Is cleaning commercial sewer and drain lines taxable, and does it matter whether the cleaning is done on a schedule versus only when the line clogs?

Plain-English summary

A business asked the Comptroller about sales tax on drain line preventive maintenance for commercial property. The answer draws a careful line between taxable repair and nontaxable maintenance of nonresidential real property.

Cleaning sewer and drain lines for commercial real property is a taxable nonresidential real property repair service — UNLESS the service is performed as part of a genuinely periodic and scheduled maintenance program. "Maintenance" under Rule 3.357 means scheduled, periodic work necessary to sustain safe, efficient, continuous operations, or to prevent decline, failure, or deterioration of a real property improvement. Rule 3.357(a)(4)(A) and (B) define "scheduled" as anticipated and designated to occur within a given time period or production level, and "periodic" as ongoing, continual, or occurring at generally predictable intervals. The letter draws a sharp contrast with a separate category: periodic and scheduled real property services — an enumerated list that includes things like janitorial work and garbage collection under Rule 3.356 — are ALWAYS taxable no matter how they're scheduled; being on a schedule doesn't exempt those. Grease trap cleaning is called out specifically: if the grease trap is NOT connected to the sewer lines (i.e., an enclosed system), cleaning it is a taxable real property service with no exemption, even if performed on a schedule. Finally, the letter resolves the practical trigger question directly: if a customer requests drain line cleaning only when the line is actually clogged, that reactive service is a taxable nonresidential real property repair, not maintenance — regardless of how routinely clogs happen to occur.

What this means for you

Plumbing and drain-cleaning companies serving commercial customers

Whether a drain-line cleaning job is taxable often comes down to how the customer requests it: a true recurring maintenance contract (cleaning scheduled at set intervals, not triggered by a clog) can be nontaxable maintenance, while cleaning called in response to an actual clog is always taxable repair. Structure and document your recurring-maintenance contracts to reflect genuine scheduling, not reactive dispatch.

Commercial property owners setting up preventive maintenance contracts

If you want your drain-line cleaning to qualify as nontaxable maintenance rather than taxable repair, the contract needs to specify real, predictable intervals — not "as needed" or "when clogged" language, which defaults to taxable repair.

Businesses with grease traps

Don't expect grease trap cleaning to escape tax by putting it on a maintenance schedule — if the trap isn't connected to the sewer lines, cleaning it is always a taxable real property service, schedule or no schedule.

Common questions

Q: Is cleaning commercial sewer and drain lines taxable?
A: Yes, as a nonresidential real property repair service, unless it's performed as part of a genuinely scheduled and periodic maintenance program.

Q: What makes drain-line cleaning "maintenance" instead of "repair"?
A: It must be scheduled (anticipated/designated to occur within a set time period or production level) and periodic (ongoing or recurring at generally predictable intervals) under Rule 3.357(a)(4).

Q: Is cleaning triggered by an actual clog ever nontaxable maintenance?
A: No — cleaning requested only when the line is clogged is a taxable repair service, not maintenance, regardless of frequency.

Q: Is grease trap cleaning ever exempt as scheduled maintenance?
A: No, if the grease trap is not connected to the sewer lines (an enclosed system) — that cleaning is always a taxable real property service under Rule 3.356.

Q: Can other drain-cleaning businesses rely on this exact letter?
A: No. 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 facts with a tax professional.

Citations and references

Rules:

• 34 Tex. Admin. Code § 3.357 (Nonresidential Real Property Repair or Remodeling; maintenance definition)
• 34 Tex. Admin. Code § 3.357(a)(4)(A), (B) ("scheduled" and "periodic" defined)
• 34 Tex. Admin. Code § 3.356 (Real Property Services)

Source

• STAR search: https://star.comptroller.texas.gov/search?doc_type_code=L&tax_type_code=SST
• Opinion: https://star.comptroller.texas.gov/view/200009666L

Original ruling text

September 5, 2000

Dear **:

I am responding to your inquiry regarding sales tax on drain line preventive
maintenance.

Cleaning sewer and drain lines for commercial real property is a taxable
nonresidential real property repair service unless the service is performed as
part of a periodic and scheduled maintenance schedule. Maintenance means the
scheduled, periodic work necessary to sustain or support safe, efficient,
continuous operations, or to prevent the decline, failure, lapse, or
deterioration of real property improvement. See Rule 3.357 concerning real
property maintenance.

The term "scheduled" means anticipated and designated to occur within a given
time period or production level. The term "periodic" means ongoing or
continual or at least occurring at intervals of time or production that are
generally predictable. See Rule 3.357(a) (4)(A) and (B) concerning maintenance
of real property.

Periodic and scheduled real property services are taxable (e.g. janitorial,
garbage collection, etc). Charges to clean grease traps that are not connected
to the sewer lines (i.e., an enclosed system) are taxable real property
services. There is no exemption even if the service is scheduled or periodic.
See Rule 3.356 concerning Real Property Services.

If your customer requests the drain line cleaning only when the line is
clogged, the cleaning is considered a taxable nonresidential real property
repair service rather than the maintenance of real property.

If you have Internet access you may view or down load Rules 3.356 and 3.357, by
going to our web site address at
and
scrolling 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 13825, Austin, Texas 78711-3825.

Sincerely

Emilio S. Lerma
Tax Policy Division