- Can I quote a Polish-speaking homeowner in PL and invoice the German office in DE on the same boiler swap?
- Yes — that's the moat. Build the quote once, switch language with one tap, the PDF re-renders in Polish for the homeowner and in German for the office that pays. Both documents reference the same job number and the same VAT number. No translator, no re-typing, no other invoicing app for tradesmen does this.
- Burst pipe at 10 pm. Can I quote from the van right there?
- Yes. Pick from the library (copper 22, push-fit, isolation valve, drain-down, callout), the customer signs with a finger on the screen, the PDF goes by WhatsApp to the insurer before midnight. No signal in the basement? MarginTap stores locally and syncs the second the 4G comes back.
- I'm a Polish plumber based in the UK working German rentals — does VAT actually stay correct?
- Yes. Per-line VAT supports standard, reduced, zero-rated, reverse-charge and exempt. Set the default per client (your UK customers on UK VAT, your DE customers on DE reverse-charge for B2B), override per line when a reduced rate applies. The export to your accountant lands clean — one VAT number, line-by-line breakdown, no manual reconciliation.
- Does it work without internet — I lose signal in basement boiler rooms every job.
- Offline-first by default. Every quote and invoice writes to local storage on the phone. Lift shafts, cellars, half-built sites, ferries between IE and UK — MarginTap keeps working. The send queue flushes the moment reception returns and the PDF lands in WhatsApp without you touching it twice.
- How do I show the boiler manufacturer's commissioning certificate or warranty terms on the quote?
- Add the certificate reference in the line description or the quote footer ("Worcester Bosch Greenstar 8000 — 10-year manufacturer warranty, conditional on annual service"). MarginTap preserves the text verbatim when you convert quote to invoice, so the warranty trail survives the signature.
- Why €9.99/month when Tradify, Powered Now and Jobber charge per user?
- Because plumbers aren't agencies. MarginTap is flat €9.99/month, one trader, unlimited quotes and invoices, no per-seat tax. €79/year saves 34%. 14-day Pro trial, no card to start, cancel from the app. CSV export to your accountant is included on every tier.