What a Convertible Note Cap Does to Your Ownership

The Cap Is Not a Valuation - But It Acts Like One

I see this constantly - founders treating the convertible note cap as a placeholder. A number you throw out to satisfy the investor and move on.

That's a mistake that shows up later - at Series A - when you finally see what you gave away.

The valuation cap sets the maximum valuation at which your convertible note converts into equity. If your company grows past that cap before the next round, the early investor converts as if the company was still worth the capped amount. They get more shares. You get more dilution.

A ceiling on how favorably the investor converts. In practice, it functions as a proxy for your company's value at the time of the note - and investors know it.

How the Math Works (With Real Numbers)

You raise a $100,000 convertible note with a $5 million valuation cap and no discount. Six months later, you close a Series A at an $8 million pre-money valuation.

Without the cap, your note converts at $8 million - the round price. With the cap, it converts as if the company is worth $5 million. The investor gets shares at $1 per share instead of $1.60 per share. They receive 60% more shares for the same $100,000.

Scale that up to a $500,000 note with a $10 million cap, and your company raises a Series A at $50 million. Without the cap, that note converts at $50 million and the investor gets a small slice. With the cap, the note converts as if the company is worth $10 million - giving the investor five times more shares than they would have gotten otherwise.

That's the cap doing its job. For the investor, it's excellent protection. Dilution compounds across every note in the stack.

What the Discount Does Differently

The cap is one conversion mechanism. The discount is another. A 20% discount means the note converts at 80% of whatever the next round's price per share is - regardless of valuation. So if your Series A prices shares at $1.00, a note with a 20% discount converts at $0.80.

When a note has both a cap and a discount, whichever is more favorable to the investor applies. The investor picks the lower conversion price. In a $25,000 note with a $5 million cap and a 20% discount, if your Series A comes in at a $10 million pre-money valuation with shares at $5.00 per share - the cap math gives a conversion price of $2.50 while the discount math gives $4.00. The cap wins. The investor converts at $2.50 and ends up with 10,000 shares on paper worth $50,000 - a 100% unrealized return on $25,000 invested.

Every convertible note I've reviewed in the last few years has come in at a 20% discount. According to Aumni market data, notes in their dataset carry a 20% discount rate with relative consistency over time.

What Normal Cap Numbers Look Like Right Now

Founders ask this constantly: what's a reasonable cap?

The Wilson Sonsini Entrepreneurs Report - which tracks deals the firm closed - found the median valuation cap in pre-seed convertible notes was $35 million, and $50 million for post-seed notes.

Carta's pre-seed data tells a more granular story. For pre-money convertible note rounds under $250,000, the median valuation cap has reached $7 million. For SAFE rounds under $250,000, the median cap is now $7.5 million - up from $6.5 million the prior quarter. Healthtech pre-seed startups raising $2.5 million or more are seeing median caps of $35 million.

According to Carta's Q1 data, the median interest rate on convertible notes held steady at 7% - down from a high of 8% the prior year. Aumni's dataset shows interest rates climbing from 5.9% to as high as 9.5% before pulling back to around 7.5%.

These numbers vary by stage, sector, and geography. Crypto, biotech, and hardware startups tend to carry higher caps because investors expect those companies to grow faster and raise at larger valuations.

The Cap-Too-Low Problem Founders Don't Model

I see this constantly - founders setting their cap at or below what their company is already worth, especially under pressure to close a round quickly.

One documented example: a startup set a $4 million cap when their implied valuation was already $4 million. There was no room for the cap to do its job. Any growth before the next round meant the investor received an increasingly large chunk of the company at conversion.

A practical rule: set your cap at 1.5x to 2x your current implied value. If your company is worth roughly $5 million based on revenue multiples or comparable deals, your cap should be $7.5 million to $10 million. If you then grow 3x before Series A, a $10 million cap means real dilution - a $5 million cap means severe dilution.

The problem compounds when founders stack multiple notes with different caps. One startup attorney documented a case where a founder took three convertible notes over 18 months: $200,000 at 5%, $150,000 at 6%, and $100,000 at 5%. By Series A, the aggregate principal grew from $450,000 to approximately $480,000 from accrued interest alone - an extra $30,000 in equity being issued that the founder never planned for.

Misaligned caps across notes make your cap table messy. Future investors see this and lose confidence before they even run the dilution math.

When the Note Converts Below the Cap

The cap sits unused more often than founders expect. If your next round comes in at a valuation lower than the cap, the cap goes unused entirely. The note converts at the round price, just like a new investor. The cap only kicks in when your valuation exceeds it at conversion.

This means a high cap is not always a concession. If you're confident your valuation will stay below the cap until Series A, the cap is protective language that never gets used.

Your company does well, the cap is low, and your early investors receive far more equity than you or your Series A investors anticipated. Incoming investors may perceive their investment as less attractive because the early note holders are getting a better deal per dollar. This can complicate your raise.

SAFEs Versus Convertible Notes on the Cap Table

The cap mechanism works the same in SAFEs (Simple Agreements for Future Equity) as in convertible notes. The difference is structural. SAFEs are equity-like instruments without maturity dates or interest. Convertible notes are debt carrying interest, maturity dates, and security interests.

Carta's data shows SAFEs now make up 90% of all pre-seed rounds, with convertible notes at 10%. SAFEs have taken over even in sectors that historically favored notes - including biotech, pharma, and medical devices.

With SAFEs, there is no maturity clock ticking. With convertible notes, the 18-to-24-month maturity window creates pressure. If you haven't raised a qualified round by then, the company technically owes the investor their principal plus accrued interest in cash - which most early-stage companies cannot pay. That leads to forced renegotiation, often at terms worse than the original note.

What Founders Negotiating Right Now Are Doing

In every note round I've worked through, the advice is the same: prioritize the cap above everything else in negotiation. The cap is where the investor's upside protection lives. It's what determines dilution at Series A. Interest rate, maturity date, and discount are secondary concerns.

Experienced founders push hard on the cap and are willing to give slightly on interest rate or extend the maturity date to get a higher one. That trade-off is often worth it. A 1% higher interest rate on a $200,000 note is $2,000 a year. A cap that's $5 million too low can cost 5 to 10 percentage points of ownership at Series A.

If you're taking multiple notes from different investors, standardize the terms. Same cap, same discount, same interest rate, same maturity date. Three notes with three different caps signals to future investors that your cap table management is poor.

One thing founders consistently underestimate: model the conversion before you start Series A conversations. Know exactly what your cap table looks like after every note converts at the anticipated Series A valuation. Investors will ask. If you can't answer instantly, confidence erodes.

The Signals a Cap Sends

A cap that's too low signals something to future investors: either the founder gave away too much, or the company didn't grow as expected. Both create problems.

A cap that's too high - higher than the eventual pre-money valuation at the next round - also sends a message. It suggests the company didn't hit the growth trajectory the original note implied.

The cap functions as an informal track record. It's a number that reveals what both parties thought the company was worth when the note was signed. Sophisticated investors read it as a data point on founder judgment, not just as a mechanical conversion term.

If you're building a fundraising strategy around multiple note rounds before your first priced equity, this signaling effect compounds. Every cap you set leaves a trail that tells the story of how fast you grew - or didn't.

A Practical Checklist Before Signing

Before you sign any convertible note, run through these:

• What is the current implied valuation of your company? Is the cap at least 1.5x to 2x that number?
• Does the note have both a cap and a discount? Which one does the investor prefer to apply?
• Have you modeled the cap table after conversion at multiple potential Series A valuations - not just your optimistic target?
• If you're stacking notes, are the caps and discount rates identical across all of them?
• What is the maturity date, and what happens if you don't raise a qualified round in time?
• Have you accounted for accrued interest in your dilution model?

None of this requires a lawyer to answer in the first pass. It requires a spreadsheet and thirty minutes of honest math before you're sitting across the table from someone writing you a check.

If you want to build the kind of investor network that lets you negotiate these terms from a position of strength - rather than desperation - the work starts well before the round opens. The founders who get favorable caps aren't the ones who ask nicely. They're the ones who had enough inbound momentum that the cap negotiation wasn't the deciding factor in closing the deal.

If you're working on the outreach and positioning side of your raise, Learn about Galadon Gold - direct coaching from operators who have built and sold businesses and understand how fundraising positioning changes the terms you're able to negotiate.

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