Home › Guides › US sales tax on invoices

US Sales Tax on Invoices Explained

Updated October 2026 · 8-minute read

If you invoice clients in the United States, sales tax is the part most likely to trip you up — because unlike VAT, there is no single national system. There are 45 states (plus DC) with a statewide sales tax, thousands of local jurisdictions with their own add-on rates, and rules that differ not just by state but by what you're selling. Here's how to think about it.

How US sales tax differs from VAT

The single biggest conceptual difference: US sales tax is charged only on the final sale to the end customer, not at every stage of production. There's no reclaim mechanism like VAT input credits. And critically for invoicing, the seller is generally responsible for collecting the correct tax and remitting it to the state — getting it wrong means you owe the difference out of pocket.

• No federal sales tax. Everything happens at the state (and county/city) level.
• Rates are combined. A New York City invoice might show 8.875% — that's 4% state + 4.5% city + 0.375% transit surcharge. Always display the combined rate you actually charged.
• Five states have no statewide sales tax at all: Alaska, Delaware, Montana, New Hampshire, and Oregon (Alaska allows local sales taxes, so check the locality).

Nexus: why you might owe tax in a state you've never visited

You only collect sales tax in states where you have nexus — a legal connection sufficient to create a tax obligation. Two kinds matter:

• Physical nexus: an office, employee, warehouse, or even regular travel into the state. Straightforward.
• Economic nexus: since the 2018 South Dakota v. Wayfair Supreme Court decision, selling into a state can create nexus without any physical presence. Most states set thresholds around $100,000 in sales or 200 transactions per year into the state — cross them and you must register and collect.

For a freelancer invoicing a handful of out-of-state clients, economic nexus rarely triggers — but if you're selling products or digital goods nationally, monitor your sales by state. Crossing a threshold unnoticed is one of the most expensive mistakes small businesses make.

Do you charge sales tax on services?

This is where most freelancers get confused, because the answer is "it depends on the state":

• Many states exempt most professional services. Consulting, design, marketing, and similar services are not taxed in states like California, Colorado, and Georgia (rules change — verify).
• Some states tax specific services broadly. Texas taxes many services; New York taxes some; a growing number of states have expanded service taxation in recent years.
• Products are a different story. If you sell physical goods (prints, merchandise, equipment), sales tax almost always applies where you have nexus.
• Bundled transactions get tricky. Sell a website (service) plus a printed brand book (product) on one invoice? Some states tax the entire bundle. When in doubt, separate products and services onto clearly labeled lines.

How to display sales tax on an invoice

Same golden rule as VAT: show it as a separate labeled line, never baked into your prices. A proper US invoice with sales tax shows:

• Subtotal of taxable items.
• The tax labeled by jurisdiction and rate: "NYC Sales Tax 8.875%" or "CA State Sales Tax 7.25%."
• The tax amount.
• The grand total.

Note how only the goods line attracted tax. If your entire invoice is services exempt in your state, simply omit the tax line — don't write "tax exempt" unless that's a formal status.

What if your client is in another state?

For services, you generally apply the rules of your state (where the service is performed). For shipped goods, it's usually the destination state — and if you have nexus there, you collect that state's (and locality's) rate. This is why e-commerce sellers use automated tax software: tracking thousands of local rates manually is genuinely impractical.

Practical guidance for service freelancers: if you and the work are in one state, invoice under that state's rules and note the client's location in the billing address. Cross-state service taxation disputes are rare for pure services — but keep an eye on states expanding their service tax base.

Resale certificates and exempt clients

Some clients — nonprofits, government agencies, resellers — are exempt from sales tax. They should provide you a valid exemption or resale certificate before you invoice. Your job: keep the certificate on file and note "Tax-exempt sale — certificate #12345 on file" on the invoice. Never take a client's word for exemption without documentation; if audited, the certificate is your proof.

Common US sales tax invoicing mistakes

• Assuming services are never taxed. True in many states, false in some — and the list changes.
• Using one flat rate for all clients. Rates vary by the client's locality for shipped goods. A single "8% sales tax" line for everyone is wrong for most of them.
• Ignoring economic nexus. Selling $150,000 of products into a state likely means registering there, even with no office.
• Burying tax in prices. Always a separate labeled line — it builds trust and survives audits.
• No records. Keep every invoice, exemption certificate, and filing for at least 3–4 years (states vary; longer is safer). See our record-keeping guide.

US sales tax FAQ

I'm a freelancer selling only services. Do I need to worry about sales tax?
Probably not much — but verify your state's current rules once a year, because states keep expanding which services are taxable. Ten minutes of checking beats a surprise assessment.

Do I charge sales tax to out-of-state clients?
For services, generally no — you follow your own state's rules. For shipped goods, generally yes at the destination rate if you have nexus in the destination state.

What rate do I use — mine or the client's?
For services performed where you are: yours. For goods shipped to the client: the destination's (state + local combined). When in doubt, your state's department of revenue has lookup tools.

Should I register for a sales tax permit?
If you sell taxable goods or services in a state where you have nexus, yes — you generally need a seller's permit before collecting tax. Collecting without a permit, or failing to remit what you collect, creates real liability.

Key takeaways

• US sales tax is state-level: no federal rate, thousands of local variations.
• Pure services are exempt in most states — but verify yours annually.
• Watch economic nexus thresholds (~$100K or 200 transactions) if you sell across state lines.
• Always show sales tax as a separate labeled line with the jurisdiction and rate.
• Keep exemption certificates on file; keep everything for 3–4+ years.