How to Send an Invoice (and Get It Paid Faster)
How you send an invoice matters almost as much as what is on it. The goal is simple: land in the right inbox, in a format the client can process without thinking, at a moment when paying is easy.
PDF by email is the standard
Attach the invoice as a PDF — universally readable, uneditable, and printable. Put the invoice number and amount in the subject line (“Invoice INV-2026-014 — $1,250 due Nov 14”) so it is searchable and clear before it is even opened.
Send it to the right person. For companies, that is usually accounts payable, not your day-to-day contact. Ask for the billing contact’s email when you start a project.
Timing and follow-through
Send invoices during business hours on a weekday — Monday to Thursday mornings get the fastest processing. Invoicing on Friday evening means sitting unread all weekend.
Confirm receipt a day or two later with a short check-in. Then calendar your follow-ups: a reminder the day after the due date, and weekly after that. Systematic follow-up is what separates businesses that get paid from those that wait.
Frequently asked questions
Should I send invoices as PDF or Word?
Always PDF. Word documents can be edited and often render differently on the recipient’s machine. PDF is the professional standard.
What should the invoice email say?
Keep it short: greet, state the invoice number and amount, note the due date, and say how to pay. Attach the PDF and offer to answer questions.
Is it okay to send invoices on weekends?
You can, but weekday mornings get processed faster. If you finish work on Sunday, scheduling the send for Monday morning is a small trick that works.
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