**Expanded eligibility and structural changes are the primary drivers behind the strong trader consensus favoring higher turnout in Berlin’s 20 September 2026 Abgeordnetenhaus election.** The state election commission projects roughly 2.5 million eligible voters, an increase from just over 2.44 million in the February 2023 repeat election, fueled by rising naturalizations and the first-time inclusion of 16- and 17-year-olds. District assembly elections held concurrently further enlarge the pool by allowing EU citizens to participate, creating overlapping incentives for mobilization. **A competitive multi-party race, with polls showing Die Linke, CDU, AfD, and the Greens clustered in the mid-to-high teens to low twenties, adds to expectations of greater engagement.** Parties and civil society organizations are actively promoting participation, while the roughly one-month timeline before election day has intensified campaign activity. These factors—larger and more diverse electorate, simultaneous local contests, and visible partisan competition—align with historical patterns in which expanded access and contested races lift participation rates relative to the low-turnout 2023 repeat vote. No major countervailing events have emerged to suggest suppression of turnout.