In Chicago's diverse market, SEO timelines vary by industry competitiveness. Generally, you'll see initial movement in rankings within 2-3 months, with significant improvements in 4-6 months. Chicago's technology and healthcare sectors face intense competition, potentially extending timelines to 6-9 months for competitive keywords. Meanwhile, specialized manufacturing businesses might see faster results (3-4 months) due to less saturated search landscapes. Local SEO for Chicago neighborhood-specific terms can show results even faster, sometimes within 6-8 weeks. The key factors affecting your timeline include your website's current authority, competitor strength, and whether you're targeting citywide terms like 'Chicago financial services' versus more specific niches. Most importantly, SEO is an ongoing process—even after achieving rankings, continued optimization is essential in Chicago's dynamic business environment.