1. The General Rule: Tangible Personal Property vs. Services
In the United States, retail sales tax was historically designed to tax sales of Tangible Personal Property (TPP)—physical physical goods like lumber, tools, vehicles, and electronics. Services (intangible labor, expertise, and consulting) were historically exempt.
Over recent decades, however, state revenue departments have increasingly expanded their tax codes to cover service categories. Today, whether a service is subject to sales tax depends entirely on:
• The specific state where the work is performed or delivered (sourcing rules).
• The type of service (professional consulting vs. tangible repair labor vs. personal grooming).
• Whether physical materials or parts were installed during the job.
2. The States That Tax Services Broadly
While the majority of states only tax services that are specifically enumerated in their state statutes, four states take the reverse approach—presuming that all services are taxable unless an explicit statutory exemption exists:
• Hawaii (General Excise Tax - GET): Taxes virtually all services (accounting, legal, consulting, and contracting labor) at a 4.0% base rate plus county surcharges (up to 4.712% effective).
• New Mexico (Gross Receipts Tax - GRT): Imposes GRT on the privilege of doing business, broadly taxing professional and contractor services at combined state/local rates ranging from 5.125% to over 9%.
• South Dakota: Explicitly taxes professional, repair, and technical services by default under its 4.2% state sales tax plus municipal taxes.
• West Virginia: Imposes its 6% consumer sales and service tax on most service labor, with specific exemptions for professional services.
3. Contractor Rules: Capital Improvements vs. Repairs
For trade contractors (plumbers, electricians, carpenters, roofers, HVAC technicians), sales tax compliance hinges on distinguishing between Capital Improvements and Routine Repairs:
• Capital Improvement: Work that permanently enhances the real property value, prolongs its useful life, or adapts it to a new use (e.g., building a complete room addition, installing a new central HVAC system, or laying a new concrete foundation). In states like New York, New Jersey, and Ohio, labor for a capital improvement is exempt from sales tax if the client signs a formal Certificate of Capital Improvement (e.g., NY Form ST-124).
• Repair & Maintenance: Work that restores existing equipment or surfaces to working condition (e.g., replacing a broken water valve, unclogging a drain, or patching a drywall hole). In many states, repair labor is fully subject to sales tax.
4. The Lump-Sum Trap: Why You Must Separate Materials and Labor
One of the costliest audit mistakes trade contractors make is issuing 'lump-sum' invoices that bundle materials and labor into a single price (e.g., 'Bathroom Plumbing Rough-In – $4,500').
If state tax auditors review a lump-sum invoice where qualifying labor could have been exempt, state regulations typically state that if materials and labor are not separated on the invoice, the entire total becomes taxable at the full rate.
Best Practice Rule: Always itemize materials and labor on separate lines on your PDF invoice. Clearly label taxable physical supplies and non-taxable labor lines to ensure audit-proof compliance.
5. Economic Nexus for Digital & Remote Service Providers
Under the landmark US Supreme Court decision in South Dakota v. Wayfair (2018), businesses can be required to collect and remit sales taxes even if they have zero physical presence (no office, employees, or warehouse) in that state.
If your business delivers remote services (such as digital marketing, custom software development, engineering, or architectural designs) to out-of-state clients, you trigger 'economic nexus' once your sales exceed that state's statutory threshold—typically $100,000 in gross annual sales.
Once you cross an economic nexus threshold in a state that taxes your service category, you must register with that state's Department of Revenue before collecting sales tax.
Tax Compliance & Professional Advice Disclaimer
State sales tax statutes, local county surcharges, and service exemptions change frequently and vary by municipality. The information provided in this guide is for educational purposes only and does not constitute formal tax or accounting advice.
Always consult a licensed Certified Public Accountant (CPA) or sales tax attorney in your jurisdiction to confirm your business's specific filing obligations and resale certificate requirements.
Frequently Asked Questions
Do contractors charge sales tax on labor?
It depends on your state and whether the job is classified as a capital improvement or a repair. In many states, labor for permanent capital improvements is sales-tax-exempt, whereas labor for routine repairs and maintenance is taxable.
What happens if I don't separate materials and labor on an invoice?
If you issue a lump-sum invoice without separating materials and labor, many state tax authorities will treat the entire project total as taxable tangible personal property, creating substantial back-tax and penalty exposure in an audit.
Which states tax all services by default?
Hawaii (via its General Excise Tax), New Mexico (via its Gross Receipts Tax), and South Dakota tax services broadly by default unless a specific statutory exemption applies.
Official Documentation & Tax References