Small invoicing missteps can undercut an otherwise strong client relationship. Here are the most common ones worth fixing.
Sending a Word document or plain email instead of a real invoice
A properly formatted, clearly labeled invoice — even a simple one — looks far more professional than an ad-hoc email listing an amount owed.
Inconsistent numbering or formatting
Jumping between different templates, fonts, or numbering styles between invoices signals disorganization.
Typos in the client's name or company
Getting basic details wrong suggests a lack of attention to detail — always double-check names and spellings before sending.
Vague line item descriptions
Generic descriptions like 'services' invite unnecessary questions and can look like you're hiding something, even unintentionally.
Missing or unclear due dates
As covered elsewhere, this is one of the most common and most damaging omissions on an invoice.
No consistent invoice number
Skipping or duplicating invoice numbers signals a lack of a real business process behind the scenes.
The fix for all of these
A consistent, well-designed template — used every time — solves nearly every mistake on this list automatically.