Can I send staged invoices for a large building project?

Yes. You can send multiple invoices to the same customer for different stages of a build. Each invoice is tracked separately with its own reminder schedule.

Does WOPA work for builders who do multiple jobs per week?

You can send multiple invoices to the same customer. Each is tracked separately with its own reminder schedule.

Can I include materials and labour on the same invoice?

Yes. Describe the job however you like in the message to WOPA. The description goes on the invoice as you write it.

Whatsapp invoicing for builders

Invoice your building customers
from WhatsApp.

Finished an extension stage, a loft conversion, or a garden wall? Message WOPA and the invoice goes out by email while you clear the site. No app to open, no paperwork to chase.

Reserve founder pricing See how it works

Try WOPA now on WhatsAppScan the QR or tap to open a demo conversation with the WOPA bot.

Built for builders

Real builders jobs.
Invoiced in seconds.

Extension build (staged invoicing)

Second stage of a single-storey rear extension. Walls up, lintels in, ready for roof.

"Invoice Mark \u00a31,500 for extension stage 2, walls and lintels complete"

WOPA drafts the invoice, you confirm, and the PDF reaches Mark's inbox within minutes.

Loft conversion

Dormer loft conversion finished. Plastering, electrics, and final fix all signed off.

"Invoice Helen \u00a318,500 for dormer loft conversion, 3 Oak Drive"

WOPA creates the invoice with your saved bank details and emails the PDF to Helen. Reminders set at 7, 14, and 28 days.

Garden wall

Built a 12-metre brick garden wall with coping stones and a gate pier.

"Invoice Steve \u00a32,400 for garden wall build, 12m brick wall with copings"

Invoice drafted, approved, and sent. Ask "who hasn't paid?" any time to see what is outstanding.

How it works

Three steps.
All in WhatsApp.

Just ask WOPA

Send WOPA a message like you would a colleague. Customer name, amount, and what the work was. WOPA turns it into a draft invoice.

Preview and confirm

Review the customer, work, amount, due date, and bank details. Nothing leaves WhatsApp until you approve it.

WOPA emails the PDF

Your customer gets a proper PDF invoice by email. They do not need WhatsApp to receive or pay it. Reminders run at 7, 14, and 28 days.

Key features

Everything you need.
Nothing you don't.

No app needed

WOPA runs inside WhatsApp. No download, no login, no dashboard. You already have the app on your phone.

Professional PDF invoices

Your customers receive a clean A4 PDF invoice by email with your business name, bank details, and payment reference.

Automatic payment reminders

WOPA sends polite follow-ups at 7, 14, and 28 days. You can pause, stop, or adjust reminders from the chat.

Track outstanding invoices

Ask "who hasn't paid?" and WOPA shows every open invoice. Mark one paid and reminders stop immediately.

Invoice your building customers from WhatsApp.

Real builders jobs.Invoiced in seconds.