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How to invoice as a sole proprietor in the US

A plain-English guide to invoicing as a sole proprietor — what to include, when sales tax applies, and how to get paid without an accountant on speed dial.

Updated June 2026 · General guidance — not tax advice

Quick answer

Invoice under your own name — no state business registration is required just to be a sole proprietor. Include the date, description of services, total amount, and your payment details. Add a sales tax line only if you have nexus in the state and your work is taxable there.

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Do you need to charge sales tax?

There's no single national threshold the way a VAT or GST system has one. Whether you charge sales tax depends on nexus (a business connection to a state) and whether that state taxes your type of work at all.

SituationSales tax?Invoice type
Service-only, no nexusNoStandard invoice — no tax line
Nexus + taxable workYes — collect and remitInvoice with sales tax shown separately
UnsureCheck firstAsk your state Dept. of Revenue

Many service-based sole proprietors — consultants, designers, cleaners, and similar — never need to charge sales tax, because either their state doesn't tax pure services or they don't have nexus outside their home state. Contractors selling materials alongside labour are more likely to owe tax on at least the materials portion.

Important

Never collect sales tax before you're registered with your state — collecting tax without a permit is a compliance problem. If you're not required to charge tax, just omit any tax line from your invoice.

What goes on a sole proprietor invoice

No sales tax applies — standard invoice

Sales tax applies — add these

Sample sole proprietor invoice — no sales tax

Here's what a standard invoice looks like for a sole proprietor whose service work isn't taxable:

Invoice
INV-2026-0031
Sarah Whitfield sarah@whitfieldcleaning.com
(512) 555-0121
Invoice to
Mr & Mrs Patel
22 Beech Road
Austin, TX 78701
Date
June 10, 2026
Payment due
June 24, 2026
DescriptionTotal
House clean — 22 Beech Road (3 hrs)$165.00
Window cleaning — interior and exterior$75.00
Total Due$240.00
Payment details: Routing 111000025 · Acc 71005544 · Reference: INV-0031

Notice — no sales tax line and no seller's permit number. This is correct for a sole proprietor whose work isn't taxable in their state.

Do I need to register a business?

Generally, no. A sole proprietorship is the default legal structure the moment you start doing business under your own name — there's no state filing required just to invoice clients, unlike forming an LLC or corporation.

If you want to trade under a name other than your own legal name (e.g. "Whitfield Cleaning" instead of "Sarah Whitfield"), most states or counties require a DBA ("doing business as") filing, sometimes called a fictitious business name registration. Some cities and states also require a general business license regardless of your entity type — this varies a lot by location, so check your city and state requirements.

What tax ID do I use?

Most sole proprietors can simply use their Social Security Number for tax purposes. You can also apply for a free Employer Identification Number (EIN) from the IRS if you'd rather not share your SSN with clients, or once you plan to hire employees. Business income and expenses are generally reported on Schedule C of your personal Form 1040, and net earnings are also subject to self-employment tax.

When do I need to worry about sales tax?

Only once you have nexus in a taxing state and your work is taxable there. If that applies, you'll generally register for a seller's permit with that state's Department of Revenue before you start collecting tax — see our Sales Tax Invoice Guide for the full picture.

Sole proprietor invoicing, answered.

How do I invoice as a sole proprietor in the US?
Invoice under your own name or a registered DBA. Include the date, a description of what you did, the total amount, and your payment details. Add sales tax only if you have nexus in the state and your work is taxable there.
Do I need to charge sales tax as a sole proprietor?
Only if you have nexus in the state where the work happens and that state taxes your type of work. There's no single national threshold — it depends on your state's rules.
What goes on an invoice if sales tax doesn't apply?
Your name, invoice date, description of services, total amount in USD, and your payment details. No sales tax line, no seller's permit number needed.
Do I need to register a business to send invoices?
Generally no state entity registration is required to operate as a sole proprietor. If you trade under a name other than your own, most states or counties require a DBA filing. Some cities also require a general business license — check locally.
What tax ID do I use as a sole proprietor?
Most sole proprietors can use their Social Security Number, or apply for a free EIN from the IRS if they'd rather not share their SSN, or once they hire employees. Business income is generally reported on Schedule C of Form 1040.
How do I send an invoice as a sole proprietor?
Create a PDF invoice and email it to your client. TradieNotes generates a professional invoice from your job notes in 60 seconds for $2. No accounting software, no monthly fees, no signup required.
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Related guides

This guide is general information for US sole proprietors and is updated periodically. It is not legal or tax advice. For advice specific to your situation, speak to your accountant or check your state's Secretary of State and Department of Revenue websites.