The Simplified Sales Tax (SST) program, adopted by 24 states, aims to simplify sales tax administration for remote sellers. It features centralized registration, free compliance for volunteers, and audit protection. However, it requires registration in all 24 states and sacrifices vendor discounts. SST may not be suitable for businesses with nexus in few states or those seeking vendor discounts or a unified compliance solution.
USA: Simplified Sales Tax (SST) Program: Pros and Cons for E-commerce
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Author: Ljubica Blagojević
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Content accuracy validation date:
22.09.2025
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Sales tax compliance across multiple states is complex for e-commerce businesses. The Simplified Sales Tax (SST) program, adopted by 24 states, aims to simplify this process but comes with trade-offs. This overview outlines its important features, benefits, risks, and considerations.
What is the SST Program?
The SST is an agreement among 24 states to standardize sales tax administration for remote sellers. Certified Service Providers (CSPs), certified by the SST Governing Board, integrate with e-commerce platforms to handle tax compliance. Main features include:
- Uniform product/service definitions
- Simplified tax rates
- Centralized tax returns/remittance
- Standardized audits
SST Member States
- Arkansas, Georgia, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Nebraska, Nevada, New Jersey, North Carolina, North Dakota, Ohio, Oklahoma, Rhode Island, South Dakota, Utah, Vermont, Washington, West Virginia, Wisconsin, Wyoming
- Tennessee (Associate Member)
Benefits of Joining SST
- Centralized Registration: The Simplified Sales Tax Registration System (SSTRS) allows one application for sales tax permits in all 24 states, saving time.
- Free Compliance for Volunteers: Businesses without physical nexus in SST states can enroll as “volunteer sellers,” with CSPs handling tax calculation, collection, and remittance at no cost (states pay CSPs).
- Audit Protection: Using a CSP shields businesses from penalties for incorrect tax calculations, with liability on the CSP or state.
Risks and Drawbacks
- All-or-Nothing Registration: SSTRS registers businesses in all 24 states, creating filing obligations even in states with zero sales, increasing administrative burden.
- Loss of Vendor Discounts: CSPs or states retain the 1-2% vendor discounts for timely filing, potentially costing businesses thousands annually.
- Reduced Control: Outsourcing to a CSP limits control over filing and financial data, tying businesses to the CSP’s schedule.
- Partial Coverage: SST covers only 24 states, requiring separate compliance solutions for non-members, leading to a fragmented strategy.
Is SST Right for Business?
SST offers simplicity and audit protection but requires registration in all 24 states and sacrifices vendor discounts. It suits:
- Large businesses with nexus in most SST states
- Businesses prioritizing audit risk mitigation
It may not suit:
- Businesses with nexus in few SST states, where filing burdens outweigh benefits
- Businesses seeking vendor discounts or a unified compliance solution for all U.S. states
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