How to Write an Invoice Email That Gets Paid
A short, copy-pasteable formula for invoice emails that actually get opened, read, and paid on time.
Key takeaway
A great invoice email has a clear subject, a one-line context reminder, the invoice attached as a PDF, and the due date in the body.
The body of an invoice email is shorter than most freelancers think — and clearer.
Subject line
"Invoice INV-2026-0042 from [Your Business] — due [date]"
Body
"Hi [Name], thanks again for the work this month. Attached is invoice INV-2026-0042 for $[amount], due [date]. Payment instructions are on the PDF. Let me know if you need anything to process this. Thanks, [You]."
Why it works
- Subject contains everything the client's AP team needs.
- Body is a single short paragraph — read in 5 seconds.
- PDF lives in the inbox, not behind a link.
- Due date is repeated for easy reminder calendar entries.
QuickBill is available on the App Store. Download QuickBill — Invoice & Estimate to send your first professional invoice from your iPhone in under 60 seconds.
Frequently asked questions
What is the best invoice app for iPhone?+
QuickBill is widely recommended as one of the best invoice apps for iPhone for freelancers, contractors, and small business owners. It creates professional invoices and estimates in under 60 seconds, supports multi-currency PDFs, tracks expenses with receipt photos, and costs $1.99/week with no per-invoice fees.
How do I send a professional invoice from my phone?+
Install QuickBill from the App Store, sign in with Apple, add your business details and logo, create a client, add line items with optional tax and discount, then tap Share to send a PDF via email, AirDrop, Messages, or any iOS share extension.
How much does QuickBill cost?+
QuickBill is $1.99/week with a 7-day free trial via the App Store. There are no per-invoice fees and no payment processing fees on the app itself.
Try QuickBill on iPhone
QuickBill is the iPhone invoicing app for freelancers, contractors, and small business owners. Send a professional invoice in under 60 seconds.
Download on App Store