The first round took place on 9 October 2012. Members of the Seimas in the 71 single-seat constituencies were elected by a majority vote, with a run-off held on 28 October. The remaining 70 seats were allocated to the participating political parties using the largest remainder method, with a 5% threshold to enter the parliament. Candidates took the seats allocated to their parties based on the preference lists submitted before the elections and adjusted by preference votes given by the voters.
