Self-employed invoicing basics

If you work for yourself, invoices are how you get paid and how you prove income later. You don’t need software on day one. You need the right name on the invoice, a number that never repeats, and copies you can find again.

The fields every invoice needs, from the invoice number to the due date, are covered one by one in how to write an invoice. This guide is about the parts that are different when the business is just you.

Your legal name or a trading name

A lot of people start out under a name that isn’t their own, like “Ruiz Copy” instead of “Ana Ruiz”. That’s fine, but the invoice should make it clear who the client is paying. The simplest way is to show both in From: “Ana Ruiz, trading as Ruiz Copy”.

• In the US, the SBA says most states require you to register a trade name if you use one, often called a DBA (“doing business as”), with the state, county, or city. The rules depend on where you are.
• In the UK, GOV.UK says a sole trader’s invoice must include your name and any business name you use, plus an address where legal documents can reach you if you use a business name.
• If your bank account is in your own name, say so in the notes. A client paying “Ruiz Copy” into an account called “Ana Ruiz” may stop and ask.

A worked first invoice

Ana writes website copy. Her first invoice goes to a local dental practice on Thu Oct 1, 2026:

• From: Ana Ruiz, trading as Ruiz Copy, with her address and email
• Invoice number: 1001
• Website copy, 5 pages: 5 × $120.00 = $600.00
• Kickoff call and one round of revisions, Sep 24 to 30: 1.5 hr × $60.00 = $90.00

Subtotal $600.00 + $90.00 = $690.00. There is no tax line, so the total is $690.00. Net 14 from Oct 1 makes it due Thu Oct 15, 2026, and that date goes on the invoice, not just “Net 14”. The notes say how to pay: “Bank transfer to Ana Ruiz, reference 1001.” Invoice date vs due date shows the day counting, and line item descriptions has more on specific, dated lines like these.

Next time she starts at 1002, even if 1001 gets corrected. A fixed invoice gets a new number that says what it replaces. See invoice numbering and revising or voiding an invoice.

When a tax ID belongs on the invoice

• Don’t put your Social Security number on an invoice. If a US client needs your taxpayer ID, they’ll usually ask for it on their own form, such as a W-9.
• If you’re registered for VAT, GST, or sales tax, the rules usually say which registration details must appear on the invoice. GOV.UK, for example, says VAT invoices carry more information than other invoices. Check the rules where you’re registered.
• Don’t add a tax line unless you know you’re meant to charge tax. Ana’s example has none.

This tool has no separate tax ID field. If a number does belong on the invoice, put it under your address in From or in the notes. None of this is tax advice. An accountant where you file can tell you what applies to you.

The records to keep

• The PDF you sent, named with the invoice number first.
• The email you sent it with.
• The date you were paid, how, and the amount.
• The message or proposal that agreed the price.
• Receipts for any expenses you billed back.

How long to keep them depends on where you file. The IRS says to keep records that support income on your tax return until the period of limitations for that return runs out, which is generally 3 years and longer in some cases. For the self-employed in the UK, GOV.UK says at least 5 years after the 31 January submission deadline for that tax year. Other countries set their own rules.

A folder per year, then per client, is enough. So is a simple tracker with the number, client, issue date, due date, amount, and paid date. This tool keeps no history on a server, so that folder is your record.

Habits that help when it’s just you

• Invoice the day the job ends. Waiting until month end for every small job means waiting longer to be paid.
• Keep business money apart when you can. One account for client payments makes the records above much easier.
• Send it to whoever pays. The person who approved the work is not always the one who pays the bills.
• Quote before you invoice if the price isn’t agreed yet. Estimate vs quote vs invoice explains the difference.
• Pick terms you can live with. Net 14 or Net 30 is normal for early clients. Payment terms explained covers deposits and late fees, and choosing payment methods to list helps with the notes.
• Chase late payments short and early. Overdue invoice email wording has a simple sequence, and getting paid on time covers what to agree before the work starts.

What this tool will not do

FreeInvoicePDF builds the PDF in your browser. It does not chase clients, file your taxes, sync to a bank, or store your history in the cloud. Drafts stay on your device, and your From details, logo, and currency are kept in this browser so the next invoice starts filled in. That is intentional, and it means you still need your own records. Read about the site if you want the full scope.

When you are ready, use the invoice generator or a freelance starting point. Trades and session work can start from the contractor or photographer templates, and lessons from the tutoring invoice template. Labelled ads pay for hosting and upkeep. Free forever and ad-supported, with no account, no paywall, and no daily quota.