Mobile Field Service Invoicing Software That Gets You Paid Faster
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Drowning in a sea of paper invoices and lost billable hours?
Field Promax is the best invoicing software for contractors, designed to make your life easier. Our mobile invoice software lets you create, send, and track invoices right from the field, speeding up payments and boosting your cash flow.
What Is Field Service Invoicing Software?
Field service invoicing software is a tool that automatically generates, sends, and tracks invoices for businesses whose technicians work outside the office. It connects job completion data directly to billing -so when a technician finishes a job, an invoice is created from the work order details, with no re-entry.
For contractors in HVAC, plumbing, electrical, and other trades, this means every labor charge, part, and billable expense gets captured in real time -and the customer receives a professional invoice before the van leaves the driveway.
From Job Dispatch to Paid Invoice in 6 Steps
No paper. No office trips. One tap.
Job Is Dispatched
Dispatcher assigns the job in Field Promax. The technician gets notified on their mobile app with full job details, customer history, and a pre-loaded price book.
See Scheduling & Dispatch →Work Is Completed in the Field
The technician records labor time, parts used, and any expenses directly in the work order on their phone - even offline. No paper forms, no end-of-day memory required.
See Mobile App →Invoice Is Generated On-Site
With one tap, the completed work order converts to a branded, itemized invoice. Custom pricing rules apply automatically - negotiated rates or contract prices are always correct without manual lookup.
Invoice Is Sent from the Field
The technician emails or texts the invoice to the customer before leaving the job site. Customers can view, approve, and pay online the same day.
Payment Is Collected
Field Promax integrates with multiple payment platforms so customers pay via their preferred method. No chasing checks, no waiting for office mail processing.
QuickBooks Syncs Automatically
Completed invoices post to QuickBooks with no double entry. For QuickBooks Online, this happens when the job is closed. For QuickBooks Desktop, sync runs via the Web Connector at preset intervals.
Mobile Invoicing
Creating invoices back at the office after a long day of fieldwork is time-consuming and prone to errors.
As the best invoicing software for contractors, Field Promax allows technicians to generate and send professional invoices for service directly from their mobile devices at the job site.
Request Demo
Mobile Invoicing
Creating invoices back at the office after a long day of fieldwork is time-consuming and prone to errors.
As the best invoicing software for contractors, Field Promax allows technicians to generate and send professional invoices for service directly from their mobile devices at the job site.
Request Demo
QuickBooks Integration
Manually entering invoice data into QuickBooks is repetitive and wastes valuable time.
Field Promax, a leading field service invoicing software, automatically syncs completed job information with QuickBooks, creating invoices without any extra effort.
Request DemoQuickBooks Integration
Manually entering invoice data into QuickBooks is repetitive and wastes valuable time.
Field Promax, a leading field service invoicing software, automatically syncs completed job information with QuickBooks, creating invoices without any extra effort.
Request DemoComprehensive Payment Solutions
Our invoicing and payment system helps you manage the complete financial lifecycle:
Multi-Platform Payment Processing
Field Promax’s invoice payment software integrates with multiple payment platforms, allowing customers to pay invoices easily through their preferred method.
Explore moreCustom Pricing for Invoices
The best invoicing software for contractors, Field Promax, includes a custom pricing module that automatically applies customer-specific rates when creating invoices.
Explore moreExpense and Mileage Tracking
Field Promax, the best invoicing software for contractors, allows technicians to track and include expenses and mileage directly within work orders, ensuring all billable costs are accurately captured in your invoices.
Explore moreAnd Boost Productivity
Your team is the driving force behind your success. Support them with the right tools and watch your business thrive.
How Field Promax Invoicing Works for Your Industry
HVAC Contractors
An HVAC technician finishes a furnace repair with three replacement parts and two hours of labor. Field Promax pulls the parts from the price book, applies any contracted rates for that customer, and sends a branded invoice before the tech loads the van. The customer pays via card on the same visit.
See Field Promax for HVAC →Plumbing Businesses
Emergency calls don’t leave time for office billing. Plumbing techs use Field Promax’s mobile app to invoice on-site for parts and time - and QuickBooks updates automatically when the job is closed, so the bookkeeper sees the revenue the same day.
See Field Promax for Plumbing →Electrical Service Companies
Commercial electrical jobs often involve multiple crew members and phased work. Field Promax tracks labor hours per technician and captures all materials used on the work order - so the invoice reflects actual job costs, not estimates written from memory.
See Field Promax for Electrical →Property Management Maintenance
Property managers handling multiple units need invoices organized by property and tenant. Field Promax ties every work order to a customer record, so invoices are always linked to the right property with full service history attached.
See Field Promax for Property Management →Why Field Service Businesses Choose Field Promax for Invoicing
More Users, Better Value per Technician
Field Promax bundles users by plan - 5 users for $199/month, 12 users for $239/month. The more your team grows, the lower your cost per technician.
Up and Running Within an Hour
Most customers are fully set up within an hour. Technicians are trained on the mobile app in 10 minutes. No technical setup required.
Mobile-First for Your Field Team
Invoice from the job site on iOS or Android. No return to the office before billing. Your techs already have a phone - that’s all they need.
QuickBooks Sync Built In
Completed jobs convert to invoices that post to QuickBooks with no double entry. QuickBooks Online syncs when the job closes. QuickBooks Desktop syncs via Web Connector.
What Our Customers Say
What our customers say.
“Field Promax has changed the way our company does business. We were a paper based company and only got our paperwork from our techs one day a week. Field Promax has given us the capability to invoice our customers quicker, interact with our techs through the app and website seamlessly, and be more efficient with work load and routing jobs. Very very happy with Field Promax!
Tom Lacina
TCorp
“Three years ago, we were a 100% paper-based operation. Field Promax has completely transformed our business. What used to be a logistical nightmare is now a streamlined, tech-driven operation. It has made it possible for us to scale into multiple states - something that was unthinkable before. Compared to other platforms like Salesforce, Field Promax is significantly more affordable without sacrificing functionality or quality.
Tim Yslava
“We have been using Field Promax for a few years now. We are very happy with this program. The features are easy to use and to understand. Customer service is fantastic. I would recommend if someone was considering using this product.
Accounts RWscale
“Field Promax has changed the way our company does business. We were a paper based company and only got our paperwork from our techs one day a week. Field Promax has given us the capability to invoice our customers quicker, interact with our techs through the app and website seamlessly, and be more efficient with work load and routing jobs. Very very happy with Field Promax!
Tom Lacina
TCorp
Frequently Asked Questions
Field service invoicing software automatically generates invoices when technicians complete jobs in the field. It pulls labor, parts, and expense data directly from the work order - removing the need for manual invoice creation back at the office. The result is faster billing, fewer errors, and quicker payment collection.
With Field Promax, technicians open the mobile app on their phone or tablet at the job site. When the work is done, they tap to convert the work order into an invoice. They can review it, add final notes, and email or text it to the customer - all before leaving the site. Works on iOS and Android.
Yes. Field Promax integrates with both QuickBooks Online and QuickBooks Desktop. With QuickBooks Online, invoices generate automatically when a job is closed - no double entry. With QuickBooks Desktop, sync runs via the Web Connector at preset intervals. Customer data, job details, and invoice totals transfer without manual re-entry.
Field Promax integrates with multiple payment platforms, so customers can pay via credit card, debit card, or bank transfer through their preferred method. Customers can pay on-site with the technician or online after receiving the invoice by email or text.
Yes. Field Promax includes a custom pricing module that automatically applies customer-specific rates when generating invoices. Negotiated contract prices or special rates apply automatically - no manual lookup needed.
Technicians add mileage and expenses directly to the work order while in the field. When the invoice is generated, those billable items are already included - no post-job reconciliation needed. This captures billable work that gets lost when invoices are created hours after job completion.
Field Promax offers three plans: Light at $99/month for 1 user, Standard at $199/month for 5 users, and Premium at $239/month for 12 users. The more your team grows, the lower your cost per technician. Full details at fieldpromax.com/pricing.
Key features to evaluate: mobile invoice creation from the field, automatic QuickBooks or accounting sync, custom pricing and price book support, multi-payment method acceptance, expense and mileage tracking, and ability to send invoices via email or text from the job site. For growing teams, also check for recurring jobs and batch invoicing.