You can tax labor in California when the work produces a new piece of tangible personal property. Labor that repairs, installs, or simply provides a service is generally not taxable, but only if the invoice separates those charges from any parts or products sold. The statewide base sales and use tax rate is 7.25%, with local additions on top, and the California Department of Tax and Fee Administration (CDTFA) treats fabrication, repair, and installation labor as three distinct categories with different rules.1California Department of Tax and Fee Administration. Regulation 1703 Getting the classification wrong can trigger penalties of 10% to 40% of the unpaid tax.
Fabrication Labor Is Taxable
Fabrication labor is any work that creates, produces, or assembles a new piece of tangible personal property. When labor produces a new physical item, the entire charge is taxable, including hours spent on design, production, and finishing. This holds true even when the customer supplies all the raw materials.2California Department of Tax and Fee Administration. Publication 108 – Taxable Labor
A machine shop tooling a custom component, a tailor cutting and sewing raw fabric into a finished garment, a sign maker producing a custom sign — each is performing taxable fabrication. The labor transforms materials into something new, and that transformation is what triggers the tax. You can’t separate the machining from the machined part.
Printing sits squarely inside this rule. CDTFA Publication 37 states that charges for labor to create printed matter, finished art, illustrations, and brochures are taxable whether the printer supplies the paper or the customer does.3California Department of Tax and Fee Administration. Graphic Design, Printing, and Publishing Typesetting and layout hours cannot be carved out of the taxable base. The whole invoice is subject to tax.
Repair Labor Is Exempt Only if the Invoice Is Right
Labor to fix, restore, or recondition existing tangible property is exempt from sales tax. Replacement parts, being tangible property, are always taxable. The labor to install those parts is not, provided the charges are separated on the invoice.4California Department of Tax and Fee Administration. Labor Charges (Publication 108) – Nontaxable Charges The exemption lives or dies on how you bill the customer.
The 10% Threshold
Regulation 1546 sets the rule that determines the repairer’s obligations. When the retail value of parts and materials in a repair exceeds 10% of the total charge, the repairer is classified as a retailer of those parts and must itemize the invoice. Parts go on one line, taxable. Labor goes on another, exempt.5California Department of Tax and Fee Administration. California Code of Regulations Section 1546 – Installing, Repairing, Reconditioning in General
When parts and materials are 10% or less of the total charge and no separate charge is listed for them, the repairer is treated as the consumer of those parts. The repairer pays tax when buying them and charges the customer nothing additional for tax on parts.5California Department of Tax and Fee Administration. California Code of Regulations Section 1546 – Installing, Repairing, Reconditioning in General
Why Lump-Sum Invoicing Backfires
An auto mechanic who quotes a single flat price for a brake job has created a lump-sum invoice. If parts exceed 10% of that total, which they almost always do in automotive work, the lack of itemization means the CDTFA can treat the entire amount as a taxable sale of parts. The labor exemption is effectively forfeited. If the repairer fails to separate the charges, the burden falls on the business to prove the split, and the CDTFA will otherwise determine the taxable amount from whatever records it can find. For any business doing repair work, line-item invoicing is not optional.
Installation Labor Is Exempt When Separately Stated
Labor charges for installing or applying purchased property are excluded from the tax base as long as those charges are separately stated from the price of the property.5California Department of Tax and Fee Administration. California Code of Regulations Section 1546 – Installing, Repairing, Reconditioning in General The taxable event, the sale of the property, has already happened. Installation is a post-sale service.
A retailer selling a dishwasher and charging separately for delivery and hookup collects tax on the dishwasher price but not the installation fee, provided the invoice shows each charge on its own line. Bury the installation charge in the product price and the full amount becomes taxable.
Construction Contractors Follow Different Rules
Contractors who install materials that become part of real property, such as drywall, plumbing fixtures, or roofing, work under a separate framework. The contractor is treated as the consumer of those materials, paying sales or use tax when purchasing them rather than collecting tax from the customer on the installed job.6California Department of Tax and Fee Administration. Regulation 1521 On a lump-sum construction contract, the customer sees no sales tax line item. The tax was already accounted for upstream in the material cost. The classification turns on whether the finished product is tangible personal property or an improvement to real property.
Pure Services Are Not Taxed
Work that doesn’t result in creating or transferring a physical product falls outside the sales tax entirely. Legal advice, accounting, tax preparation, medical care, tutoring, consulting, and architectural design are all exempt because the client is paying for knowledge and judgment, not a manufactured item.7California Department of Tax and Fee Administration. California Code of Regulations Title 18 Section 1501 – Service Enterprises Generally Regulation 1501 gives the example of a firm providing payroll and bookkeeping services that furnishes binders and forms to clients. The firm is a consumer of those binders, not a retailer. The client is paying for the service, and the incidental property doesn’t trigger tax.
Services in California are exempt unless the legislature specifically brought them into the tax base. That baseline sets the whole framework: labor by itself is not taxed; labor that produces or accompanies a physical product might be.
Software and Digital Products
Software taxation turns on two questions: is the software custom or prewritten, and how is it delivered?
Custom computer programs, meaning software written to the special order of a customer, are not subject to sales tax regardless of how they are delivered. Regulation 1502 is explicit that tax does not apply to a custom program “regardless of the form in which the program is transferred.”8California Department of Tax and Fee Administration. Regulation 1502 Custom programming services are exempt even when performed in connection with a sale of computer equipment. A program still qualifies as custom if it incorporates preexisting routines, as long as it was prepared to the customer’s specific order. Separately stated charges for modifying a prewritten program to meet a customer’s needs also qualify as nontaxable custom programming.
Prewritten or “canned” software is taxable when delivered on physical media like a disk or flash drive.8California Department of Tax and Fee Administration. Regulation 1502 The same prewritten software downloaded electronically without any physical component is generally not taxable.9California Department of Tax and Fee Administration. Internet Sales (Publication 109) – Nontaxable Sales There’s an important catch: if the seller provides a backup copy on physical media alongside an electronic transfer, the entire transaction becomes taxable.
Software as a Service, where the customer pays for ongoing access rather than ownership of a program, is not subject to California sales tax. No tangible property changes hands.
Photography Works the Same Way
When a photographer delivers images in tangible form, whether prints, slides, a flash drive, or a DVD, the entire charge is taxable, including time spent shooting, editing, and any reproduction rights bundled into the price. The CDTFA treats the creation of the physical photograph as fabrication labor. If the photographer transmits images electronically and provides nothing in tangible form, the charges are generally not taxable.10California Department of Tax and Fee Administration. Tax Guide for Photography – Industry Topics Same creative work, same editing hours, same final images. The absence of a physical deliverable keeps it outside the tax base.
Warranty and Maintenance Contracts
Service contracts split by whether they are mandatory or optional.
A mandatory warranty is one the customer cannot opt out of. If the sale of the underlying product is taxable, the mandatory warranty charge is also taxable, whether shown as a separate line item or included in the price.11California Department of Tax and Fee Administration. Warranties and Maintenance Agreements Standard manufacturer warranties on vehicles, appliances, and electronics fall into this category. Mandatory lump-sum maintenance contracts that require the provider to furnish parts and labor produce a similar result: under Regulation 1546, the repairer is considered a retailer of the materials furnished, and the full contract amount is included in the measure of tax.5California Department of Tax and Fee Administration. California Code of Regulations Section 1546 – Installing, Repairing, Reconditioning in General
Optional warranties follow different rules. When a customer chooses to buy an optional service contract and the warranty covers repairs without requiring a deductible, the repairer is treated as the consumer of any replacement parts used. The repairer pays tax on parts at purchase, and the warranty charge to the customer is not taxable.12California Department of Tax and Fee Administration. Warranties and Maintenance Agreements (Publication 119) Optional Warranties If the warranty requires a customer deductible, a portion of the receipts from the parts sale becomes taxable as well.
Contract language carries real weight. An agreement that promises to “furnish all necessary replacement parts” reads very differently to the CDTFA than one focused on “periodic inspection and preventive service.” The first can pull the whole contract into the tax base. The second keeps the labor exempt.
Penalties for Misclassifying Labor
Misclassifying taxable fabrication labor as an exempt service creates real liability. The CDTFA applies a 10% penalty on top of any unpaid tax when the deficiency results from negligence or intentional disregard of the rules.1California Department of Tax and Fee Administration. Regulation 1703 If fraud or intent to evade is involved, the penalty rises to 25%.
The harshest penalty hits businesses that collect sales tax from customers and then fail to remit it. That carries a 40% penalty on the unremitted amount, unless the average shortfall is $1,000 or less per month or the failure was due to reasonable cause.1California Department of Tax and Fee Administration. Regulation 1703 Interest accrues on top of all penalties at a rate tied to the federal underpayment rate plus three percentage points. For a first audit where the business made good-faith efforts at compliance, the CDTFA generally won’t impose negligence penalties, but that leniency evaporates quickly for repeat issues or sloppy recordkeeping.
The most common audit trigger is the lump-sum invoice. A repair shop that bills $800 flat for a job involving $300 in parts and $500 in labor has produced an invoice the CDTFA can tax in full. Across several years of business, those misclassified invoices add up quickly, and the penalties compound the original tax debt.