Forming an LLC in Illinois is a strategic move for data scientists seeking liability protection and tax flexibility. Illinois, a major business hub, offers a robust environment for data science professionals. For a deeper dive, see our resource on applying for an EIN in Illinois. Lovie simplifies the LLC formation process, handling compliance and registered agent services with AI-powered efficiency.
The primary cost of forming an LLC in Illinois is the $150 filing fee for the Articles of Organization. There is also a $75 annual report fee.
Lovie offers a comprehensive solution that includes formation, registered agent services, and compliance management for a fixed monthly price.
Forming an LLC in Illinois typically takes 5-10 business days for standard processing. Expedited processing is available for faster turnaround.
With Lovie, the process is streamlined, giving you more time to focus on your data science projects.
Illinois has a 9.5% combined corporate income tax (7% income + 2.5% replacement tax) if you elect to be taxed as a corporation.
The most common LLC formation mistakes include choosing the wrong state, skipping the operating agreement, and failing to separate personal and business finances.
Start your formation with Lovie — $499 one-time, state filing fee included.
State-specific formation guides, cost breakdowns, compliance checklists, and expert comparisons — updated for 2026.