The best invoice app for tradespeople in the UK
Most invoicing software was designed for someone sat at a desk. If you're finishing a boiler swap at half four with cold hands, a twelve-field web form is the reason invoices end up going out on Sunday night — or three weeks late. Here's what actually matters.
1. Speed measured in seconds, not minutes
The single biggest predictor of getting paid is whether the invoice leaves site before you do. Look for an app where a job goes out in under a minute. Voice dictation beats typing every time on a phone: say "replace kitchen mixer tap one at one forty-five, callout sixty" and the line items should appear ready to send.
2. Works with no signal
Lofts, plant rooms, new-build sites and rural jobs all kill mobile data. An app that can't capture the job offline will lose it. Your invoices should queue on the device and sync the moment you get bars back.
3. VAT and tax handled properly
If you're VAT registered you need 20% applied correctly and shown as a separate line, with your VAT number on the document. If you're under the threshold you need to not show VAT at all — charging it when you're not registered is an offence. Whichever applies, set it once in your profile and never think about it again.
4. Sends the way your customers actually reply
Email gets ignored. WhatsApp and SMS get read. The right app gives you one tap to send a payment link or PDF over WhatsApp with the balance already written into the message, plus email for the customers who want a paper trail for their accountant.
5. Professional PDFs with your bank details
A quote that looks like a text message doesn't win the job. You want your trading name, a sequential invoice number (INV-0001, INV-0002…), itemised work, payment terms, your sort code and account number, and a signature block for sign-off on completion.
6. Quotes that become invoices
You quote, they accept, you do the work. You should not be retyping any of it. The quote should convert to an invoice in one tap, keeping the client details, the line items and the numbering intact.
7. A price that makes sense for a one-van business
Per-user-per-month accounting suites are overkill if all you need is quotes, invoices and receipts. Expect to pay around £19/month for a tool that does the job well, and be able to try it on a few real jobs before you commit.
How VanInvoice compares
VanInvoice was built around exactly this list: dictate the job, AI turns it into itemised lines, tax comes from your profile, and it goes out by WhatsApp, SMS or email as a branded PDF with your bank details on it. It works offline, numbers invoices sequentially, tracks Unpaid / Paid / Overdue and sends receipts automatically. First three jobs are free.