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February 27, 2024

Sales Tax For eCommerce Guide: All You Need To Know

Discover how to handle sales tax for your eCommerce business with our expert guide. Learn about nexus, reporting, and compliance to boost your sales.

Sales Tax For eCommerce Guide: All You Need To Know

The rise of eCommerce has revolutionized the way small businesses operate, offering vast opportunities for growth and expansion. However, one area that can be particularly challenging for online retailers is navigating sales tax on online sales. Understanding the obligations and requirements for collecting sales tax on eCommerce transactions is crucial to ensuring compliance and avoiding potential penalties. In this comprehensive guide, we will explore the intricacies of sales tax for eCommerce businesses and provide valuable insights on managing eCommerce taxes in the digital marketplace.

Understanding Sales Tax

Sales tax is a levy imposed on the sale of certain goods and services. It is charged by 45 states and numerous local governments, with the responsibility for collection and remittance falling on the seller. However, when sales tax is not collected by the seller, consumers are generally required to pay use taxes directly to their state or local government.

Sales Tax Obligations for eCommerce Businesses

In the past, sales tax nexus—the connection between a business and a state that triggers tax obligations—was primarily based on physical presence. However, a landmark 2018 Supreme Court decision in South Dakota v. Wayfair expanded the definition of nexus to include taxes on eCommerce businesses with no physical presence within a state's borders. This ruling paved the way for states to enact remote seller laws, compelling online retailers to collect and remit sales tax.

Complying with eCommerce Sales Tax Laws

Step 1: Determining Sales Tax Nexus

To effectively manage sales tax for your eCommerce business, it is crucial to determine where you have sales tax nexus. While some states do not impose sales tax, most have specific thresholds that trigger tax obligations. Researching state requirements and consulting resources provided by organizations such as the Streamlined Sales Tax Governing Board (SSTGB), National Conference of State Legislatures, and the Tax Foundation can help you navigate the complexities of sales tax nexus.

Step 2: Evaluating Affiliate Policies

If you sell through third-party marketplaces like Amazon or Etsy, understanding their marketplace facilitator laws is essential. While these platforms may handle the bulk of sales tax collection and remittance, it is still important to familiarize yourself with the laws in states where you conduct business. Asking clarifying questions and periodically auditing transactions can help ensure accurate taxation.

Step 3: Obtaining Seller's Permits

Once you have determined where you need to collect sales tax, you will likely need to register your business with the revenue department and obtain a seller's permit or sales tax permit in some states. Checking state websites and utilizing state tools, such as Alaska's online sales tax lookup tool, can streamline the registration process and facilitate compliance.

Step 4: Collecting and Remitting Sales Taxes

Each state has its own process for collecting and remitting sales taxes, with monthly or quarterly filing being common. Utilizing eCommerce content management systems (CMS) and small business tax software can simplify the collection, reporting, and remittance process. Additionally, training employees on handling sales tax for remote transactions is crucial to ensure compliance.

Step 5: Monitoring Compliance

Given the evolving nature of remote seller laws, it is essential to conduct periodic audits and stay informed about changes in the law. Subscribing to state revenue department newsletters, following them on social media, and monitoring sales closely can help you proactively address compliance issues. Seeking guidance from small business tax advisors can further assist in navigating the complexities of eCommerce taxation.


As eCommerce continues to thrive, sales tax for online transactions remains a complex and ever-changing landscape. Adhering to sales tax obligations is crucial for small businesses to maintain compliance and foster growth. By understanding the intricacies of eCommerce tax, determining sales tax nexus, utilizing state resources, and adopting appropriate tools and processes, small businesses can navigate this terrain with confidence. Stay ahead of the curve, ensure compliance, and seize the boundless opportunities offered by the world of eCommerce.

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