Best software for heating engineers
A short, honest guide to the tools UK heating engineers actually use day to day. Job management, invoicing, and Gas Safe certificates. No affiliate fluff, no fifty tab spreadsheet.
Updated June 2026 / 6 min read
Most engineers we talk to are losing two evenings a week to paperwork. Quotes typed twice. CP12s photographed and emailed. Invoices chased on WhatsApp. The right software pulls that back to about an hour.
The three things worth paying for, in order:
- A job management tool that handles the diary, quotes, and invoices.
- Bookkeeping software your accountant can actually use.
- A way to issue Gas Safe and OFTEC certificates from the van.
You can often get all three from a single app. Below are the ones worth a look in 2026.
Diary, quotes, and invoices in one place
If you only buy one tool, buy this. A proper job management system replaces your notebook, your separate quoting doc, and most of your chase up messages.
Commusoft
Best for growing teamsFrom around £59/user/mo
Powerful scheduling, parts ordering, planned servicing, and full certificate library. Overkill for a sole trader, brilliant once you have two or more vans.
Joblogic
Best for service contractsFrom around £40/user/mo
Strong on planned preventative maintenance and commercial contracts. Engineer app works well offline in plant rooms with no signal.
Payaca
Best for sole tradersFree tier, paid from around £19/mo
Clean quotes and invoices, finance integrations, and good automated chasing for unpaid jobs. Built in the UK for trades.
Powered Now
Best simple all-in-oneFrom around £15/mo
Quotes, invoices, certificates, and a basic diary in one app. Designed to work on a phone first.
Pick what your accountant uses
Your accountant has a strong preference. Ask them first. Picking the same tool saves a few hundred pounds a year in bookkeeping time.
Xero
Best for your accountantFrom around £16/mo
Almost every UK accountant uses it. Pairs with Hubdoc for receipt capture and connects to most job management tools.
QuickBooks
Best for VAT and MTDFrom around £16/mo
Solid Making Tax Digital workflow and mileage tracking from the phone app. Good if you want to do most of the bookkeeping yourself.
FreeAgent
Best free with NatWestFree with a NatWest, RBS, or Mettle business account
Genuinely free if you bank with NatWest or use Mettle. Aimed at sole traders and small limited companies.
Issue CP12s from the van
Most job management tools above include certificates. If you already have a stack you like and just need cleaner CP12s, these focused apps are cheaper and faster.
Gas Tag
Best for landlords and letting agentsCustom pricing
NFC tags on appliances and digital CP12s. Worth it if you work for property managers who insist on tagged audit trails.
Gas Engineer Software
Best dedicated certificate appFrom around £15/mo
Every Gas Safe and OFTEC form you actually need. Cheap, focused, and exports clean PDFs you can email straight from the van.
CertParrot
Best low cost optionFrom around £8/mo
If all you need is to email a CP12 from your phone without buying a full job management system, this does the job.
If you are starting from scratch
- Payaca for jobs, quotes, invoices, and certificates
- FreeAgent if you bank with NatWest or Mettle, otherwise Xero
- A clean website and Google profile so customers can find you
Total monthly cost, all in: usually under £35 a month. About one boiler service.
Common questions
Software saves time. A site gets you found.
We build clean, fast websites for UK heating engineers. Usually live within 48 hours. No agency, no calls, no monthly trap.