A global club tournament cannot use a qualifying competition, because its candidates play in different continents on different calendars. Entry is therefore assigned rather than won in a single pathway.
Confederation quotas are the starting point
Places are distributed among the six confederations, weighted toward those whose club competitions are strongest and most commercially significant.
Within each quota, the confederation decides which clubs qualify, typically by awarding places to recent winners of its own continental competition.
The allocation is renegotiated whenever the tournament's format changes, and it is the most contested element of any expansion.
Ranking systems fill the remaining places
When a confederation has more places than recent champions, the balance is allocated by a club coefficient covering several seasons of continental results.
Ranking-based entry rewards sustained performance rather than a single title, which is why clubs that never won the continental competition can still qualify.
Publishing the ranking method in advance is essential, since clubs plan several seasons of continental participation around it.
Caps stop one country dominating the field
Rules usually limit how many clubs a single association may enter, regardless of how many would qualify on ranking alone.
Without a cap, the strongest league could occupy a large share of the tournament and reduce its global character, which is the tournament's entire premise.
Champions are normally exempt from the cap, so winning the continental competition guarantees entry even where the national limit is already reached.
The calendar is the binding constraint
Domestic seasons, continental competitions and international windows already occupy most of the year, leaving few slots for an additional tournament.
Player unions and leagues object on workload grounds, and their objections are about the total number of matches rather than this competition specifically.
Scheduling it in a gap between seasons solves the fixture problem and creates a new one, since players lose recovery time rather than match time.
Qualification decided years ahead has odd effects
Because places are awarded on results across multiple prior seasons, a club can qualify and then decline sharply before the tournament is played.
The reverse also happens, and a club in excellent form may be absent because its results in the qualifying period were poor.
Every long qualification window has this property. It rewards consistency over current strength, and organisers accept that because the alternative is deciding entry too late to sell the competition.

