Wedge

WhatsApp invoicing for plumbers

Send the invoice for a Sunday boiler call-out before you've put your spanner down. Wedge turns a WhatsApp message into a professional invoice with a Stripe payment link — and only takes 1% when your customer pays, capped at £50 per invoice.

Wedge
Wedge
Invoice Dave Smith £350 for kitchen tiling

Wedge

Invoice INV-014 for £350 sent to Dave Smith. ✉️

Wedge

Dave Smith paid £350 for INV-014. 💰
Get started for free

Only pay when you get paid. 1% per invoice, capped at £50.

STEP 01

Send a message

Text Wedge on WhatsApp with the job details, customer name, and amount.

9:41
Wedge
Wedge

Message

STEP 02

We handle the rest

Wedge creates a professional invoice and emails it to your customer with a payment link.

9:41

From: invoices@wedge.uk

Invoice INV-014 from Mike's Tiling

Mike's Tiling

mike@example.com

INV-014

8 Mar 2026

Bill to

Dave Smith

Kitchen tiling£350.00
Total due£350.00

Secure payment powered by Stripe

STEP 03

Get paid

Your customer pays online. You get a WhatsApp notification when the money lands.

9:41
Wedge
Wedge

Message

Everything you need to get paid

-WhatsApp-native

No app to install. Just message Wedge on WhatsApp like you would a mate.

-AI-powered parsing

Tell us who to invoice and how much. We figure out the rest.

-Professional invoices

Clean, branded PDF invoices sent straight to your customer via WhatsApp.

-Stripe payments

Your customers pay online by card. Money lands in your bank account.

-Automatic reminders

We chase late payers so you don't have to. Polite but persistent.

-VAT support

VAT-registered? We calculate and show VAT on every invoice automatically.

A real job

A real Sunday emergency call-out

It's 9pm on a Sunday and Dave's boiler has packed in. You drive out, replace the diverter valve, and bleed the system. Total: £350 (£180 call-out + £100 labour + £70 parts). Sitting in the van afterwards, you message Wedge: "Invoice Dave Smith £350 for emergency boiler call-out, parts and labour." Wedge generates a clean PDF invoice, breaks out the parts and labour line items, sends it to Dave on WhatsApp with a card payment link, and chases him on day three if he hasn't paid. When Dave pays, £346.50 lands in your bank account — Wedge keeps £3.50. No subscription, no monthly fee, nothing to remember to cancel. If Dave never pays, Wedge never charges you.

Free forever. 1% only when your customer pays — capped at £50 per invoice.

No subscription, no setup fee, no card-on-file fee. We only earn when you actually get paid.

Only pay when you get paid
1% per paid invoice

Free forever. No monthly fee.

  • Unlimited invoices & quotes
  • Expense tracking
  • WhatsApp notifications
  • Stripe payment links
  • Automatic reminders
  • Professional PDF invoices
  • VAT support

See the math

Type any invoice amount. Toggle the payment method to compare.

£
Invoice amount£495.00
Stripe processing (1.5% + £0.20)−£7.63
Wedge fee (1%)−£4.95
You receive£482.42

Bank-transfer invoices remain free — we only charge when the customer pays by card or Open Banking.

Frequently asked questions

Can I show my Gas Safe number on every invoice?+

Yes. Add your Gas Safe registration number once during sign-up and it appears on every invoice and quote you send — required for any gas work and reassuring for customers.

How do I split parts and labour on emergency call-outs?+

Just tell Wedge in plain English: "£180 call-out, £100 labour, £70 for the diverter valve." Our AI breaks it into separate line items on the invoice. You can also add VAT, mark items as zero-rated, or note them as parts-only.

What about call-out fees versus hourly rates?+

However you charge, Wedge takes it as you describe it. Mention "£90 call-out plus £55/hour for 2.5 hours" and Wedge generates clear line items with the maths done. Your customer sees exactly what they're paying for.

Can customers pay before I leave the property?+

Yes — the WhatsApp message includes a Stripe payment link. Most card payments confirm in seconds. You'll get a WhatsApp notification when the money lands, often before you've packed the van.

How do I invoice for boiler servicing contracts?+

Annual service plans work the same way — send the customer their yearly invoice via WhatsApp when the service is due. For ongoing maintenance contracts where you bill monthly, just message Wedge each month.

I subcontract for a heating company — can I invoice them with VAT?+

Yes. If you're VAT-registered, toggle that on at sign-up and Wedge calculates 20% VAT automatically. You can also invoice with reverse-charge VAT for CIS-style B2B work — just mention it when sending.

Ready to stop chasing invoices?

Join tradespeople across the UK who get paid faster with Wedge.

Get started for free

© 2026 Wedge AI Ltd. All rights reserved.

Invoicing for Plumbers — WhatsApp Invoicing | Wedge