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Missouri Your Business Partner for All Things Sales Tax

Missouri Sales Tax Guide for Online Sellers

Prepared by Sales Tax Helper

Table of Contents

  1. Introduction
  2. Nexus Considerations
  3. General Rules and Compliance Considerations
  4. Registration, Collection, and Sourcing Rules
  5. Collection, Rates, and Remittance
  6. Pitfalls and Risks
  7. International Sellers
  8. Audit Considerations
  9. Voluntary Disclosure Agreements (VDAs)
  10. Conclusion
  11. References & Resources

1. Introduction

Purpose of This Guide

This comprehensive guide is designed specifically for online sellers conducting business in
Missouri. Whether you're an Amazon seller, direct-to-consumer brand, marketplace seller,
international shipper, or e-commerce retailer, understanding Missouri's sales tax obligations is critical for your business success and compliance.

Missouri'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 Missouri'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

Missouri is increasingly 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 reaching 100% of tax due, plus interest and collection costs. 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.

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, mixing
marketplace and direct sales without proper tax management, and misclassifying digital products that qualify for Missouri's broad exemptions.

The good news is that with proper understanding and compliance systems, you can protect your business while taking advantage of Missouri's substantial market opportunity. This guide
provides the roadmap to get you there, and the following sections will walk you through every
aspect of Missouri sales tax for online sellers, with practical examples and direct links to official state resources.

Ready to ensure compliance? The following sections will walk you through every aspect of
Missouri sales tax for online sellers, with practical examples and direct links to official state
resources.

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  • State- and industry-specific insights and compliance tips
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