Texas Sales Tax Audit Risk Guide 2026

If your business created nexus in Texas but did not register or collect sales tax, you may face audit risk from the Texas Comptroller.

Audit risk increases when:

Identifying nexus exposure before contact from the Comptroller reduces enforcement risk.

What Triggers a Texas Sales Tax Audit

Common triggers include:

Businesses that surpass nexus thresholds but do not file returns are frequently flagged.

Before registering or filing, confirm whether your business has created sales tax nexus in California or Texas.

The Comptroller uses multiple data sources to detect potential sales tax exposure:

If reported revenue suggests nexus but no permit exists, audit likelihood increases.

An audit may include:

If nexus existed for multiple years, total liability may grow substantially.

Businesses can reduce risk by:

Taking action before receiving audit contact provides more flexibility.

Texas may review prior periods where nexus existed and required returns were not filed.

Exceeding economic nexus thresholds without registration significantly increases audit risk.

In certain voluntary compliance situations, penalty relief may be available.

If your business may have created nexus in Texas, determining exposure before receiving audit notice is critical.

Identify potential audit exposure and next steps before enforcement escalates.