You finished the work. You're ready to send the invoice. Then you pause — do you need to charge sales tax? How much? And where exactly does it go on the invoice?
Sales tax on invoices trips up a lot of freelancers because the rules depend on what you sell, where you're based, and where your client is located. This guide walks through the basics: when you need to charge sales tax, how to calculate it, and how to display it clearly on your invoices so there's no confusion for your client or your accountant.
It depends on two things: what you're selling and where you're selling it.
Physical products are almost always taxable. If you sell handmade goods, printed materials, or any physical item, you'll need to collect sales tax in states where you have nexus (a business presence).
Services are where it gets complicated. Most states don't tax services — but some do. States like Hawaii, New Mexico, South Dakota, and West Virginia tax nearly all services. Others tax specific categories like digital services, consulting, or design work.
Digital products — software, digital downloads, SaaS subscriptions — are taxable in roughly half of U.S. states. The rules vary widely and are changing fast as states update their tax codes for the digital economy.
This article covers general principles. Tax rules vary by state and country, and they change. Always confirm your specific obligations with a tax professional or your state's department of revenue.
Once you know you need to charge tax, the math is straightforward:
Tax amount = Taxable subtotal × Tax rate
That's it. Multiply the subtotal of taxable items by the applicable tax rate, and add the result to the invoice total.
The key detail most freelancers miss: you apply the tax rate to the subtotal after any discounts but before adding other fees like shipping. If you give a client a 10% discount on a $2,500 project, the taxable amount is $2,250, not $2,500.
Sales tax rates in the U.S. are a combination of state, county, and sometimes city rates. The rate that applies depends on the destination — where the goods or services are delivered — in most states. A few states use origin-based sourcing, where the seller's location determines the rate.
Here's how to find yours:
Common state rates range from 0% (Oregon, Montana, New Hampshire, Delaware, Alaska have no state sales tax) to 7.25% (California, the highest state rate). But combined local rates can push the total above 10% in some cities.
On a single invoice, some line items might be taxable and others might not. Here's how to handle it:
When in doubt about whether a specific service is taxable in your state, check your state's tax authority website. Many publish detailed lists of taxable and exempt services. Guessing can mean under-collecting (you owe the difference) or over-collecting (your client overpays and you owe them a refund).
Tax should be a separate line between the subtotal and the total. Never bury it inside your line item prices — that creates confusion and can cause problems during audits.
Here's the correct structure:
Showing the tax rate in parentheses alongside the amount is a small detail that makes a big difference. Your client sees exactly what percentage was applied, which prevents "why is this higher than the quote?" emails.
Enter a tax percentage, and the math is done for you. Subtotal, tax, discount, and total — all calculated automatically.
Create Invoice →Some clients are exempt from sales tax. Government agencies, nonprofits, and resellers (buying goods to resell) often qualify for exemptions. If a client claims to be tax-exempt:
This is the question that causes the most confusion: do you charge sales tax when your client is in a different state?
The short answer: it depends on whether you have nexus in their state. Nexus means a significant enough business presence to trigger tax obligations. It can be created by:
Most freelancers don't hit economic nexus thresholds in other states — $100,000 in sales to a single state is a lot of freelance work. But if you do, you'll need to register, collect, and remit sales tax in that state.
If you don't have nexus in the client's state and your services aren't taxable in your own state, you generally don't need to charge sales tax on that invoice.
If you're invoicing a client in another country, U.S. sales tax typically doesn't apply — it's a domestic tax. However, be aware of your client's local tax obligations:
For a broader guide on handling international payments and currencies, see our article on how to invoice clients as a freelancer.
These come up constantly and they're all avoidable:
Good records make tax time straightforward. For every invoice that includes sales tax, keep track of:
Most states require you to keep these records for at least three to four years. An invoice generator that lets you track invoices by status — draft, sent, paid, overdue — makes this much simpler than digging through email attachments.
That's the whole process. The calculation itself takes seconds — the time investment is in knowing whether and how much to charge, which you figure out once per state and then reuse.
Enter a tax percentage on any invoice. Subtotal, tax, discount, and total update automatically.
Create Invoice →For a full breakdown of every field that belongs on your invoice — not just tax — see our guide on what to include on a freelance invoice.
Disclaimer: This article is for informational purposes only and does not constitute financial, tax, or legal advice. Tax rules vary by jurisdiction and change frequently. Consult a qualified tax professional for advice specific to your situation.