California's New SaaS Tax: What Businesses Need to Know
Starting 2027, California will tax SaaS and software, impacting buyers and vendors.
1Introduction to SB 122
California Governor Gavin Newsom signed SB 122 on June 29, 2026, effective January 1, 2027. The law expands sales and use tax to include all prewritten software and SaaS, regardless of delivery method. This marks a significant shift from California's previous policy of only taxing physical software media. The state projects $2 billion annually in new revenue from this change, joining over 20 other states that already tax SaaS in some form.
2Tax Rates and Impact
The new tax applies California's full sales tax stack: 7.25% state tax plus local district taxes, totaling 7.25% to about 10.75% depending on location. For most customers in major metros, this translates to an 8-10% price increase on software purchases. This affects both buyers facing higher costs and vendors who must now handle tax collection and remittance, creating new operational challenges for many B2B companies.
3What's Taxable
The law taxes all prewritten software - defined as anything created for general or repeated sale, including most B2B products. Even custom solutions that evolve into standard products become taxable. Exemptions include truly custom software for single clients, IaaS/PaaS infrastructure, and human-delivered services. Digital media like books, music, and games remain exempt, maintaining their previous tax treatment.
4Sourcing Rules
Tax applies based on the purchaser's known California address, determined through a hierarchy: billing address first, then shipping/delivery, payment instrument, and finally mailing address. For usage, tax applies where the software is accessed. There's a presumption of California use for any software bought outside but used within the state within 90 days, closing potential loopholes.
5Nexus Thresholds
SB 122 doesn't create new nexus thresholds but makes software sales count toward existing ones. Companies need to register if they have physical presence in California or $500,000 in California sales. Many B2B companies that previously didn't deal with the California Department of Tax and Fee Administration (CDTFA) will now need to become registrants and comply with new reporting requirements.
6$5 Million Exception
A unique provision relieves vendors of collection duties when sales to a single purchaser exceed $5 million annually. In these cases, the purchaser must self-assess and remit use tax directly. CDTFA clarified this applies vendor-by-vendor, measured over 12 months, with the shift occurring on the transaction that crosses the $5M threshold.
7Buyer Impact
For companies spending $2M annually on software, this adds $160-200K in new, non-recoverable costs. The tax stacks with vendor price increases - a 7% vendor increase plus 9% tax creates a 16-17% total price hike. Unlike VAT, there's no input credit mechanism, meaning the tax directly reduces gross margins without offset.
8Bundling Challenges
Tax treatment depends on how services are bundled. Single-line-item bundles are fully taxable, while separately stated services may only have the software portion taxed. CDTFA applies a 'true object' test to determine the primary purpose of mixed contracts. Businesses should review vendor invoicing plans now, as structure determines tax liability.
9Compliance Burden
Companies crossing the $5M threshold with a vendor must establish use tax self-assessment processes. This includes obtaining a direct payment permit, issuing exemption certificates, and reporting local use tax by jurisdiction. Many finance teams lack these capabilities, creating implementation challenges before the January 2027 deadline.
10Location Strategies
Unlike some states, California currently lacks a multiple points of use mechanism for allocation across states. CDTFA is considering options modeled after Massachusetts, potentially using user or device location data. Businesses should clean their location data now to prepare for future allocation methods that may emerge through regulations.
11Strategic Implications
The SaaS tax significantly impacts California's tech economy, affecting both software providers and enterprise buyers. Vendors must update systems for tax calculation and compliance, while buyers face increased costs and administrative burdens. Early preparation is crucial, as the law's complexity creates multiple points of potential exposure for unwary businesses.
Original article: SaaStr — California's New SaaS Tax: What Businesses Need to Know