California Governor Newsom Signs SB 122, Extending Sales Tax to SaaS and AI Tools Effective January 1, 2027

On June 29, 2026, California Governor Gavin Newsom signed Senate Bill 122 (SB 122) into law, fundamentally altering the state’s approach to taxing digital products. Effective January 1, 2027, California’s sales and use tax will apply to prewritten software and Software-as-a-Service (SaaS), regardless of how it is delivered—whether downloaded, streamed, or accessed via a browser. This includes various Artificial Intelligence (AI) tools and platforms, which the state will treat as prewritten software.

This legislative action marks a significant shift for California, which has historically taxed prewritten software transferred on physical media but exempted electronically delivered software and remotely accessed SaaS. For decades, the state maintained a distinction, taxing software on a disc but not its browser-based counterpart. With SB 122, California now joins over 20 other states that tax SaaS in some form, ending its status as a major holdout in this area. The state projects this change will generate approximately $2 billion annually in combined state and local revenue.

The new tax rate will reflect California’s full stack of sales and use taxes, comprising a 7.25% state rate plus applicable local district taxes. Depending on the purchaser’s address, the total rate could range from 7.25% to about 10.75%, typically hovering between 8-10% for most customers in major metropolitan areas. This increase will directly impact both businesses purchasing software for their operations and software vendors selling into the California market.

For businesses operating within California, the change means an immediate increase in the cost of essential digital tools. Companies that license cloud-based Enterprise Resource Planning (ERP), Customer Relationship Management (CRM), and cybersecurity software, for instance, will likely see their vendors begin collecting California sales tax on subscriptions that were previously exempt. This necessitates a thorough review of existing vendor contracts, an evaluation of indirect tax processes, and a re-assessment of technology budgets to account for these additional costs.

We've observed that many small and mid-sized businesses, already navigating complex operational landscapes, often underestimate the ripple effect of such legislative changes. While the headline focuses on an 8-10% price increase, the true impact extends to compliance costs, system adjustments, and potential cash flow implications. Our view at C&S Finance Group LLC is that proactive engagement with these new regulations is not just about avoiding penalties, but about maintaining financial stability and competitive advantage. We regularly guide clients through intricate tax law changes, and this situation underscores the critical need for expert tax preparation and compliance services. Businesses needing assistance in understanding and implementing these changes can contact C&S Finance Group LLC at csfinancegroup.com.

SB 122’s impact extends significantly to software vendors, many of whom may now be required to register with the California Department of Tax and Fee Administration (CDTFA) for the first time. The bill did not create new nexus thresholds but rather made software sales count toward the existing ones: physical presence in California or $500,000 in California sales for remote sellers. This means a substantial number of B2B companies that have not previously dealt with California sales tax compliance will soon become registrants, needing to adjust their billing systems, tax engines, customer contracts, and invoicing procedures.

Legally, SB 122 amended the definition of “tangible personal property” to encompass “digital products,” specifically prewritten computer software transferred on physical media, electronically, or accessed remotely. This approach integrates software into the state’s existing sales tax framework rather than establishing an entirely new tax category. The legislation also alters the treatment of technology transfer agreements (TTAs), now including digital products and associated copyrights and patent interests within the definition of tangible personal property, thereby making the software component of TTAs taxable.

Determining the correct sales tax will depend on sourcing rules, which dictate that remote sales are assigned to the purchaser’s known California address, following a priority order: billing address, then shipping or delivery address, then the address on the payment instrument, and finally the mailing address. A presumption of California use will apply to anything bought outside the state but used within California within 90 days.

Despite the broad expansion, SB 122 is narrower than some other states’ digital tax regimes, retaining several exemptions. Custom software remains untaxed, as do digital assets, audio and audiovisual works, books, digital infrastructure, video games, and visual works. This distinction means companies must carefully classify their offerings to ensure proper tax application.

For vendors and purchasers alike, the period leading up to January 1, 2027, is crucial for preparation. Software providers must determine which of their products will become taxable and implement necessary changes to their internal systems. Purchasers should review their technology spend and prepare for increased costs. The California Department of Tax and Fee Administration is expected to issue further guidance before the effective date, which will be vital for businesses to ensure full compliance.

This legislative pivot underscores the evolving landscape of digital taxation and the increasing complexity for businesses operating across state lines. As California adapts its tax code to reflect modern consumption patterns, companies will need to remain vigilant in monitoring regulatory updates and adjusting their financial strategies accordingly.