For Whom The Web Rocks
Puerto Rico - Rules - Customs House

The owner of the occupied customs house earns, at game end, one additional victory point for every four victory points he acquired during the game. The player should only count his victory point chips (and any extra victory points recorded on paper after the chip supply was exhausted, but before game end). He does not use victory points earned for his buildings at game end.

Example: At game end, the owner of the occupied customs house has accumulated 23 victory points in VP chips: he earns an additional 5 VP.

Costs 10 doubloons
4 victory points

1 victory point for every 4 victory point chips
(game end)