In practice
The MFN right usually sits in a side letter, and the manager typically delivers a disclosure of other side letters after the final close, giving a short window to elect. Carve-outs are common: LPAC seats, regulatory or tax-driven terms, and rights tied to an investor’s legal status are often excluded. It is often confused with fee discounts tied to commitment size.
An example
Round numbers, not a real fundSay a manager gives a $100 million investor a fee discount. A $50 million investor with an MFN clause can usually elect that discount too, if the terms are open to it.
Why it matters
It is how investors make sure a bigger or earlier investor cannot quietly get a better deal than they do.
A definition, not advice; where usage varies the entry says so. Something wrong? Tell the desk.