Our fictional angel is agreeable. She will wire $250,000 before you settle on a valuation cap. All she wants is an MFN. Everyone is relieved that the difficult conversation has moved into three initials.
Most Favored Nation sounds like a permanent diplomatic upgrade. In a contract, it is a defined process. What triggers it, what can be adopted, and what happens after the election matter more than the reassuring name.
The provision on the table
Fictional sequence: an early investor wires $250,000 on an uncapped MFN SAFE. The company later issues a cap-only SAFE. Notice and a copy are delivered; the early investor makes a timely written election into that later instrument.
Our explanatory wording, not a quotation or modification of a YC form. Open a margin note:
What this means
The modeled investor adopts the later instrument as a package. A lower cap appearing in the ledger is not itself an election.
What works for you
The early check can close before a cap is agreed. The investor can receive specified later convertible terms through the notice-and-election process.
Where it can bite
Missed notices, missed deadlines or misunderstood replacement terms can leave the parties expecting different contracts.
If you do not ask
Who sends notices, who monitors receipt, what is the election deadline, and which instruments and terms actually qualify?
Inside the investor’s head
Early money buys an option to follow later terms. That option needs administration; it is not unlimited cherry-picking.
In the current US YC uncapped MFN form, a qualifying subsequent convertible instrument prompts notice and a copy. The investor can make a written election within ten days after receiving that notice. The SAFE is then amended and restated to match the later instrument. It is a package, not a buffet of isolated favorable clauses. 1
The SAFE Stack separates notice from election. Issuing a later capped SAFE changes the available choice. It does not, by itself, mean the earlier contract has been replaced. An unattended inbox is not a pricing formula.
“Subsequent convertible securities” also has a definition and exclusions. Do not assume it means every side letter, employee option or bank loan. A later convertible note may raise different questions from a later cap-only SAFE. Have counsel compare the actual instruments.
An attractive cap can arrive with less attractive company
Imagine the company issues $500,000 at a $6 million cap. Our early MFN holder likes the cap and elects into the same cap-only instrument. Her $250,000 now has a cap-based estimated ownership of roughly 4.17% before priced-round cash, subject to the conversion definitions.
Now imagine the later instrument contains negotiated restrictions the early investor dislikes. The current form’s mechanism is not “keep everything from my old agreement and take only your new price.” The investor needs to understand the replacement. The founder needs to know whether the election also ends the old MFN mechanism by adopting a form that no longer contains it.
The future can produce a better bargain after you have exercised an option. That does not mean your original option survives every replacement. In our tool, election adopts the last listed cap-only instrument once; further elections and revised instruments are outside the model.
The contract before the election
Leave our early MFN unchanged. In a priced financing it converts at the new investors’ lowest price under that form’s financing provision. No agreed cap suddenly appears because someone called the check “early money.” 1
In a sale before conversion, the current unamended MFN form has a purchase-amount cash claim, rather than the cap-only form’s greater-of cash or as-converted route. Importing the cap-only sale formula into an MFN spreadsheet can invent upside the signed instrument does not provide. 12
The holder who expected a permanent best-of-all-worlds instrument may discover she has a simpler one. The founder who expected the same rights across every SAFE may discover the opposite.
Administration is part of the economics
Assign a person to the notice process. Keep delivery, receipt, deadlines, copies and written elections with the signed instruments. Resolve whether an amended SAFE remains eligible for later elections. Do not replace those questions with a cap-table label that says “MFN.”
A founder can ask to narrow the qualifying universe or negotiate the mechanism. An investor can ask for reliable notices. Changes to the form are negotiations, not clerical cleanup, and should be visible as such.
Our imaginary investment committee appreciates optionality. It is particularly fond of optionality someone else has to remember to administer. The email marked “for your records” is worth opening.