How to Write an Invoice
A clear invoice helps freelancers get paid faster because it removes doubt. The client can see who sent the bill, what work was completed, how much is due, and when payment should be made. However, before you send your first bill, it's important to choose the best freelance payment method to avoid losing money on bank fees.
What to Include on Every Invoice
Every invoice should include your business name, contact details, client name, invoice number, invoice date, due date, itemized services, subtotal, tax if applicable, total, and payment terms. If the client uses purchase orders or project codes, include those references too.
Step-by-Step Guide
- Choose a simple invoice number such as INV-1001.
- Add your business and client details.
- Describe each service in plain language.
- Enter quantity, rate, tax, and total.
- Add payment terms and review the preview.
- Download the PDF and send it to the client.
Invoice Numbering Best Practices
Use a numbering system you can repeat. Do not reuse invoice numbers. Many freelancers start with INV-1001 and increase the number for each new invoice.
Payment Terms Explained
Payment terms tell the client when payment is due. Net 15 means payment is due within 15 days. Net 30 means payment is due within 30 days. If you charge deposits or late fees, state that clearly in your agreement and invoice notes.
Common Invoice Mistakes
- Using vague service descriptions
- Forgetting the due date
- Not showing tax separately
- Sending editable documents when a PDF is better
- Leaving out payment instructions
Static Invoice Example
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Freelance Project Fee | 1 | $400.00 | $400.00 |
| Freelance Revision Round | 1 | $525.00 | $525.00 |
| Freelance Rush Fee | 1 | $650.00 | $650.00 |
| Total | $1,575.00 | ||
Invoice Checklist
- Business and client names are correct
- Invoice number is unique
- Dates and payment terms are clear
- Line items match the agreement
- Total amount is correct
Ready to create one? Use the free invoice generator or compare invoices, receipts, and estimates.
FAQ
How do I write my first invoice?
Use SoloBilling when you need a clear, professional billing document without a complex accounting workflow. Review all details before sending any document to a client.
What payment terms should freelancers use?
Yes, the SoloBilling invoice generator is 100% free for articles. There are no hidden fees, no watermarks, and no signup requirements for creating professional PDF documents.
Should invoices be sent as PDF?
Yes, once you have filled in your article details, you can download a clean, professional PDF instantly. The document is formatted for standard A4 or Letter printing and contains no SoloBilling watermarks.
Can I invoice without a company?
Use SoloBilling when you need a clear, professional billing document without a complex accounting workflow. Review all details before sending any document to a client.
What happens if a client pays late?
Use SoloBilling when you need a clear, professional billing document without a complex accounting workflow. Review all details before sending any document to a client.