On 11 June 2014, Pirlo signed a new contract keeping him at Juventus until 2016. Pirlo made his 100th league appearance for Juventus in a 3–2 home win over Roma on 5 October 2014. On 1 November, Pirlo scored Juventus's opening goal from a free kick in a 2–0 win over Empoli, on their 117th anniversary; this was his 26th goal from a free kick in Serie A, putting him two goals behind the all-time record holder, Siniša Mihajlović. On 4 November, Pirlo scored once again from a trademark, curling direct free kick in a 3–2 home win over Olympiacos in a group-stage UEFA Champions League fixture. This was Pirlo's 100th appearance in the UEFA Champions League, marking the occasion with his first UEFA Champions League goal with Juventus. On 15 December 2014, Pirlo was named the Serie A Footballer of the Year for the third time in his career, and for the third consecutive year since his arrival at Juventus; he was also named part of the 2014 Serie A Team of the Year. In Juventus's 2–1 home victory over Borussia Dortmund in the round of 16 of the UEFA Champions League, on 24 February 2015, Pirlo left the pitch during the first half of the match, after injuring his right calf, ruling him out for three weeks. Pirlo was called up on 11 April 2015 against Parma following his injury. He returned to the starting line-up on 14 April 2015, helping Álvaro Morata to win a penalty which was later converted by Vidal in a 1–0 victory over Monaco at the Juventus Stadium, in the first leg of the UEFA Champions League quarter-finals; he was replaced by Andrea Barzagli during the second half. On 26 April, Pirlo scored from a free kick in a 2–1 away defeat to local rivals Torino in the "Derby di Torino"; this was his 28th goal in Serie A from a free kick, which put him level with Mihajlović as the player with the most goals from free kicks in Serie A history. On 20 May, Pirlo played a part in both of Juventus's goals as the Turin club defeated Lazio 2–1 at the Stadio Olimpico in the 2015 Coppa Italia Final. On 6 June 2015, Pirlo played the entirety of the 2015 UEFA Champions League Final as Juventus were defeated 3–1 by Barcelona at Berlin's Olympiastadion; this was the final game of his Juventus career. Pirlo was named to the 2014–15 UEFA Champions League Squad of the season for his performances.
In the 2014 World Cup, Italy were placed in Group D, along with Costa Rica, England and Uruguay, in what was called the "Group of Death". On 14 June, in Italy's opening match against England, Pirlo wore the captain's armband due to Buffon's last minute injury. The match ended with a 2–1 win to Italy. Pirlo heavily contributed to Italy's win, controlling the flow of the game, and setting up several goalscoring chances, as Italy dominated possession. During the match, Pirlo made 108 passes in total, only misplacing five, with a pass completion rate of 95.4%, completing the most passes of any other player in the previous opening matches of the 2014 World Cup. With a 93.2 pass percentage, Italy also managed to record the highest pass accuracy percentage of any team in a World Cup match since Denmark in the 1966 World Cup, completing 561 of their 602 passes. Pirlo also contributed to Italy's first goal of the match: Antonio Candreva's short corner was played to Marco Verratti, who then passed the ball out wide towards Pirlo, who drew his marker with him. Pirlo let the ball pass in between his legs to Marchisio, leaving him with space to score with a low drive from outside the area. Pirlo also managed to hit the crossbar from a swerving free kick in injury time. Italy suffered 1–0 defeats in both of their remaining matches against Costa Rica and Uruguay, however and were eliminated in the group stage for the second consecutive World Cup, finishing in a disappointing third place in their group, behind Costa Rica and Uruguay. Pirlo's appearance against Uruguay was his 112th cap for Italy, which allowed him to equal Dino Zoff's number of appearances for the Italian national team, and made him the fourth most capped player for the Italian national team. The Italian squad and manager, Cesare Prandelli, were criticised for over-relying on Pirlo to create goalscoring chances. Although Pirlo was able to set up some goal scoring opportunities and did test the opposition goalkeepers with some dangerous free kicks in the final two group games, his performances were stifled by the defensive pressure of the opposition, and he was much less dominant than he had been in the opening match against England. Although he had previously communicated his intention to retire after the World Cup, he stated, upon his return to Italy, that he would still be available to play for the national team.
Pirlo is one of two children along with his brother Ivan. He was married to Deborah Roversi between 2001 and 2013; the couple have two children: son Niccolò (born 2003) and daughter Angela (born 2006). The couple separated in 2014.