1998 PBA All-Filipino Cup
      
The 1998 Philippine Basketball Association (PBA) Centennial All-Filipino Cup, also known as the 1998 McDonalds-PBA All-Filipino Cup for sponsorship reasons, was the first conference of the 1998 PBA season. It started on February 1 and ended on May 8, 1998.
Format
The following format will be observed for the duration of the conference:
- The teams were divided into 2 groups.
 
- Teams in a group will play against each other once and against teams in the other group twice; 11 games per team; Teams are then seeded by basis on win-loss records. Ties are broken among point differentials of the tied teams. Standings will be determined in one league table; teams do not qualify by basis of groupings.[1]
 
- The top six teams after the eliminations will advance to the semifinals.[2]
 
- Semifinals will be two round robin affairs with the remaining teams. Results from the elimination round will be carried over.[3] A playoff incentive for a finals berth will be given to the team that will win at least seven of their ten semifinal games.
 
- The top two teams (or the top team and the winner of the playoff incentive) will face each other in a best-of-seven championship series. The next two teams will qualify for a one-game playoff for third place.
 
Elimination round
Team standings
Semifinal round
Team standings
|   | Qualified for finals | 
|   | Qualified for finals playoff | 
|   | Qualified for battle-for-third | 
Note: Sta.Lucia Realtors clinch a playoff for finals berth under the win 7-of-10 semis incentive
Finals berth playoff
Battle for third place
Finals
References
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  |   |   |  | Team seasons |  | 
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  |  | Guest teams |  | 
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  |  | Succession |  | 
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  |  | All-Filipino Conference |  | 
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  |  | All-Filipino Cup |  | 
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  |  | Philippine Cup |  | 
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  |  No All-Filipino tournament were held for the  1981 and  1982 seasons.  |  
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