Free Invoice Software
Stop Chasing Payments
Build the invoice on-site. Send it. Get paid before you drive off.
Free Invoicing Software
Stop Chasing Payments
Build the invoice on-site. Send it. Get paid before you drive off.
Key Features of Free Invoice Software
Key Features of Free Invoice Software
Make it easier to sell
Ditch the paper
Send a simple, professional invoice your customers can actually read. Our online invoicing also makes it easier to sell service agreements by showing the customer exactly what they’d save. Text or email the invoice on-site and get paid before you leave.
Build invoices in seconds
Find your flat rate tasks and services, then add them to the invoice with one tap. The shopping cart layout is simple enough that any tech can use it on the first job.
Get sales tax right, every time
Look up sales tax rates for any U.S. state right from the app, so the invoice total is correct no matter where the job is.
Take credit cards in the field
Credit card processing built right into your invoicing, so you can collect payment on the spot — safely and securely.
Track every invoice in one place
See which invoices are still in progress and which ones are sold, all from one dashboard.
I’ve handcrafted about 3,500 tasks since I started this back in 1996. The jobs that kill a shop’s margins are never the big ones, they’re the cheap-looking ones nobody bothers to price right.
James Leichter
Flat Rate Plus Online creator
3500+
flat rate tasks
8 FREE
calculators
Flat Rate Plus Online® goes beyond pricing
Flat Rate Plus Online® goes beyond pricing
Smart systems for techs in the field. Easy sharing and follow-up for the office.
QuickBooks Sync
Maintain instant, accurate, and automatic flat-rate pricing updates.
Field Ops
Sales & Marketing
Turn more leads into jobs, stay on top of follow-ups, and keep your reputation strong.
Smart systems for techs in the field. Easy sharing and follow-up for the office.
QuickBooks Sync
Maintain instant, accurate, and automatic flat-rate pricing updates.
Field Ops
Sales & Marketing
Turn more leads into jobs, stay on top of follow-ups, and keep your reputation strong.
Explore solutions for your industry
What is Free Invoice Software?
You finished the job. Get paid faster with online invoicing.
Send the invoice before you leave the job site. Get paid on the spot or let the customer pay online — no more chasing checks.
- Get paid faster — send professional invoices from the field and accept multiple payment options
- Look professional — clear, branded invoices build trust and cut down on billing questions
- Never lose track of a payment — see every unpaid invoice in one dashboard
Ditch the Paper Invoices
Struggling to read a tech’s scrawl? Can’t find the invoice lost in last year’s pile?
Proper invoice software helps you ditch paper invoices and time-consuming double entry.
Core Features of Free Invoicing Software
Customizable invoice design
Add your logo, tech notes, and terms and conditions to make every invoice look like yours.
Boost service agreements
Show customers their missed savings automatically, so service agreements are an easier sell.
User-friendly system
Techs add and remove flat rate tasks in the Shopping Cart, then check out to generate the invoice.
Multiple ways to get paid
Accept cash, check, or credit card and get paid faster.
Full visibility
Keep invoices top of mind. The Invoice and Sale Dashboard tracks what’s sent and what’s paid.
Free Invoicing Software Built for Field Service Techs
Simple, free invoicing made for how field service actually works.
- No-fuss invoicing — turn the estimate into an invoice, send it, and get paid before you leave the job.
- Never miss an invoice — the Invoice and Sale Dashboard keeps every invoice in view, so you always know what’s paid and who needs a nudge.
- QuickBooks sync done right — invoices and payments built to sync with QBO, not bolted on. Everything matches QuickBooks Online down to the penny. Easy to set up as a paid add-on.
Get Started with Flat Rate Plus Online
Register for free and start using free invoice software without the stacks of paper.
- Add Terms & Conditions
- Credit card processing*
- Customizable invoice
- Generate invoices
- Invoice dashboard
- Process payments
- Ready-made flat rate price books
- Send invoice by email, print, or text*
- Service agreements
- Shopping cart invoice system
- Technician notes
- QuickBooks synchronization*
- Warranty terms
*Paid or Premium+ feature
In This Article
Explore the full toolbox
Tools built for the day-to-day work of running a field service business.
Flat Rate Pricing
Build better quotes, stay on top of your parts, and give customers clear options that help close more jobs.
Scheduling
Keep the day on track by booking appointments, organizing jobs, and keeping the full schedule in view.
Inventory
Track stock, flag what needs reordering before you run out, and update prices automatically to stop the mid-job chaos.
Leads
Turn more leads into jobs. Keep customers in the loop with targeted marketing you can send now or schedule for later.
Explore the full toolbox
Tools built for the day-to-day work of running a field service business.
Flat Rate Pricing
Build better quotes, stay on top of your parts, and give customers clear options that help close more jobs.
Scheduling
Keep the day on track by booking appointments, organizing jobs, and keeping the full schedule in view.
Inventory
Track stock, flag what needs reordering before you run out, and update prices automatically to stop the mid-job chaos.
Leads
Turn more leads into jobs. Keep customers in the loop with targeted marketing you can send now or schedule for later.
Join for free.
No card, no catch.
The Forever Free™ plan lets you build your own custom flat rate price books, access up to 5,000 flat rate task items, and use built-in price calculators and bookkeeping reports. Start today for free with the #1 flat rate pricing software for HVAC, plumbing, and electrical contractors, since 1996.
Join for free.
No card, no catch.
The Forever Free™ plan lets you build your own custom flat rate price books, access up to 5,000 flat rate task items, and use built-in price calculators and bookkeeping reports. Start today for free with the #1 flat rate pricing software for HVAC, plumbing, and electrical contractors, since 1996.
Join for free.
No card, no catch.
The Forever Free™ plan lets you build your own custom flat rate price books, access up to 5,000 flat rate task items, and use built-in price calculators and bookkeeping reports. Start today for free with the #1 flat rate pricing software for HVAC, plumbing, and electrical contractors, since 1996.