Early rounds are frequently raised on convertible instruments because they avoid the negotiation nobody wants to have. The negotiation is deferred rather than removed, and it returns with interest attached.
The instrument exists to avoid pricing the company
Valuing a company with little history is largely guesswork, and both sides know it. A convertible note or safe lets money move now and settles ownership later, when a priced round provides a number.
That saves legal cost and time at a stage where both are scarce, which is a genuine advantage rather than a trick.
What it does not do is remove the question. It records a claim on future equity whose size depends on a price that has not been set.
Discounts and caps determine the eventual dilution
Most instruments carry a discount to the next round's price, a valuation cap, or both, and conversion typically uses whichever is more favourable to the investor.
A cap set low relative to the eventual priced round means those early dollars convert into a much larger share than their nominal amount suggests.
Founders modelling dilution from the headline amounts raised, rather than from the conversion mechanics, consistently understate how much of the company has already been committed.
Stacked notes interact in ways that are hard to see
Companies often raise several times on notes before a priced round, each with different caps and terms agreed under different conditions.
At conversion they all resolve simultaneously against a single price, and the combined effect is not obvious from any individual document.
Building a conversion model early, and updating it with each instrument signed, is what makes the accumulated position visible while it can still be managed.
The next round prices everything at once
When a priced round arrives, the new investor negotiates a post-money ownership target that includes converting holders and any option pool expansion.
Because the pool is usually created before the money goes in, its dilution falls on existing holders, which is the point in the process that surprises founders most often.
All of these terms are negotiable and interact, so the headline valuation on its own describes very little about the outcome.
Maturity dates are rarely the real deadline
Notes carry a maturity date, and reaching it without a priced round technically makes the note repayable, which few early companies could do.
In practice maturities are commonly extended, because investors generally prefer conversion to forcing a repayment the company cannot make.
The dependence is nonetheless real: an extension requires the holders' agreement, and that agreement is negotiated from a weaker position than the original raise. This is a description of how the instruments work, not advice on which to use, and specific terms warrant review by counsel.