California Governor Gavin Newsom signed Senate Bill 122 on June 29, 2026, ending the state's longstanding exemption on cloud-based and downloaded software. Beginning January 1, 2027, sales and use taxes will apply to all prewritten software—including SaaS and AI tools—regardless of delivery method. This marks a major shift for businesses purchasing software services in the state, with significant financial and compliance implications.
- California taxes all prewritten software and SaaS from January 2027
- Tax rates vary between 7.25% and 10.75% depending on location
- $5M vendor threshold shifts tax remittance duty to buyers
What happened
On June 29, 2026, California Governor Gavin Newsom signed SB 122 into law, effective January 1, 2027. The bill expands California’s sales and use tax to cover all prewritten software products, regardless of how they are delivered—including downloads, streaming, and SaaS accessed via browsers. Previously, California only taxed prewritten software sold on physical media like discs, making it the last large state to exempt cloud-based software sales from tax.
By redefining 'tangible personal property' to include digital products such as prewritten software transferred electronically or accessed remotely, California aligns with over 20 other states that tax SaaS in some form. The state estimates the new tax provisions will generate approximately $2 billion in combined state and local revenue annually.
Why it matters
For software consumers, this change means a direct jump in costs, typically between 8% and 10% on software budgets, depending on local tax rates. For example, a business spending $2 million annually on software tools could face an additional $160,000 to $200,000 in tax expenses without receiving additional value. These costs stack on top of vendor price increases, potentially inflating renewal bills by 15-17%. Unlike VAT systems, these sales taxes do not provide credit or refund options and reduce gross margins.
Vendors and founders of SaaS companies face new obligations to collect and remit sales tax, impacting billing structures and compliance processes. The law treats most B2B software products as taxable prewritten software, including those initially custom-developed and later sold repeatedly. The complexity of bundled offerings also matters, as unbundled services like support and implementation may be non-taxable, while bundled contracts billed as single line items are taxed in full.
What to watch next
Buyers should immediately consult their top vendors to understand how invoicing and tax collection will change as of January 1, 2027. Large purchasers also need to prepare for use tax self-assessment responsibilities if their purchases with a single vendor exceed $5 million annually, including registering with tax authorities and managing exemption certificates. This new process introduces a significant administrative burden for finance teams unfamiliar with these tasks.
For vendors, staying compliant will require updated billing systems capable of applying the correct tax rates by customer location, tracking thresholds for tax responsibilities, and clear communication on bundled product taxability. Failure to comply could result in penalties, so businesses should monitor guidance from the California Department of Tax and Fee Administration and engage tax advisors to adapt their operations ahead of the January implementation.