Thomsonreuters

What is onesource

ONESOURCE is a suite of corporate tax and compliance applications from Thomson Reuters designed for large enterprises, multinational corporations, and professional services firms. It combines modules for corporate income tax, indirect tax (sales and use / VAT / GST), transfer pricing, tax data automation, tax provision and accounting (ASC 740 / IAS 12), and statutory reporting into a single, integrated platform. ONESOURCE is positioned for organizations that need centralized control of tax processes, audit-ready records, and integrations with ERP and accounting systems.

The platform is typically offered as modular subscriptions so organizations can license only the components they need—examples include tax provision, direct tax compliance, indirect tax determination and returns, transfer pricing documentation, tax data collection, and content such as global tax research and regulatory updates. Thomson Reuters supplements the software with implementation services, content updates, and support intended to help organizations meet complex, cross-border tax obligations.

ONESOURCE is built to support enterprise controls: audit trails, role-based access, segregation of duties, multi-entity and multi-jurisdiction reporting, and centralized document management. It also includes preconfigured tax rules and country-specific libraries that speed configuration for common tax scenarios.

Onesource features

ONESOURCE groups capabilities into modules and shared services that address recurring tax and compliance tasks. Broad feature areas include:

• Tax Provision and Accounting: Automated ASC 740 / IAS 12 tax provisioning workflows, journal entry generation, tax provision worksheets, reconciliation, and audit-ready documentation.
• Direct Tax Compliance: Workpapers, filing management, return generation, electronic filing support for country-specific formats, and consolidated tax return handling.
• Indirect Tax (VAT/GST/Sales & Use): Tax determination engine, exemption handling, returns preparation, tax rate libraries, and tax calculation integration with point-of-sale and ERP systems.
• Transfer Pricing: Documentation workflows, master/local file generation, benchmarking and analytics support for intercompany pricing documentation.
• Tax Data Management: Data extraction, mapping, and validation tools to collect GL, subledger, and transactional data from ERP systems for tax calculations.
• Content and Knowledge: Country-specific tax rules, statutory forms, rate tables, and regulatory updates maintained by Thomson Reuters tax research teams.
• Workflow & Controls: Role-based access, configurable approval workflows, audit trails, change logs, and segregation of duties controls.
• Reporting & Analytics: Prebuilt and custom reports, dashboards for tax positions, provision rollforwards, tax rate analysis, and audit reports.
• Integrations & Connectors: Prebuilt connectors for major ERP systems (SAP, Oracle, Microsoft Dynamics), data import/export, and APIs for custom integration.

Shared platform services include secure document management, single sign-on (SSO) support, two-factor authentication (2FA) options, encryption for data at rest and in transit, and multi-entity configuration to manage global tax operations from a single tenant.

What does onesource do?

ONESOURCE centralizes tax lifecycle tasks so tax teams can reduce manual work, improve accuracy, and maintain documentation for audits. It automates tax calculations, maps transactional data to tax reporting structures, prepares returns, and produces accounting entries for tax provision and reconciliation. That means fewer spreadsheets, consolidated reporting across entities, and consistent application of tax rules.

The platform also manages indirect tax determination across many jurisdictions using maintained tax rate libraries and exemption logic, which simplifies point-in-time calculations and month-end return preparation. For direct tax and provision, it provides the structure and worksheets needed to compute deferred taxes, current tax expense, and related disclosures required by accounting standards.

Beyond calculations, ONESOURCE houses tax content—statutory forms, rules and country guidance—reducing the need for separate tax research subscriptions. The software’s workflow and audit capabilities (approval routing, audit trails) are built to support internal control frameworks and external audit processes.

Onesource pricing

Onesource offers these pricing plans:

• Enterprise: Custom pricing (quote required) — Full suite licensing, multi-module discounts, enterprise support levels, and implementation services
• Module-based licensing: Custom pricing (quote required) — License individual modules (Tax Provision, Indirect Tax, Direct Compliance, Transfer Pricing) priced per module, per entity, or per transaction volume
• Cloud subscription & managed services: Custom pricing (quote required) — Hosted SaaS subscriptions with optional managed services or outsourcing for filing and return preparation

Pricing for ONESOURCE is generally provided on a quote basis because deployments vary by company size, number of legal entities, required modules, data volumes, and desired service levels. Check ONESOURCE's pricing and licensing options on the Thomson Reuters product site for the most up-to-date details: view ONESOURCE pricing and licensing options (https://www.thomsonreuters.com/en/solutions/onesource.html).

How much is onesource per month

ONESOURCE starts with custom monthly subscription terms because the platform is sold primarily to enterprises with tailored licensing, volume, and service agreements. Monthly billing models are available for some SaaS deployments, but most enterprise agreements are structured as annual subscriptions combined with implementation and support fees.

How much is onesource per year

ONESOURCE is typically sold under annual subscription agreements with custom pricing that reflect module selection, number of legal entities, transaction volumes, and optional professional services such as implementation, configuration, and training. Annual contracts often include software updates, tax content maintenance, and standard support.

How much is onesource in general

ONESOURCE pricing ranges from custom module quotes to enterprise licensing agreements depending on the organization’s needs. Small deployments or single-module subscriptions have lower entry costs than global, multi-module implementations which include extensive integration work, data transformations, and additional professional services. For precise estimates, contact Thomson Reuters sales or request a formal quote through their ONESOURCE contact channels: view ONESOURCE pricing and licensing options (https://www.thomsonreuters.com/en/solutions/onesource.html).

What is onesource used for

ONESOURCE is primarily used to centralize and automate core tax and compliance functions across multinational organizations. Typical uses include preparing corporate income tax returns, compiling tax provision calculations for financial close, calculating transactional indirect taxes, managing transfer pricing documentation, and producing country-specific statutory reports.

Tax teams use ONESOURCE to replace spreadsheet-based processes and to maintain auditable trails for tax positions, estimates, and filing decisions. Finance teams rely on the platform to generate reliable tax journal entries and rollforwards required by accounting standards such as ASC 740 and IAS 12.

Indirect tax teams use ONESOURCE to apply complex VAT/GST rules, determine tax liabilities at the transaction level, and prepare filing returns—especially in businesses with high transaction volumes or many jurisdictions. Tax data specialists use the data management features to extract, validate, and reconcile GL and transactional data from multiple ERPs into tax calculations.

Implementation partners, internal tax operations, and external advisors also use ONESOURCE for managed services: Thomson Reuters or implementation partners can handle ongoing return preparation, filing, and some tax accounting tasks on behalf of the organization.

Pros and cons of onesource

Pros:

• Centralized tax platform that supports multiple tax disciplines (provision, direct, indirect, transfer pricing) in one ecosystem, reducing tool fragmentation.
• Extensive country and tax-rule content maintained by Thomson Reuters tax research teams, which helps keep treatments current across jurisdictions.
• Prebuilt connectors and APIs that facilitate integration with major ERPs (SAP, Oracle, Microsoft) and data warehouses, reducing manual data entry.
• Audit-ready workflows, role-based access, and detailed change logs simplify audits and strengthen internal controls.
• Scalable for enterprises: supports multi-entity consolidation, multi-jurisdictional reporting, and high-volume transaction processing.

Cons:

• Pricing and licensing are custom and typically geared to enterprise budgets; small businesses may find entry costs and implementation overhead high.
• Implementation complexity can be significant for organizations with many legacy systems or nonstandard chart-of-accounts structures; professional services are often required.
• Customization and advanced integrations may extend time-to-value if significant ETL or system middleware is necessary.
• As with any enterprise tax system, users need trained tax and technical resources to manage rules, maintenance, and monthly/quarterly reporting cycles.

Onesource free trial

Thomson Reuters rarely publishes a public free trial for ONESOURCE because it is an enterprise-grade solution that typically requires configuration and data integration before it can be evaluated in a representative way. Instead, Thomson Reuters commonly offers product demonstrations, sandbox environments, proof-of-concept engagements, or time-limited pilot deployments tailored to a prospect’s specific processes and datasets.

If you want to evaluate ONESOURCE, request a demonstration that focuses on the modules relevant to your team (for example, Tax Provision or Indirect Tax) and include a discussion of sample data ingestion and integration scenarios. A pilot or sandbox deployment is often the best way to assess fit because it allows an organization to validate mappings, tax rule application, and end-to-end reporting workflows.

For details about evaluation options and potential pilot programs, contact Thomson Reuters through their official ONESOURCE product pages: ONESOURCE evaluation and demo information (https://www.thomsonreuters.com/en/solutions/onesource.html).

Is onesource free

No, ONESOURCE is not free. It is an enterprise subscription product sold via module licenses and enterprise agreements. Evaluations and demos may be available but production use requires a paid subscription and typically implementation services.

Onesource API

ONESOURCE provides API and connector capabilities designed for enterprise integration scenarios. The platform exposes RESTful endpoints (where applicable) and has prebuilt connectors for major ERP systems such as SAP, Oracle E-Business Suite, Oracle Cloud ERP, and Microsoft Dynamics. APIs and connectors facilitate:

• Data ingestion from GL, subledger, billing, and transactional systems for tax calculations and provisioning
• Export of tax calculation results, journal entries, and filing data back to ERPs or accounting systems
• Automation of tax determination services (real-time or batch) for transactional systems and e-commerce platforms
• Programmatic access to reporting exports, audit logs, and workflow statuses to support internal dashboards and BI tools

For enterprise customers, Thomson Reuters typically provides API documentation, integration guides, and developer support through professional services. Integration approaches include direct API calls, ETL processes, file-based exchange (CSV/XML), middleware (e.g., Dell Boomi, Mulesoft), and native ERP connectors.

To get technical specifications and developer resources, refer to Thomson Reuters’ ONESOURCE integration and API documentation or speak with a technical sales representative: ONESOURCE integration and connector options (https://www.thomsonreuters.com/en/solutions/onesource.html).

10 onesource alternatives

Paid alternatives to onesource

• Avalara — Cloud-based indirect tax automation for sales and use tax, VAT, and GST with real-time tax calculation, exemption certificate management, returns filing, and integrations with e-commerce and ERP systems.
• Vertex — Corporate tax and VAT/GST solutions that provide tax calculation engines, returns and remittance, and specialized modules for consumer-facing businesses and large enterprises.
• Wolters Kluwer CCH — Range of tax and accounting solutions, including corporate compliance, tax research, and automated tax provision tools geared toward both practitioners and corporate tax departments.
• Sovos — Compliance platform focused on tax determination, e-invoicing, and reporting with strong compliance capabilities for highly regulated markets and global e-invoicing requirements.
• TaxJar — Indirect tax automation primarily for e-commerce businesses, offering sales tax calculation, reporting, and filing for marketplaces and online sellers.
• Thomson Reuters ONESOURCE (other module configurations) — Organizations sometimes compare different ONESOURCE module sets or license bundles instead of switching vendors.

Open source alternatives to onesource

• ERPNext — Open source ERP with accounting modules that can be extended for tax reporting; suitable for organizations willing to build tax logic and maintain country-specific rules in-house.
• Odoo (Community) — Open source ERP with accounting and invoicing modules; tax management is possible via community modules and customizations but requires development for complex, multi-jurisdiction tax rules.
• OpenTaxSolver — An open source project focused on individual tax computations that can be informative for building custom tax calculation components, though it’s not a full enterprise tax platform.
• GNUCash — Open source accounting software that can support basic tax reporting and bookkeeping tasks for small organizations but lacks the enterprise tax automation features of ONESOURCE.

Frequently asked questions about Onesource

What is Onesource used for?

ONESOURCE is used for enterprise tax and compliance management across corporate income tax, indirect tax (VAT/GST/sales tax), transfer pricing, and tax provision. Organizations use it to automate tax calculations, consolidate tax reporting, prepare audit-ready documentation, and integrate tax workflows with ERP systems.

Does Onesource offer integrations with SAP and Oracle?

Yes, ONESOURCE provides prebuilt connectors and integration options for SAP and Oracle ERP systems as well as Microsoft Dynamics. Integrations support data extraction for tax calculations, journal entry export, and automation of filing processes through middleware, APIs, or file-based exchanges.

How much does Onesource cost per user or per company?

ONESOURCE pricing is provided by custom quote based on selected modules, number of legal entities, transaction volumes, and required services. Licensing models include module-based subscriptions and enterprise agreements, and Thomson Reuters provides quotes after evaluating scope and integration requirements.

Is there a free trial for Onesource?

No, ONESOURCE does not typically offer a public free trial. Evaluation is usually done through tailored demos, sandbox pilots, or proof-of-concept projects that reflect an organization’s data and processes.

Can Onesource handle global VAT/GST reporting?

Yes, ONESOURCE supports global VAT and GST calculations and return preparation with country-specific rules and maintained tax rate libraries. It is designed to handle multi-jurisdiction indirect tax scenarios for multinational organizations.

Does Onesource support tax provision accounting (ASC 740 / IAS 12)?

Yes, ONESOURCE includes tax provision and accounting capabilities to compute current and deferred tax, produce journal entries, and generate disclosure schedules required under ASC 740 and IAS 12.

Can Onesource be used by small businesses or startups?

ONESOURCE is primarily targeted at mid-market and enterprise organizations, though some single-module or simpler deployments may fit smaller companies with complex tax needs. Smaller organizations often consider cloud-first or lower-cost alternatives when budget and implementation resources are constrained.

How secure is Onesource for storing tax data?

ONESOURCE uses enterprise-grade security controls including encryption in transit and at rest, role-based access controls, and audit logging. Thomson Reuters also provides documentation on compliance and security practices through their corporate security and product pages.

Does Onesource integrate with e-commerce platforms for sales tax calculation?

Yes, ONESOURCE can integrate with e-commerce platforms via APIs or middleware to provide transaction-level tax determination and reporting, though many e-commerce businesses choose specialized indirect tax providers when they have high-volume retail transactions.

What support and training resources are available for Onesource?

Thomson Reuters provides implementation services, training, and customer support for ONESOURCE customers including onboarding, product training, knowledge base materials, and access to tax content updates. Enterprise customers can purchase enhanced support and dedicated account teams.

onesource careers

Thomson Reuters hires technical consultants, tax subject-matter experts, product managers, and software engineers to support the ONESOURCE product line. Roles typically involve experience with tax accounting, enterprise software implementations, ERP integrations (SAP, Oracle), and cloud/SaaS operations. Job listings and career information are available through Thomson Reuters’ corporate careers pages.

onesource affiliate

Thomson Reuters works with implementation partners, system integrators, and channel partners who resell ONESOURCE or provide implementation and managed services. Potential affiliates should contact Thomson Reuters partner programs to understand certification, revenue share, and engagement models.

Where to find onesource reviews

Independent reviews and user feedback can be found on enterprise software review sites, technology forums, and industry analyst reports. For official case studies, customer testimonials, and product briefs, consult Thomson Reuters’ ONESOURCE resource center: ONESOURCE product resources and customer stories (https://www.thomsonreuters.com/en/solutions/onesource.html).