As in previous years, the three initial rounds of the Spanish cup will be played over one leg, with two-leg knockouts from there on up to the final. The first three rounds will be between second division A clubs and the top sides from the second division B and the third division, as follows:
First round: This will only involve 23 second division B and 18 third division clubs. The 2B clubs are made up of the top four of each of last season's four regional groups (excluding B teams), plus the seven best placed sides after that. The four promoted sides are excluded, replaced by the four sides who were relegated. The teams qualifying from the third division are the 18 regional group champions, except in the cases where this was a B side, where the runners up will qualify (all but eight of these were actually promoted to the second division B this summer). Five of the 2B sides will be given byes to the next round, leaving 18 ties to be played, with clubs grouped into four geographical regions. Games will be played over one leg at the ground of the first named side, with the losers going in to the Federation Cup.
Second round: The 18 winners from round one plus the five exempt sides will join the 22 second division A sides. The 2A sides will play off against each other in one section of the draw, and the lower division sides will also be drawn against each other in another section, with one team given a bye. Again matches will take place over one leg.
Third round: Once again the 2A sides and the lower division sides will be kept apart, with the 12 survivors from the lower divisions in one half of the draw, and 10 of the winners from the 2A grouping in the other half. One team from 2A will be given a bye.
Fourth round: The 20 first division clubs will only enter the competition in round four together with the twelve survivors from the previous rounds. The six teams from the lower divisions will be drawn against six of the seven sides who are playing in Europe this season (Barcelona, Atlético Madrid, Real Madrid, and Valencia from the Champions League, and Villarreal, Betis and Sevilla from the Europa League). The six second division A sides will be drawn against the remaining sides from the first division. That will leave eight first division sides who will be drawn against each other. As mentioned above, ties take place over two legs, with the first leg at the ground of the lower division club.
Fifth round onwards: Sixteen teams will therefore go in to a fifth round, where the draw will be free. The only proviso is that, where two sides of different divisions meet, the first leg will be played at the ground of the lower division side. As from the quarter finals this condition will no longer apply.
The final this season has been scheduled for Saturday 25th May, at a venue to be decided. (30.07.18)
This year's final will be in Sevilla, at Betis's Benito Villamarín stadium. (31.01.19)
| First round | 5 Sep |
| Second round | 12 Sep |
| Third round | 17 Oct |
| Fourth round first leg | 31 Oct |
| Fourth round second leg | 5 Dec |
| Fifth round first leg | 9 Jan |
| Fifth round second leg | 16 Jan |
| Quarter-finals first leg | 23 Jan |
| Quarter-finals second leg | 30 Jan |
| Semi-finals (two legs) | 6 / 27 Feb |
| Final | 25 May |
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