Texas Sales Tax Audit Guide

Texas sales tax audits are conducted by the Texas Comptroller of Public Accounts. Texas has one of the highest audit rates in the country and one of the most complex webs of sales tax exemptions, making it a frequent source of significant assessments for businesses across sectors. The Comptroller's audit division is well-funded and active, and the agency takes an aggressive posture on exemption documentation and manufacturing qualification. If your business has substantial Texas operations, audit exposure should be evaluated proactively.

Statute of Limitations

Texas has a four year statute of limitations for sales tax assessments, running from the due date of the return for the period in question. The limitation period does not apply when a business has not filed a return for a period. For fraud or intent to evade, there is no limitation. Businesses that have established Texas nexus but have not been filing face unlimited lookback exposure, which is one of the primary reasons a voluntary disclosure agreement is worth considering before the Comptroller initiates contact.

How Businesses Are Selected

The Comptroller identifies audit targets through data matching between sales tax returns and federal and state income tax filings, comparison against industry-specific benchmarks, referrals from other state agencies, and tips from employees or competitors. Businesses in high-audit industries are selected on a regular rotational basis regardless of their apparent compliance. The Comptroller also runs economic nexus enforcement programs targeting out of state sellers who meet the Texas economic nexus threshold of $500,000 in annual sales.

Texas is particularly active in auditing businesses that claim manufacturing or processing exemptions. The Comptroller regularly challenges whether equipment qualifies and whether operations meet the statutory definitions. These disputes generate a disproportionate share of Texas audit assessments.

High-Risk Areas in Texas

• Manufacturing exemptions: Texas provides a manufacturing exemption for equipment used directly in production, but the Comptroller applies a strict "direct use" test. Equipment used in preproduction or postproduction activities is frequently denied the exemption even when the business had a reasonable basis for claiming it.
• Technology and SaaS: Texas taxes most software, but the rules around software as a service, data processing, and information services are technically complex. Auditors frequently characterize technology transactions in ways that maximize taxability.
• Construction contractors: Texas distinguishes between new construction and real property repair and remodeling, with different tax consequences for each. Contractors regularly have audit exposure for materials and subcontract work.
• Resale certificate documentation: The Comptroller requires sellers to obtain and retain valid resale certificates. Expired or deficient certificates result in tax liability for the seller even when the underlying sale was genuinely for resale.
• Agriculture and energy exemptions: Both sectors have specific exemptions that are subject to close scrutiny. The definitions of qualifying uses and qualifying equipment are frequently disputed.
• Food and beverage: Texas has complex rules distinguishing taxable from nontaxable food sales, particularly for restaurants, food trucks, and grocery retailers. These distinctions are a frequent audit issue.

The Texas Audit Process

A Texas audit begins with an audit notification letter from the Comptroller's office identifying the audit period, the records requested, and a proposed starting date. The initial meeting with the auditor is where the scope and timeline are established. This meeting is consequential and should not be attended without legal representation. Statements made at this stage can shape the entire audit.

The fieldwork phase involves review of sales records, purchase invoices, exemption certificates, and tax returns. Texas auditors use statistical sampling. A test period is selected, an error rate is calculated, and the rate is applied to the full audit window. After fieldwork, the auditor issues a Notification of Audit Results identifying the proposed assessment.

You have 60 days from the Notification of Audit Results to request a redetermination hearing. This deadline is firm. Missing it converts the proposed assessment into a final determination that is significantly harder to challenge.

Texas Appeals Process

After a Notification of Audit Results, businesses can request a redetermination hearing before the Comptroller's office. The hearing is an administrative proceeding within the Comptroller's own agency, not an independent tribunal. The hearing officer is a Comptroller employee. Legal preparation is critical because the standard of review is not independent.

If the redetermination is unfavorable, businesses can appeal to the State Office of Administrative Hearings, which provides a more independent review before an administrative law judge. After SOAH, a final appeal can be filed in district court, where the taxpayer can contest both factual and legal findings.

What We Look For in Texas Audits

• Sampling methodology: Texas auditors are required to follow specific procedures. Challenges to sample selection, the test period, and the extrapolation method frequently reduce assessments.
• Manufacturing exemption eligibility: The "direct use" standard is narrower than many businesses assume. We analyze whether denied equipment actually qualifies and build the record for appeal.
• Resale certificate cure: Texas allows sellers to obtain valid certificates after an audit notice to cure deficient documentation for transactions that were genuine resale sales.
• Penalty abatement: Texas allows penalty waiver for reasonable cause, first time audit findings, and good faith reliance on professional advice.
• Voluntary disclosure: For businesses with unfiled periods, a preaudit voluntary disclosure through the Comptroller program can eliminate penalties and limit the lookback period.