News & Publications
Red Flags & Readiness: What Triggers Sales Tax Audits—And How to Prepare
Sales and use tax audits can be overwhelming, and even small oversights can lead to costly penalties. While it’s important to understand what triggers audits and how to prepare, many businesses find the process more complex than expected. With the right guidance, you can reduce risk and protect your company from unnecessary exposure.
Key Audit Preparation Tips
1. Gather Documentation
Sales invoices, exemption certificates, and freight/mileage records are essential. But the challenge isn’t just collecting them—it’s ensuring they meet each state’s specific requirements. Auditors frequently disallow documents businesses assume are valid.
Our team often sees businesses surprised when certificates they thought were compliant are rejected—resulting in unexpected assessments.
2. Track Freight and Mileage Charges Carefully
Freight charges, especially when marked up, are a common audit target. States consider the marked-up portion taxable, but rules vary by jurisdiction. Without expert review, businesses can easily misclassify these charges.
3. Stay Objective During the Audit
An audit doesn’t automatically imply wrongdoing. However, misinterpreting an auditor’s findings—or failing to push back when something is misapplied—can cost businesses thousands. Having a partner to validate auditor work helps ensure you’re treated fairly.
4. Become an Expert on Audit Issues
Audits require understanding state-specific tax codes, regulations, and precedents. While research can help, applying that information correctly often requires specialized knowledge.
Many companies discover that the time and cost of navigating audits internally far outweigh the investment of having an expert handle it from the start.
5. Evaluate Signing Waivers Carefully
Waivers extending the audit period may seem harmless, but they can open the door to greater financial exposure. Professional guidance helps you weigh the risks, including interest accrual and long-term impacts on your business.
Why Your Business May Be a Target for Sales and Use Tax Audits
Audits can happen to any business, and understanding why your company might be selected is the first step in reducing risk. Certain triggers often reveal where your business is most vulnerable:
- High ratio of exempt sales – A large percentage of exempt sales can attract scrutiny. Exemption certificate management is time-intensive, and even one missing or expired certificate can lead to significant penalties.
- Industry-specific risks – Certain types of businesses are more likely to be targeted. Cash-based businesses, such as restaurants, are often at higher risk of underreporting. Manufacturers may face challenges with use tax obligations on equipment and supplies.
- Previous audit history – Companies with unresolved past issues are more likely to face follow-up audits, particularly if systemic weaknesses remain.
Even when documentation appears complete, nuanced state rules are easy to misinterpret. Small mistakes or gaps can escalate quickly into larger liabilities.
With professional guidance, businesses can:
- Minimize audit risk
- Defend against overstated assessments
- Free up internal teams to focus on operations instead of paperwork
Preparing ahead of time or addressing vulnerabilities before an audit begins can save your business time, money, and stress. Our team can help ensure your business stays compliant and protected—reach out to discuss how we can support your sales and use tax obligations.
Contributor: Megan Bryarly
Tips for the Taxpayer
Audits can be arbitrary but are often unavoidable. Filing sales and use tax returns can be overwhelming, especially without a streamlined data collection process.
Understanding required data improves efficiency and helps avoid unnecessary costs. Some states offer exemptions, such as resale, manufacturing, exempt organization exemption certificates, to reduce tax liability. Thorough due diligence can help identify potential tax savings for your business.
How Can We Help?
Allyn’s tax team is staffed with seasoned tax professionals experienced in all aspects of Federal, multi-state and local tax compliance and consulting for large US and global corporations. We use that experience to your advantage.
Allyn files state and local sales and use tax returns in every U.S. taxing jurisdiction. Our team routinely conducts nexus reviews in all US states for companies and advises clients with proactive measures to improve their tax compliance. Allyn can register businesses in the U.S. at the Secretary of State level as well as with the Department of Revenue. We can manage your tax compliance, create a solid tax process, and provide audit defense for your company.
Furthermore, our services are conducted with a recognized dedication to customer service, rated over 350% higher than current industry averages. Contact us and we can provide a customized cost-effective solution to meet your company’s needs. For further information on Allyn Tax services, please contact: tax@allynintl.com.
For More Information
If you are interested in learning more about this topic or other tax topics, please visit our Tax Publications under News & Publications at www.allynintl.com.
About Allyn International
Allyn International is dedicated to providing high quality, customer centric services and solutions for the global marketplace. Allyn's core products include transportation management, logistics sourcing, freight forwarding, supply chain consulting, tax management and global trade compliance. Allyn clients range from small local businesses to Fortune 500 firms. Allyn conducts business in more than 20 languages and has extensive experience in both developed and emerging markets. Highly trained experts are positioned throughout North and South America, Europe and Asia. Allyn’s regional headquarters are strategically located in Fort Myers, Florida, U.S.A., Shanghai, P.R. China, Prague, Czech Republic, and Dubai, U.A.E. For more information, visit www.allynintl.com.