How to Send Your First Invoice
Sending your first invoice feels more complicated than it is. You've completed the work, you know what to charge — now you just need to get the document from you to your client in a way that gets you paid. This guide walks through every step, from what to include on the invoice to what to write in the email to what to do if it goes unpaid.
What to Include on the Invoice
Every invoice you send needs these fields:
Your information:
- Your full name or business name
- Address
- Email address
- Phone number (optional but professional)
Client information:
- Client's legal business name or full name
- Their billing address
- Their email (the accounts payable contact, not just the project manager)
Invoice details:
- Unique invoice number (e.g., INV-2026-001 — your first invoice)
- Invoice date (today's date)
- Due date (calculated from your payment terms)
Services:
- Clear description of what you delivered
- Dates the work was performed
- Quantity and rate (for hourly work: hours × rate; for flat-rate: project name and total)
- Line item total per service
Totals:
- Subtotal
- Tax (if applicable — see below)
- Total due
Payment terms and methods:
- Your payment terms spelled out: "Payment due May 1, 2026" (not just "Net 14")
- How to pay: bank transfer details, PayPal address, or payment link
That's a complete invoice. Nothing more is required for most freelance work in the US.
About Sales Tax
For most US freelancers providing services, you do not need to collect sales tax. Service-based work (writing, design, consulting, photography, coaching) is generally exempt from sales tax in most states.
Exceptions apply in certain states (Texas, New York, and a handful of others tax some services) and if you're selling digital products or physical goods. When in doubt, check your state's rules or consult a tax professional. For a detailed breakdown, see our guide on whether freelancers need to charge sales tax.
Setting Your Payment Terms
Standard freelance payment terms:
- Net 7 — due 7 days from invoice date. Best for small projects, new clients, or any situation where you want fast payment.
- Net 14 — due 14 days from invoice date. A good default for most freelance work.
- Net 30 — due 30 days from invoice date. Common in corporate B2B but unnecessarily long for most freelance relationships.
For your first invoice, Net 14 is a reasonable default. Shorter terms reduce the time you wait for payment and signal that billing is professional and structured from the start.
Write the due date explicitly on the invoice: "Payment due: May 2, 2026." This is unambiguous — the client knows exactly when payment is expected and cannot claim confusion about the timeline.
How to Number Your Invoices
Every invoice needs a unique number. For your first invoice, a simple format works fine:
- INV-2026-001 — year + sequential number
- INV-001 — simple sequential
- 2026-001 — year-first
Pick a format and use it consistently. Your invoicing app will typically auto-number invoices for you — let it, and don't override the sequence.
The number matters for three reasons: it gives both you and the client a way to reference a specific invoice in correspondence ("Re: INV-2026-001"), it keeps your records organized, and gaps in numbering can be questioned during an IRS audit.
Writing the Invoice Email
Send your invoice as a PDF attachment with a brief, professional email. Don't paste the invoice content into the email body — attach it as a file so the client can save, forward, and reference it easily.
Subject line: Invoice INV-2026-001 — [Your Name/Business] — Due [Date]
Email body:
Hi [Client Name],
Thank you for the opportunity to work on [project name]. Please find attached Invoice INV-2026-001 for [brief description of work], totaling $[amount], due [date].
Payment can be made by [payment method — e.g., bank transfer to the details below / the link in the invoice].
Please let me know if you have any questions. I look forward to working together again.
[Your name]
Keep it short. The invoice has all the detail — the email just delivers it and confirms the key numbers.
Sending From a Professional Email Address
Send invoices from a professional email address — either your own domain (hello@yourbusiness.com) or at minimum a dedicated Gmail address (yourname.freelance@gmail.com). Invoices sent from obviously personal addresses (xoxo_designer@hotmail.com) are more likely to be treated casually and deprioritized by accounts payable departments.
If you don't have a business domain yet, a clean Gmail with your name and business type is fine for now.
What to Do After Sending
Once the invoice is sent:
- File a copy — save the PDF to your Invoices/2026/Sent folder. The invoice is now a business record.
- Note the due date — add it to your calendar or check it in your invoicing app's dashboard.
- Set up a reminder — if your invoicing app supports automated reminders, configure one to send 3 days before the due date and again if it goes overdue.
For your first invoice, you'll probably monitor it manually. As you build a client roster, automated reminders handle this without effort.
Following Up on Late Payment
If the due date passes without payment, follow up promptly — within 1–2 days of the due date passing, not after two weeks. Most late payments are oversights, not refusals, and a timely reminder resolves them quickly.
First follow-up (1–2 days overdue):
Hi [Client Name],
I wanted to follow up on Invoice INV-2026-001 for $[amount], which was due on [date]. If payment has already been sent, please disregard this message.
If you have any questions or need a different payment method, I'm happy to help.
[Your name]
If no response after 7 days:
Hi [Client Name],
Invoice INV-2026-001 is now 7 days past due. I'd appreciate payment at your earliest convenience. Please let me know if there's an issue I should be aware of.
[Your name]
Keep your tone professional and factual. Avoid apologetic language — you've completed the work and deserve to be paid. For a detailed follow-up strategy, see our guide on how to follow up on unpaid invoices.
Common First-Invoice Mistakes
Sending to the wrong person. The project manager who hired you is often not the person who processes payments. Ask at the start of the project: "Who should I send invoices to?" Getting the billing contact right on the first invoice prevents a week of delays.
Vague service descriptions. "Design work — $1,500" is too vague. "Brand identity package: logo (3 concepts, 2 revision rounds), brand guidelines document, final files delivered April 15 — $1,500" is clear and leaves no room for dispute.
No payment method. List exactly how to pay. A client who wants to pay but can't figure out how will delay.
"Due on receipt" instead of a specific date. Clients interpret "due on receipt" differently — some treat it as immediately, some as whenever they process it. A specific date is unambiguous.
Waiting to send. The longer you wait after delivering work, the longer payment takes and the more awkward the dynamic becomes. Send your invoice the same day you deliver the work.
Invoices Customers handles invoice numbering, client data, PDF generation, and sending from your iPhone — so your first invoice can be professional and complete in under 5 minutes.
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