How to Create a Professional Invoice (Freelancer's Guide)

What Every Invoice Must Include

• Your name/business name and address
• Client's name/business and address
• Unique invoice number (sequential: INV-001, INV-002...)
• Invoice date and due date
• Itemised list of services/products with quantities and rates
• Subtotal, tax (if applicable), and total amount due
• Payment methods accepted (bank transfer, PayPal, etc.)
• Your bank details for direct transfer

Payment Terms

• Due on receipt: Payment expected immediately
• Net 15: Payment due within 15 days
• Net 30: Payment due within 30 days (most common)
• 50% upfront: Half before work starts, half on completion

Tip: Shorter payment terms = faster cash flow. Start with Net 15 for new clients.

Invoice Numbering

Keep it simple and sequential. Options:

• INV-001, INV-002, INV-003...
• 2026-001, 2026-002 (year-based)
• CLIENT-001 (per-client tracking)

Never skip or reuse numbers — it looks unprofessional and causes accounting headaches.

When to Send

• Send immediately upon project completion
• For ongoing work: invoice monthly on the same date
• For large projects: invoice milestones (25%, 50%, 75%, 100%)

Chasing Late Payments

1. Day 1 past due: Friendly reminder email
2. Day 7: Follow up with original invoice attached
3. Day 14: Phone call + formal late notice
4. Day 30+: Consider late fees (state in your terms upfront)