In April 2025, the SPD put its coalition agreement with the CDU and CSU to a vote of all party members. About 85 percent voted yes. Turnout was 56 percent. The vote was valid only if at least 20 percent of the members took part.
The party had held such votes before. In 2013, 76 percent voted yes. In 2018, the youth wing campaigned against another grand coalition under the slogan NoGroKo. Even so, 66 percent voted yes. Turnout in both years was over 78 percent.