In this article
Convertible notes are among the most commonly used instruments in early-stage venture financing, yet the moment that matters most — the actual conversion at a priced round — is also the moment that causes the most confusion, the most last-minute recalculations, and the most friction at the closing table. This article works through the full mechanics: what the note contains, how the conversion price is determined, how accrued interest factors in, what happens when a company has issued multiple notes with different terms, and what closing day actually looks like for the attorneys, founders, and noteholders trying to get it done cleanly.
From the worked example below: USD $6 million cap, 20% discount, Series A at a USD $24 million post-money valuation.
What a convertible note actually is
A convertible note is a short-term debt instrument that automatically converts into equity at a company's next priced financing round. That single sentence contains a lot of embedded mechanics worth unpacking before getting to the conversion event itself.
A convertible note is issued as debt with three core components: a principal amount (the investment), an interest rate, and a maturity date. The investor is, legally speaking, a creditor from the moment the note is signed until the moment conversion occurs. That distinction matters because it determines priority in a wind-down scenario, it affects how the note sits on the company's balance sheet, and it creates the maturity-date pressure that shapes how both parties behave as the deadline approaches.
For founders, convertible notes offer a way to raise capital before the company is ready for a priced equity round — but the flexibility carries a cost. That cost is not just the discount and the cap, though those are its most visible expressions. Notes defer setting a valuation, not the dilution. That ownership impact becomes realized at conversion when the next round of equity funding is raised.
Convertible notes function as bridge financing between funding rounds or as an initial capital injection before a company's first priced equity round. The "bridge" framing is apt. The note exists to carry the company across a gap — from a point where valuation is genuinely difficult to establish, to a point where institutional investors have priced a round and a defensible per-share price exists.
The four core terms that drive conversion math
1. Principal
The principal is simply the amount invested. It is the starting figure for all conversion calculations. Because of how interest compounds over time, and because of how the cap and discount interact with the round price, even the principal alone carries dilutive consequences at conversion that are not always intuitive at signing.
2. Interest rate
Convertible notes accrue interest until conversion or repayment. At conversion, the accrued interest is typically added to the principal and converted into equity. This is not a theoretical detail. A $500,000 note with one year of 6% interest converts $530,000 into equity. For a note held for 18 or 24 months — which is common — that additional converting amount becomes meaningful, particularly when the conversion price is low because of an aggressive cap.
On a $500,000 note at 5% annual interest held for 24 months, founders accrue $50,000 in additional converting principal. That is 10% more dilution above the original note amount, before the cap or discount even applies. Attorneys working through the conversion schedule at closing need to nail down accrual precisely: simple versus compound interest, the exact dates from issuance to the closing date of the qualifying round, and whether the note agreement defines how partial periods are calculated.
3. The valuation cap
A valuation cap is the maximum valuation at which the note will convert. If the next round prices the company higher than the cap, the noteholder converts as if the round had priced at the cap. This is the mechanism that rewards early investors most dramatically when a company outperforms expectations.
A note with a $5 million cap converting into a $20 million round receives shares as if the round had priced at $5 million, creating meaningful upside for the early investor. To make this concrete in USD and AUD: an Australian founder whose company raises at a post-money valuation of AUD 30 million — roughly USD 20 million — while carrying a note with a USD 5 million / AUD 7.5 million cap will deliver roughly four times the share count per dollar to the noteholder compared to the new round's investors.
The valuation cap represents an additional reward for investors taking a risk by investing at the very beginning stage of a company's formation. It entitles convertible noteholders to convert to an equity stake in the company at the lower of the valuation price, or valuation cap, in the subsequent financing rounds.
4. The discount rate
A discount rate is a percentage reduction applied to the next round's share price when the note converts. For example, a 20% discount means the noteholder converts at $0.80 per share when new investors pay $1.00.
The discount rate gives noteholders a percentage reduction on the next round's share price. Standard discounts range from 15–25%, with 20% being most common. The discount is a simpler mechanism than the cap — it always applies relative to the round price — but its value to the noteholder depends entirely on how far the company's valuation has grown. The discount rewards early investors when company growth is moderate. The cap rewards early investors when company growth is exceptional.
Cap versus discount: which applies at conversion?
Generally, convertible notes convert into shares at a qualified equity financing round at the lower of two different prices per share: (1) the price per share using the conversion cap, and (2) the price per share calculated by applying a discount to the price per share of the qualified equity financing round.
The cleanest way to see this is through a worked example. Take a note with:
- Principal: USD $200,000 (approximately AUD $300,000)
- Interest rate: 6% per annum, simple
- Term: 18 months
- Valuation cap: USD $6 million
- Discount: 20%
At 18 months, principal plus accrued interest = USD $200,000 + USD $18,000 = USD $218,000 (approximately AUD $327,000).
The company closes a Series A at a post-money valuation of USD $24 million, with a per-share price of $1.20.
The same USD $218,000 buys a different share count on each path, and for a new Series A investor writing the same check:
| Path | Price calculation | Price per share | Approx. shares |
|---|---|---|---|
| Discount path | $1.20 × 0.80 | $0.96 | 227,083 |
| Cap path | $6M cap ÷ $24M post-money = 0.25 × $1.20 | $0.30 | 726,667 |
| New Series A investor | Round price, no cap or discount | $1.20 | 181,667 |
The cap path produces more than three times as many shares as the discount path. The noteholder converts at $0.30 per share. Compared to a new investor wiring the same amount, the convertible noteholder gets multiple times the shares — the reward for taking earlier risk.
The valuation cap and discount usually both apply, with the investor electing the better outcome at conversion. A note with a $5 million cap and a 20% discount converting into a round priced at $4 million would convert at $4 million × 0.80 = a $3.2 million effective valuation, not the cap. The discount only matters when the next round's discounted price falls below the cap.
The qualified financing trigger
Not every capital raise activates automatic conversion. The qualified financing threshold is the trigger. Conversion only fires automatically when the company raises above a defined dollar amount in a priced equity round. Common thresholds range from $250,000 to $2 million. If they raise below that number, the note stays debt.
Disputes arise when the qualifying financing definition is ambiguous, when the round structure involves multiple tranches, or when the company has issued both SAFEs and convertible notes that must convert simultaneously in a defined order. These are drafting problems that the closing attorney must resolve before the first dollar moves. A threshold that was set conservatively at an early stage may need interpretation if the Series A closes in multiple tranches, with some tranches arriving weeks apart.
When the trigger is met, conversion is — in theory — clean and automatic. When the qualifying financing closes, conversion is automatic under most well-drafted notes. The mechanics: the company closes above the qualified financing threshold; principal plus accrued interest is totaled; cap price versus discounted price is compared and the more favorable applies; the note converts into the same class of preferred stock as new investors; you receive shares and become an equity holder with full preferred rights.
In practice, the closing attorney and company counsel work through that sequence on a note-by-note basis before closing day, building a conversion schedule that reconciles every outstanding instrument. That reconciliation is far more complex than the single-note examples above suggest.
When there are multiple notes with different terms
Most companies that reach a Series A have issued more than one convertible note. They may have run a rolling close over several months, meaning different investors signed at different times, with different interest accrual start dates, and potentially different caps or discounts.
Closing mechanics in convertible note transactions often involve multiple investors closing on a rolling basis rather than all at once. This creates additional complexity around closing conditions and how the aggregate principal amount is calculated.
A single note with multiple holders requires unanimous or majority consent for any amendment, and creates complications when investors have different wire amounts, conversion dates, or negotiated terms. The cleaner structure is to issue a separate, individually executed note to each investor with the specific principal amount for their investment. This keeps each relationship clean and independently administrable.
The MFN clause adds another layer. MFN clauses state that if subsequent convertible notes are issued with better terms — lower cap, higher discount, additional rights — earlier investors automatically receive those improved terms. This prevents founders from incrementally worsening terms across a rolling close, where early investors get higher caps while late investors demand lower caps for the same company 90 days later.
MFN provisions in SAFEs and convertible notes can cascade across an entire instrument stack if subsequent issuances carry more favorable terms, producing aggregate dilution that no single instrument analysis would have predicted.
The practical consequence at closing: the company's attorney and the lead investor's counsel must audit every outstanding note, confirm whether any MFN clauses have been triggered, and determine the correct conversion terms for each noteholder before share issuance begins. Investors don't evaluate the headline valuation in isolation — they diligence the fully diluted cap table and the terms of any outstanding convertibles, because those instruments can convert into a meaningful portion of ownership at closing.
Pro-rata rights and side letters at the Series A
Pro-rata rights give noteholders the right to participate in the next priced round up to their ownership percentage. Without them, a Series A often brings in new investors who dilute everyone, including the noteholders who took the early risk.
Unless a pro-rata right clause is explicitly listed in the convertible note terms, convertible noteholders do not get pro-rata rights. Generally speaking, convertible notes do not include a pro-rata right clause. This means that when it does exist, it needs to be exercised and documented at the closing, adding another category of calculation to the closing schedule.
Once terms are agreed, legal counsel drafts or reviews the convertible note agreement itself, along with any side letters, pro-rata rights agreements, or board observer provisions that investors may request. Side letters granted at the seed stage can bind the company to obligations that sit outside the main note document, and when these letters are signed without careful review, a company may find itself bound by obligations to one investor that conflict with commitments made to others. MFN clauses in particular can pull unexpected terms from one investor's arrangement into every other noteholder's agreement.
All of this needs to be resolved by the attorneys and documented before the round closes. No share can be issued, no wire can settle, until the conversion schedule is clean and confirmed by all counsel.
What happens at maturity if no round has closed
The maturity date is the date by which the note must convert or be repaid. Common maturities are 18 to 24 months.
If the company has not raised a priced round before maturity, noteholders technically have the right to demand repayment. In practice, however, investors often extend the note, negotiate revised terms, or accept conversion at a default valuation.
Convertible notes that reach maturity without a qualified financing create a repayment obligation that can force an unfavorable negotiation with noteholders or trigger a default that accelerates all outstanding notes simultaneously. This is not a theoretical edge case. It is a scenario that closing attorneys and early-stage advisors encounter regularly, and the note's maturity provisions need to be negotiated thoughtfully at the outset rather than revisited in a position of weakness.
Allowing maturity timelines to approach without a clear path forward is a serious founder risk. A note approaching maturity without a qualifying financing event forces a negotiation the founder may not be positioned to win — repayment, extension, or conversion at unfavorable terms.
The closing day: what actually happens
When a qualified priced round closes, the conversion happens across several coordinated steps. This is where the abstract mechanics become concrete operational work, and where the professionals at the table — closing attorneys, company counsel, lead investor's counsel, and cap-table administrators — earn their place in the process.
- Final conversion scheduleCompany counsel builds a reconciliation for every outstanding convertible note: principal, interest accrued to the closing date, applicable cap or discount, resulting conversion price, and share count. This schedule must be agreed by all relevant parties before any documents are signed or any funds move.
- Closing documentsA priced equity round, like a Series A, is a highly structured event. It typically involves a single closing day where all investors sign the documents and wire their funds simultaneously. The convertible notes, though issued months earlier, are formally extinguished at this moment. The note instrument ceases to be a debt obligation; it is replaced by preferred stock on the cap table.
- Share issuanceThe investor receives preferred shares at the conversion price determined by the note's terms. In most cases this is the same class of preferred stock issued to the new round's investors, though when conversion prices diverge significantly, some companies issue a separate sub-series to avoid liquidation-preference distortions — a structuring decision that the attorneys will have addressed in the term sheet phase.
- DisbursementNew round capital arrives from the new investors. The company receives it, the notes are cancelled, and the cap table reflects the fully converted ownership structure for the first time. This is the moment of settlement — every prior debt relationship resolves into equity in a single coordinated event.
The disbursement step is where complexity multiplies in proportion to the number of parties. A Series A with a lead and two follow-on investors, converting four outstanding notes held by seven individual angel investors, each with different accrual start dates and at least two different cap levels — that is not an unusual scenario. The closing attorney manages a disbursement waterfall where the sequence and accuracy of each calculation must be verified before wires are sent and shares are issued.
How onchain payment routing fits into this settlement event
The conversion of notes into equity is a legal event. The flow of funds on closing day — new investor capital wired to the company, legal fees disbursed to counsel, pro-rata allocations processed for noteholders exercising their rights — is a financial event with settlement risk attached to every wire.
In traditional closings, the closing attorney manages wire instructions manually, disbursing from a trust account in sequential steps. A directive for disbursement is a written set of instructions that tells the closing attorney exactly who gets paid from the money held for the closing, how much, and when. The settlement agent holds closing money in a trust or escrow account and must disburse it only as approved by the parties as part of the settlement agreement. It also helps prevent mistakes and reduces the risk of wire fraud by creating a clear, signed authorization for each outgoing payment.
The problem is not intent. Settlement agents are meticulous professionals who take their disbursement obligations seriously. The problem is infrastructure. A sequential wire process introduces latency between the first payment and the last. Parties at the end of the queue wait hours — sometimes days — for confirmation. In a multi-party closing involving legal counsel, investors, the company, and third-party service providers all expecting payment on the same day, that sequencing creates anxiety, follow-up calls, and, in the worst cases, closing-day failures when a wire is delayed or misdirected.
This is precisely the settlement problem that shaka.deal is built to solve. Rather than sequential disbursement from a central account managed by one party, shaka.deal routes the total incoming amount and distributes it simultaneously to every party at preset shares — in a single transaction, with onchain finality. One payment in, every payee receives their correct allocation at the same moment. The transaction is final: onchain payments cannot be reversed, creating a certainty of settlement that no wire-based process can replicate.
For the closing attorney managing a convertible-note conversion event with multiple payees — company counsel, lead investor counsel, pro-rata noteholders, the company treasury itself — shaka.deal does not replace any party's role. It replaces the friction of sequential disbursement with the certainty of simultaneous settlement. The attorney still directs the transaction, confirms the allocation schedule, and signs off on the disbursement instruction. The routing happens onchain, instantly, to every party at once.
The spine of what shaka.deal does — split, instant, certain — maps directly onto the demand that a multi-party closing creates. Every closing involves a defined split. Every party wants it to be instant. And every professional in the room wants it to be certain. Finality is not an optional feature at the closing table. It is the whole point.
What professionals need to track before the round closes
For attorneys, founders, and deal advisors managing a company into its first priced round, the convertible note stack deserves ongoing attention — not just a last-minute audit. Specifically:
Interest accrual tracking. Every note has a clock running. Post-closing, the company needs to track accruing interest and monitor proximity to the maturity date, since many notes include provisions that give investors significant rights if the note is not converted or repaid on time. The interest schedule should be modeled continuously, not assembled for the first time by closing counsel on the day the round prices.
Cap table modeling at multiple valuations. A low cap on a pre-seed note can look reasonable in isolation — but if the company's trajectory outperforms expectations, that cap creates a large ownership transfer at conversion and compresses the effective valuation for Series A investors. Model cap scenarios against a range of future valuations before agreeing to terms, not after.
MFN clause auditing. Before a round closes, every note in the stack needs to be checked for MFN provisions. An MFN in a convertible note may be limited to conversion economics, in which case a subsequent note with a lower cap or higher discount triggers the right. Alternatively, a broadly drafted MFN may extend to all material economic terms, including the interest rate, the maturity date, and any conversion premium applicable upon a change of control.
Qualified financing threshold confirmation. The round must meet the trigger definition in each note. If tranches are involved, confirm that the aggregate or initial tranche clears the threshold before assuming conversion is automatic.
Disbursement schedule preparation. Every closing payee, every amount, every wire instruction — finalized before the first document is signed. This is where shaka.deal's routing infrastructure turns a multi-step, error-prone disbursement process into a single, auditable, simultaneous settlement.
The professional's perspective
The convertible note is an elegant instrument when used and managed correctly. It serves founders by deferring valuation negotiation to a moment when the company has real evidence to support a price. It serves investors by giving them a legally senior position during the bridge period and rewarding them with meaningful share count at conversion. It serves closing professionals by providing a defined conversion event around which a closing can be structured cleanly.
What it demands, from every party, is precision. The mechanics matter before signing. Caps, discounts, maturity dates, and accrued interest can all affect ownership, investor negotiations, and the company's ability to raise its next round. That precision does not disappear at conversion — it intensifies. The closing day is when every approximation in the note documentation becomes a number that must be exactly right before equity is issued and capital is disbursed.
A properly drafted and executed convertible note protects the investor's right to convert at favorable terms, protects the company from unlimited repayment demands at maturity, and gives both parties a clean, documented record that integrates directly into the cap table and due diligence package when the next round closes.
The professionals who manage that process — the closing attorneys, company counsel, cap-table administrators, and settlement agents — are the ones who make it work. The instruments are only as reliable as the people who document and settle them. When the round finally closes, and the notes convert, the goal is a clean cap table and a settled disbursement that every party can confirm in real time. That is a goal worth engineering carefully, with every tool available — including onchain payment routing through shaka.deal.
