Invoicing for Beginners: Complete Guide to Your First Invoice

Q: What should a beginner put on an invoice?

Your name, address, client info, invoice number, date, due date, description of work, line items, total, and payment details.

Never invoiced before? No stress. This guide covers everything — what an invoice actually is, how to create and send your first one, and how to make sure you actually get paid.

What Is an Invoice? (Plain English)

An invoice is a document that says: "I did X work for you. Please pay me Y amount by Z date."

More formally, an invoice creates a legal record of a business transaction. It proves you completed the work, states the agreed price, and establishes a payment deadline. Both you and the client keep a copy.

Invoices are also required for tax. Most tax authorities require you to keep invoice records for 5–7 years. No invoice = no proof of income = potential problems.

Your First Invoice — Step by Step

1
Choose a tool. Easiest option: Chaser (free tier, professional PDF in 2 minutes). Alternatives: Google Docs template, Word, or our free invoice generator at /tools/invoice-generator.
2
Add your information. Your full name (or business name), address, email, and bank account details. If you're VAT/GST registered, add your tax number.
3
Add your client's information. Client name, company name, and billing address. Some clients have a specific billing email — ask before you send.
4
Describe the work. Be specific. 'Web design project' is okay. 'Homepage redesign — 15 hours × €80/hr' is better. Clear descriptions reduce disputes.
5
Set the price. List each service or product on its own line. Show quantity, unit price, and line total. Add VAT or sales tax if applicable.
6
Choose payment terms — Net 14 for beginners. Net 14 = pay within 14 days. This is a great starting point. Short enough to keep cash flowing, long enough to be reasonable.
7
Add your bank details. Make it easy to pay. Include bank name, account number, sort code / IBAN / routing number — whatever applies in your country. Friction = delay.
8
Send it!. Email the invoice as a PDF. Subject: 'Invoice INV-001 — [Project] — Due [Date]'. Keep it professional and simple.

Invoice Numbering — The Rules

Every invoice needs a unique number. This is your reference and the tax authority's reference.

✅ Good formats

INV-001 — simple sequential
2026-001 — year-first (recommended)

❌ Never do this

Skip numbers (gaps look suspicious)
Reuse a number (ever)
Delete an old invoice

If you make a mistake on an invoice: issue a credit note referencing the original, then create a corrected invoice with the next sequential number.

What to Do After Sending

Most beginners send the invoice and then wait. Hopefully. Anxiously. The professional move: follow up if it's not paid by the due date.

Send a short reminder: "Hi, invoice INV-001 for [amount] was due today — please let me know if you need anything." Most of the time that's all it takes.

If following up feels awkward, Chaser automates reminders at day 3, 7, 14, and 30 — the right message, automatically, so you never have to write the uncomfortable chase email.

First Year Invoicing Checklist

☐Set up a professional email address (firstname@yourdomain.com)

☐Create your first invoice template with your branding

☐Open a business bank account (separate from personal)

☐Keep all invoice copies for at least 7 years

☐Register for VAT/GST if your annual revenue will exceed the threshold

☐Note your payment terms on every invoice (Net 14 or Net 30)

☐Follow up on every overdue invoice — do not let them slide

Ready to send your first invoice? 🐕

Chaser creates professional invoices and automatically follows up until you get paid. Perfect for beginners — 2-minute setup.

Try Chaser Free →

Frequently Asked Questions

What should a beginner put on an invoice?

Your name/business, address, contact info, client's name and address, invoice number, date, due date, description of work, line items with prices, total, and your payment details.

Do I need to register a business to send invoices?

In most countries you can invoice as a sole trader/freelancer without registering a company. In the Netherlands you need a KvK number. In the UK, sole traders can invoice with just their name.

What payment terms should a beginner use?

Net 14 (pay within 14 days) is a great starting point. It keeps cash flow healthy and is reasonable for most clients.

How do I know if my invoice was received?

Standard practice: follow up 2-3 days after sending if no acknowledgement. Chaser tracks when the client opens the invoice, so you know exactly when they've seen it.