Essential HeatingServices Limited

GAS ENGINEER INVOICE SOFTWARE

Your work. Your invoice. Your company.

Give customers a clear record of the work and amount due, with your business details on the A4 invoice. Quotes, invoices and certificates share one Essential account.

Create your free account
Fictional Oakfield Heating invoice showing company details and itemised work
FICTIONAL SAMPLE · NOT A CUSTOMER DOCUMENT
View the fictional invoice PDF. Original A4 output; additional pages are included in the PDF where needed.

What you can record

  • Customer and job details, quantities, unit prices and itemised totals
  • Optional VAT settings with the business VAT number when applicable
  • Same day, 15, 30 or 90 days, or a custom due date
  • Saved bank details, or Paid by cash on site with zero balance and no bank details
  • Separate invoice numbers and an issued snapshot

From completed work to invoice

Open Quotes & invoices, choose Invoice and select your payment terms. Add the work and totals, review the document and issue it when ready. If cash was already received, choose Paid by cash on site and record the date.

Free drafts. Paid document features.

A free Essential account can save supported quote and invoice drafts. The paid package includes issuing numbered documents, PDF downloads and sending through a connected company email. Applicable existing access grants are honoured.

Google sign-in is available for supported Gmail connections. Other supported email setups may need provider-specific configuration. Connecting a mailbox is optional; you can download the PDF instead.

Know what the document does

A due date records the terms you choose; Essential does not automatically collect your customer’s payment or send overdue reminders. The cash-paid option records a payment already received.

Start free. Issue with Essential.

Create a free account to save supported drafts. Issuing numbered customer documents and downloading the relevant PDFs/reports requires the paid package or an applicable existing access grant. Public sample PDFs contain fictional data and are free to view.

View current prices and the two-engineer allowance

Before you choose

Is this a free invoice generator?

Draft saving is free. Numbered customer documents and PDF downloads are included in the paid Essential package, unless your account has a legitimate access grant. You can download the fictional public samples without paying.

Do I need to enter my company details every time?

Save your company information in Company setup. New documents use those saved details. Invoice bank details and default payment terms can also be stored there. Keep this information accurate before issuing documents.

Useful next steps