Sales Tax on Invoices: A US Freelancer's Guide
"Do I add sales tax to my invoice?" is one of the most common — and most confusing — questions US freelancers ask. The honest answer is the frustrating one: it depends on your state, what you sold, and where your client is. Unlike VAT in the UK or GST in Australia, the US has no national sales tax — there are 45+ separate state systems plus thousands of local jurisdictions, each with its own rules. This guide explains the framework so you know what questions to ask, not to replace your state's guidance or an accountant's advice.
The key concept: sales tax usually targets goods, not services
Here's the starting point that simplifies most freelancers' lives: in the majority of states, pure services are not subject to sales tax. If you're a designer, writer, developer, or consultant selling your time and expertise, most states don't require you to collect sales tax at all.
But "most" isn't "all," and the exceptions are where people get tripped up:
- Some states tax specific services. Examples include data processing in Texas, certain professional services in Hawaii and New Mexico (which tax nearly all services via gross receipts taxes), and various digital services across states.
- Digital products are increasingly taxed. Stock photos, templates, e-books, software downloads, SaaS — many states now treat these as taxable, though the rules vary wildly.
- Mixed transactions get complicated. A website project (service) that includes a premium plugin license (product)? Some states tax the product portion. Bundling rules differ by state.
The practical rule: if you sell pure services, you're probably fine in most states — but verify your specific state's position with its Department of Revenue rather than assuming.
Nexus: why your client's location matters
"Nexus" is the tax term for having enough connection to a state that its tax rules apply to you. Traditionally this meant physical presence — an office, an employee, inventory. Since the 2018 South Dakota v. Wayfair Supreme Court decision, states can also establish economic nexus based on sales volume into the state (commonly $100,000 in sales or 200 transactions per year, though thresholds vary).
For freelancers, nexus usually works like this:
- Your home state is where you almost certainly have nexus. Learn its rules first.
- Client states generally don't create nexus for pure remote services — you're performing the work where you are. But if you travel to a client site regularly, or sell taxable digital products into many states, the analysis changes.
- Economic nexus thresholds are aimed at sellers of goods, but if you sell taxable digital products, track your sales by state.
This is general background, not a nexus determination — if you have significant multi-state activity, that's squarely accountant territory.
Three common freelancer scenarios
Scenario 1: Designer in Colorado, clients everywhere, pure services. Colorado doesn't tax most services, and you're performing the work in Colorado. You almost certainly don't charge sales tax to anyone. Just confirm Colorado's current position on your specific services and move on.
Scenario 2: Developer in Texas selling a SaaS template pack. Texas taxes data processing and has broad rules around digital goods. You may well need to collect Texas sales tax from Texas buyers — and register first. The digital-product analysis is state-specific and worth getting right before you sell.
Scenario 3: Photographer in New York who shoots weddings in New Jersey and Connecticut. Regular physical work in other states is the classic way freelancers create nexus without realising it. Each state's rules then apply to the work performed there. Multi-state physical presence is a strong signal to get professional advice rather than DIY-ing it.
How to calculate sales tax when it does apply
When you do need to charge sales tax, the calculation itself is simple:
Tax = taxable amount × combined tax rate
The combined rate is state + county + city + any special district taxes for the relevant jurisdiction. Rates range from 0% (the five states with no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, Oregon — though Alaska allows local taxes) to over 10% in parts of Tennessee, Louisiana, and elsewhere.
Example: a $2,000 invoice for taxable services in an area with a 7.25% combined rate → $2,000 × 0.0725 = $145.00 tax, $2,145.00 total.
Two things to get right:
- Use the correct jurisdiction's rate. It's usually based on where the work is performed or delivered, depending on the state's sourcing rules — not necessarily where your client sits. State DOR websites have rate lookup tools.
- Only tax the taxable portion. If part of the invoice is taxable (products) and part isn't (services), separate the line items and apply tax only to the taxable lines. Don't blanket-tax the whole invoice.
What to show on the invoice
When you charge sales tax, the invoice must make it transparent:
- Separate line items for taxable vs non-taxable work (don't bury it).
- The tax rate you applied (e.g., "Sales tax (7.25%)").
- The tax amount as its own line, then the grand total.
- Your seller's permit / tax ID if your state requires one for collection — most states that tax your sales require you to register first. Collecting tax without registering (or registering without collecting) can both cause problems.
Never invent a "tax" line because it looks professional. If you're not registered and not required to collect, your invoice shows no tax at all — adding one anyway is misrepresentation and, in some states, an offence.
Registration, filing, and remittance
Charging sales tax is only step one — you're collecting it on the state's behalf, and you must hand it over:
- Register with the state's Department of Revenue before you start collecting (most states require a seller's permit or tax registration).
- File returns on the schedule the state assigns (monthly, quarterly, or annually, usually based on volume).
- Remit the collected tax by the deadline. This money was never yours — keep it in a separate mental (or actual) bucket from day one.
Miss these obligations and the penalties and interest fall on you, not your client — even if the client would happily have paid the tax.
Record-keeping that saves you
Keep for every invoice: the invoice itself, which state's rules you applied and why, the rate used and its source, and proof of registration and filings. If a state ever questions you, "I checked the DOR guidance on [date] and kept the printout" is a dramatically better position than "I guessed." Keep records for at least as long as your state's audit window (commonly 3–4 years).
Frequently asked questions
Do freelancers have to charge sales tax?
Usually not on pure services — most states don't tax services. But some states tax specific services or digital products, so check your state's Department of Revenue guidance for what you actually sell. When in doubt, ask an accountant in your state.
What happens if I should have charged sales tax but didn't?
You can generally be held liable for the uncollected tax plus penalties and interest — the state doesn't accept "my client would have paid it" as a defence. If you discover past mistakes, many states have voluntary disclosure programs that reduce penalties. Talk to an accountant promptly.
Do I charge sales tax based on my location or my client's?
It depends on the state's sourcing rules and what you sold. For services, it's typically where the work is performed (your location). For goods and digital products, many states use destination sourcing (the client's location). Check the specific state's rules.
Which US states have no sales tax?
Alaska, Delaware, Montana, New Hampshire, and Oregon have no statewide sales tax — though Alaska permits local sales taxes, so "no statewide tax" doesn't always mean zero tax everywhere in the state.
Can I just add a tax line to look professional?
No — never. Only charge sales tax if you're registered and required to collect it in the relevant jurisdiction. An invented tax line is misrepresentation, keeps money that isn't yours, and can create real legal trouble.