Sales Tax on Cleaning Services in Connecticut (2025)

Connecticut Defines Janitorial Services in Regulatory Detail, Then Carves Out the Casual Cleaner

Connecticut is one of the few states with an actual regulatory definition of what "janitorial services" means for tax purposes. Conn. Gen. Stat. §12-407(a)(37)(Y) enumerates janitorial services among the specifically taxable service categories, and the implementing regulation, Conn. Agencies Regs. §12-407(2)(i)(Y)-1, spells out exactly what falls inside that definition: cleaning floors, walls, ceilings, and woodwork; carpet and upholstery cleaning; disinfecting restrooms; waxing; dusting; vacuuming; and trash removal performed as part of a cleaning contract. That level of specificity means Connecticut auditors rarely argue about whether a service qualifies. The dispute, when it happens, is almost always about the "casual sale" exception.

The regulation exempts what it calls a casual sale: cleaning performed at no more than three residences per year by an individual who is not otherwise in the cleaning trade as a business. This exists to keep a neighbor who cleans a few houses on the side out of the sales tax registration system. It does not apply to any registered business, no matter how small, and it does not apply once you cross the three-residence threshold in a calendar year, even informally. If you are operating under an LLC or taking payment through a business bank account, you are not a casual seller regardless of volume.

Connecticut Janitorial Service Line Items and Their Tax Treatment

Sourcing Rules and the myconneCT Filing Process

Connecticut sources janitorial services to the location of the real property being serviced, not to where your business is headquartered and not to where the invoice gets mailed. A New Haven-based cleaning company servicing a client's warehouse in Hartford collects and remits tax based on Hartford's applicable rate rules, though Connecticut is unusual in that it applies one flat statewide rate with no local add-on: 6.35 percent everywhere, no exceptions for city or county. That flat structure actually simplifies compliance considerably compared to home-rule states like Alabama or Louisiana, since you never need a jurisdiction lookup table, just the single statewide rate applied to every taxable invoice regardless of which town the crew works in.

Returns and payments go through the myconneCT online portal using Form OS-114, the state's general sales and use tax return. Filing frequency is assigned based on liability volume, monthly for most active commercial cleaning operations, and Connecticut's Department of Revenue Services enforces electronic filing for nearly all registered accounts at this point, so budget for that infrastructure from your first day of operation rather than treating it as an upgrade decision later.

Worked Example: A $10,000 Monthly Contract Serviced Across Two Towns

Because Connecticut applies a single flat 6.35 percent rate statewide, the math does not change based on which town your crews are working in during a given billing cycle, which is a real operational advantage. A $10,000 monthly janitorial contract, whether performed entirely in Stamford or split across Stamford and Bridgeport locations for the same client, generates the same tax liability: $10,000 × 0.0635 = $635 in sales tax collected from the client and remitted to DRS via myconneCT. Compare that to a home-rule state where the same $10,000 contract split across two municipalities could require two separate rate calculations on two segments of the same invoice. Connecticut's flat-rate structure means your invoicing software needs exactly one tax rate configured for the entire state, which is one less thing to get wrong during rapid geographic expansion.

The Casual-Sale Line Businesses Misread

New solo cleaners sometimes assume the casual-sale exception gives them a grace period while they build a client base, register once they hit some revenue threshold. That is not how the regulation works. The exception is about business structure and residence count, three or fewer per year, performed by someone not in the cleaning trade, not about total dollars earned. A person cleaning one house every week for a single client, earning modest income, does not qualify for the casual exception if that is their trade; the exception is aimed at a genuinely occasional arrangement, like a family friend helping out a few times a year, not a part-time cleaning business. If you have registered an LLC, advertised your services, or taken on the account as recurring commercial work, treat yourself as a taxable seller from day one and register with DRS before issuing your first invoice, regardless of how few residences you currently serve.

The department's Informational Publication 2018-12 remains the reference practitioners reach for on services subject to tax in this state, and it is more usable at the invoice level than the statute because it works through categories rather than definitions. Contractors serving accounts across the New York and Massachusetts lines should pair it with the AICPA state and local tax resource center, since the three states classify cleaning labor differently enough that one regional rate card cannot carry a single tax assumption.

Registration Timing and What DRS Checks First

Connecticut's Department of Revenue Services issues a Sales and Use Tax Permit before a business may legally collect tax, and the application asks directly about business structure, advertising activity, and expected client volume, information DRS uses to assess whether a registrant is a genuine casual seller or a business that should be collecting from day one. Businesses that register late, after operating for months on the assumption the casual exception applied, often face a records request covering the entire unregistered period, since DRS wants to confirm the exception was properly claimed for every job performed before registration, not just going forward. Keeping a simple running log of residences serviced by calendar year, even before you think you need to register, makes that conversation straightforward if it ever comes up, rather than requiring you to reconstruct a year of informal work from memory or bank deposits.

For businesses that do register, myconneCT also handles use tax reporting on any out-of-state equipment or supply purchases where Connecticut tax was not collected at the time of sale, a detail worth building into your monthly bookkeeping routine alongside the standard OS-114 sales tax filing, since DRS treats these as two related but separately reportable obligations on the same account.