In Colorado, sales tax on labor generally doesn’t apply: the state’s 2.9% sales tax covers tangible personal property and a short list of named services, and pure labor sits outside that base.1Department of Revenue – Taxation. Sales and Use Tax Frequently Asked Questions Two conditions keep labor exempt in practice. The labor has to be genuinely separable from any goods involved in the job, and the labor charge has to appear as its own line on the invoice or contract. Miss either one and the entire charge can become taxable.
When Labor Charges Become Taxable
Two situations flip labor from exempt to taxable: fabrication and bundled pricing.
Fabrication labor is taxable because the work brings a new product into existence. A furniture maker who builds a custom dining table owes sales tax on the full selling price, labor included, even if labor and materials are itemized separately.1Department of Revenue – Taxation. Sales and Use Tax Frequently Asked Questions You can’t sell the table without the labor that made it, so the labor rides with the product.
Bundled pricing is the more common trap. Quote a customer “$800 for parts and labor” as one number, and the entire $800 becomes taxable. Quote “$500 for parts” and “$300 for labor” as separate line items, and only the $500 is taxed.1Department of Revenue – Taxation. Sales and Use Tax Frequently Asked Questions The invoice format decides the tax result.
How to Invoice So Labor Stays Exempt
The separately-stated rule is the single most important habit for any Colorado business that charges for both labor and parts. Two conditions have to be met: the labor must be genuinely separable from the tangible property being sold, and the charge must appear as its own line on the invoice or contract.1Department of Revenue – Taxation. Sales and Use Tax Frequently Asked Questions
“Separable” means the customer could, in principle, buy the labor without the property or the property without the labor. Repair labor passes easily. A technician diagnoses a broken appliance and installs a replacement part; the diagnostic and installation work exists independently of the part itself. Fabrication labor fails because the labor and the finished product are the same transaction.
On the invoice, list labor hours and rates on their own line, apart from parts, materials, and anything else taxable. A vague “service charge” dropped in with product costs won’t satisfy the requirement. The clearer the separation on paper, the stronger the position in an audit.
Construction Contracts
Construction is where Coloradans most often bump into the labor question, and the contract structure controls the outcome.
Lump-Sum Contracts
In a lump-sum contract, the contractor gives one price for the whole job. The contractor is treated as the consumer of the building materials, pays sales tax at the supply store, and does not collect sales tax from the customer.2Department of Revenue – Taxation. Sales 6 – Contractors and Retailer-Contractors The homeowner sees one number with no sales tax added; the tax cost is already inside the price.
Time-and-Materials Contracts
Under a time-and-materials contract, materials and labor are priced separately. The contractor acts as a retailer of the materials, buys them without paying sales tax, and then collects sales tax from the customer on the marked-up materials price. Labor stays nontaxable.2Department of Revenue – Taxation. Sales 6 – Contractors and Retailer-Contractors
Installation labor works the same way. A retailer-contractor should not charge tax on installation or labor as long as those charges are listed separately on the bid, invoice, or contract.2Department of Revenue – Taxation. Sales 6 – Contractors and Retailer-Contractors
Repair and Maintenance
Repair work is where the separately-stated rule pays off directly. When a mechanic replaces a water pump, the pump is taxable tangible personal property but the labor to install it is not, so long as the invoice breaks them apart. Appliance repair, HVAC service, and electronics repair follow the same pattern.
Maintenance contracts get their own treatment, and the word “optional” is what matters. An optional maintenance agreement sold as a separate purchase is not itself subject to sales tax at the time of sale. The business performing the work then pays sales or use tax on the parts and materials it uses during the maintenance.3Colorado Department of Revenue. PLR-15-008 – Section: Optional Contracts If the agreement is mandatory, bundled with the sale of the product and not separately priced, it becomes part of the taxable transaction.4Colorado Department of Revenue. GIL-17-006 – Section: Discussion
Home-Rule Cities Can Set Their Own Rules
The 2.9% state rate is only the starting point. Cities, counties, and special districts add their own sales taxes. When the state Department of Revenue collects a local tax on behalf of a jurisdiction, that local tax generally follows the same rules as the state tax, so a service exempt at the state level is usually exempt locally too.5Department of Revenue – Taxation. Local Government Sales Tax
Home-rule cities are the exception. Dozens of Colorado municipalities have adopted home-rule charters and administer their own sales taxes, and they can define what’s taxable on their own terms. A labor charge that’s exempt under state law can be treated differently in a home-rule city.5Department of Revenue – Taxation. Local Government Sales Tax Denver, Aurora, Colorado Springs, Boulder, and Lakewood are among the larger self-collecting cities. If you work in or deliver services into one of them, check that city’s tax code directly rather than relying on the state rules.
Sales Tax on Labor Is Not Income Tax on Earnings
The word “labor” gets used for two very different taxes. Sales tax on labor is about whether the service your business charges a customer for is taxable. Income tax on labor is what you personally owe on the wages or self-employment earnings you take home.
Colorado’s individual income tax is flat. For the 2025 tax year, the rate is 4.4%.6Department of Revenue – Taxation. Individual Income Tax Guide That rate applies to your taxable income no matter how your business handles sales tax. You can provide a service that’s exempt from sales tax and still owe income tax on every dollar of it.
Some Colorado cities also charge an occupational privilege tax, a small flat monthly amount on employees and employers within city limits. It’s not a sales tax and has nothing to do with whether a service is taxable; it functions more like a local payroll tax.