AI Invoice Generator.
Invoicing for plumbers.
Say the job the way you would to a mate and the invoice writes itself - VAT exact, your logo on it, done before you are out of the van.
No signup, no card needed to try it.
Say it like you would say it
"Invoice Mrs Jones 320 for a leaking tap repair and a new washer, due in 14 days"
That is the whole job. The AI writes the lines, deterministic code does every sum in exact pence, and the invoice is ready to send with your logo on it.
The paperwork after the callout
The job took an hour. The invoice takes the evening.
Plumbing pays by the job, and the job is not finished until the invoice is out. Which is why it is 9pm and you are still up.
Invoicing from the van
The details are freshest the moment you finish - but typing line items into a template on a phone never happens. So it waits, and so does your money.
Parts, labour and VAT maths
A callout, two hours labour, three parts, VAT on top - one wrong figure looks amateur and takes two emails to fix.
Chasing customers you like
The awkward part of a late invoice is that you want the repeat work. Someone has to nudge - it should not have to be you.
Instant professional templates
Send something that looks like you charge properly
An invoice that looks thrown together gets treated like one. Pick from 26 designs - these are the real ones, not pictures of them - and switch at any point, before or after you have written it. Your logo and colours go on top.
Luxury
Tradesman
Luxury Gold
Why your accountant can relax
The AI writes. It does not count.
Language models are good with words and unreliable with arithmetic, so DocMason only lets them do the first part. Every figure on a document you send is worked out by ordinary code, in exact pence, the same way every time.
It is the difference between a tool you check afterwards and one you can send without reading twice.
- VAT, discounts and totals calculated in code, never by the AI
- Money held in exact pence, so rounding cannot drift
- Every email sent on your behalf is stored in full, so you can read exactly what went out and to whom
- Your data hosted in the EU, never used to train AI models
FAQs
Questions from plumbers, answered straight
The free tier, the maths, and how invoicing fits the way plumbers actually work. Everything else is on the full page.
Something else on your mind? Ask a human.
Can it handle callout charges and parts?
Yes - say the whole job in one sentence ('callout 60, two hours at 45, parts 38.50') and each becomes its own line with the maths done in exact pence by code, never by the AI. Edit any line in the chat afterwards.
Does it chase late payers for me?
On the Growth plan, yes. QuoteChaser sends a polite nudge the day after the due date and a firmer reminder a week later, from your business name, never threatening fees. It stops the moment you mark the invoice paid.
Is it really free?
Yes. Build and preview an invoice with no account at all, and create a free account when you want the PDF. The free plan includes 3 invoices and 3 quotes every month with all 26 designs - no card needed. Starter at 9.99 GBP a month makes them unlimited.
Does the AI do the maths?
No, and that is deliberate. The AI reads what you typed; plain deterministic code computes every total, discount and VAT figure in exact pence. AI is good at language and bad at arithmetic, so it only does the first one.
Want the whole picture? See everything the invoice generator does.
Your next invoice takes a minute
3 free invoices a month. Describe the job like you would say it, and see for yourself.