1998 PBA All-Filipino Cup
Duration	February 1 - May 8, 1998
TV partner(s)	VTV (IBC)
Finals
Champions	Alaska Milkmen
Runners-up	San Miguel Beermen
Awards
Best Player	Nelson Asaytono (San Miguel Beermen)
Finals MVP	Kenneth Duremdes (Alaska Milkmen)
PBA All-Filipino Cup chronology
< 1997 1999 >
PBA conference chronology
< 1997 Governors' 1998 Commissioner's >

The 1998 Philippine Basketball Association (PBA) Centennial All-Filipino Cup, also known as the 1998 McDonald's-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. The tournament is an All-Filipino format, which doesn't require an import or a pure-foreign player for each team.

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. 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

Semifinals

Team standings

Finals berth playoff

Third place playoff

Finals