenue, revenue-based financing through an MCA/revenue marketplace lets you raise working capital based on your bank deposits and revenue instead of selling ownership. Typical parameters are funding from around $10,000, FICO around 500+, and decisions in roughly 24–48 hours. Terms depend on your actual deposits and history, and approval is never guaranteed.
How much of my company does a convertible note cost me?
It depends mainly on the valuation cap and how high your next round prices. Because the note usually converts using whichever of the cap or discount yields more shares, a successful, high-priced round often triggers conversion at the cap — which can transfer more ownership than founders expect. Always model your dilution at the cap before signing.
