Invoice app for gas engineers

Turn your voice into a gas engineer invoice before the admin follows you home.

Describe the job on your phone. Check a professional gas engineer quote or invoice, then choose how to share it. Manage the rest of your paperwork in one place.

Create your first invoice free

5 documents free. No card required.

New invoice

Try it live.

Tap the mic. Say the job.

Audio isn't saved

Listening. Tap the mic when finished.

Try: “Invoice Sarah £120 labour, £35 parts, plus VAT.”

Useful for gas engineers jobs

boiler servicinglandlord checksrepairspartscertificates

Honest by design

You stay in control.

Editable first

SayInvoice prepares a draft. You check every customer, job, price, VAT or CIS setting and term.

Prepared is not sent

Sharing stays yours

SayInvoice opens an external sharing option with the PDF ready. You complete the final send.

Marked sent is not delivery proof

Payment status stays honest

Record an invoice or deposit as paid yourself. SayInvoice does not collect or reconcile payments.

Marked paid is not bank verification

Northfield Services

accounts@northfieldservices.co.uk

INVOICE

SI-0042

Billed To

Harbour Property Services

18 Market Street, Worcester

boiler servicing £150.00
landlord checks £45.00
Subtotal£195.00
VAT (20%)£39.00
Total Due £234.00
Less evening admin

Leave gas engineers paperwork at work.

Speak the job while it is fresh. SayInvoice creates a professional gas engineers quote or invoice ready to check and send.

  • Your logo, bank details and payment terms attached.
  • Optional deposit and stage-payment wording you choose.
  • WhatsApp or email message prepared for you.

More than invoices

Paperwork, follow-ups and clean records for your accountant.

Keep receipt photos and reviewed costs together. Check VAT and expected CIS figures. When an invoice is overdue, SayInvoice prepares a polite follow-up for you to review and send.

Turn quotes into invoices

Convert accepted work into a separate invoice draft, then check any final changes.

Keep photos, receipts and costs

Review suggested receipt details, link costs to jobs and choose which job photos appear on customer PDFs.

Record payment status and follow up

Mark work sent or paid yourself. Due dates highlight overdue invoices, with private alerts and editable messages for you to send.

Remember customers and sites

Reuse customer details and keep private access notes away from customer PDFs.

See the month clearly

Review invoices, payments, overdue work and practical business insights.

Prepare the accountant pack

Export an invoice workbook with matching PDFs and confirmed receipt photos for your accountant to review.

What the pack includes

VAT, expected CIS, deposit, payment, confirmed-cost and attention checks. It is prepared for review, not tax filing.

Built for gas engineers

Real gas engineers work, not generic office admin.

Use the same plain language you use on the job. SayInvoice structures it into customer-ready paperwork.

Example voice note

“Invoice for boiler service and landlord gas safety check, certificate provided, total 120 pounds, payment due within 7 days.”

Check the real job

Invoice the work without pretending to certify it.

Speak the service or repair, parts, labour and property details. Note any separate record supplied, then check the invoice before sharing.

Related trade guides
Heating EngineersPlumbersAir Conditioning EngineersAppliance RepairDrainage ContractorsBathroom FittersBrowse all trade guides

The real admin problem

Keep the invoice separate from regulated gas records

  • The service, repair, fitted parts and call-out need commercial wording of their own.
  • A landlord, tenant, agent and property address can all be involved in one job.
  • Certificate references should not be mistaken for the certificate itself.

Speak, check, share

A review flow for this work

  1. 1Capture the payer, property, appliance, work completed, parts and labour.
  2. 2Check that references to safety or service records say they are separate documents.
  3. 3Review the invoice PDF alongside the regulated paperwork before you share it.
✓

You stay in control

Misheard something? Fix it before sharing.

Speak naturally, then review a clean, editable draft. Correct any word or number before you open a sharing option.

Simple pricing

Start with 5 free documents.

No card required. Choose a plan only when you are ready to continue.

Invoice Only

£14.99 / month

For straightforward voice invoicing.

  • Unlimited invoices
  • Remembered customers
  • Photos & Costs
  • Accountant packs
Start with 5 free documents

Most complete

Pro

£18.99 / month

For quotes, invoices and business oversight.

  • Unlimited quotes and invoices
  • Photos & Costs
  • Monthly summaries and business insights
  • Invoice and quote follow-up tools
Start with 5 free documents

Straight answers.

No tech jargon, just how it works for your business.

Does SayInvoice create gas safety certificates?

No. SayInvoice creates quote and invoice PDFs only. You can note that a Gas Safety Record, service record or commissioning document was supplied, but the app does not create, sign or replace gas certificates or registration requirements.

Can I split parts and labour?

Yes. Separate lines make repair invoices clearer.

Can I use this for quotes as well as invoices?

Yes. SayInvoice supports quotes and invoices, so you can quote first and turn accepted work into a final invoice later.

Does SayInvoice send anything before I check it?

No. The app creates a draft first, so you can check the customer, work details, totals, VAT, and payment terms before sending.

Speak the job. Share the PDF. Track what’s owed.

SayInvoice prepares an editable draft for you to check and share yourself. Sent and paid statuses stay your record.

Create your first invoice free

5 documents free · No card required