Over the last several years, TSPS has been working with the Texas Comptroller's staff in an effort to obtain clarification as to which types of surveys are taxable and which types of surveys are non-taxable.
Clarification on the submitted list of survey types is expected in the near future. In the meantime, the list of taxable/non-taxable surveys that TSPS submitted is available as a resource only.
You can view TSPS Legal Counsel Mark Hanna's Sales Tax Update (with survey list) HERE.
It is important to note that this list as proposed by TSPS has not been approved by the Texas Comptroller. Therefore, each TSPS member must make his or her own independent decision when deciding which surveying services are taxable and which surveying services are non-taxable.