The cup kicked off with the single-legged preliminary round which was scheduled on 29 August 2012. Most of the top flight clubs entered the competition in the following round, scheduled on 26 September 2012, with the exception of Lokomotiva, RNK Split and Zadar, as their cup coefficient (determined by their cup record over the last five seasons) was too low to skip the preliminary round.
The draw for the preliminary round was held on 1 August 2012 with matches scheduled on 29 August 2012. This round consists of 16 single-legged fixtures. A total of 32 clubs entered the preliminary round: 21 regional cup winners organized at the county level and 11 regional cup finalists (from the top 11 counties with the greatest number of registered football clubs).[1][2]
First round proper consisted of 16 single-legged matches, with 16 winners of the preliminary round joined by 16 clubs with the highest cup coefficients (including remaining nine top level clubs). The draw for the first round was held on 30 August, where the club with the lowest cup coefficient hosts the one with the highest and so on. Matches are scheduled on 26 September 2012.
The second round was contested by 16 winners from the first round, over eight single-legged fixtures played on 31 October 2012. It was the last stage of the competition employing the single-leg format, as from the quarter-finals onward all fixtures were double-legged events.
The eight clubs remaining in the competition after the second round were paired for the quarter-finals. From the quarter-finals onwards the ties will be played in a two-legged format. The draw was held on 7 November 2012.[3]