Table of Contents
- Introduction
- Nexus Considerations
- General Rules and Compliance Considerations
- Registration, Collection, and Sourcing Rules
- Collection, Rates, and Remittance
- Pitfalls and Risks
- International Sellers
- Audit Considerations
- Voluntary Disclosure Agreements (VDAs)
- Conclusion
- References & Resources
1. Introduction
Purpose of This Guide
This comprehensive guide is designed specifically for online sellers conducting business in Connecticut. Whether you're an Amazon seller, direct-to-consumer brand, marketplace seller, international shipper, or e-commerce retailer, understanding Connecticut's sales tax obligations is critical for your business success and compliance.
Connecticut's sales tax landscape has evolved significantly since the 2018 Wayfair decision, creating new responsibilities for online sellers. The state has implemented economic nexus thresholds, marketplace facilitator laws, and specific requirements for remote sellers that can trigger substantial compliance obligations. These rules apply to all online sales channels, from major marketplaces like Amazon and eBay to your own e-commerce website. This guide will help you navigate Connecticut's sales tax requirements, understand when you must register and collect tax, avoid common compliance pitfalls, and protect your business from costly penalties and audit exposure.
Why This Matters
Connecticut is particularly aggressive when it comes to sales tax enforcement for online sellers. The financial stakes are substantial, with criminal penalties possible for failure to collect and remit sales tax, as collected sales tax belongs to the state, not your business. Severe financial exposure can result from penalties and interest charges. Business disruption through tax liens, asset seizure, and business closure are real consequences of non-compliance, and personal liability means business owners and officers can be held personally responsible for unpaid sales tax under Connecticut General Statutes § 12-414a.
Common risks for online sellers include:
- Inventory nexus through fulfillment centers (like Amazon FBA)
- Marketplace confusion about collection responsibilities
- Underestimating economic nexus thresholds
- Failing to register after crossing $100,000 in sales and 200 transactions
- Mixing marketplace and direct sales without proper tax management
The good news is that with proper understanding and compliance systems, you can protect your business while taking advantage of Connecticut's market opportunity. Connecticut's simplified tax structure—with a single statewide rate and no local taxes—makes it more manageable than many other states. This guide provides the roadmap to get you there.
Ready to ensure compliance? The following sections will walk you through every aspect of Connecticut sales tax for online sellers, with practical examples and direct links to official state resources.
- Full access to this and other expert-written guides
- Our Nexus Checker to assess your exposure across states
- State- and industry-specific insights and compliance tips
- Updates on new rules and best practices to stay ahead