California Software Sales Tax 2027, explained in plain English
On January 1, 2027, California's three-decade-long exemption on software-as-a-service ends. If you sell software or SaaS to California customers, here's what actually changes — and the five steps that leave you ready — in language you don't need a tax lawyer to read.
What actually changes on 1/1/2027
For most of this century, California considered most software not subject to sales tax — the famous exemption that let SaaS sellers skip collecting. SB 122 repeals that for the majority of software and SaaS. Starting January 1, 2027, the sale of software (including accessed-via-the-cloud SaaS) to California customers generally becomes taxable, sold how it's sourced by the seller.
Three things do not change regime: digital books and many digital publications, certain excluded categories, and services that aren't software. Custom, installed, and hardware-adjacent arrangements have their own rules.
Who's affected — and the $5M carve-out
Not everyone. California built a $5 million revenue carve-out that protects smaller sellers. If you're under the threshold for the qualifying period, you likely stay exempt — no registration, no collection. Larger sellers phase in.
That carve-out is the single most important line for independent founders and small SaaS. It's also the line founders most often get wrong, because it depends on which revenue window and entity the rules count.
Nexus: do you have to charge California at all?
California nexus comes from physical (employees, office, inventory) or economic presence — roughly $500,000 in combined annual sales in the state. No nexus, generally no obligation. The free tool walks your exact numbers.
The five steps to get ready
- Register with the CDTFA — a seller's permit before the first taxable sale.
- Audit your billing-address data — where you decide taxability by destination sometimes. This is your biggest control and most common miss.
- Update invoice & price-notice wording — line-item tax, and notice before price changes.
- Set your 2027 remittance calendar — rates, sourcing, and record-keeping cadence.
- Keep your decision record — write down why you classified your product the way you did.
Done-for-you steps for all five: registration walkthrough, billing-address audit, invoice copy, 2027 calendar, and readiness checklist.
Frequently asked questions
Is my SaaS taxable in California in 2027?
Mostly yes from 1/1/2027, subject to the $5M carve-out and your nexus. Run the free tool for your exact answer.
Does the $5M carve-out apply to me?
If your software revenue is under the qualifying threshold, you likely stay exempt; it phases in for larger sellers.
What do I need to do before January 1, 2027?
Register with the CDTFA, audit billing addresses, fix invoice wording, set your remittance calendar, and keep your decision record. The Launchpack walks through all five.
Does SB 122 apply to digital books or AI-generated content?
Digital books and many digital publications sit outside the new base. Services and hardware differ. Confirm your exact classification.
Is this legal or tax advice?
No — informational only. Confirm with the CDTFA or a licensed advisor for your specific situation.
Disclaimer. This page is informational only and is not legal, tax, or accounting advice. California's rules under SB 122, the CDTFA regulations, and rate tables are evolving; verify everything against official sources before acting. The author is a software seller preparing, not an advisor.