Is engineering and design work for a piping-system prototype a taxable sale of tangible personal property, or a nontaxable professional service, in Texas?

Plain-English summary

An engineering firm requested a ruling on whether its charges for professional design, engineering, and management of mechanical and process piping systems -- primarily for the semiconductor industry -- were taxable. The output was a computer-generated 3D model produced with the firm's own in-house software and design methods, refined by in-house engineers and construction staff, and backed by professional errors-and-omissions insurance guaranteeing the design's feasibility.

The company argued two things: (1) this wasn't taxable "data processing," because Rule 3.330 excludes computer use that merely facilitates the application of specialized knowledge (like physical sciences or accounting principles) -- drawing a comparison to medical transcriptionists, who apply specialized knowledge to translate and refine information but aren't themselves taxed as data processors; and (2) this wasn't the sale of tangible personal property either, since the firm's engineers weren't mere "draftsmen" producing schematics from someone else's specs, but professionals who developed schematic designs with clients, caught and corrected design/engineering errors, and added engineering value (functionality, space allocation, cost minimization) beyond what clients supplied.

The Comptroller agreed on both counts. The charges for the design, engineering, and management services are not taxable -- the essence of the transaction is a professional service, not a sale of tangible personal property. But the ruling draws an important line: the company must still pay tax on the materials and equipment it uses to build the prototype itself. And separately, the Comptroller notes a related but different scenario: when a manufacturer is given specifications and builds a prototype from them, that transaction IS treated as the taxable fabrication and sale of tangible personal property (citing Hearing Nos. 35,019 and 18,871).

What this means for you

Engineering and design firms

If your firm's essence-of-the-transaction is applying specialized professional knowledge to develop, refine, and improve a design -- not just drafting a client's own specifications into a schematic -- your design/engineering/management charges can be nontaxable services. But you still owe tax on the materials and equipment your firm itself uses to build any physical prototype.

Manufacturers who build prototypes to spec

If you're the one manufacturing a prototype from specifications someone else hands you, that's treated differently -- as a taxable fabrication and sale of tangible personal property, per Comptroller Hearing Nos. 35,019 and 18,871 cited in this letter.

Accountants and tax professionals

The key test is the "essence of the transaction," per Texas Supreme Court guidance referenced in the letter: does the professional add substantive engineering value beyond a client's own specifications (nontaxable service), or is the firm just executing someone else's spec into a physical or drafted product (potentially taxable)? Whether the computer is merely a tool for applying specialized knowledge (Rule 3.330) is also part of the analysis for any data-processing angle.

Common questions

Q: Are engineering design services always exempt from Texas sales tax?
A: Not always -- per this letter, they're nontaxable when the essence of the transaction is a genuine professional service adding engineering value, not a taxable data-processing service or a mere drafting/sale of tangible personal property.

Q: Does the firm pay any tax at all in this scenario?
A: Yes -- per this letter, the firm still owes tax on the materials and equipment it uses to physically build the prototype, even though its design/engineering charges to the client are not taxable.

Q: What if a manufacturer builds a prototype from specs someone else provides?
A: Per this letter, that's a different situation -- treated as the taxable fabrication and sale of tangible personal property, not a nontaxable design service.

Citations and references

Rules and prior policy cited:

• 34 Tex. Admin. Code Rule 3.330 (data processing services — excludes computer use that merely facilitates application of specialized knowledge)
• Comptroller Hearing No. 35,019 and Hearing No. 18,871 (fabrication/sale of tangible personal property when a manufacturer builds a prototype from client-supplied specifications)

Source

• STAR search: https://star.comptroller.texas.gov/search?doc_type_code=L&tax_type_code=SST
• Opinion: https://star.comptroller.texas.gov/view/9807663L

Original ruling text

July 7, 1998

Dear Mr. **:

Thank you for asking for written confirmation of our telephone discussion
relating to the taxability of prototype engineering and design charges.
Following is a restatement of the information you provided.

Your client requests the ruling on the taxability of its professional services
for the design, engineering and management of mechanical and process piping
systems, primarily in the semiconductor industry. The company believes that
these services are not taxable services nor the sale of tangible personal
property.

The output of the design services is a computer generated three-dimensional
model derived from the company's own in-house development of state-of-the-art
software and design methods. The company supports this service with management
and construction personnel who interpret and refine their designs during the
construction activities. The designs are reviewed and approved by in-house
engineering and consulting professional engineers as requested. Professional
"errors and omissions" liability insurance is required by the company's clients
for the guarantee of the feasibility of the designs.

You believe that the services are not taxable data processing because the
services involve the application of specialized knowledge of industry
practices, particularly the semiconductor industry. You point out that Rule
3.330 provides that "data processing does not include the use of a computer by
a provider of other services when the computer is used to facilitate the
performance of the service or the application of the knowledge of the physical
sciences, accounting principles, and tax laws."

It is your belief that the design services provided by the company's
engineering and management staff are similar in some respects to the services
of medical transcriptionists, which the Comptroller has acknowledged are not
data processing. In the preparation of the final documents, your client must
interpret, translate, refine and correct the inaccuracies of any previous
designer/engineer's efforts. This is similar to medical transcriptionists, who
are not physicians, but apply specialized knowledge of terminology and methods
to translate information into a form that is accurate and usable by physicians.

You also believe that the product provided by the company is not tangible
personal property. In prior interpretations, the Comptroller has taken the
position that the charges of "draftsmen" are taxable as the sale of tangible
personal property. However, the company professionals are not "draftsmen."
The Texas Supreme Court has made it clear that in determining whether a
transaction involves a service or the sale of tangible personal property, the
Comptroller must consider the essence of the transaction.

In this case, the essence of the transaction is not the sale of tangible
personal property, but the provision of a professional service. The company
professionals are not mere draftsmen of schematic diagrams from specifications
provided by third parties. Rather, they are providers of a professional
service by applying their specialized knowledge of best design and construction
practices to (1) participate in the development of schematic designs and
specification with it clients, (2) identify and correct design and engineering
errors in the information provided to the company, and (3) provide an
additional level of design engineering to maximize functionality, space
allocation, and utilization and to minimize construction costs. In other
words, the specification, design and engineering output of the company exceeds
the specification, design, and engineering input that the company receives from
its clients. Accordingly, the essence of the company's product is a service
rather that the sale of tangible personal property.

RESPONSE:

You are correct. Your client is providing non-taxable services. The charges
to their clients are not taxable. Your client should pay tax on all the
materials and equipment used to make the prototype. The Comptrollers position
on prototypes is that when the transaction involves the design, specifications
and engineering of the prototype, the essence of the transaction is considered
the sale of non-taxable services. When the manufacturer of the prototype is
provided the specifications for the prototype, the transaction is considered
the fabrication and sale of tangible personal property. Hearing No's. 35,019
and 18,871 set out this policy. I am also attaching a Taxability Response, No.
TR0926 addressing this issue.

This opinion is based on the facts presented. If there are any additional or
different facts, the opinion may change.

You may call me toll free at 1-800-531-5441, ext. 3-4675. The direct line is
(512) 463-4675. You also may write to Tax Policy Division, Comptroller of
Public Accounts. You may also e-mail our tax help section at:
[email protected]>

Sincerely,

Tom Soto
Tax Policy Division