California is set to introduce a major change to its tax framework by extending sales and use taxes to software-as-a-service (SaaS) and other digitally delivered software products beginning January 1, 2027. The move follows the signing of Senate Bill 122 by Governor Gavin Newsom, marking the first time the state will apply sales tax to many forms of remotely accessed software.

The legislation expands California’s definition of taxable property to include certain digital products, including prewritten software that is transferred electronically or accessed through cloud-based platforms. As a result, many SaaS providers serving California customers will be required to collect and remit sales tax on qualifying transactions.

Under the new rules, software accessed remotely through passwords, login credentials, or similar methods will generally be treated as a taxable digital product. However, several categories remain exempt, including custom-built software developed for a single customer, infrastructure-as-a-service (IaaS), platform-as-a-service (PaaS), digital books, streaming media, video games, and cryptocurrency-related assets.

The legislation also introduces sourcing rules that determine tax liability based on a customer's California address. Businesses will need to rely on billing, delivery, payment, or mailing address information to establish where a transaction is taxable. Companies selling digital products to California-based customers may need to update billing systems, contracts, and tax compliance processes before the law takes effect.

Industry experts note that several questions remain unresolved. Hybrid cloud offerings that combine software and infrastructure services could face classification challenges, while businesses providing bundled services such as implementation, training, and support may require additional guidance on separating taxable and non-taxable charges.

The law also includes provisions for large enterprise purchases, allowing certain buyers that exceed annual purchase thresholds to self-assess and remit taxes directly. Additionally, exemptions are available for software intended solely for use outside California.

California's decision aligns it with more than 20 U.S. states that already tax SaaS in some form. As the implementation date approaches, technology companies, software vendors, and digital service providers are expected to closely monitor guidance from the California Department of Tax and Fee Administration regarding compliance requirements and practical application of the new rules.