Is replacing a hot water hydronic coil and altering the ductwork in a heating system a tax-exempt capital improvement, or a taxable real-property repair?

Plain-English summary

An HVAC contractor replaced a hot water hydronic coil in a heating system, and the job required altering the ductwork: it removed three feet of supply duct, fabricated new "adaption" ductwork from custom galvanized sheet metal, installed a custom coil box, and used a transition piece to tie the new duct into the main supply ducting. It asked whether this counts as a capital improvement (not taxable to the customer) or a taxable repair. The Department concluded it is a capital improvement and not subject to sales tax — while flagging that the contractor still owes tax on the materials it used.

New York taxes the service of maintaining, servicing, or repairing real property (Tax Law § 1105(c)(5)), but capital improvements are excluded. A capital improvement is an addition or alteration to real property that meets all three prongs of Tax Law § 1101(b)(9)(i): (A) it substantially adds value or appreciably prolongs the property's useful life; (B) it becomes part of or is permanently affixed to the real property so that removal would cause material damage; and (C) it's intended to be permanent. Whether a real-property job is a taxable repair or an exempt capital improvement turns on the end result of the work (20 NYCRR 527.7(b)(4)).

This is a close call, and the Department was candid about it: normally, replacing a blower, coil, compressor, or valve in a heating system is a taxable repair of real property (Publication 862, pp. 17–18). But here the coil replacement required fabricating and integrating new ductwork that appreciably prolonged the useful life of the real property, was intended as a permanent installation, and couldn't be removed without causing material damage to the ductwork. Meeting all three prongs, the end result was a capital improvement, so the contractor's charge to the customer isn't taxable. Importantly, the contractor is treated as the consumer of the materials it incorporates and must pay sales/use tax on those materials (Tax Law § 1101(b)(4)).

What this means for you

HVAC and other building-trades contractors

A like-for-like part swap (coil, blower, compressor, valve) is usually a taxable repair — you charge the customer tax on the job. But when the work goes further — fabricating and permanently integrating new ductwork or components that prolong the building's useful life and can't be removed without material damage — it can rise to a capital improvement, which is not taxed to the customer. The deciding factor is the end result of the whole job, not the label. When it qualifies, get a properly completed Form ST-124 (Certificate of Capital Improvement) from the customer and keep it.

You still pay tax on your materials

A capital improvement being non-taxable to the customer does not make your materials tax-free. As the contractor, you're the end user of the galvanized sheet metal, coil box, screws, caulk, etc., and you owe sales or use tax on those purchases (Tax Law § 1101(b)(4)). Build that into your pricing.

Property owners

If a contractor performs a true capital improvement, they shouldn't charge you sales tax on the labor/job (you'd sign Form ST-124). If the work is a repair or simple part replacement, expect tax on the charge. Ask which classification applies and why — it depends on the end result.

Accountants and tax professionals

This is a fact-driven application of the § 1101(b)(9)(i) three-prong test and the § 527.7(b)(4) end-result rule against the Publication 862 default that coil/blower/compressor/valve replacements are taxable repairs. The differentiator was the fabricated, permanent ductwork integration prolonging useful life with removal causing material damage. Don't generalize "coil replacement = capital improvement"; the outcome hinges on the scope and permanence of this particular job.

Common questions

Q: Isn't replacing a heating coil just a taxable repair?
A: Usually, yes — Publication 862 treats coil/blower/compressor/valve replacements as taxable repairs of real property. This job qualified as a capital improvement only because it required fabricating and permanently integrating new ductwork that prolonged the property's useful life and couldn't be removed without material damage.

Q: So the customer pays no sales tax?
A: Right — a capital improvement isn't taxed to the customer (use Form ST-124). But the contractor pays sales/use tax on the materials it incorporates (Tax Law § 1101(b)(4)).

Q: How do I tell a repair from a capital improvement?
A: Apply the three-part test in Tax Law § 1101(b)(9)(i) and look at the end result of the work (20 NYCRR 527.7(b)(4)). All three prongs — value/useful-life, permanence with material damage on removal, and intent to be permanent — must be met.

Q: Can I rely on this opinion?
A: No. An Advisory Opinion binds the Department only as to the petitioner and the exact facts presented. It illustrates the Department's reasoning but cannot be relied on by another taxpayer, especially given how fact-specific the capital-improvement analysis is.

Citations and references

Statutes and regulations:
- Tax Law § 1105(c)(5) (sales tax on maintaining, servicing, or repairing real property)
- Tax Law § 1101(b)(9)(i) (three-part definition of capital improvement)
- Tax Law § 1101(b)(4) (contractor pays sales/use tax on materials it incorporates)
- 20 NYCRR 527.7 (capital improvement vs. repair; end-result test at (b)(4))

Department guidance referenced: Publication 862 (Sales and Use Tax Classifications of Capital Improvements and Repairs to Real Property), pp. 17–18; Form ST-124 (Certificate of Capital Improvement).

Source

• Landing page: https://www.tax.ny.gov/pubs_and_bulls/advisory_opinions/sales_ao.htm
• Opinion: https://www.tax.ny.gov/pubs_and_bulls/advisory_opinions/sales/24-37s.htm
• Printer-friendly PDF: https://www.tax.ny.gov/pdf/advisory_opinions/sales/a24-37s.pdf

Original ruling text

Sales Tax
August 20, 2024
Office of Counsel

The Department of Taxation and Finance (“the Department”) received a Petition for Advisory Opinion from [ redacted ] (“Petitioner”). Petitioner asks whether a hot water hydronic coil replacement and alterations to duct work in a heating system is considered a capital improvement. We conclude that Petitioner’s replacement of a hot water hydronic coil, which required duct alterations in a heating system, is considered a capital improvement and is not subject to sales tax.

Facts

Petitioner repairs, installs, and services heating, ventilation, and air conditioning (HVAC) units. Specifically, Petitioner replaced a hot water hydronic coil, which required duct alterations in a heating system. Petitioner first removed three feet of supply ducting and then fabricated new adaption duct work. Petitioner then installed a custom coil box. Finally, Petitioner used a transition piece to connect the new adaption duct work to the rest of the main supply ducting. All of the work was done using custom galvanized sheet metal ducting. Petitioner asks whether this replacement is considered a capital improvement and therefore not subject to sales tax.

Analysis

Tax Law Section 1105(c)(5) imposes sales tax on receipts from every sale of the services of maintaining, servicing or repairing real property, but distinguishes these taxable services from adding to or improving the real property by a capital improvement. A capital improvement is defined in Section 1101(b)(9)(i) as an addition or alteration to real property that: (A) substantially adds to the value of the real property, or appreciably prolongs the useful life of the real property; (B) becomes part of the real property or is permanently affixed to the real property so that removal would cause material damage to the property or article itself; and (C) is intended to become a permanent installation.

Services to real property are classified as either a capital improvement or a repair, maintenance or installation service. Petitioner replaced a hot water hydronic coil, which is a part of the heating system, and did not replace the entire system. Generally, the repair or replacement of blowers, coils or compressors valves in a heating system is the repair of real property and is subject to sales tax. See Publication 862, Sales and Use Tax Classifications of Capital Improvements and Repairs to Real Property, pp.17-18. However, Petitioner’s replacement of a hot water hydronic coil, which required alterations to duct work in a heating system, appreciably prolonged the useful life of the real property to which it was added. Removal of the hydronic coil, which was intended as a permanent installation, could cause material damage to the duct work itself. Therefore, the service to real property here is considered a capital improvement and is not subject to sales tax. See Publication 862, p.18. However, any materials that Petitioner incorporated into the capital improvement are subject to tax. Tax Law 1101(b)(4).

DATED: August 20, 2024

Mary Ellen Ladouceur
Principal Attorney

Note: An Advisory Opinion is issued at the request of a person or entity. It is limited to the facts set forth therein and is binding on the Department only with respect to the person or entity to whom it is issued and only if the person or entity fully and accurately describes all relevant facts. An Advisory Opinion is based on the law, regulations, and Department policies in effect as of the date the Opinion is issued or for the specific time period at issue in the Opinion. The information provided in this document does not cover every situation and is not intended to replace the law or change its meaning.