How to Make an Invoice (What to Include, Step by Step, With an Example)

How do you make an invoice? Put your business name and contact details at the top, then the client's details. Add a unique invoice number, the issue date, and the due date. List each product or service as a line item with quantity, rate, and amount. Show the subtotal, any tax, and the total due. End with payment terms and clear instructions for how to pay. Send it as a PDF.

An invoice is a request for payment. Its job is to make paying you easy. A client who has to email back to ask "which project is this?" or "what is your bank account?" pays later. A clear invoice answers every question before it is asked.

This guide covers what to include, how to make one step by step, how to number invoices, and what to write in the payment terms. If you want a finished layout, the free invoice template has every field below.

What to include on an invoice

Field	Example	Why it matters
Your business name and contact details	Maya Okafor Studio, address, email, phone	The client knows who billed them
Client name and address	Westbrook Media Group, Attn: Jordan Ellis	Gets the invoice to the right person
The word "Invoice"	Invoice	Separates it from a quote or estimate
Invoice number	INV-2024-047	Tracking and payment references
Issue date	3 March 2025	Starts the payment term
Due date	2 April 2025	Removes guesswork
Line items	Description, quantity, rate, amount	Shows what the client pays for
Subtotal, tax, total	$5,050.00 + tax = $5,498.19	The amount owed
Payment terms	Net 30, late fee policy	Sets expectations
Payment methods	Bank transfer, PayPal, check	Tells the client how to pay

Depending on where you work, you may also need a tax registration number (for example a VAT or GST number), the client's tax number, or a specific tax breakdown. The rules differ by country and state. Check local law or ask an accountant before you send your first invoice.

Line items

Write each line so that someone in the client's finance team, who never saw the project, can approve it. "Design work" is vague. "Brand style guide, print-ready PDF, 24 pages" is clear. Give a quantity and a rate for each line, even when the quantity is 1. Extra work, such as additional revision rounds or a rush fee, belongs on its own line.

Payment terms

Payment terms tell the client when the money is due. Common terms:

• Due on receipt: pay now. Common for small jobs and one-off sales.
• Net 15 / Net 30 / Net 60: pay within 15, 30, or 60 days of the invoice date. Net 30 is a common default for business clients.
• Deposit and balance: for example, 50% up front and 50% on delivery. Common for larger projects.
• Milestone billing: you bill the project by stage or phase. A milestone invoice lists each phase as its own line item.

If you charge a late fee, state it on the invoice, and make sure it was in your contract. Limits on late fees differ by location, so check local rules.

How to make an invoice, step by step

1. Check the agreement. Look at the quote, proposal, or contract. The invoice should match the agreed price and scope. If you sent a quote first, use it as the source for the line items.
2. Add your details and the client's. Use the client's legal business name. Ask who should receive invoices. In larger companies, it is often accounts payable, not your project contact.
3. Give it a unique number. Use a sequence you can keep, such as INV-2025-001, INV-2025-002. Never reuse a number.
4. Set the dates. Add the issue date and a clear due date. "Due 2 April 2025" is clearer than "Net 30" alone, so use both.
5. List the line items. Description, quantity, rate, amount. Add any purchase order (PO) number the client gave you. Some finance teams cannot pay without it.
6. Calculate the totals. Subtotal, discounts, tax at the correct rate, and the total due. Check the math twice.
7. Add payment instructions. Bank details, payment link, or who to make a check payable to. Ask the client to quote the invoice number with the payment.
8. Export it as a PDF and send it. A PDF looks the same on every device and cannot be changed by accident. Name the file with the invoice number, for example INV-2024-047-Maya-Okafor-Studio.pdf.
9. Track it. Record the invoice in a spreadsheet or accounting tool. Follow up politely a few days before the due date and again on the day after.

Invoice example

Here is a worked example. The business, client, and numbers are invented to show the format. The same example is pre-filled in our freelance invoice layout.

From: Maya Okafor Studio, Brooklyn, NY Bill to: Westbrook Media Group, New York, NY, Attn: Jordan Ellis Invoice: INV-2024-047 | Issued: 3 March 2025 | Due: 2 April 2025 | Terms: Net 30

Description	Qty	Rate	Amount
Brand identity system: logo, color palette, typography	1	$3,500.00	$3,500.00
Logo revision rounds beyond included scope	2	$200.00	$400.00
Brand style guide, print-ready PDF, 24 pages	1	$800.00	$800.00
Rush delivery, final files within 5 business days	1	$350.00	$350.00
Subtotal			$5,050.00
Tax (8.875%)			$448.19
Total due			$5,498.19

Payment: Bank transfer (preferred), PayPal, or check payable to Maya Okafor Studio. Please reference INV-2024-047. Late payments are subject to a 1.5% monthly fee.

Whether sales tax applies to a service like design depends on the state or country. The tax line here is part of the example, not a rule.

Common invoice mistakes

• No due date. "Payment due" with no date means "whenever". Always give a date.
• Vague line items. These get queried, and a queried invoice waits in a queue.
• Wrong recipient. Your project contact may not pay invoices. Ask who does.
• Missing PO number. Many larger clients reject invoices without one.
• Duplicate or skipped numbers. These confuse your own records and your accountant.
• Payment details hidden or missing. Put them on the invoice itself, not in a separate email.
• Sending an editable file. A Word or spreadsheet file can be changed and may look different on the client's screen. Send a PDF. For more, see how to go from Word or Google Docs to a professional PDF.

Which invoice format should you use?

A one-page invoice is right for most work. Pick the layout that fits how you bill:

• Freelancers and studios: the invoice template with line items, tax, and payment methods.
• Shops and local businesses: the small business invoice, built for product sales, with quantities and a returns line.
• Long projects: the milestone invoice, which bills each project phase as a separate line.

You can compare every layout in all invoice and billing templates. A clean design is not decoration here. A clear total and a visible due date help the client's finance team process it faster. The guide on how to design a professional PDF covers the basics of layout and hierarchy.

Make your invoice with BuildPDFs

With BuildPDFs, you describe the job: who you are, who the client is, what you delivered, your rates, the tax rate, and your payment terms. The AI drafts the invoice on the template with the line items, totals, and payment details in place. You edit any field in chat or directly on the page, then export a print-ready PDF to send. The AI invoice generator is the fastest way to start.

FAQ

Can I make an invoice if I am not a registered business?

In many places, yes. Freelancers and sole traders often invoice under their own name. You may still need to report the income and, above some thresholds, register for tax. Check local law.

What is the difference between an invoice and a receipt?

An invoice asks for payment. A receipt confirms that payment was received. You send the invoice first, and a receipt (or a "Paid" invoice) after the money arrives.

What is the difference between a quote and an invoice?

A quote is a price offer before the work starts. The client can accept or reject it. An invoice requests payment for work that was agreed or delivered.

How should I number my invoices?

Use one sequential format and never reuse a number. A year prefix such as INV-2025-001 keeps the sequence readable and resets cleanly each year. Some countries have rules on invoice numbering, so check local requirements.