--- title: "Convertible Instruments: The Unowned Layer of the Cap Table and How It Reaches Price" description: "Where conversion trigger, discount rate, valuation cap and interest accrual are not modeled together, convertible instruments obscure the true dilution picture behind the cap table. Diligence counterparties do not test whether the documents exist; they test whether the fully diluted ledger reconciles line by line to the note economics. Absent that reconciliation, the gap is priced through consideration, escrow percentage and closing conditions." url: https://www.beirek.com/en/blog/convertible-notes-cap-table-diligence canonical: https://www.beirek.com/en/blog/convertible-notes-cap-table-diligence published: 2026-08-20 modified: 2026-08-20 category: "Ownership & Cap Table" category_url: https://www.beirek.com/en/blog/category/ownership-cap-table language: en-US reading_time_minutes: 8 publisher: BEIREK LLC publisher_url: https://www.beirek.com license: "© BEIREK LLC — citation with attribution and link permitted" keywords: ["convertible notes","fully diluted cap table","valuation cap and discount","qualified financing threshold","MFN clause dilution","investment due diligence"] topics: ["Cap table governance and equity administration","Convertible instrument economics and conversion mechanics","Valuation diligence and closing risk allocation"] alternate_language_url: https://www.beirek.com/tr/blog/convertible-notes-cap-table-diligence --- # Convertible Instruments: The Unowned Layer of the Cap Table and How It Reaches Price > **In short:** Where conversion trigger, discount rate, valuation cap and interest accrual are not modeled together, convertible instruments obscure the true dilution picture behind the cap table. Diligence counterparties do not test whether the documents exist; they test whether the fully diluted ledger reconciles line by line to the note economics. Absent that reconciliation, the gap is priced through consideration, escrow percentage and closing conditions. *A convertible note is a financing instrument on the day it is signed and an ownership decision on the day it converts; in the interval between those two dates, neither accounting nor the cap table fully takes custody of it. That custody gap surfaces in diligence through a single question, and it moves the direction of the price negotiation.* --- In an investment meeting, one of the first technical questions asked after the cap table file appears on screen is almost invariably the same: is this table fully diluted, and does the dilution shown include instruments that have not yet converted? The answer typically arrives in two stages — an unhesitating yes from the founder, followed several days later by an email that revises the table. What produces the gap between the two is not an absence of knowledge, since the founder is entirely aware that the notes exist; what produces it is the distance between a note sitting in an archive as a legal document and the same note living in a table as an ownership position. That distance originates in the nature of the instrument itself: a convertible belongs to the balance sheet on the day it is signed and to the share register on the day it converts, and in most companies the question of which function is obliged to keep it current during the interval has never been settled at all. A second observation concerns not the existence of the note but the frequency with which its text is read. A convertible is negotiated intensively in the week it is signed — discount rate, valuation cap, maturity, whether interest is paid in cash or capitalized, the qualified financing threshold, each debated in turn — and after signature the document is typically never opened again. The economic effect of these instruments, however, does not materialize at signature; it materializes eighteen months later, at an entirely different negotiating table. Over that interval the company's budget, product and sometimes corporate structure will have changed while the assumptions embedded in the note remain fixed, and the divergence between the conditions under which the note was drafted and the conditions under which it is triggered is, more often than not, discovered in the final two weeks before closing. The mechanism operating beneath this pattern is that accounting and equity administration run on different time scales. Accounting carries the convertible as a liability and accrues interest against it; that treatment is correct, regular and auditable, and it says nothing whatsoever about dilution. The cap table, by contrast, tracks converted instruments and admits an unconverted note only as a footnote; that treatment is also correct, and it does not display the company's real ownership distribution. The space between the two record-keeping systems is not the product of bad faith but of how responsibility has been defined: finance sees a liability, counsel sees a contract, the founder sees a closed negotiation, and none of the three carries the instrument as a live capital position. The second layer of the mechanism is that conversion terms are variables that compound one another. Where a discount rate and a valuation cap apply simultaneously, which of the two governs depends on the price of the round; where interest is capitalized, the converting principal grows over time and dilution drifts away from the fixed percentage held in the founder's mind; where the qualified financing threshold is defined by reference to a minimum round size, a bridge that falls below the threshold does not trigger the notes at all and the position is carried for another period. Each of these variables is intelligible on its own. Operating together, they produce an outcome that becomes visible only inside a model, and until such a model exists, the divergence between the dilution figure the parties hold in mind and the dilution figure the notes actually impose is systematic and runs in one direction. The institutional cost appears first in the closing timetable. Where the diligence counterparty cannot reconcile the fully diluted table to the note texts line by line, it instructs its own counsel to perform that reconciliation, which means an additional working week and the advisory cost corresponding to it — though the real cost is not the time but the psychological footing of the negotiation. From the moment an item requiring correction is found in the cap table, the remainder of the review proceeds under a different assumption, and headings previously treated as routine — the option pool, founder vesting schedules, historical share transfers — are reopened with the same rigor. A single unreconciled line expands the scope of the entire exercise. The second cost registers directly in the price mechanics. Where dilution remains uncertain, the acquiring or investing party does not price that uncertainty at an expected value but at the outer scenario least favorable to itself, which means the pre-money valuation is constructed on the most aggressive reading of the notes, with the difference funded by the founder. Beyond that, cap table accuracy is typically the most tightly drafted heading in the representations and warranties — a misstatement concerning share ownership is, in most structures, carved out of the indemnity cap or secured by a separate escrow tranche. Uncertainty in the notes is therefore priced once in the consideration, a second time in the escrow percentage, and a third time in the list of conditions precedent. The third cost arises from rights the notes carry beyond capital. Convertible instruments frequently contain information rights, pre-emption rights, most-favored-nation undertakings and, occasionally, consent thresholds relating to future rounds; individually reasonable, these provisions in aggregate extend the consent perimeter of the next round across a broader group than the founder expects. An MFN clause can propagate the terms of a later, more favorable note backward across the entire series, so that dilution is computed not against the average of the notes but against the most favorable one among them. What the diligence counterparty is looking for, accordingly, is not whether the notes exist but how they relate to one another. The mechanism that neutralizes this tendency is not greater founder attentiveness but a record established at the drafting stage rather than at signature. A functioning structure has four separable components: first, every note enters the fully diluted table as its own line simultaneously with signature, with that line carrying its conversion assumption explicitly; second, the economics of the notes — discount, cap, interest mechanics, qualified financing threshold — are consolidated into a single model, and the model is run against at least three round scenarios; third, non-capital rights are collected in a separate obligations register, so that the question of whose consent the next round requires can be answered within a day; fourth, executed counterparts and all ancillary documents are held in a data room with defined access rights, independent of any founder's personal archive. In capital-intensive and multi-stakeholder structures, BEIREK builds this record not as a table but as an operating rhythm. In practice this means that every draft entering note negotiation is run through the existing model before it is signed, that conversion scenarios are tested against the round sizes contained in the company's own financing plan, and that the model output becomes a shared reference among founder, finance and counsel. The individual maintaining the record may change while the record itself stays in place; when a diligence counterparty can ask not who prepared the table but from which source it was derived, verification time contracts materially. On the rhythm side, reviewing the note portfolio quarterly and answering four questions at each review produces sufficient discipline in most structures: which notes are approaching maturity, where capitalized interest has brought the converting principal, whether the planned round size clears the qualified financing threshold, and whether the most recently signed note has altered the terms of earlier notes through an MFN provision. Such a review imposes no separate reporting burden; it attaches to the existing board cycle and its output remains a one-page dilution summary. What the measurement dimension seeks is not an elaborate indicator set but the ability to produce the same number by the same method at regular intervals. The continuity dimension tests whether this structure operates independently of the founder, and the test is straightforward: with the founder unreachable for a week, who can produce the reconciliation between the fully diluted table and the note texts, and from which file? Where the answer is a position and a source rather than a name, the continuity test is passed; where the answer is only a name, the diligence counterparty records that as a measurable indicator of founder dependency, and the consequence of that indicator ordinarily appears not in the headline multiple but in post-closing founder commitment conditions and in the tightness of the earn-out construction. A convertible instrument is designed, at the moment it is created, to defer valuation; what is deferred, however, is not merely the price but the decision as to how that price will be shared and among whom. The document recording that decision is written on the day of signature, while its consequence becomes visible only at the table of the following round, and what is discussed at that table is no longer what the note says but the extent to which the company carries its own ownership structure as an institutional record. Where a cap table yields the same answer with the founder absent from the room, the convertible remains a financing instrument; where it does not, the same instrument becomes a negotiating item that quietly sets the starting point of the discussion. ## Key Points - Because a convertible instrument is tracked as neither pure debt nor pure equity during the interval between signature and conversion, it is structurally disposed to producing an institutional ownership gap that no single function closes. - A fully diluted cap table that does not reconcile line by line to the discount, cap and interest mechanics written into the note texts will not be treated as verified in diligence, however complete the document archive may be. - Where the drafted definition of a qualified financing diverges from the structure of the round that actually occurs, the interpretive difference becomes an item that extends the closing timetable and raises the escrow percentage. - Information rights, pre-emption rights and most-favored-nation undertakings distributed across a note series typically widen the consent perimeter for the following round well beyond what the founder anticipates. - For as long as the note record lives in a founder's personal email archive, the continuity test fails, and that failure is priced as a valuation discount rather than resolved as a documentation matter. ## Questions ### How should a convertible instrument appear on the cap table? An unconverted note belongs in the fully diluted view as its own line, not merely as a footnote. That line should state its conversion assumption explicitly: the round size assumed, the pre-money valuation applied, whether the discount or the cap governs, and whether interest is capitalized. Presented otherwise, the table describes today's ownership accurately while describing future ownership in a way that misleads both sides of the negotiation. ### What issue arises most frequently around convertibles during diligence? The most common finding is not that notes are missing but that the economic terms in the note texts do not agree with the dilution table the company has provided. Capitalized interest enlarging the converting principal, a discount and a valuation cap applying simultaneously, and an MFN clause altering the terms of earlier notes are the three typical sources of that divergence. Once a divergence is identified, the scope of the review widens and the closing timetable extends. ### Through which channel does convertible uncertainty reduce valuation? Uncertainty is rarely priced through the multiple directly; it is priced through three separate channels. The investing party models dilution at the outer scenario least favorable to itself rather than at an expected value, and sets the pre-money accordingly. Cap table accuracy is typically the most tightly drafted representation, which raises the escrow percentage. Items requiring correction are then added to the list of conditions precedent, delaying access to consideration. ### Who should maintain the note portfolio, and at what interval should it be reviewed? Responsibility should attach to a defined position rather than to a named individual, with the source record held in a data room independent of any personal archive. A quarterly review cycle is sufficient in most structures. Each cycle answers which notes approach maturity, where capitalized interest has brought the principal, how the planned round size sits relative to the qualified financing threshold, and whether the latest executed note has altered prior terms. --- Source: https://www.beirek.com/en/blog/convertible-notes-cap-table-diligence Publisher: BEIREK LLC — https://www.beirek.com