The Convertible Note Trap: What Happens When Nobody Prices The Round

A convertible note is meant to be a bridge to a priced round. It's not supposed to be a permanent home for your company's capital. But plenty of founders stack note after note for years without ever pricing a round.

Then a lead investor finally shows up, asks what the stack converts into, and the founder finds out, at the worst possible moment, how much of the company is already spoken for. I've seen that look across the table. You don't want to wear it.

What Is A Convertible Note?

A convertible note is a loan that's designed to turn into equity later, usually at your next priced round. Instead of setting a valuation now, the investor lends you money on a few key terms:

• Valuation cap: the maximum valuation at which the note converts.
• Discount: a percentage off the price new investors pay, often 10% to 25%.
• Interest: accrues over time and usually converts into shares along with the principal.
• Maturity date: the date the note comes due if it hasn't converted yet.

The note typically converts at whichever is better for the investor, the cap or the discount. Each note on its own is simple. The trap is in the stack.

Why Does Stacking Convertible Notes Get Complicated?

Each note carries its own cap, discount and interest. Raise several at different times on different terms, and converting them all into one priced round means reconciling terms that were never designed to work together.

Founders who raise opportunistically, taking a note whenever a check shows up, often don't see how much of the company those notes represent together until someone runs the conversion math. Usually that's the investor deciding whether to lead your priced round.

What Does A Note Stack Actually Convert Into?

Here's a hypothetical stack of three notes, converting into a priced round at a $10M pre-money valuation. I'm ignoring interest for the moment to keep the math clean.

The math on Note 1: the cap is $3M against a $10M round, so the investor pays 3 / 10 = 30% of the round price. The discount would have them pay 80%. They take the cap. $150K divided by 0.30 buys what $500K buys for new investors.

Now add interest. At 6% simple interest over two years, Note 1's $150K becomes $168K, and $168K / 0.30 converts like $560K. So $700K of notes can hit your cap table like more than $1.4M of new money once every note's interest is counted, before the lead investor puts in a dollar. Exactly how much ownership that represents depends on whether your notes convert on a pre-money or post-money basis, so have your startup attorney or accountant confirm the model.

Who Is A Convertible Note Actually For?

Before you model anything, ask who's holding the paper. Sophisticated, experienced investors are comfortable with notes. They know the maturity date is leverage for them and the interest is a sweetener, not the point.

Newer angels and high-net-worth individuals are a different story. To many of them, a note is debt that isn't really debt and equity that isn't really equity, with a deadline nobody explained. They want to know what they own and what it's worth. A note answers "later," and a lot of them quietly pass rather than admit the structure makes them uneasy.

That doesn't make the note the wrong tool. It means your investor pool shrinks when you pick it, and a stack makes that worse, because every new investor has to understand the whole stack before saying yes. A priced round will usually draw more interested investors. SAFEs have their own version of this problem, which I cover in the good and bad news about SAFEs. If you choose notes anyway, choose them on purpose.

The Objection: "Notes Are Supposed To Be Simple. Isn't This Overthinking It?"

Aren't notes designed to avoid this complexity until a priced round happens?

Each individual note is simple. The complexity comes from stacking several with different terms across time without ever modeling how they interact. That's a founder-created problem, not a flaw in the instrument. Model the stack from the first note, not the third, and the instrument stays as simple as it's supposed to be.

Two Hypothetical Companies, Three Notes Each

Consider two hypothetical companies. Company A raises three notes over two years with different caps and discounts and never models the combined conversion. When a lead investor asks for it, rebuilding the math takes three weeks and shows the founders will own far less than they assumed. The negotiation starts on the back foot.

Company B raises a similar stack but updates a simple conversion model after every note. When the priced round arrives, the founders produce the combined conversion within the hour and negotiate from a position of knowing their own numbers cold.

What A Clean Conversion Requires

1. Know, at any moment, what percentage of the company all outstanding notes would represent if they converted today, under their actual terms.
2. Update the model every time you add a note, instead of rebuilding it from memory later.
3. Track maturity dates, and know what happens if a note matures before a priced round.
4. Show the model on your cap table alongside everything else. Here's how investors read a cap table.

A founder who can produce this model on request signals operational discipline. A founder who needs weeks signals the opposite, right when the impression matters most.

What To Do This Week

If you have more than one outstanding convertible instrument, build the combined conversion model this week, before an investor asks for it under time pressure. Then have your attorney check it. Building that model is part of getting investor-ready in The Raise Academy, because the math doesn't get easier by waiting.

Key takeaways

• Each note is simple; a stack with different terms is where founders get hurt.
• Low caps and accrued interest can make a small note convert like much more money.
• Model the combined conversion after every note, not when the lead investor asks.

Frequently asked questions

How does a convertible note convert into equity?

At the next priced round, the note's principal and usually its accrued interest convert into shares. The investor typically gets the better of the valuation cap price or the discounted round price. Exact mechanics vary by note, so confirm yours with a startup attorney.

What happens if a convertible note reaches maturity?

It depends on the note's terms. Holders may be able to demand repayment, convert at a set valuation, or agree to extend the maturity date. Because the maturity date gives investors leverage, read the clause closely and plan ahead with your attorney.

Is a convertible note better than a priced round?

Not always. Notes can be faster and work fine with sophisticated investors, but many newer angels and high-net-worth individuals prefer a priced round because they want a clear price and ownership. Choosing notes can shrink your pool of interested investors.

Mike Nathan

Founder & CEO, Impero Ventures · Founding Partner, Exit 156 Capital

20+ companies. $170M revenue. $55M raised. 3 exits. 2 VC funds. 1M+ YouTube subscribers.

He doesn't just pitch investors. He founded two venture capital funds.

More about Mike →