Your First Invoice as a Freelancer: What to Send, What to Say, and What to Do If They Don't Pay

Before you create the invoice, make sure you have a few things settled. First, your payment details: however you plan to receive money, you need those details in front of you. That might be your bank account and routing number, your PayPal email address, your Wise account details, or a payment link from Stripe. You'll put this on the invoice so the client knows exactly how to pay.

Second, an invoice number. This is simpler than it sounds. INV-001 is a perfectly fine first invoice number. You'll go to INV-002 next time. If you want to include the year, INV-2026-001 works well. The number just needs to be unique — it's how you'll reference this invoice in any follow-up, and how the client's accounts team will track it in their system.

Third, your payment terms: when do you want to be paid? Net 15 (15 days from the invoice date) is a solid default. Net 30 (30 days) is common but, honestly, it's longer than most freelancers need to wait. Whatever you choose, calculate the actual calendar date — that's what you'll write on the invoice. Use the free net terms calculator to get the exact due date for any term without doing the math yourself.

That's genuinely all you need. You don't need accounting software. A well-structured Google Doc or PDF is fine for a first invoice.

Here's everything your first invoice needs — no more, no less. If you're based in the UK, check HMRC invoice requirements for the legally required fields.

• Your name or business name, and how to reach you (email, phone if relevant).
• Client name and company — whoever needs to receive and approve the invoice.
• Invoice number — unique, sequential (INV-001).
• Invoice date — the date you're sending it.
• Due date — the actual calendar date, e.g., "Due: March 15, 2026". Not just "Net 15".
• What you did — a specific description of each deliverable. Not "design work." More like "Homepage and About page design — 3 rounds of revisions, final files delivered Feb 10."
• The total — make it the most prominent number on the page. Bold it. Put it in a box if you want. The client needs to see it immediately.
• Payment details — the complete information the client needs to pay you. Account number, routing number, payment link. Not just "bank transfer accepted."

If you're registered for VAT or GST, include your tax number and the applicable tax. If you're not registered and your country doesn't require it for your income level, leave tax off.

That's a complete, professional invoice. It doesn't need a logo. It doesn't need a company bio. It doesn't need decorative design. It needs the information above, presented clearly.

Send the invoice as a PDF attached to an email. PDF is universal — it looks the same on every device, can't be accidentally edited, and is easy for accounting teams to file. Export from Google Docs, Word, or whatever you used to create it.

The email itself should be short. Here's a template:

That's it. You don't need to apologise for sending an invoice. You don't need to over-explain. You've done the work; this is a normal part of the transaction.

Send it immediately when the work is done — or when the milestone is reached. Every day you delay invoicing is a day added to when you'll be paid. Some freelancers wait until "a good time" to send an invoice, worrying about bothering the client. The client expects it. Send it.

After sending, use the schedule planner to set a follow-up reminder for just after the due date. You should know exactly when to check back — not when you happen to remember.

“I need you to pay me” feels personal. “Invoice #INV-001 for $2,400 is due March 15th” is just a business fact. This isn't a minor distinction — it's the entire difference between an awkward money conversation and a normal business transaction. The discomfort comes from framing payment as a personal request when it's actually the agreed conclusion of a commercial exchange.

The discomfort usually comes from framing it as a personal request. "I need you to pay me" feels personal. "Invoice #INV-001 is due March 15" is transactional. Use professional, transactional language — not because you're being cold, but because it removes the personal awkwardness from both sides.

If you had a deposit conversation before the project started, this is easy: you already established the payment expectation. The invoice is just the follow-through. If you didn't have a clear payment discussion before starting work, this is slightly harder — but you're still entitled to be paid for the work. State your terms clearly, and be direct without being apologetic.

For future projects: discuss payment terms before starting. "My standard process is a 50% deposit to begin and the balance due on completion, with Net 15 terms." Having that conversation once at the start means you never have to have an awkward version of it after.

If the due date passes and you haven't received payment, don't panic and don't assume the worst. The most common reason invoices are paid late is that the client forgot. They got busy. The email got buried. The invoice is sitting in someone's inbox waiting to be processed.

Your first follow-up should be friendly and assume it was an oversight:

Send this on or the day after the due date. Not a week later — the sooner you follow up, the sooner you get paid. This email recovers the majority of late invoices. Most clients respond, apologise for the delay, and pay within a few days.

If there's no response after 5–7 days, follow up again. This time, be a little more direct: "Following up on Invoice #INV-001 for $[amount], now [X] days overdue. Please let me know when you expect to process this." Still professional, but no longer casual.

Use the free reminder generator to write professional follow-up emails at every stage — from a gentle nudge to a firm final notice. It generates emails in five different tones so you can match the message to the situation without starting from scratch.

If you've sent multiple follow-ups over 30+ days and heard nothing, you have a few options — and a paper trail matters here. Make sure you have records of every follow-up you sent: date, method, what you said. This is important if things escalate.

Try a different channel. If you've been emailing, try calling or sending a message through LinkedIn or WhatsApp if that's appropriate for your relationship. Sometimes emails genuinely don't arrive, especially if they went to a spam folder.

Escalate the tone of your communication. Reference your late fee clause if it applies. "Invoice #INV-001 is now [X] days overdue. Per our agreement, a late fee of [amount] applies. The updated total is [amount]. Please confirm when you'll be processing this."

For larger amounts, small claims court is a real option in most countries and is specifically designed for situations like this — a clear debt owed by one party to another, with documentation. You don't need a lawyer for small claims in most jurisdictions. The existence of small claims as an option is worth mentioning in a final notice: "If I don't hear from you by [date], I'll need to consider other options."

Most importantly: keep tracking. When you have multiple invoices in flight, the ones that go quiet are the easiest to lose track of. A visual system — where every invoice has a status and a next follow-up date — means nothing falls through the cracks. InvoiceGrid shows you exactly who owes what, how overdue each invoice is, and when to follow up next. Looking for a starting point? See the free invoice template for freelancers or browse templates for 50+ professions.