- 1. HEATING & PLUMBING INVOICING SOFTWARE
- 2. SYNCS WITH YOUR ACCOUNTING SOFTWARE
- 3. QUOTE → INVOICE → PAID
- 4. From finished job to money in the bank.
- 5. Faster than ever.
- 6. Convert quotes or build new invoices from templates
- 7. Send on the spot — with a built-in payment link
- 8. Late payers get chased automatically
- 9. QUICK TO CREATE
- 10. Create an invoice in seconds and close the job on-site
- 11. EASY TO PAY
- 12. Make it easy for your customers to pay
- 13. LESS PAPERWORK
- 14. Stay organised and forget having to follow up
- 15. The difference invoicing software makes
- 16. Paper, spreadsheets, or generic accounting apps
- 17. Invoicing with Gas Engineer Software
- 18. TRY GES FOR FREE
- 19. Start your 14-day free trial
- 20. All-In-One Software For Heating & Plumbing Businesses
- 21. WIN MORE JOBS
- 22. Quotes & Estimates
- 23. GO PAPERLESS
- 24. Records & Certificates
- 25. GET PAID FASTER
- 26. Invoices & Payments
- 27. 2,300+ MANUALS
- 28. Boiler Manuals & AI Assist
- 29. CONNECT YOUR APPS
- 30. Integrations
- 31. STAY ORGANISED
- 32. Scheduling & Calendar
- 33. GET REPEAT BUSINESS
- 34. Automated Reminders
- 35. STREAMLINE WORK
- 36. Job Management
- 37. CRM SOFTWARE
- 38. Customer Management
- 39. EASY ACCESS CONTROL
- 40. User Management
- 41. LOOK PROFESSIONAL
- 42. Custom Workflows
- 43. Make your job easier withGas Engineer Software
- 44. Frequently Asked Questions
- 1. HEATING & PLUMBING INVOICING SOFTWARE
- 2. SYNCS WITH YOUR ACCOUNTING SOFTWARE
- 3. QUOTE → INVOICE → PAID
- 4. From finished job to money in the bank.
- 5. Faster than ever.
- 6. Convert quotes or build new invoices from templates
- 7. Send on the spot — with a built-in payment link
- 8. Late payers get chased automatically
- 9. QUICK TO CREATE
- 10. Create an invoice in seconds and close the job on-site
- 11. EASY TO PAY
- 12. Make it easy for your customers to pay
- 13. LESS PAPERWORK
- 14. Stay organised and forget having to follow up
- 15. The difference invoicing software makes
- 16. Paper, spreadsheets, or generic accounting apps
- 17. Invoicing with Gas Engineer Software
- 18. TRY GES FOR FREE
- 19. Start your 14-day free trial
- 20. All-In-One Software For Heating & Plumbing Businesses
- 21. WIN MORE JOBS
- 22. Quotes & Estimates
- 23. GO PAPERLESS
- 24. Records & Certificates
- 25. GET PAID FASTER
- 26. Invoices & Payments
- 27. 2,300+ MANUALS
- 28. Boiler Manuals & AI Assist
- 29. CONNECT YOUR APPS
- 30. Integrations
- 31. STAY ORGANISED
- 32. Scheduling & Calendar
- 33. GET REPEAT BUSINESS
- 34. Automated Reminders
- 35. STREAMLINE WORK
- 36. Job Management
- 37. CRM SOFTWARE
- 38. Customer Management
- 39. EASY ACCESS CONTROL
- 40. User Management
- 41. LOOK PROFESSIONAL
- 42. Custom Workflows
- 43. Make your job easier withGas Engineer Software
- 44. Frequently Asked Questions
HEATING & PLUMBING INVOICING SOFTWARE
Quick & easy invoices that get you paid faster
SYNCS WITH YOUR ACCOUNTING SOFTWARE
QUOTE → INVOICE → PAID
From finished job to money in the bank.
Faster than ever.
Invoicing should be where you get paid, not waste hours tracking payments and sending payment reminders. With GES, the whole quoting & invoicing journey lives inside one app — and it’s super easy.
Convert quotes or build new invoices from templates
One tap converts an existing quote into an invoice - or you can quickly put together a fresh invoice from template line items.
Send on the spot — with a built-in payment link
Tap Approve and the invoice gets emailed to your customer. Integrate with Crezco to get QR code and payment links automatically added to your invoice.
Reminder: invoice #INV-2088
Friendly reminder that invoice #INV-2088 (£612) is now 9 days overdue.
Pay £612 nowLate payers get chased automatically
Set up your reminder emails once, and have them go out automatically — so you can stop being your own collections team.
"Before I even leave the job and get home, I've already been paid."
QUICK TO CREATE
Create an invoice in seconds and close the job on-site
Template line items for common jobs, tasks, and parts
- Set parts, labour rates, and callout fees once
- Group common combinations into a single line — e.g. "annual boiler service"
- VAT rate held on each template so figures stay consistent across every invoice
Convert any accepted quote into an invoice — instantly
If a quote exists for the job, GES can convert it in one tap. Line items, VAT, customer details all carried over — no retyping, no transcription errors.
- One tap from the existing job record
- Edit either side and the link stays clean in your accounts
Pre-calculated VAT, broken out properly
VAT is calculated and shown separately on every invoice, so customers know exactly what they're paying for.
EASY TO PAY
Make it easy for your customers to pay
Instant payments by QR code or magic link without high fees
In-app discounts without scribbling on the invoice
Running a winter promo? Saying thanks to a loyal customer? Apply a discount to any invoice — percentage or fixed — and it shows up cleanly above the total.
Headed, branded, professional
Your logo, contact details, payment terms, and bank information on every invoice. Make you rinvoice look like the kind of business customers want to recommend.
LESS PAPERWORK
Stay organised and forget having to follow up
Automated payment reminders for the late payers
- Set email reminders to go out when an invoice is overdue. Day 3, 7, or 14 - you choose when.
- Customise the wording, and set up to 3 sequential reminders.
- Reminders stop the moment the invoice is paid
Sync to Xero, Quickbooks, or Sage
Every invoice, payment, and customer flows straight into your accounting package so there's no need for double data entry and Making Tax Digital quarterly submissions become easy.
One invoices list filtered for paid, outstanding & reconciled
All your invoices kept safe in the cloud, but downloadable whenever needed. Search for a specific invoice or flip through the tabs to quickly see who's paid and who hasn't.
The difference invoicing software makes
Paper, spreadsheets, or generic accounting apps
- Invoices written up in the evening — a week after the job
- Manual VAT calculations
- Chase late payers manually
- Enter everything into accounting softare at month-end
- Old invoices hard to find
Invoicing with Gas Engineer Software
- Invoice raised on-site in under a minute
- VAT calculated and added to every invoice
- Late payers get chased automatically
- Every invoice and payment syncs straight to Xero, QuickBooks, or Sage
- Search for any record in seconds
TRY GES FOR FREE
Start your 14-day free trial
Try GES, create invoices, and more in a 14-day free trial
- Unlimited invoices & certificates during trial
- Try every feature
- Free onboarding call included
- No credit card required
TRUSTED BY 7,000+ UK HEATING BUSINESSES
★★★★★
Based on 1500+ reviews
ALL FEATURES
All-In-One Software For Heating & Plumbing Businesses
WIN MORE JOBS
Quotes & Estimates
Create winning quotes in minutes with template line items. Then, convert them to invoices in one click.
GO PAPERLESS
Records & Certificates
All gas industry certificates. In your pocket, for every job.
GET PAID FASTER
Invoices & Payments
Convert quotesto invoices. Complete with easy & low-fee digital payments.
2,300+ MANUALS
Boiler Manuals & AI Assist
Get any information you need about a boiler in seconds with the GES app.
CONNECT YOUR APPS
Integrations
Save time by sending data to your accounting software and connecting to your analyser.
STAY ORGANISED
Scheduling & Calendar
Manage your jobs & team in one place.
GET REPEAT BUSINESS
Automated Reminders
Send service reminders & chase late payers — without lifting a finger.
STREAMLINE WORK
Job Management
Keep everything together with an activity history for all customers.
CRM SOFTWARE
Customer Management
Keep all of your customer details tidy & in one place.
EASY ACCESS CONTROL
User Management
Give users access to what they need.
LOOK PROFESSIONAL
Custom Workflows
Add your logo to your records, create custom job statuses, and more.
Paul Laborevics
York Heating and Plumbing Solutions
"The customer service is spot on. Time-saving software that helps keep me on track.
Very happy and satisfied."
Phil Shakespeare
Premium Heating Services Ltd
"Brilliant app. I’ve been using it for 3 months and it’s so easy to use for everything from certificates to service reminders and invoicing."
Brett Carey
Carey Plumbing & Heating
"From gas records to quotes, estimates, and invoices, it’s saved us so much time and money. I can’t recommend this more."
Make your job easier with
Gas Engineer Software
Efficient quoting, scheduling & certificates. All in one place.
GES helps you manage your heating & plumbing business and save hours each week on admin and paperwork.
INVOICES & PAYMENTS
Frequently Asked Questions
What's the best invoicing software for plumbers and gas engineers?
The best invoicing software for UK heating and plumbing businesses is the one built around how you actually work — site visits, certificates, parts and labour line items, VAT, and Gas Safe records. Generic tools like Wave or FreshBooks don’t know about CP12s. GES is purpose-built for trade businesses and used by 7,000+ UK engineers.
Does GES work with accounting software?
Yes. Every invoice, payment, and customer can sync automatically to Xero, QuickBooks, or Sage.
How does Gas Engineer Software help me get paid faster?
Three ways. First, invoices go out on-site, not a week later. Second, customers can pay in seconds via QR or magic link — most do, on the spot. Third, late payers get chased automatically with friendly email reminders at the cadence you set. We’ve seen businesses get paid 64% faster on average with payment reminders.
Learn more about our Payment Reminders here.
How does the software turn quotes into invoices?
Creating a quote in Gas Engineer Software is easy thanks to template line items and a user-friendly app. However, turning them to invoices is even easier.
Simply navigate to your existing records, click on the quote, and select “Convert to Invoice”. The app will do the rest!
What impact will digital quotes & invoices have on my service quality?
Digital quotes & invoices offer a few nice benefits for your customers, too. For example:
- They’re neat, orderly, and look professional
- They can be created in a fraction of the time, meaning they won’t have to sit around waiting.
- They also can’t be easily lost or misplaced
Is my invoice data safe?
Bank-level encryption, frequent backups, and Cyber Essentials certified. Your records are far safer than paper — no floods, no fires, no misplaced folders. Read more about our security →