MFN Clause (MFN)

TL;DR

A 'Most Favored Nation' provision letting an early investor automatically adopt better terms offered to any later investor on the same instrument.

An MFN clause in a SAFE or convertible note gives the early investor the right to elect terms granted to any subsequent investor on a similar instrument. If a later SAFE has a lower cap, a higher discount, or other better economics, the MFN holder can swap their terms in.

MFN clauses protect early investors from being undercut by later, friendlier deals — but they also make the cap table unpredictable. Founders who issue too many MFN-bearing SAFEs lose the ability to negotiate flexibly with later check-writers.

Worked example

A founder issues 6 SAFEs over 9 months — the first 3 at $8M cap, the next 3 at $10M cap. SAFEs 1–3 with MFN clauses get to elect into the $10M cap if it's better; in this case it isn't (the $8M cap is cheaper to the holder), so they keep their original terms.

Common pitfalls

• Issuing MFN clauses without tracking who holds them.
• Underestimating how MFN propagation cascades through subsequent rounds.
• Not consulting counsel before agreeing to a non-standard MFN.

When this shows up in a pitch deck

MFN matters in term-sheet negotiation, not deck content.

See MFN Clause in context

MFN Clause shows up most often in these scoring rubrics and investor profiles — jump straight to who cares about it and how to pitch them.

For investor types

• Strategic Investor — Partnership Capital

Related terms

• SAFE — Y Combinator's Simple Agreement for Future Equity — a contract that gives an investor the right to equity in a future priced round, with no debt or interest.
• Convertible Note — Short-term debt that converts into equity at a future priced round, typically with a discount, a valuation cap, and an interest rate.
• Valuation Cap — The maximum company valuation at which a SAFE or convertible note will convert into equity, protecting early investors from dilution at high prices.
• Discount Rate (Convertible) — The percentage discount a convertible note or SAFE holder receives off the next priced round's price per share.
• Term Sheet — A non-binding document outlining the principal terms of a proposed financing, used to align investor and founder before legal documents are drafted.

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