How do I collect sales tax legally?

How to Legally Collect Sales Tax in Illinois

Collecting sales tax in Illinois requires understanding state requirements, registering properly, and maintaining accurate records. Follow these steps to ensure compliance and smooth operations.

Register for a Sales Tax License

• Register with the Illinois Department of Revenue (IDOR): Before collecting sales tax, you must obtain a sales tax permit by registering your business online through the IDOR's MyTax Illinois portal.
• Provide required information: This includes your federal Employer Identification Number (EIN), business details, and contact information.

Understand Taxable Sales and Rates

• Identify taxable products and services: Most tangible personal property sales are taxable, but some services may also be subject to sales tax. Review IDOR guidelines to classify your sales correctly.
• Apply correct tax rates: Illinois has a state sales tax rate, but local jurisdictions (cities, counties) may impose additional taxes. Use IDOR resources or tax automation software to calculate the combined rate for each sale location.

Collect and Remit Sales Tax

• Collect sales tax at the point of sale: Include the appropriate tax amount on customer invoices or receipts.
• Keep detailed records: Maintain accurate sales and tax collection records for bookkeeping and compliance purposes.
• File sales tax returns: Submit returns and remit collected tax to the IDOR on the required schedule (monthly, quarterly, or annually), depending on your sales volume.

Stay Compliant with Reporting and Updates

• Monitor changes in tax laws: As of 2026, tax rates and rules may change. Regularly check IDOR updates or subscribe to notifications.
• Use automation tools: Consider integrating sales tax software to automate rate calculations, collection, and filing, reducing errors and administrative burden.
• Employee training: Train staff on proper tax collection procedures to ensure consistency across all sales channels.

Following these operational steps will help your Illinois business collect sales tax legally and efficiently, supporting compliance and smooth financial management.