GJAM Invoice
For contractors

Invoice Generator Built for Contractors

Generate clean job invoices on the spot — labour, materials, call-out fees and any tax. Works in any currency and produces a printable PDF that customers can pay against the same day.

The pain you're trying to escape

  • Hand-written invoices that look unprofessional
  • No way to separate labour from materials clearly
  • Quoting and invoicing in two different formats
  • Job book references missing from the bill
Example for contractors

Invoice INV-2026-001

£1,440.00
  • Labour — Electrical rewire (16 hrs)16£1,040.00
  • Materials — cable, sockets, junction boxes1£320.00
  • Call-out fee1£80.00
Total£1,440.00

How contractors use this tool

Always reference the job number

Put the job/quote reference in the Invoice number (e.g. "JOB-1042") or in Notes so the customer can match it to your initial quote.

Separate labour and materials

Customers (and accountants) want to see what was labour vs what was material. Use separate lines for each.

Try it now

The generator below is configured for contractors. Replace the sample data with yours.

Your business

The vendor / 'From' details that appear on the invoice.

PNG / SVG / JPG up to 1.5 MB. Stored locally on your device.

Bill to

Your client's details.

Invoice details

Number, dates, currency and line items.

Line items

  • £0.00

Payment & notes

Bank details, terms, or anything else the client should see.

Frequently asked questions

Should I charge a call-out fee on the invoice?
Yes — list it as a clearly-named line item ("Call-out fee" or "Site visit fee"). It avoids disputes when the customer expected the visit to be free.

Built for other professions too