Have a US platform, distributor or client asking about California tax? Caira by Unwildered can help organise your documents, highlight missing information and assist with a clearer message for your accountant or US contact.
California Sales Tax For Foreign Sellers
California is too large to ignore and too easy to misunderstand. A foreign seller may begin with Amazon, Shopify, TikTok Shop, a trade show in Los Angeles or inventory held by a 3PL near the ports. Those routes can create different sales-tax questions.
This guide is written for foreign founders, online sellers, SaaS teams, agencies, product brands and export managers. This guide does not replace a state tax adviser. It is meant to help you identify which information to collect before consulting a professional adviser.
Why This State Deserves Its Own Guide
California's official guidance separates out-of-state retailers, marketplace facilitators and internet sales. For a non-US seller, the key question is not simply whether customers are in California. It is whether sales are direct or marketplace sales, whether tangible goods are involved, whether inventory sits in the state and whether the product or delivery route is exempt.
State tax questions can arise from common business activities, such as selling through marketplaces, attending trade shows, holding inventory in the US, signing enterprise clients or using a 3PL. Each state may treat these situations differently, so it is important to review the specific facts for that state.
The Five Checks
Situation | What to check |
|---|---|
Amazon or marketplace only | Check whether the marketplace is collecting California tax and whether you have separate direct sales. |
Own Shopify store | Track California revenue, product type, delivery address and exemption evidence. |
Inventory in California | Consider the warehouse or 3PL facts as a potential risk distinct from pure remote selling. |
SaaS or digital delivery | Physical-product assumptions may not apply to software or digital delivery. |
Trade show or pop-up | Review temporary selling, permits and local requirements before the event. |
What Caira Can Help Prepare
Caira by Unwildered uses AI to help businesses organise documents for easier review. For this topic, Caira can help you compare marketplace reports with direct sales, summarise customer-location data, extract key information from invoices or 3PL records, and prepare questions for your accountant, bookkeeper, customs broker or US client.
Caira should not be used as a substitute for regulated tax advice. Caira's value is in helping you prepare: more complete documentation, clearer questions and a better record of what has already been reviewed.
Documents To Put In One Folder
California sales by channel and delivery address;
Marketplace collection reports;
3PL or FBA inventory records;
Product taxability notes and exemption certificates;
Event booth, pop-up or trade-show paperwork;
Common Mistakes
Assuming Amazon collection covers all California sales;
Ignoring California inventory because the company is incorporated abroad;
Combining SaaS, downloaded software and physical goods without considering their differences;
Waiting until a payment processor or buyer asks for tax registration proof;
These mistakes are easy to make because state sales tax does not feel like a product, shipping or contract issue at first. It becomes one when a marketplace report, buyer request, event receipt, warehouse record or customer address proves that the state has to be considered separately.
Short FAQ
If a marketplace collects tax, am I done?
Not always. Marketplace collection may help with marketplace sales, but you still need to check direct website sales, inventory, event sales, exempt sales and other taxes that may not be handled by the platform.
Does this apply if my company is outside the US?
In many cases, yes. State rules often focus on sales, delivery, inventory, marketplace activity or receipts, rather than only the place of incorporation.
Should I register in every state just in case?
In most situations, no. Registering in states where you do not have an obligation can create unnecessary filing duties. A better first step is to collect sales, channel, customer-location and inventory information, then consult a qualified adviser about which states require action.
What is a practical first step?
Separate marketplace sales from direct sales, identify where inventory sits, export sales by customer state, and keep proof of who collected tax. Then ask focused questions instead of sending a vague summary.
Sources Checked
California CDTFA Tax Guide for Out-of-State Retailers.
California CDTFA Marketplace Facilitator Act guide.
California CDTFA Publication 109 Internet Sales.
California CDTFA Regulation 1502.
This article is general information. It is not legal, tax, customs, financial or regulatory advice.
