How does a convertible note's discount and valuation cap interact at conversion?

At the qualifying financing, the noteholder's conversion price is generally the lower of the discounted round price (round price times the discount percentage) and the price implied by the valuation cap, so both mechanisms exist to protect early investors and the lower resulting price applies. This means a MedTech company that develops rapidly and prices its next round far above the cap will convert its bridge noteholders at the cap price, giving them substantially more shares than the discount alone would have. Companies should model both mechanisms against a range of future round valuations before agreeing to note terms.

Why do MedTech companies still use convertible notes when SAFEs are simpler?

Convertible notes remain common for bridge financings between priced rounds, particularly when existing preferred shareholders or crossover investors want the seniority and defined repayment terms that debt provides ahead of a near-term milestone like a pivotal trial readout or a follow-on priced round. Some investors, particularly institutional or later-stage funds bridging an existing portfolio company, prefer a note's fixed maturity and interest accrual as downside protection compared to the open-ended nature of a SAFE. Notes are also sometimes required by existing charter documents or investor rights agreements that do not contemplate SAFE issuance.

What is the biggest structuring mistake with stacked convertible notes?

Issuing multiple notes over time with inconsistent interest rates, discounts, and caps creates a complex conversion waterfall that can be difficult to model accurately and often surprises founders when the priced round finally triggers conversion for all notes simultaneously. A related mistake is failing to negotiate a clear conversion mechanism or automatic conversion trigger, leaving ambiguity about what counts as a qualified financing and creating disputes at the exact moment the company most needs a clean, fast closing. Standardizing terms across bridge notes, even when raised from different investors at different times, meaningfully reduces this risk.

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Convertible Note

Short-term debt that converts into equity at a future financing round.

Reviewed by Christian Espinosa, Founder, Blue Goat CyberLast reviewed May 5, 2026

Definition

A convertible note is a debt instrument that accrues interest and has a maturity date, but is designed to convert into preferred stock at the next qualified equity financing - typically at a discount to that round's price and subject to a valuation cap. Typical terms include an interest rate of a few percent, a maturity of 12 to 24 months, a discount of around 15 to 25 percent and a valuation cap. If no qualified financing occurs before maturity, holders may demand repayment or negotiate conversion or extension. Because notes are debt, they rank ahead of equity in a liquidation.

What the regulation says

In the United States, convertible notes offered to finance a MedTech company are generally securities. The Securities Act of 1933, enacted May 27, 1933, requires registration under Section 5 unless an exemption applies. Section 4(a)(2) exempts transactions by an issuer not involving a public offering. Regulation D provides commonly used pathways: Rule 506(b), 17 CFR 230.506(b), prohibits general solicitation and permits accredited investors plus up to 35 non-accredited purchasers meeting sophistication requirements. Rule 506(c), effective September 23, 2013, permits general solicitation, but all purchasers must be accredited investors and the issuer must take reasonable steps to verify that status. Exemption from registration does not remove antifraud obligations under Securities Act Section 17(a). Disclosures should accurately explain conversion triggers, interest, maturity, discounts, valuation caps and material business risks, including regulatory milestones relevant to the MedTech company. Rule 506(b) requires specified disclosures when non-accredited investors participate. These securities provisions do not prescribe standard interest rates, discounts or maturity periods, and model financing documents are drafting aids rather than binding regulations. Securities compliance is separate from medical-device authorization and does not establish product safety or effectiveness.

What this means in practice

Convertible notes pre-date SAFEs and remain common in MedTech bridges between priced rounds, especially when a company needs runway to hit a clinical or regulatory inflection point. Because notes carry interest and a maturity date, they create real risk if the next round is delayed.

Examples

A surgical robotics startup raises a $3M bridge convertible note at 6% interest, 20% discount, $40M cap to extend runway to a pivotal trial readout.

Common pitfalls

•Letting notes mature without a conversion trigger - investors can demand repayment in cash the company doesn't have.
•Stacking notes with conflicting caps and discounts that complicate the cap table.

Frequently asked questions

If a convertible note matures without a qualifying financing to trigger conversion, the noteholder technically has the right to demand repayment of principal plus accrued interest in cash, which can be a serious liquidity event for a MedTech company still awaiting a regulatory or clinical milestone. In practice, most maturing notes are extended, converted into an existing equity round at negotiated terms, or restructured, but this requires investor cooperation and can shift leverage toward noteholders during the negotiation. This maturity risk is the key structural difference from a SAFE, which has no maturity date at all.

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Valuation Cap

Maximum company valuation at which a SAFE or note converts to equity.

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Bridge Round

Interim financing between priced rounds, usually convertible.

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Simple Agreement for Future Equity(SAFE)

Convertible instrument that converts to equity at a future priced round.

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Series A / B / C Financing Rounds

Sequential priced equity rounds in venture-backed companies, typically progressing from product-market validation (A) to scale (B) to growth (C+).

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Term Sheet

Non-binding outline of the key economic and control terms of an investment.

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Capitalization Table(Cap Table)

Ledger of all securities issued by a company and who owns them.

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Due Diligence

Investigation of a company before an investment, financing, or acquisition.

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Updated: 5/5/2026

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Short-term debt that converts into equity at a future financing round.

·Convertible notes pre-date SAFEs and remain common in MedTech bridges between priced rounds, especially when a company needs runway to hit a clinical or regulatory inflection point.
·Because notes carry interest and a maturity date, they create real risk if the next round is delayed.
·Typical terms include an interest rate of a few percent, a maturity of 12 to 24 months, a discount of around 15 to 25 percent and a valuation cap.

Remember this

Watch out: Letting notes mature without a conversion trigger - investors can demand repayment in cash the company doesn't have.

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