Invoice app for plumbers in London
Voice note in from the van, branded PDF invoice out in 15 seconds — a plumbers’ invoicing tool that lives entirely in WhatsApp.
£29.99/mo · 7 days free · no card needed
Start Free on WhatsAppA real London plumber’s voice note:
"Mrs Davies, Chelsea London, boiler install, Worcester Bosch twelve hundred, labour six hours."
What plumbers in London actually have to log on a job
- Gas Safe (if combi/boiler work) — Your Gas Safe number auto-prefixes every invoice; CP12 reminders fire 11 months after issue.
- Unvented G3 work — Cylinder model and discharge route captured as invoice notes; G3 cert PDF attaches to the WhatsApp thread.
- WaterSafe / WIAPS — WRAS-compliant fittings as a separate line item so commercial clients can audit.
- Legionella risk assessment — Store-and-recall template for landlord, HMO and care-home jobs.
- Building Regs Part G / Part H — Building-control sign-off PDF attaches inside the invoice thread.
What plumbers in London actually deal with
Thames Water (most of the capital) or Affinity Water (north-west outskirts)
ULEZ — every day, every postcode. If your van is non-compliant, that’s £12.50 per working day on top of fuel.
32 London boroughs plus the City — Building Control is handled borough-by-borough, and Part P notifications vary by borough route.
Victorian terraces, ex-council flats, Georgian conversions, modern new-builds around Docklands and Stratford. Old lead pipework still common in pre-1970 stock.
Serving Chelsea, Hackney, Clapham, Islington, Camden and the rest of Greater London. Parking restrictions (red routes, controlled parking zones, school streets) and the congestion charge zone make a 20-minute job a two-hour billing situation.
London callout rates run £75–£120 vs £45–£80 for the rest of the UK. Materials cost the same but travel time and congestion eat the margin. Holdfort doesn’t set your prices — your rates are yours — but it stops you from losing track of what’s owed, what’s paid, and what’s been expensed along the way. All through WhatsApp. No app to install, no portal to log into.
Questions from London plumbers
Yes. Set it once; every invoice and CP12 thereafter auto-prefixes the number, registration class and expiry — important for landlord work in London where letting agents check before paying.
Yes — reply to the WhatsApp with the CP12 PDF and it attaches to the invoice thread. The landlord gets one document with the gas safety record and the invoice.
Not as a separate line, but you can log them as receipts (photo the email or Dart Charge notice) and they’re captured as deductible vehicle expenses at tax time. Every charged day reduces your tax bill.
Yes — set your scheme (NICEIC, NAPIT, ELECSA, Stroma) once. Each invoice prints the scheme and your notification reference, which is what boroughs like Southwark and Lambeth ask for on Building Control self-certification.
They voice-note the invoice from inside the van before moving. Sixty seconds, invoice sent, and they’re out of the red route before the warden comes. It’s the main reason central-London trades signed up first.
Yes — quarterly-ready breakdowns and sole-trader categories. Required for self-employed earners over the MTD threshold from April 2026. See the MTD guide.
£29.99 per month, all in. 7 days free, no card needed to start. Founding-member price locked for life.
London plumber? Finish the job. Voice note the rest.
7 days free. 30 seconds to set up. Just WhatsApp.
Start Free on WhatsAppHold the fort. We’ve got the paperwork.