Sales tax on US invoices, explained.

When to charge it, which states tax services, what nexus means, and how to keep clean records that won't ruin your year-end. Written for freelancers, sole proprietors, and small businesses sending invoices in the USA.

i.Sales tax in two paragraphs

Unlike VAT in Europe or GST in Australia, the US has no federal sales tax. Forty-five states and the District of Columbia impose their own sales tax, with rates from 2.9% (Colorado) to 7.25% (California) at the state level. On top of that, counties and cities add local rates that can push the combined total to 10%+ in some jurisdictions. Five states - Alaska, Delaware, Montana, New Hampshire, and Oregon - have no state sales tax at all (though Alaska allows local sales tax).

Whether you charge sales tax depends on three things: do you have nexus in the buyer's state, is what you're selling taxable in that state, and is the buyer exempt (resale, government, non-profit). Most freelance services don't trigger any of these, so most freelance invoices don't carry sales tax. But when they do, it matters.

ii.What "nexus" actually means

Nexus is the legal connection that obligates you to collect a state's sales tax. Two main flavours:

• Physical nexus. You live in the state, have an office there, employ someone there, store inventory there, or attend a trade show there. Your home state is your default nexus state.
• Economic nexus. Since the 2018 Supreme Court decision in South Dakota v. Wayfair, states can require you to collect sales tax based purely on economic activity - typically $100,000 in sales or 200 transactions in the state within a year. Thresholds vary by state.

For most one-person service businesses, only physical nexus applies. You collect sales tax on taxable sales to customers in your home state; you don't collect for out-of-state customers (because you have no nexus there).

iii.What's taxable - the service vs. goods distinction

The most important question for freelancers: is what I'm selling actually taxable? Default rules:

• Tangible personal property (TPP) - physical items - is taxable in every state that has sales tax, unless specifically exempted.
• Most professional services are not taxable in most states. Writing, design (digital), consulting, software development, photography (digital files), accounting, legal, marketing - all typically exempt in the majority of states.
• Some services are taxable in specific states. Hawaii, New Mexico, South Dakota, and West Virginia tax most services. Other states tax specific categories (data processing in Texas, telecommunications in many states, landscaping in some).
• Digital goods and SaaS are increasingly taxable in many states, with rules changing frequently.

The practical takeaway: if you're a freelance designer in California selling digital design files to California clients, you probably don't charge sales tax (digital services exempt in CA for most cases). But the same designer selling printed posters to those same clients would charge sales tax on the prints.

iv.State-by-state quick reference

Approximate state-level sales tax rates (counties and cities add more):

• No state sales tax: Alaska, Delaware, Montana, New Hampshire, Oregon
• Low (2.9–4%): Colorado (2.9%), Wyoming, Hawaii, Alabama, Georgia, Louisiana, New York
• Mid (5–6%): Most states - Florida, Texas, Illinois, Ohio, Michigan, Wisconsin, etc.
• High (6.5–7.25%): California (7.25%), Indiana, Tennessee, Mississippi, Rhode Island, Minnesota, Nevada, Washington, Kansas, New Jersey

Add 1–4% in most places for county/city. California, for example, ends up at 7.25% state + 0.25% to 2.5% county + 0% to 1.75% city - meaning effective rates from 7.25% to over 10% depending on exact address.

v.What an invoice with sales tax should show

If you do charge sales tax, the invoice should clearly itemise:

• The pre-tax subtotal
• The tax rate applied (e.g. "Sales tax 7.25%")
• The tax amount in dollars
• The total amount due (subtotal + tax)
• Your sales tax permit number (some states require this; most don't on the invoice but you should have it)

VioBusiness puts the sales tax on a separate line on every invoice you mark with a tax rate. Set the rate per invoice (because if you serve customers in multiple jurisdictions, the rate varies) - the math is automatic.

vi.How to handle multi-state customers

If your business grows and you start selling to customers in many states, three things change:

1. Watch economic nexus thresholds. Sales to a state exceeding $100,000 or 200 transactions in a year typically obligates you to register and collect that state's sales tax.
2. Register where you have nexus. Each state has a separate sales tax permit process. Some are free; some charge a small fee.
3. File returns separately per state. Frequency varies (monthly, quarterly, annual based on volume).

For most small service businesses, this is far away. Most freelancers and consultants never approach economic nexus thresholds because services aren't widely taxable. If you sell physical goods online, this becomes important faster - a service like TaxJar or Avalara helps automate compliance once you cross into multi-state territory.

vii.Common mistakes to avoid

• Charging sales tax when you don't need to. Easy to do if you're new and want to be safe. But over-collecting is itself a problem - you've now taken money you're not entitled to keep and not legally required to remit.
• Not charging when you should. If you have nexus and the sale is taxable, you owe the tax to the state whether you collected it or not. You'd then pay it out of pocket.
• Forgetting that local rates exist. "California sales tax is 7.25%" is the state portion. Actual sales in Los Angeles County are at 9.5%+.
• Mixing taxable and non-taxable items without itemisation. If you invoice a client for both a tangible product (taxable) and a service (not), only tax the taxable line.

viii.How VioBusiness handles it

VioBusiness is built so that sales tax is a simple, per-invoice decision rather than a complicated configuration. The workflow:

1. Build the invoice with your line items.
2. Set the tax rate appropriate for that customer/state.
3. VioBusiness adds the sales tax line to the invoice, shows the breakdown, and totals correctly.
4. The CSV export at year-end gives you a clean record of every invoice with the tax rate, tax amount, and total - everything your accountant needs for sales tax filings.

For deeper sales tax compliance (multi-state filings, automated rate lookup), VioBusiness exports clean data that pairs naturally with tools like TaxJar, Avalara, or your state's e-file portal.

Disclaimer: This guide is general information, not tax advice. Sales tax law varies by state and changes frequently. For specific situations, especially if you're approaching nexus thresholds or selling across multiple states, consult a tax professional.

ix.Get VioBusiness

The clean, offline-first invoice app for US small business. $19.99 one-time. No subscription. More on the USA page.