Loaning a player - playing/non-playing fee - how is this defined?

[jayahr]

Hi all,

this is really something I asked myself for years... does anybody know?

When you negotiate loan fees for playing / non-playing, how is it defined which one applies? Is it about the majority of matches? Of minutes? Is it calculated pro rata, per appearance? Does it matter if a player starts or if he's subbed in? Something else?

I really have no clue...