Beyond the bare essentials, a handful of optional additions can make an invoice noticeably more professional and reduce back-and-forth with clients.
Required fields
Invoice number, business and client details, invoice/due dates, itemized charges, tax, and total due — covered in detail in our How to Write an Invoice guide.
Worth adding
- Your logo — a small branding touch that makes an invoice look considerably more professional.
- A purchase order or reference number — if your client issued one, referencing it speeds up their internal approval process.
- Payment terms in plain language — not just a due date, but a note like “Net 30 from invoice date” removes any ambiguity.
- A thank-you note — small, but it costs nothing and reads well.
- Late fee policy — stating it upfront (even if you rarely enforce it) sets expectations before a payment is ever late.
Our free generator includes every field above — logo upload, reference numbers, and custom notes all built in.