Free Invoice Templates by Profession

Pick your profession below for a guide covering what to include on your invoice, common mistakes that delay payment, and tips for getting paid faster. Each guide also covers how to track and follow up on unpaid invoices. For UK businesses, see HMRC's full invoice requirements.

What Every Invoice Should Include

Regardless of profession, every professional invoice needs these elements:

  • Your name or business name with contact information
  • Client's name, company, and billing address
  • Unique invoice number for your records
  • Itemized list of services with clear descriptions
  • Amount due with currency
  • Payment terms with an explicit due date (e.g., due March 15, 2026)
  • Accepted payment methods with account details

Once You've Sent the Invoice

Sending the invoice is only half the job. Use these free tools to calculate due dates, track late fees, plan follow-ups, and generate professional reminder emails — no signup required.