Sending an invoice is the part of freelancing that should take the least amount of time. Whether you’re using email, a shared link, or a dedicated invoicing tool, you have solid free options that won’t slow you down.
Method 1: PDF via email
The most common approach: create your invoice in Google Docs, Word, or an online generator, export it as a PDF, and email it as an attachment with a short message.
Keep the email brief: “Hi [Name], please find the invoice for [project] attached. Total due: $X by [date]. Let me know if you have any questions.”
This works for virtually any client. The downside is you have no visibility — you don’t know if the email went to spam, if they opened the PDF, or if they forwarded it to their accounts payable team.
Method 2: Shared link (Google Drive, Dropbox)
Upload your PDF to Google Drive or Dropbox and share a view-only link. This is marginally better than an attachment — you can see that the file was accessed in Drive analytics — but it’s still not a native invoice experience.
It works best when clients prefer not to deal with attachments or when the PDF is too large to email comfortably (rare for invoices, but possible with embedded images).
Method 3: Free invoicing tool with link delivery
This is the most useful free option for working freelancers. Tools like Waco let you create an invoice and send it as a branded link. When your client opens the link, you get a notification. They can view the invoice in their browser, download a PDF, or pay directly if you’ve connected a payment method.
The whole process — creating the invoice, sending it, and tracking the open — is included in the free plan. No credit card required to get started.
Knowing when a client opens your invoice changes how you follow up. Instead of guessing, you send your reminder only after you see they’ve viewed it — or escalate if they haven’t.
What to write in your invoice email
Whether you’re attaching a PDF or sharing a link, the email itself matters. A professional, short message builds confidence:
- Subject line: “Invoice #[number] — [Project Name]”
- Body: Thank them for the work, state the total and due date, and invite questions
- Sign off with your name and contact info
Avoid overly casual language on invoice emails even with friendly clients. It signals that payment is a business transaction, not an afterthought.
Tracking payment after you send
The gap between sending an invoice and receiving payment is where freelancers lose time. With a PDF-only workflow, you’re checking your bank account manually. With Waco’s free plan, you can see invoice status — viewed, not opened, overdue — at a glance and send a reminder with one click when a due date passes.
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