MYER
Developed and maintained scalable Warehouse Resource Management software.
Billing and Invoicing Software Development Company
Eliminate Manual Invoicing and Accelerate Payments with Custom Billing Software
Anglicare
Mobile app with ARCHIBUS integration kiosk stand software development.
Visuals2Go
Cross-platform mobile & tablet app for disabled people.
NobleOak
A complex financial model with end-to-end and AI customised user journey.
SydneyWater
Custom software integration between SAP ERP and InEight (project controls software).
Hillsong
Mobile donations form with payment gateway integration.
Metro Finance
Designed and developed a web application to manage & streamline shifts.
Site360
SaaS platform – Geofenced visitor management & fully customisable workflow forms.
Acorn Rentals
Custom accident replacement vehicle system that automates the entire rental process.
TaxToday
Streamlining instant refunds with highly secure cloud native application.
Custom Billing and Invoice Software Development Services for Modern Australian Businesses
Manual invoicing, disconnected payment systems, and delayed reconciliation can disrupt cash flow and create compliance risks for your business. Without an integrated and intelligent custom billing solution, errors, missed payments, and reporting gaps can become costly and time-consuming.
As a Sydney-based billing and invoice software development company, Designpluz helps businesses simplify invoicing, manage recurring payments, and improve revenue tracking through tailored digital platforms. We create secure and scalable invoicing systems for eCommerce, logistics, medical, fintech, insurance and accounting industries that automate financial workflow while complying with the requirements of Australian tax and invoicing legislation. The result of an automated billing system is improved financial visibility, faster payment cycles, and reduced administrative costs.
Case Studies
We pride ourselves on the work we deliver and the outcomes we achieve for our clients everyday.
Our commitment to client satisfaction is evident through our genuine 5-star
google reviews
The Designpluz team has allowed us to accelerate the time to market for our platform, translating to money in the bank.
David Philips
Biode
I’ve recently worked with the Designpluz team to develop our site, they have taken a complex offline model and built this into our website.
Sara Gill
NobleOak
I was looking for a design team that could build me a new website and solidify our brand in the market. If I were building a critical website in future, this would be my go-to team.
David Gleig
Bedbug Wholesale
Thx for helping us with our website design and development for our new venture. You made it really easy for us to consider the options available and delivered a great website which presents our services and capability succinctly and professionally to our target clients.
Manish Goklaney
Verveo
The team went above and beyond to launch earlier than expected and handled every challenge with patience and care. They were always responsive, easy to communicate with, and proactive in finding solutions.
Florencia Nicogossian
Topaz Furniture
Working with a dedicated project manager who was our single point of contact made communication seamless and efficient, which allowed us to go live on time and on budget
Mark Camilleri
Bremick
CRC have had a great experience with Designpluz on the development and implementation of our new website. They were thorough in their work making sure our specifications were met with accessibility in mind, and they provided a wonderful contemporary look.
Gwen Rogers
Community Restorative Center
Designpluz is an amazing company to work with! Everyone in their team is lovely to work and collaborate with. They always action task efficiently to make beautiful end results.
Amarni Story
New Age Veneers
Working with Designpluz was a great experience to build our Strathfield Plaza Website. Response time was commendable and overall result was great. Thanks to Mia and the Team!!
Matthew Woo
Strathfield Plaza
An experienced team, a bunch of great people, and simply amazing work. Designpluz was very patient with us as we chopped and changed our project
George Khoury
Knomis
Transparency is key in any partnership, and Designpluz excels in this aspect. They're upfront about their processes, timelines, and costs, which instills trust and confidence in their services.
Trinh Bui
Newington Lane
Priya and Mia have assisted us with our website updates and have been so professional, listening to what we wanted and providing us with updates throughout the process. ...they are so skilled at what they do and excellent at communicating with us on our level!
Joanne Baldwin
KU Legal
Priya and the team were fantastic to work with. They took the time to understand our brief, and deliver amazing results with high attention to detail.
Tommy Lim
SF Capital
The team at Designpluz are fantastic - quick responses; excellent work and just so easy to deal with particularly for website support. They are my go to for any website work.
Anthony Gray
MEAUST
Their answers to questions and general communication was very good which made the whole process a little easier.
Rob Archibald
Emjay Products
They are approachable, responsive, and have consistently taken the time to understand our marketing needs, accommodating all our requests with professionalism and efficiency. Looking forward to continued growth with Designpluz.
Jocelyn Szot
Nover
Our Numbers Tell Our Story
Our commitment to quality and client success, by the numbers.
18+ Years
Delivering Digital Solutions for Australian Businesses
45+ Specialists
Software Engineers, Architects, Web Developers, UI/UX Designers & Analysts
110+ Reviews
Verified Google Reviews from Australian Clients
100%
Australian Owned
Sydney-Based Leadership & Governance
ISO 9001 & 27001
Certification Program Currently Underway
1,000+ Projects
Successfully Delivered Across Multiple Industries
50K+ Users Daily
Across Australia and New Zealand, on platforms We Design and Support
$40M+ Annually
Processed Through Mission-Critical Financial Platforms
Our Billing Software Development Services
Custom Billing Software Development
Our billing software development company designs and builds custom billing systems engineered around your revenue model, operational workflows, and compliance requirements. We develop secure invoice engines that support complex pricing structures, billing cycles, customer account management, and configurable billing rules.
Multi-Currency & Multi-Location Billing
We build global billing software that supports multi-currency and multi-location billing functions for businesses operating across states and international markets. These solutions support automated currency conversions and configurable pricing by region and location-specific tax rules, including GST and international VAT requirements.
Billing System Integration
Our software developers integrate custom billing software with ERP platforms, CRM systems, accounting tools such as Xero, MYOB, POS, and inventory management systems. Using secure APIs, middleware, and webhook frameworks, we enable reliable data synchronisation and streamline billing workflows across connected business applications.
Automated Billing & Invoicing Software
We develop custom billing and invoicing software that automates invoice generation, scheduled billing, payment reminders, credit notes, and payment reconciliation. Our solutions reduce manual administration, improve billing accuracy, and simplify payment tracking, helping businesses manage invoicing processes more efficiently.
Payment Gateway Integration
We integrate leading gateways, like Stripe, PayPal, and Australian payment providers into subscription billing software and automated invoicing systems using secure APIs and tokenisation frameworks. Our payment API integration services ensure encrypted data transmission and PCI-DSS compliance.
Subscription & Recurring Billing Software
We develop custom subscription and recurring billing software that automates billing cycles, payment collection, renewals, plan upgrades, downgrades, and cancellations. Our solutions integrate with payment gateways and business systems, helping businesses manage subscriptions, track recurring revenue, and streamline billing operations.
Billing Software Migration & Modernisation
We migrate outdated billing systems and financial data to modern, cloud-based platforms while preserving essential records and workflows. Our billing software modernisation services improve system performance, scalability, and integration capabilities, helping businesses streamline operations and support evolving billing requirements.
Tax, GST & Compliance Management
Our billing software development services design billing systems with built-in tax logic for accurate GST calculation and apt reporting for regulatory compliance across Australian jurisdictions. We automate tax reporting and audit records while enforcing secure access controls.
Benefits of Billing Software Development
Automated & Error-Free Billing
Automation reduces manual data entry, increases the accuracy of invoicing, and establishes consistent invoicing processes, allowing businesses to further concentrate their efforts on their core operations while providing accurate financial reporting.
Flexible Pricing Models
Custom billing solutions allow businesses to create pricing structures based on their individual requirements, such as subscription, usage-based, and recurring billing systems, without having to make complex manual adjustments to the pricing strategy.
Faster Payments & Cash Flow
Organisations can enhance cash flow visibility and reduce delays in their collection efforts by using automated payment processing and streamlined accounts receivable processes.
Better Customer Experience
Digital invoicing solutions provide clear invoice details, automate customer notifications, and offer multiple convenient payment options, resulting in greater transparency and increased customer confidence throughout the payment process.
The core technologies powering our
software solutions.
Building future-proof bespoke software tailored to specific business needs requires the right tools and technologies.
Why Choose Designpluz?
End-to-End Delivery & Support
At Designpluz, we provide end-to-end billing and invoice software development services from planning to ongoing optimisation, ensuring clients’ automated invoicing systems remain reliable, scalable, and capable of growing with their business.
Experienced Software Developers
By combining technical knowledge with a business-centric approach, our software developers create billing and invoicing software customised to meet your business requirements.
Clear Communication With an Agile Approach
Using an agile delivery method enables transparent collaboration, regular updates, and flexible development cycles, so our clients stay fully involved throughout the project and the software is delivered on time.
Security & Regulatory Compliance
As an experienced billing and invoice software development company in Australia, we build automated invoicing systems developed with robust security controls, encrypted payment processing, and compliance-driven architecture. This ensures the protection of sensitive financial information in accordance with Australian Regulations.
Meet your expert team
Priya Songappan
Founder / Creative Head
Leads strategy, UI/UX, and the digital marketing team with 20 years of experience. Priya has worked with businesses of all sizes across diverse industries to drive sustainable business growth through design, strategy, and execution. She is deeply involved in projects from start to finish, as this is where her passion lies.
Jag Kandasamy
Director - Software, AI & Data
Jag has over 20 years of experience in architecture and delivery of enterprise software, large scale websites, eCommerce platforms and ERP integrations. He specialises in secure, scalable cloud architecture on Azure and AWS, ensuring reliable delivery and high-performance solutions from strategy through to deployment and support.
Shaun Cooper
Technical Project Manager
Experienced project manager from a technical background with great communication & client management skills. Shaun has a transparent approach towards projects and has a great eye for detail, resulting in perfection. Approaches projects in a proven, methodical manner, ensuring timely delivery and accurate budget management.
Subanki Chandrasekaran
Technical Business Analyst
Subanki is a Technical Business Analyst with over 15 years of experience helping organisations deliver successful digital solutions. She enjoys turning complex business challenges into clear, practical requirements and works closely with clients, designers, and developers to deliver solutions that are intuitive, scalable, and aligned with business goals.
Murugesan Thangavel
Head of Technology and Delivery
Leading the delivery of enterprise software, web, mobile, and cloud solutions, Murugesan brings over 15 years of industry experience. He brings a wealth of knowledge in Microsoft technologies, Azure, AWS, microservices, and enterprise integrations, enabling companies to modernise their operations with secure, scalable, and high-performing digital solutions.
Veerakumar Krishnasamy
Senior Software Tester
Veerakumar has 7+ years of software testing experience and is well-versed in software automation, manual testing, API testing, database testing, and CI/CD integration. He has extensive experience in Selenium, Playwright, Java and C# and contributes to achieving reliable enterprise software releases quickly and at top quality.
Muthukumar Mathivanan
Senior Frontend Developer (Angular)
Having developed responsive web applications for over 9 years across healthcare, digital wellness, and skilled labour management, he has established strong expertise in Angular development. He has a keen interest in frontend architecture, user experience, and performance, which aids in providing high-quality digital solutions and engaging user experiences.
Our Billing Software Development Process
Step 1
Understand & Define
The development process starts with a review of current business processes, billing needs, and pricing models, which then establishes a clear roadmap to effectively and efficiently create a customised invoicing and financial management system.
Step 2
Plan & Architect
We plan and design a solution that provides a scalable architecture, securely integrates with existing payment APIs, and offers flexibility in all software design and development processes to allow for ongoing growth and seamless integration with current business systems.
Step 3
Design & Develop
Using the latest technologies, we design software focused on an intuitive user experience and secure architecture, enabling an efficient automated billing system with accurate invoicing and reliable performance across all devices and environments.
Step 4
Testing
Comprehensive functional, performance, and security testing validates that the new billing system is fully operational and complies with Australian financial standards.
Step 5
Launch
Structured deployment minimises disruption to existing operations, allowing the organisation to transition to the new billing software efficiently while maintaining continuity across all financial workflows.
Step 6
Continuous Support & Maintenance
We provide ongoing updates, monitoring, and enhancements to help billing software remain secure, scalable, and aligned with evolving business requirements and technological advancements.
Transform Your Business Operations with AI
Artificial Intelligence
We help businesses utilise the full potential of AI by integrating intelligent capabilities into billing and invoice software, cloud platforms, IoT devices, business reporting, and enterprise systems. Our AI-powered solutions improve efficiency, support better decisions, and drive business growth.
Machine Learning
Designpluz develops machine learning solutions that enable billing and invoice applications to analyse data patterns, improving performance and providing more accurate predictions based on real-world data.
Predictive Analytics
Our team helps you implement predictive analytics solutions into your billing and invoice software that transform historical and real-time data into actionable insights to support proactive decision-making and strategic planning.
Agentic AI
Designpluz implements Agentic AI in your business that is capable of analysing the objectives and adapting dynamic workflows that reduce manual oversight across billing and invoice processes.
AI Consulting
At Designpluz, we help you adopt AI through strategic consulting, AI architecture planning, model selection, training methodologies, cost optimisation, governance frameworks, and implementation roadmaps that are aligned with your business objectives and measurable outcomes.
Generative AI Solutions
We help organisations improve productivity and accelerate digital innovation through generative AI solutions, delivering content creation, knowledge management and personalised user experience.
AI Chatbot Development
Our team creates AI chatbots to enhance customer engagement and lead generation, and internal knowledge assistants to provide instant access to business information and increase productivity and operational efficiency.
Natural Language Processing (NLP)
Designpluz provides NLP-powered solutions that enable applications to understand human language, enhance search functionality, automate document processing, and improve user interaction.
Large Language Model (LLM) Integration
We integrate LLMs into business systems to enable intelligent interactions, automate workflows, streamline access to knowledge, and improve operational efficiency.
Frequently Asked Questions
What features can be included in retail billing software?
You might expect features such as invoice management, POS billing integration, automated invoice generation, payment processing, tax calculation and real-time reporting capabilities to support the efficient operation of retail finance.
Can you customise billing software to match our pricing model?
Yes, custom billing software can support a wide range of pricing models subscription, recurring billing, or usage-based pricing tailored to your company’s workflow.
Is the billing software secure and compliant with industry standards?
Yes. We implement robust security controls, encrypted payment processing, and compliance-focused architecture in every billing system we build. All systems comply with Australian regulatory obligations, including ATO reporting requirements and PCI-DSS standards for payment security.
How much does custom billing software development cost?
The costs associated with custom billing software development differ according to the features required, the number of integrations and their overall scalability, since custom softwares are developed to specifically meet company requirements.
For which industries do you build billing software?
Billing software can be built for retail, SaaS applications, healthcare payments, education and other billing-related services.
