Raising early capital is often about speed and simplicity. That’s why many founders turn to SAFEs or convertible notes instead of priced equity rounds. They’re faster, cheaper, and avoid valuation debates when the company is still finding product-market fit. But these instruments aren’t interchangeable. Founders and their CFOs need to understand the structural differences, the implications for the cap table, and the long-term consequences that are often overlooked in the rush to close a round.
Here’s what separates SAFEs from convertible notes, and the pitfalls that catch companies by surprise.
- SAFEs Are Not Debt. Convertible Notes Are.
The first distinction is structural. A convertible note is debt. It accrues interest, has a maturity date, and may require repayment if it is not converted before maturity. A SAFE (short for Simple Agreement for Future Equity) is not debt. There’s no interest, no repayment obligation, and no maturity date.
This can make SAFEs more founder-friendly on the surface. But the lack of a maturity date also means there’s no deadline pushing a conversion event, which can create uncertainty for investors if the company stalls on raising a priced round.
- Interest and Maturity Terms Can Add Pressure
Convertible notes typically accrue interest, usually between 4% and 8%, which is added to the principal and converted to equity during a priced round. They also include a maturity date, often 18 to 24 months, which puts pressure on the company to convert or repay.
If a company doesn’t raise a qualifying round by maturity, investors could demand repayment or renegotiate terms, which isn’t always feasible. SAFEs avoid this dynamic, but that’s not always a positive. Some investors may insist on notes to create leverage if the company’s growth slows.
- Valuation Caps and Discounts Work Similarly, But Not Identically
Both SAFEs and convertible notes usually include a valuation cap, a discount, or both. These features reward early investors by letting them convert at a lower price per share when the priced round occurs.
However, the math behind conversion can vary slightly between the two instruments depending on the terms. Founders often overlook the interaction between different interpretations of the cap and discount, especially when multiple instruments with varying terms are issued over time. Without modeling these scenarios, founders risk unexpected dilution.
- SAFEs Can Stack More Aggressively on the Cap Table
Because SAFEs don’t accrue interest and don’t mature, they can accumulate quietly on the cap table. If a company raises multiple SAFE rounds without converting them to equity, the ownership pie shrinks more than founders expect when the priced round finally triggers conversion.
Convertible notes, at the very least, demonstrate a growing repayment obligation, which makes the dilution risk more visible. Companies using SAFEs must be proactive in tracking the number of outstanding SAFEs, their caps, and the implications for ownership once they are converted.
- Legal Complexity Isn’t Always Lower with SAFEs
There’s a perception that SAFEs are simpler than convertible notes. They are shorter documents, but that doesn’t automatically make them easier to manage. If a company raises using multiple SAFEs with different terms, such as varying valuation caps or discount rates, it creates complexity when modeling ownership and drafting conversion mechanics in the priced round.
Convertible notes, while longer, can provide more structure around conversion, interest, and investor protections. SAFEs, on the other hand, can introduce ambiguity if the documentation isn’t consistent across issuances.
- Post-Money SAFEs Changed the Dynamics
Y Combinator’s introduction of the post-money SAFE standardized how these instruments affect ownership calculations. Post-money SAFEs provide investors with a fixed percentage of ownership based on the cap, making dilution outcomes more predictable for the investor.
However, this means founders bear a greater share of the dilution risk. If you’ve issued post-money SAFEs to multiple investors, your remaining ownership can shrink faster than expected, especially if you didn’t model the cumulative impact correctly.
- Don’t Skip Professional Valuation Modeling
Founders often assume they can “clean up” the cap table later, but this mindset can lead to surprises during a priced round or M&A event. You should model cap table outcomes before issuing any SAFE or convertible note, especially if previous rounds had varying terms.
CFOs and GCs should ensure the company understands not only the headline valuation cap, but also the combined impact of all outstanding instruments, interest accruals (for notes), and the interaction between discounts and caps across multiple rounds.
Understand Your Funding Tools Before You Use Them
SAFEs and convertible notes each have their place, but the decision shouldn’t be made just because one feels easier or cheaper. The long-term impact on ownership, control, and exit outcomes is real and often underestimated in the early stages of development.
Ivory Law Group helps growing companies assess, structure, and negotiate financing tools that align with long-term goals. If you’re planning to issue SAFEs or notes, or if you’re trying to clean up a messy cap table before your next raise, contact us.
Disclaimer: The content provided in this blog is for informational purposes only and does not constitute legal advice. Reading this blog does not create an attorney-client relationship with Ivory Law Group or any of its attorneys. For legal advice, please consult with a qualified attorney directly.
Ivory Law Group
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