Sales tax calculator for freelancers selling products
Sales tax is a pass-through — here is exactly what to remit and what to keep.
If you sell products, templates, courses or merch alongside your services, you have stepped into sales tax — a pass-through you collect from the customer and send to the state.
This calculator works out the tax you owe to remit, what to charge the customer, and how marketplace-facilitator rules (Etsy, Amazon and similar) take the job off your hands.
Why freelancers suddenly owe sales tax
A writer or developer rarely thinks about sales tax, because services are largely exempt. But the moment you sell a product — prints, templates, physical merch, a course, a licensed plugin — you step into a different regime. You are no longer billing for time; you are making a retail sale, and most US states treat that as taxable.
The confusion starts because sales tax is a pass-through. You charge your customer an extra percentage, hold it briefly, and send it to the state. It is never your money, but you are the one legally responsible for collecting it correctly and remitting it on time. Get the registration or the rate wrong and the liability is yours, not the customer's.
The rate is not one number
People say "the sales tax is 7%" as if it were set nationally. It is not. The US has no federal sales tax, and the rate a customer pays is usually a combined figure: a state rate plus a county rate plus possibly a city or special-district rate, all stacked. California's base state rate is 7.25% but local add-ons push many areas above 10%. A sale shipped to a different jurisdiction can carry a different combined rate.
This is why the calculator asks for the combined rate rather than guessing a state figure. If you sell to customers in more than one location, you need the rate for each destination — and for remote sales, that destination, not your own address, usually sets the rate.
Nexus: the threshold that triggers the obligation
You do not owe sales tax simply because you made a sale. You owe it once you have nexus in a state — a sufficient connection that obliges you to register and collect. Nexus used to require a physical presence, but after the 2018 Supreme Court decision in South Dakota v. Wayfair, states can impose it on economic grounds: sell more than a dollar threshold (commonly $100,000 in sales or 200 transactions) into a state in a year, and you have nexus there even if you have never set foot in it.
For a freelancer shipping a few hundred dollars of merch to one state, this may never trigger. For someone running a steady Etsy store with nationwide reach, it can trigger in several states at once — each requiring its own registration, its own filing calendar, and its own login.
Marketplace facilitators changed the game
The single biggest relief for small sellers is the rise of marketplace-facilitator laws. In every state with a sales tax, platforms like Etsy, Amazon, eBay and others are now responsible for collecting and remitting the tax on sales they facilitate. If you sell only through such a platform, you typically have nothing to collect or file on those sales — the calculator's "Marketplace collects" option reflects that.
The catch is the word "only". The moment you also sell on your own website, at a market stall, or through invoicing directly, those non-marketplace sales are back on you. Many freelancers fall into a hybrid: marketplace sales handled automatically, direct sales handled manually. Keep the two streams separate so you know which obligations are yours.
What to do with the number
The figure this calculator produces is the amount you must eventually send to the state. The practical discipline is to separate it the day the sale happens. Ring-fence the tax portion in its own account, register for a sales-tax permit before you collect anything, and note each state's filing frequency — some want monthly filings, others quarterly or annually, and missing a zero-return deadline can still draw a penalty.
None of this touches your income tax. Sales tax is a separate system layered on top; you still report the underlying revenue as business income. Treat the two as unrelated obligations with unrelated calendars.
Estimates only. Sales-tax rules, rates and nexus thresholds vary by state and change frequently. This calculator applies the combined rate you enter; it does not know each jurisdiction's specifics. Confirm current rules with your state's Department of Revenue and, for anything beyond straightforward retail sales, a tax professional — see the disclaimer.
Frequently asked questions
Do freelancers have to charge sales tax?
Only on taxable sales, which usually means products rather than services. Most professional services (writing, design, consulting) are exempt from sales tax in most states, but physical goods, digital products, courses and licensed software often are not. If you sell anything other than your time, check whether that item is taxable in the states where you have nexus.
What is nexus and when do I trigger it?
Nexus is the connection that obliges you to register and collect sales tax in a state. It can be physical (an office, warehouse or employee there) or economic — commonly over $100,000 in sales or 200 transactions into a state in a year, though thresholds vary. After Wayfair (2018), economic nexus means you can owe tax in states you have never visited.
If I sell on Etsy or Amazon, do I still need to collect sales tax?
Generally no, for those marketplace sales. Marketplace-facilitator laws make the platform responsible for collecting and remitting the tax on sales it facilitates, in every state with a sales tax. But any sales you make off-platform — your own site, direct invoicing, in person — remain your responsibility to collect and file.
Is sales tax part of my revenue?
No. Sales tax is collected from the customer and passed through to the state; it is never your income. You report the underlying sale as business revenue for income-tax purposes, but the tax portion belongs to the government and must be remitted separately. Keeping it in a separate account avoids accidentally spending money that is not yours.
Which rate do I use if I ship to customers in different states?
For remote sales, the rate is usually set by the destination address, not your own location, and it is the combined state plus local rate for that specific address. If you sell only locally, your own combined rate applies. Many sellers use their platform or a tax-compliance service to look up the correct destination rate per order.
Do I need to register before I collect sales tax?
Yes. You generally must hold a sales-tax permit (registration) in a state before you collect tax from customers there. Collecting without a permit, or failing to remit what you collected, creates liability that follows the business. Register once you have or expect nexus, then file according to that state’s assigned frequency.