Bringing public sector revenue management into a new era of digital governance.

SOLON TAX is our built for purpose commercial-off-the-shelf (COTS) platform for taxpayer and revenue management operations and process automation in complex revenue authority environments.


Modern revenue authorities need to easily and quickly adapt to changes in legislation, provide excellent and efficient taxpayer services, tax payment collection and distribution, dig into data to identify possible fraud and non-compliance, and implement automated risk-based processes to proactively monitor high risk taxpayers and transactions.

SOLON TAX is designed to address these needs. It is the culmination of over 25 years’ experience with multiple large revenue authorities as customers.


The design of SOLON TAX leverages our expertise and experience with large and complex tax and revenue management system implementations. Specifically built for modern revenue authorities, SOLON TAX serves as a unified platform for all taxpayer activities, ensuring accurate and consistent data management across all functions.

SOLON TAX provides features and functions to support all tax authorities core businesses like taxpayer self-service, registration and return processing, refunds, payments, risk, compliance, enforcement, revenue accounting, and analytics.

SOLON TAX is built to support multiple tax types like VAT, Personal Tax and Fees and create a coherent overview of all activities and ensure that revenue authorities have a single source of the truth for all taxpayers across all tax types.

At the same time, SOLON TAX provides the flexibility to only support selected tax types and tax business processes.

With its modular microservices-based design and ‘out-of-the-box’ accelerators, SOLON TAX facilitates a phased, low-risk implementation process, allowing a smooth transition to a unified platform for managing all taxpayer and revenue services. By gradually implementing changes, revenue authorities provide a structured and controlled approach, minimizing the potential for disruptions, controlling costs, and ensuring a smoother transition for users. Some revenue authorities use a hybrid model where some parts of the core process are performed using their existing system. The flexibility of SOLON TAX enables integration with these systems.

SOLON TAX aims to minimize the tax gap by encouraging voluntary compliance through providing easy-to-use-, anytime-, and anywhere access for taxpayers and by reducing fraud. Fraud identification is supported through the provision of automated risk-based processes that proactively monitor high risk taxpayers and transactions and behavioural risk analysis to identify anomalies and trends in large sets of data. The risk analysis is used to build a taxpayer profile and effectively select candidates for further action. Data in SOLON TAX is easily accessible and provides authorities with the ability to store data for any kind of analytics- and AI-purposes.

SOLON TAX provides both synchronous and asynchronous communication to connect with 3rd party systems. SOLON TAX’s open API architecture ensures easy integration with complex legacy systems and offers an extensive range of pre-built APIs for reliable connectivity. Services can be updated, and new services can be implemented and exposed as REST APIs. Asynchronous processes can be used to upload data, download data and for processing data internally.

SOLON TAX complies with complex local and international standards, including the OECD’s data exchange guidelines and the EU’s VAT initiatives (OSS and VIDA).

SOLON TAX is tailored to meet diverse business and legal requirements. SOLON TAX provides multiple tax processes, forms, rules, and pre-defined business entities out-of-the-box and is also built to be highly configurable and extensible, adapting to each jurisdiction’s unique policies. SOLON TAX provides embedded tools for the definition and maintenance of tax processes, business rules, forms and an extensive range of business entities, such as party and party role types, revenue types and revenue periods, financial transaction types and bill types, penalty and interest rules and rates, pay plan types, human task types, etc.

SOLON TAX utilizes a flexible cloud-ready technology stack based on an open-source framework, this reduces dependency on specific products or vendors while potentially lowering costs. SOLON TAX facilitates dynamic scaling to meet growth in volumes and activity peaks. This scalability is achieved through a containerized cluster and a microservices-based architecture. SOLON TAX is an event-based data driven platform, providing real-time data analysis, validations, and automations based on data and events from all relevant systems.

What's in the box?

SOLON TAX Revenue Management


SOLON TAX Revenue Management offers comprehensive support for automated tax processes, including features for taxpayer registrations, returns, assessments, overpayments, payments, audits, recovery and enforcement, case management, planning and task management, contact management, operational reporting, and taxpayer and revenue accounting. Its pre-built business entities, such as forms, processes, rules, party types, tax types, calendars, financial transactions, approvals, risk models, and case types, significantly reduce both implementation effort and risk. The business processes integrate risk analysis with automated workflows, user and taxpayer notification services.

The SOLON TAX Revenue Management Single Taxpayer Overview enhances taxpayer services and support, collection, and organisational efficiency by providing a unified view of the taxpayer across all revenue types.

The SOLON TAX Revenue Management platform offers graphical tools for planning, work management, reporting, process monitoring, contact management, and other performance and service level activities. Additionally, a suite of user-friendly configuration management tools for processes, rules, forms, and business entities enhances visibility and agility, enabling business users to create, maintain, and deploy configuration items independently from the application code.

Would you like to know more?

Reach out to

Kim Clausen Agerskov

Partner, Public sector