Are Software Licenses Taxable in California? SaaS, Custom, and Cloud

Software licenses in California are taxable when the software is delivered on physical media such as a disc or USB drive, and generally not taxable when delivered as a pure electronic download or accessed through the cloud. The California Department of Tax and Fee Administration (CDTFA) taxes transfers of tangible personal property, defined as anything that can be seen, weighed, measured, felt, or touched. The same program can be taxable or tax-free depending on how it reaches the buyer, and a single contract clause or a bundled backup disc can flip the answer.

The Rule That Controls Every Software Tax Question

California’s sales and use tax reaches only tangible personal property. Regulation 1502 sets out how that principle applies to software, and it draws a hard line between physical and electronic delivery.¹ If a customer walks away with something physical, the transaction is taxable. If everything happens over the internet and no physical object changes hands, it generally is not. The tax follows the medium, not the software.

Prewritten Software on Physical Media

Prewritten software (sometimes called “canned” software) is any program held for general or repeated sale. When it ships on physical media, tax applies to the full amount charged to the customer, including all license fees, site licensing fees, and end-user fees.¹ The relative value of the disc and the license is irrelevant. A $50,000 enterprise license delivered on a $2 USB drive is taxable on the full $50,000.

The tax also applies whether the vendor supplies the storage media or the customer brings it. If the vendor loads software onto a customer-supplied hard drive, that is still a taxable transfer of tangible personal property.¹

Prewritten Software Delivered Electronically

When prewritten software is transferred by remote telecommunications from the seller to the buyer’s computer, and the buyer receives no physical object in the transaction, the sale is not taxable.¹ Standard internet downloads, app store purchases, and any other purely electronic delivery fall into this category.

The exemption is fragile. If the seller also provides a backup copy on physical media as part of the same sale, the entire transaction becomes taxable. The CDTFA is explicit that including a backup flash drive alongside an electronic download makes the whole sale subject to tax, even if the customer never requests or uses the backup.²

License agreements deserve close reading for the same reason. If the end-user license grants the customer the right to receive future updates on physical media, or the right to request a physical backup, that contractual right can establish a taxable transfer from the start. Keeping any physical media option entirely separate, with its own price, is the cleanest way to protect the electronic transaction.

Software Maintenance Agreements

Maintenance agreements trip up more businesses than any other software category. Two questions decide the tax treatment: is the agreement mandatory or optional, and does any physical product get delivered during the contract term?

Mandatory maintenance. If the buyer must purchase maintenance to get the software, the maintenance charges are taxable as part of the software sale, even if listed separately on the invoice.¹
Optional maintenance with physical updates. If the buyer can decline maintenance and buy the software alone but opts in and receives any physical products during the term (such as update discs), 50 percent of the lump-sum maintenance charge is taxable.³
Optional maintenance with only electronic updates. If no tangible personal property is transferred during the maintenance period and all updates arrive electronically, none of the maintenance charge is taxable.¹

The 50 percent rule catches vendors off guard because it applies to the entire lump-sum maintenance charge when any physical product ships during the contract, even a single disc containing one update. Delivering everything electronically avoids the tax entirely.

Custom Software

Custom software written to a single customer’s specifications is not taxable, regardless of how it is delivered. California treats it as a service. Revenue and Taxation Code Section 6010.9 explicitly excludes custom computer programs from the definitions of “sale” and “purchase,” even when the software is handed over on physical storage media.⁴

A program qualifies as custom when it is prepared to the special order of the customer, even if it incorporates preexisting routines or components.¹ Modifying a prewritten program counts as custom programming only to the extent of the actual modification. Changing configuration settings does not turn canned software into a custom program.

When a vendor modifies prewritten software for a customer, the charges for the custom modifications are nontaxable only if they are separately stated on the invoice. If the vendor lumps everything into a single price, the entire charge is taxable as a sale of the prewritten program.¹ Invoice structure directly determines the tax outcome.

Installation, Training, and Consulting Services

When software is sold alongside installation, training, or consulting, the tax treatment of those services depends on whether the customer can buy the software without them.

Installation charges for testing prewritten software on the buyer’s computer are nontaxable. Training charges are generally nontaxable. Consultation charges are nontaxable when the buyer is not required to purchase them to get the software or a maintenance contract.¹

Mandatory bundling is the trap. If the customer must purchase installation, consultation, or other services as a condition of buying the software, those service charges become part of the sale and are taxable, even when they appear as a separate line item.⁵ Separately stating the price is not enough; the services must be genuinely optional.

Training materials work a little differently. If a vendor sells books or manuals to trainees for a separate charge, that charge is taxable as a sale of tangible personal property. If the vendor includes training materials in the price of the software without a separate charge, the value of those materials is treated as part of the taxable software price.¹

SaaS and Cloud Services

Software as a Service, where users access applications hosted on the provider’s servers through a browser or thin client, is not taxable in California. The customer never takes possession of the software code, and the CDTFA treats the arrangement as paying for access to a service rather than acquiring tangible personal property. Infrastructure as a Service (IaaS), where businesses pay for virtualized servers, storage, and networking without receiving any physical equipment, is treated the same way.

Two contract structures can undermine that nontaxable treatment. First, if the service requires the customer to install a client-side component delivered on physical media, the CDTFA can treat the arrangement as a taxable transfer of tangible property; an electronically delivered client-side component preserves the nontaxable result. Second, if the SaaS package includes mandatory hardware such as a preloaded device, the transaction starts to look like a taxable equipment lease. Pricing the hardware separately and clearly labeling the SaaS fee as a service charge protects the treatment.

Technology Transfer Agreements

A technology transfer agreement (TTA) can sharply reduce the taxable amount when prewritten software is sold on physical media alongside patent or copyright interests. Under a qualifying TTA, tax applies only to the tangible personal property portion of the transaction, not to the value of the intellectual property rights being transferred.⁶

To qualify, the seller must actually hold patent or copyright interests in the software and must transfer those interests to the buyer under a written agreement. If the seller is a reseller without ownership of the intellectual property, TTA treatment does not apply and the full sales price is taxable.⁶

The taxable amount under a qualifying TTA is determined in a set order: first, any separately stated reasonable price for the tangible property in the agreement; second, if none exists, the price at which similar tangible property was previously sold to an unrelated party; and third, if neither is available, 200 percent of the cost of materials and labor used to produce the tangible property.⁶ On large enterprise deals, this can mean a dramatically lower tax bill than paying tax on the full license price.

Buying Software From an Out-of-State Vendor

When a California buyer purchases taxable software from an out-of-state vendor that does not collect California sales tax, the buyer owes use tax at the same rate. Use tax is the mirror image of sales tax and prevents buyers from avoiding tax by purchasing outside California.⁷

Businesses with a seller’s permit report the purchase on their sales and use tax return for the period when the item was first used, stored, or consumed in California. Qualified purchasers without a seller’s permit file a use tax return for the prior calendar year by April 15. Individual consumers report use tax on their California income tax return or pay directly to the CDTFA.⁷ Combined state and local rates across California jurisdictions currently range from 7.25 percent to roughly 10.75 percent depending on the city and county.

Penalties for Getting It Wrong

The CDTFA imposes a 10 percent penalty for filing a return late and a 10 percent penalty for paying late, though the combined penalty will not exceed 10 percent of the tax due for the reporting period.⁸ If the CDTFA finds the underpayment resulted from negligence or intentional disregard of the law, a separate 10 percent penalty is added.⁹ Interest also accrues on unpaid balances; for 2026, the CDTFA charges 10 percent per year on deficiencies, applied monthly at a rate of 0.00833.¹⁰ On a six-figure software transaction, even a few months of underpayment produces a meaningful bill.

Because taxability so often turns on delivery method and contract terms rather than the software itself, documentation matters. Invoices that separately state taxable and nontaxable components, license agreements showing the delivery method, and records of how updates and maintenance were provided all need to be preserved for at least four years.¹¹

1
California Department of Tax and Fee Administration. Regulation 1502 – Computers, Programs, and Data Processing
2
California Department of Tax and Fee Administration. Internet Sales (Publication 109) – Nontaxable Sales
3
California Department of Tax and Fee Administration. Warranties and Maintenance Agreements (Publication 119)
4
California Department of Tax and Fee Administration. California Revenue and Taxation Code 6010.9 – Sale and Purchase Custom Computer Program
5
California Department of Tax and Fee Administration. Sales and Use Tax Annotations 120.0532 – Software Installation Charge
6
California Department of Tax and Fee Administration. Software Technology Transfer Agreements
7
California Department of Tax and Fee Administration. California Use Tax, Good for You. Good for California
8
California Department of Tax and Fee Administration. Interest, Penalties, and Collection Cost Recovery Fee
9
California Department of Tax and Fee Administration. Sales and Use Tax Law – Section 6484
10
California Department of Tax and Fee Administration. Interest Rates
11
California Department of Tax and Fee Administration. Regulation 1698 – Records