If a computer shop bench-tests a customer's computer to diagnose a problem, is that diagnostic charge taxable on its own, and what happens if the shop then repairs it?

Plain-English summary

A computer sales and repair business asked whether "bench testing" (running diagnostics) on a customer's malfunctioning computer is taxable, separately from whatever repair follows.

The Comptroller's answer turns entirely on whether a repair is actually performed: diagnostic testing and analysis of computer hardware is not subject to sales tax on its own. But if the shop goes on to repair the computer, the total charge — labor and materials, including the earlier diagnostic charge — becomes taxable under 34 TAC § 3.292, the rule governing repair of tangible personal property. In other words, the diagnostic fee isn't exempt because it's separately identified; it's exempt only when no repair follows at all.

What this means for you

Computer repair shops and IT service providers

If a customer pays only for diagnosis (no repair follows — maybe they decide to replace the machine instead, or fix it themselves), that diagnostic charge is not taxable. But the moment you perform an actual repair, the whole invoice — diagnostic time included — becomes taxable, not just the parts and labor portion of the repair itself.

Accountants and tax professionals

This is a useful bright-line rule: standalone diagnostic/testing services on tangible personal property are nontaxable, but roll into the taxable repair charge the instant repair work is performed on the same item.

Common questions

Q: Is a diagnostic/bench-testing fee taxable if no repair follows?
A: No — diagnostic testing and analysis of computer hardware is not subject to sales tax when performed on its own.

Q: What happens to the diagnostic charge if the shop then repairs the computer?
A: It becomes part of the taxable total charge for the repair, along with labor and parts, under 34 TAC § 3.292.

Q: Does it matter if the diagnostic charge is separately stated on the invoice from the repair charge?
A: No — per this letter, once repairs are performed, tax applies to the total charge including the diagnostic portion, regardless of how it's itemized.

Q: Can any computer repair business rely on this exact answer?
A: Not directly. This is a Texas STAR letter ruling binding on the Comptroller only for the taxpayer it addresses (34 Tex. Admin. Code Rules 3.1, 3.10); confirm your own billing structure with a tax professional.

Citations and references

Rules:

• 34 Tex. Admin. Code § 3.292 (Repair, Remodeling, Maintenance, and Restoration of Tangible Personal Property)

Source

• STAR search: https://star.comptroller.texas.gov/search?doc_type_code=L&tax_type_code=SST
• Opinion: https://star.comptroller.texas.gov/view/200010817L

Original ruling text

October 18, 2000

From: Emilio Lerma

To: **

Subject: please advise asap if taxable

Dear **:

I am responding to your questions regarding computer testing and repair
service.

Diagnostic testing and analysis of computer hardware (tangible personal
property) is not subject to sales tax unless you actually repair the computer.
The total charge (labor and materials) to repair tangible personal property is
taxable. See Rule 3.292 concerning the repair of tangible personal property.
If you perform repairs on computers you test, you should tax the total charge
including the diagnostic charge.

To view or down load Rule 3.292, please go to our web site address at
and scroll
to the specific rule.

This opinion is rendered based on the facts presented. Other facts, though
similar, may yield different results.

If you have any questions or require additional information, you may submit
inquiries to our tax help Internet address at , call
1-800-531-5441, extension 6-5809 or write to Tax Policy Division, Post Office
Box 13528, Austin, Texas 78711-3528.

Sincerely

Emilio S. Lerma
Tax Policy Division

On Sun, 8 Oct 2000 16:51:32 -0500 ** wrote:

please clarify this question concerning collecting Texas sales & use tax .

I sell computers, parts, & service

When a customer brings in a computer and doesn't know why it won't work right
and I have to bench test it (run diagnostics) on it to seek out the problem.
Is this service taxable. Normally what happens after that is that I would have
to repair it or put in new parts. I know the parts are taxable. What about the
bench testing & what about the repair service?

Thank you,