Who owes sales/use tax on materials, equipment, and labor when a contractor builds a highway improvement for the tax-exempt State of Utah (UDOT)?

Plain-English summary

An out-of-state contractor bidding on Utah highway/road-reconstruction work for UDOT sent a detailed list of questions about who owes sales and use tax across the contractor/subcontractor/materials-supplier chain. The Commission answered point by point; the core framework is:

The "end user" rule. Whoever converts construction materials (bricks, lumber, cement, and similar items that lose their separate identity once built into real property) into real property is the taxable "end user" of those materials and owes sales/use tax on them — along with tax on any tools, supplies, or equipment the contractor buys, rents, or leases for the job. It doesn't matter that the finished improvement is ultimately for a tax-exempt government owner; the contractor's purchase of materials is a separate taxable event from any sale of the finished improvement.

Government exemption does not pass through automatically. UDOT, as an exempt entity, can buy tangible personal property tax-free — but for construction materials specifically, that exemption only applies if the State (a) makes the purchase directly and (b) uses its own employees to convert the materials into real property. Having UDOT nominally "purchase" materials on the contractor's behalf provides no tax advantage if the contractor is still the one doing the installation.

None of the contractor's billing to UDOT for the finished improvement is taxable, and there's no Utah "gross receipts" tax on a contractor's or subcontractor's billings — though the contractor remains liable for ordinary corporate income tax on Utah-source income.

Ready-mix concrete bought from a third party is taxed on the full price charged, including delivery. A contractor who instead mixes its own concrete (owned or rented plant) only pays tax on the equipment and raw materials — not on some notional finished-concrete value — and the same principle extends to other on-site material-manufacturing processes (cement-stabilized base, hot-mix asphalt, etc.), as long as the output is permanently installed rather than sold to a third party.

Subcontractor chains follow a "last owner before conversion" rule. If a general contractor buys materials and gives them to a subcontractor to install, the general contractor (as last TPP owner) owes the tax, and the subcontractor's installation-labor charge is not taxable. If instead a subcontractor fabricates and installs its own materials (on-site or off-site, later transported and set in place — e.g., precast concrete jersey barriers), the subcontractor is the end user and owes the tax; its charge to the general contractor for that work is not separately taxable. But if a subcontractor instead sells a finished tangible-personal-property item to the general contractor before it's converted to real property (e.g., fabricated steel I-beams sold to the GC, who then installs them), that sale between subcontractor and GC is taxable, with the GC as final consumer.

Installation charges are only tax-free when the item becomes real property. Installing an item of personal property onto real property (e.g., permanently affixing materials to a building or roadway) is a nontaxable labor charge. But installing one item of personal property onto another item of personal property — like assembling leased scaffolding that isn't affixed to real property — is taxable.

Use tax self-accrual traps: if a contractor buys from an out-of-state vendor that doesn't collect Utah tax, the contractor must self-accrue and remit use tax directly. Same if a contractor buys materials tax-free for resale but then consumes them or converts them to real property itself rather than actually reselling them.

The ruling also flags that a different rule applies to construction materials for schools or religious/charitable organizations — see this corpus's other Utah rulings on that topic (e.g. PLR 96-035, 96-024) rather than assuming this general-contractor framework applies there.

What this means for you

Contractors and subcontractors (in-state or out-of-state)

Building for a tax-exempt government client does not exempt your own material purchases — you're still the taxable "end user" of whatever you convert to real property, plus of your tools/equipment. Track carefully who owns which materials at the moment of conversion in a multi-tier subcontracting chain, since that determines who owes the tax; and watch the sharp line between a subcontractor genuinely installing materials (nontaxable labor) versus selling a finished TPP item to the GC before installation (a taxable sale).

Contractors working with concrete or other on-site material manufacturing

Mixing your own concrete (or asphalt, cement-stabilized base, etc.) on-site and permanently installing it means you're taxed only on the raw materials and equipment — not on some higher finished-product value — which is a meaningfully different (and usually better) tax result than buying ready-mixed concrete from a supplier, which is taxed on the full delivered price.

Government contractors tempted to route purchases through the agency

Don't expect a workaround where the exempt government entity "purchases" materials on your behalf while you still do the installation — the exemption requires both a direct government purchase AND the government's own employees performing the conversion work. If your crew installs it, your company owes the tax regardless of whose name is on the purchase order.

Common questions

Q: Does building for a tax-exempt government agency exempt my material purchases?
A: No — you're still the taxable "end user" of materials you convert to real property, even though the finished improvement isn't taxable when billed to the government.

Q: How can a government agency actually get construction materials tax-free?
A: Only if the agency buys them directly AND uses its own employees (not a contractor) to install them.

Q: Is my subcontractor's installation labor taxable?
A: Not if the subcontractor is installing materials that become real property. It IS taxable if the subcontractor is installing one item of personal property onto another (not becoming real property), or if the subcontractor sells a finished TPP item to you before conversion rather than installing it directly.

Q: Can I rely on this 1996 ruling today?
A: Not directly — it binds the Commission only for the taxpayer and facts it addressed, and Utah's statutes and rules have been renumbered and amended repeatedly since. Verify current law, especially given this ruling's own note that schools/religious/charitable construction materials follow a different rule.

Citations and references

No specific Utah Code sections or administrative rules are cited by number in the available response text; the ruling states general Utah real-property-contractor and end-user consumer principles.

Source

• Landing page: https://tax.utah.gov/commission/rulings/
• Original PDF: https://files.tax.utah.gov/tax/commission/ruling/96-164.htm

Original ruling text

96-164

Response November 4, 1996

Request

State of Utah

Utah State Tax Commission

210 North 1950 West

Salt Lake city, UT 84134

Attn: XXXXX

RE: Sales/Use Taxes

Dear XXXXX

We are an out of state contractor potentially going
to perform construction work for an �exempt� owner in the fine state of
Utah. Written clarification pertaining
to the following questions would be greatly appreciated:

1. Are
   contractors and subcontractors considered to be the �end user� for all their
   purchases, including materials, supplies, equipment parts and third party
   rentals?

2. As �end
   users� are contractors and subcontractors responsible for paying the sales/use
   taxes, on all purchases of tangible personal property from vendors, by either
   paying the vendor the tax or by accruing and paying the State?

3. Do the
   only �truly exempt� purchases of �permanently installed materials� for
   construction projects have to be made by the �exempt� agency on the exempt
   agency's paper?

4. Does a
   contractor, purchasing a read-mix concrete from a concrete supplier, owe sales/use
   tax based on the purchase price of concrete?

5. Does a
   contractor, making concrete with his/her company owned or rented/leased
   concrete plant, only owe sales/use tax on the materials used in making the
   concrete, related supplies and concrete plant equipment parts? Is this true for all types material
   manufacturing type plants such as cement stabilized base, hot mix asphaltic
   concrete, etc.? (Assume that these
   referenced materials would be permanently installed in the exempt construction
   project and would not be sold to a third party.)

6. Is the
   contractor's or subcontractor's labor subject to sales/use tax when performing
   �new construction� for an exempt owner?

7. Is there
   any form of �gross receipts� sales/use tax due that the state based on any
   portion of the contractor's billings to the owner or any portion of the
   subcontractor's billing to the prime contractor?

8. Can the
   contractor �resell� permanently installed materials or any other contractor
   purchased items to an �exempt� owner?

9. Can the
   subcontractor �resell� permanently installed materials or any other
   subcontractor purchased items to a prime contractor that is working for an
   �exempt� owner?

10. Is there
    a difference in the amount of sales/use tax due to the State and Local authorities
    if a subcontractor �furnishes and installs� or if the prime contractor
    purchases the permanently installed materials for the subcontractor? Consider the following steel mill price
    example:

Subcontractor Contractor

Mill Price 25.00 25.00

Fabrication 25.00 25.00

Delivery 10.00 10.00

Erect 10.00 10.00

Total price 70.00 70.00

Tax due @6.125% ? ?

11. Is the
    correct sales/use tax rate in the city limits of Salt Lake City, Utah equal 6.125%
    (4.875% State, 1% City and .25% Transit)?

Please advise as soon as possible.

My direct line is: XXXXX

My fax # XXXXX

Thank you.

Regards,

XXXXX

State of Utah

Utah State Tax Commission

210 North 1950 West

Salt Lake City, UT 84134

Attn: XXXXX

RE: Utah Sales/Use Taxes

Dear XXXXX

As indicated via our phone conversation XXXXX, you
have received my fax and hard copy letter dated XXXXX. I appreciate your cooperation in reviewing
and answering these questions as soon as possible.

We visited briefly concerning subcontractors and you
explained that clarification would be forthcoming. Please send me a written response to the following additional
questions.

1. If a
   subcontractor fabricates a �moveable� product �off site� or �on site� and
   installs his/her fabricated product without the prime contractor �touching� the
   work, the prime contractor does not owe any sales/use tax on the
   subcontractor's billing. Is this statement
   true? (Understand we assume, in this
   instance, the subcontractor is the �end user� and has paid the sales/use tax on
   all of his/her purchases.)

2. If a
   subcontractor fabricates �on site� and the �finished product� is �built in
   place� and �not moveable,� the subcontractor is once again the �end user� and
   is responsible for his/her sales/use taxes.
   In this case the prime contractor does not owe any sales/use tax on the
   subcontractor's billing. Is this
   statement true?

3. Is there any
   instance, pertaining to sub contractors working for prime contractors, when
   sales/use tax is applied to the subcontractor's billing to the prime contractor
   for �labor & skills,� material or supplies?

Regards,

XXXXX

XXXXX

Advisory opinion - Sales tax on construction
materials

Dear XXXXX

We
have received your request for sales tax advice pertaining to purchases of
construction materials that will be used to repair or reconstruct highways in
Utah. As we understand your situation,
you anticipate purchasing all materials and installing them into the highway
project, or you will use subcontractors who will either purchase and install
materials or install materials purchased by your company. No materials will be supplied by UDOT.

We offer the following guidance:

The
purchase of items of tangible personal property is taxable in Utah. If the item
is converted to real property upon installation, the last person to own it
before conversion is liable for the sales tax.
As a general rule, construction materials are considered �converted to
real property� when they are used in the construction of buildings or
improvements on real property.
Construction materials are bricks, lumbers, nails, cement and other
items that typically lose their separate identity as personal property once
incorporated into real property.

If
a contractor purchases construction materials, uses the materials to build a
real property improvement, then sells the finished improvement to the property
owner, the contractor is responsible for paying sales tax on his purchase of
the materials from the supplier because he is the last person to own the
materials in their state as personal property.
Your company must pay sales tax on your purchases of construction materials
and supplies that you will consume in the construction process or convert to
real property.

Because
you mentioned that you may be working with subcontractors, we add following
advice. If your company purchases
construction materials, then resells those materials to a subcontractor who
converts them to real property, you may purchase the materials tax free for
resale, but you must collect sales tax on your sale of those items to the
subcontractor. This is an important
point for you to consider as you structure your agreements with subcontractors
because if you are required to collect sales tax, you must obtain a sales tax
license and report the sales tax at intervals prescribed by law. You can avoid that situation by requiring
your subcontractors to purchase materials directly from suppliers.

We
also caution you that if you are using out-of-state suppliers who do not
collect Utah use tax on your purchases, you must accrue the use tax and report
it directly to the Commission.

With
that background, we turn to your questions:

1. The
   contractor who converts materials to real property is the �end user� for sales
   and use tax purposes. The contractor
   must also pay sales or use tax on tools or supplies that he purchases, rents or
   leases for use during the construction project.

2. As
   �end users,� the contractor should be paying sales tax to the supplier. The supplier, in turn, is responsible for
   reporting and remitting the tax to the Tax Commission. Two exceptions may arise:

a. If the contractor purchases supplies
from an out-of-state vendor which does not have nexus with Utah, the contractor
must accrue and report the use tax directly to the Commission. If you use an out-of-state vendor who does
not collect use tax, assume that you are responsible to pay that tax directly
to the Tax Commission.

b. If the contractor purchases any item
tax free for resale, then either converts the item to real property, converts
it to his own use, or consumes it in the construction process, the contractor
must accrue the sales or use tax and remit it directly to the Tax Commission.

3. An
   exempt entity (in this case, the State of Utah) may purchase items of tangible
   personal property tax free. However,
   the exemption is limited with regard to construction materials. To purchase construction materials tax free,
   the state must not only make the purchase directly, it must also use its own
   employees to convert the materials to real property. Therefore, there is no advantage of having UDOT purchase construction
   materials on your behalf.

4. A
   contractor buying redi-mix concrete from a third party must pay sales tax on
   the entire amount charged (concrete plus delivery).

5. A
   contractor who purchases or rents concrete mixing equipment and the raw materials
   to mix the concrete must pay sales or use tax on both the purchase or rental of
   the equipment and the raw materials used to make the concrete that is converted
   to real property.

6. None
   of the amount charged to UDOT for the finished highway improvement is
   taxable.

7. There
   is no �gross receipts� sales or use tax due.
   However, your company will be liable for corporate income tax on income
   earned from Utah sources.

8. As
   stated in 6 above, if an item of tangible personal property is converted to real
   property by the contractor, the contractor is liable for sales tax on his
   purchase of the item. The charge to the
   property owner (UDOT) for the finished real property improvement is not
   taxable. If the contractor sells items
   of tangible personal property other than construction materials to an exempt
   entity (UDOT), the sale is not subject to tax.

9. The
   contractor or subcontractor cannot avoid the sales tax by purchasing materials
   on behalf of UDOT. (A different rule
   applies to purchases of construction materials for schools or religious or
   charitable organizations.)

10. If a
    contractor purchases construction materials, then gives those materials to the
    subcontractor for installation as part of a real property contractor, the
    contractor is liable for sales tax on the purchase of the materials. The subcontractor�s charges to install the
    construction materials to real property are not taxable.

Note,
however, that charges to install an item of personal property in connection
with another item of personal property are taxable. In other words, if the item is not affixed
to real property upon installa tion, the installation charges are taxable. For instance, assume that you lease
scaffolding for use on the project, and the lessor installs it by assembling it
on the work site. Unless the
scaffolding is actually affixed to real property, the installation charges are
taxable.

11. The
    tax rate in Salt Lake County for areas in which the freeway construction will
    take place is 6.125% If the
    construction passes into Utah County, contact us for information about the
    appropriate tax rate.

In
response to questions raised in your letter of October 21, we offer the
following advice:

12. You have
    described a situation in which a subcontractor fabricates a �movable� item away
    from the construction site, then installs it on site. We assume that you are envisioning an item that is fabricated as
    an item of tangible personal property, but is converted to real property upon
    installation. For instance, a
    subcontractor may fabricate concrete �jersey barriers� off site, then transport
    them to the work site and place them in position as a permanent part of the roadway. The last person to own them as tangible
    personal property before they are converted to real property is liable for the
    tax. If the subcontractor owned the
    them at the time of conversion, the subcontractor, as the final consumer, is
    liable for the tax on the materials used to fabricate them. If the general contractor owned the
    materials or the barriers at the time of conversion, the general contractor is
    liable for the tax. This is true even
    if the subcontractor, acting on behalf of the general contractor, put them in
    place along the roadway. In either
    case, the charge by a subcontractor to the general contractor is not subject to
    sales tax.

13. As in
    the example above, if the subcontractor is the last person to own the
    construction materials as tangible personal property, the subcontractor is
    liable for the amount paid to purchase those materials. If the general contractor owns the materials
    and hires a subcontractor to use them to fabricate a finished product, the
    general contractor is liable for the tax on the materials.

14. Charges
    by a subcontractor to a contractor are taxable if the subcontractor is selling
    items of tangible personal property to the general contractor. For instance, if a subcontractor builds
    steel I-beams, then sells the I-beams to the general contractor before they are
    converted to real property, the sale between the subcontractor and general
    contractor is subject to tax. The
    general contractor, as the final consumer, is liable for the tax.

We
realize this is a confusing area of tax law.
If you have other questions or concerns, please let us know how we can
help you.

For
the Commission,

Joe
B. Pacheco,

Commissioner