How to Send a Voice Invoice on WhatsApp in 30 Seconds (2026 Guide)

Joe the electrician used to spend every Sunday evening at his kitchen table, typing up invoices from a week's worth of handwritten notes. A stack of job sheets, a cup of cold tea, and two hours of his weekend gone.

Now he invoices from the van before he pulls out of the customer's driveway. The whole thing takes 30 seconds. Here's exactly how he does it — and how you can too.

What is Voice Invoicing via WhatsApp?

Voice invoicing means sending a WhatsApp voice note to describe a job you've just completed, and having an AI automatically generate and email a professional PDF invoice to your client. No app to download. No form to fill out. Just talk, confirm, and it's done.

VoiceInvoice receives your voice note, transcribes it, extracts the key details (client name, address, work done, amount, VAT), builds a professional invoice, and emails it directly to your client. You get a copy too.

Step-by-Step: How to Send a Voice Invoice

What to Say in Your Voice Note

You don't need a script. Just include these four things naturally:

• Client name — first name, full name, or business name
• Address or location — even "the house in Enniscorthy" works if they're a repeat client
• What you did — describe the job in plain English
• Amount — the price, hourly rate, or materials cost

Here are some real examples of what to say:

Tips for Irish Tradespeople

Let VoiceInvoice handle the VAT

In Ireland, labour on construction and repair work is taxed at 13.5% VAT, while materials and parts are at 23%. Just mention "labour" and "parts" separately in your voice note and VoiceInvoice calculates both rates automatically. No mental arithmetic needed.

Quote first, invoice later

Start your voice note with "Quote for..." and you get a professional quotation instead of an invoice. It'll be numbered QT-0001, marked "Valid for 30 days", and when you win the job, just say "Convert QT-0001 to invoice" and it's done.

Repeat clients are even faster

VoiceInvoice remembers your clients. If you've invoiced Murphy's Garage before, just say "invoice for Murphy's Garage" and their address and contact details are filled in automatically.

Make corrections before sending

Got the price wrong? Just say "change the amount to €350" or "add €40 for parking" and the preview updates. Nothing goes to your client until you say "Yes, send it."

Invoice immediately after every job

The fastest path to getting paid is invoicing the moment you finish. Studies show invoices sent on the day of completion are paid significantly faster than those sent a week later. With a 30-second voice invoice, there's no reason to wait.

What the Invoice Looks Like

Your client receives a professional PDF with:

• Your business name, address, and logo
• Your VAT number (if registered)
• A sequential invoice number (INV-0001, INV-0002, etc.)
• Itemised line items with correct VAT applied
• The total including VAT
• Your payment details

It looks like something a large company would produce — because that's what your clients expect, and what Revenue requires.

Frequently Asked Questions

Do I need any special equipment?

No. Just WhatsApp on your existing phone. VoiceInvoice works on any smartphone — iPhone or Android. No headset, microphone, or extra hardware needed.

What if I'm not VAT registered?

No problem. Set your account to "not VAT registered" during setup and VoiceInvoice will generate clean invoices without any VAT amounts. You can update this at any time if your turnover grows and you need to register.

Can I invoice in the pub car park?

Absolutely. As long as you have a signal, you can send a voice invoice anywhere. Most trades people invoice before they start the van.