See main article: 2004 Fed Cup Americas Zone. The play-offs of the 2004 Fed Cup Americas Zone Group I were the final stages of the Group I Zonal Competition involving teams from the Americas. Using the positions determined in their pools, the nine teams faced off to determine their placing in the 2004 Fed Cup Americas Zone Group I, the top two countries of each pool played for first to fourth placings, while the bottom two of each pool competed for sixth to ninth. The teams that ended up placing first overall advanced to World Group play-offs, whilst those coming in eighth were relegated down to Group II for the next year.
| Placing | Pool A | Pool B |
|---|---|---|
| 1 | ||
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | ||
The first and second placed teams of each pool were placed against each other in two head-to-head rounds. The winner of the rounds advanced to the World Group play-offs, where they would get a chance to advance to the World Group for next year.
As there were only four teams from Pool A compared to the five from Pool B, the third-placed team from Pool B had no equivalent to play against. Thus the Cubans were automatically awarded fifth place.
The last and second-to-last placed teams of each pool were placed against each other in two head-to-head rounds. The losing team of the rounds were relegated to Group II for next year.
| Placing | Teams |
| Promoted | |
| Third | |
| Fifth | |
| Sixth | |
| Relegated | |