Which manufacturing-adjacent equipment qualifies for Texas's manufacturing sales tax exemption — hand tools, quality-control gauges, mold-design equipment — and which doesn't?

Plain-English summary

A manufacturer asked the Comptroller to rule on five specific pieces of equipment across two product lines, testing the boundaries of Texas's manufacturing sales tax exemption:

1. Submersible pump epoxy applicator bottles: A pump manufacturer squeezes epoxy from a disposable RTV bottle to seal motors before assembly, then discards the bottle. Ruling: not exempt — the bottle is a hand tool.
2. Digital calipers for quality control: Ruling: if the calipers are hand-operated, they're hand tools and not exempt, regardless of the digital readout — "a digital readout is not an indicator of a piece of equipment's taxability." Non-hand-operated calipers could qualify for the § 151.318(a)(8) quality-control exemption, but only if used during the actual manufacturing operation and meeting all other criteria of that exemption.
3. Mold design/tooling/production equipment (for a plastic injection molding company): Ruling: not exempt — this equipment doesn't manufacture the product being sold; it makes the molds that will later be used to manufacture the product.
4. Computers/software used to design molds: Ruling: not exempt, for the same reason as #3 — designing the mold isn't manufacturing the product to be sold.
5. Gauges used to test the injection-molding equipment itself: Ruling: not exempt — the quality-control exemption in § 151.318(a)(8) covers testing the quality of the product being manufactured, not testing the manufacturing equipment.

The throughline: Texas's manufacturing and quality-control exemptions are drawn tightly around equipment that directly acts on, or tests, the final product being sold — hand tools, mold-making tooling, and equipment-testing gauges all fall outside that boundary, however closely related they are to the manufacturing operation.

What this means for you

Manufacturers claiming the manufacturing/QC exemption

Don't assume every tool or gauge used somewhere in your production line qualifies just because it's "used in manufacturing." Ask: (a) is it a hand tool (disqualifying, regardless of features like digital readouts)? (b) does it act on/test the finished product itself, or does it act on/test the equipment or tooling that makes the product? Only equipment testing the actual product, used during the manufacturing operation, can qualify under § 151.318(a)(8).

Plastic injection molding companies specifically

Mold design, tooling, and production equipment — plus the computers/software used to design molds — sit one step removed from manufacturing the actual product and don't qualify for the exemption, even though molds are essential to your process.

Accountants and tax professionals

This letter is a useful multi-example illustration of § 151.318(a)(8)'s product-vs-equipment distinction and the hand-tool carve-out (which applies regardless of technological sophistication like digital displays).

Common questions

Q: Do digital tools automatically qualify for manufacturing exemptions since they're more sophisticated than manual tools?
A: No — per this ruling, a digital readout doesn't change whether a hand-operated tool is a "hand tool"; hand-operated calipers are hand tools whether or not they have a digital display, and hand tools don't qualify for the exemption.

Q: Does equipment used to make molds for a manufacturing process qualify for the manufacturing exemption?
A: No — mold design, tooling, and production equipment (and the computers/software used to design molds) are one step removed from manufacturing the product being sold, so they don't qualify.

Q: Are all quality-control tools exempt?
A: No — only tools testing the quality of the actual product being manufactured qualify under § 151.318(a)(8), and only if used during the actual manufacturing operation. Gauges testing the manufacturing equipment itself do not qualify.

Q: Can another manufacturer rely on this letter for similar equipment?
A: No. It addresses these specific pieces of equipment and facts; different equipment or a different role in the manufacturing process could be analyzed differently.

Citations and references

Statutes and rules:

• Tex. Tax Code § 151.318(a)(8) (Manufacturing Exemption — Quality Control Items)

Source

• STAR search: https://star.comptroller.texas.gov/search?doc_type_code=L&tax_type_code=SST
• Opinion: https://star.comptroller.texas.gov/view/200107363L

Original ruling text

July 6, 2001

Dear **:

Thank you for your recent letter regarding manufacturing and Texas sales tax.

You presented the following scenarios and questions:

1. A company manufacturing submersible pumps for outdoor gardens and ponds
   uses epoxy to seal the motor of the pump before assembling the external plastic
   casing. They use an RTV bottle to squeeze epoxy onto the motor. The bottles
   are disposed of after being used. You asked if the RTV bottle qualifies for
   exemption.

Response: No. The bottles are hand tools and do not qualify for exemption.

2. A manufacturer used calipers with a digital readout for quality control.
   You asked if the digital readout calipers qualify for exemption.

Response: If the calipers are operated by hand, they are considered hand tools
whether or not the readout is digital. If, however, the calipers were operated
by some other method, they would qualify for exemption provided the calipers
are used during the actual manufacturing operation and met all the other
criteria for the exemption of quality control items specified in Texas Tax Code
Section 151.318(a)(8). A digital readout is not an indicator of a piece of
equipment's taxability.

The next three questions are in reference to a plastic injection molding
company.

3. You asked if equipment a plastic injection molding company uses to design,
   tool, and produce molds for injection machinery is exempt from Texas sales tax.

Response: No. Equipment used to design, tool, and produce these molds does
not qualify for exemption as manufacturing equipment. This is not the
manufacturing of the product to be sold.

4. You asked if either computers or software used to design molds are exempt
   from Texas sales tax.

Response: No. Computer equipment or software used to design these molds does
not qualify for exemption as manufacturing equipment. This is not the
manufacturing of the product to be sold.

5. You asked if gauges used to test injection-molding equipment qualify for
   exemption from Texas sales tax.

Response: No. The exemption for quality control is for testing the quality of
the product being manufactured, not the manufacturing equipment itself.

This opinion is based on the facts presented. Additional or different facts
may yield different results.

You may call me toll free 1-800-531-5441, extension 5-9787, if you have any
questions or need more information. The direct line is 512/305-9787. You may
also write to Tax Policy Division, Comptroller of Public Accounts.

Sincerely,

Philip Knisely
Tax Policy Division