ONESOURCE
Vertex
Sovos
Bloomberg Tax Provision
Longview Tax
What is CSC Corptax?
CSC Corptax is an enterprise corporate tax platform supporting compliance, provision, planning, analytics, and reporting. CSC acquired Corptax's parent MLM Information Services in 2011; the product remains sold under the Corptax name.
CSC Corptax is a centralized corporate tax system for compliance, income-tax provision, planning, analytics, and reporting. Tax teams bring entity, trial-balance, ownership, adjustment, and other tax data into one governed environment, then apply configurable rules, calculations, workflows, and filing processes. The platform supports federal, state, local, international, and global tax work, including U.S. Forms 1120, 5471, and 8858 and OECD Pillar 2 outputs such as the GIR and QDMTT. It is designed for enterprise tax operations rather than simple return preparation.
The product covers domestic and international compliance, provision under GAAP and IFRS, global minimum tax, entity management, data collection, document management, data exchange, task automation, analytics, and planning. Connectors support Microsoft Excel, Alteryx, Power BI, Power Automate, and custom applications through a Web Services API. That breadth suits complex tax departments, but user feedback also points to a learning curve and implementation complexity. One Capterra reviewer described implementation as costly and requiring Deloitte assistance, while another found navigation tricky.
Large and multinational corporate tax departments are the clearest buyers. CSC says Corptax supports 1,000 corporate clients in 100 countries, including 50% of the Fortune 500 and 60% of the Fortune 100. Pricing is quote-based, with no public starting price or self-serve trial. Buyers should scope modules, entities, integrations, deployment, implementation, and services together. G2 lists the product at 4.0/5 from 19 reviews, while Capterra lists 4.5/5 from four reviews.
Key features
Tax compliance
Automates calculations, adjustments, apportionment, forms, and filing workflows across federal, state, local, and international jurisdictions.
Tax provision
Supports domestic and global provision under GAAP and IFRS, with reporting, predictive analytics, and concurrent review workflows.
Global minimum tax
Calculates top-up taxes and safe harbors and supports GIR and local Pillar 2 filings, including QDMTT.
Tax planning analytics
Provides dashboards, scenario analysis, visualization, and planning tools for evaluating tax positions and business decisions.
Data automation
Imports and exports entity, ledger, adjustment, and other tax data through Data Exchange Manager, bots, and governed workflows.
Connected workflows
Connects Corptax with Excel, Alteryx, Power BI, Power Automate, and custom applications through connectors and a Web Services API.
Tax data governance
Centralizes tax and entity data with permissions, audit trails, structured dependencies, document storage, and hosted deployment options.
CSC Corptax pricing
CSC does not publish Corptax subscription prices, package prices, or a public free plan. Capterra lists the starting price as not provided by the vendor, and G2 lists no entry-level pricing. Enterprise implementation and configuration should be scoped with the subscription.
| Plan | Price | What's included |
|---|---|---|
| Enterprise | Custom | Scope is quoted and may include compliance, provision, planning, analytics, global minimum tax, integrations, hosting, and professional services |
Free trial: No public self-serve free trial is listed; request a demonstration and quote.
Pros & cons
Pros
- Covers compliance, provision, planning, analytics, and Pillar 2 in one system.
- Supports U.S. federal, state, and local work alongside international and global tax workflows.
- Offers connections to Excel, Alteryx, Power BI, Power Automate, and custom systems.
- Provides named enterprise references including Chevron, Farmers Insurance, and ConocoPhillips.
Cons
- Pricing is not public and requires a sales-led enterprise evaluation.
- Implementation can be costly and may require specialist consulting support.
- Reviewers describe a learning curve and occasional navigation difficulty.
- The platform is aimed at complex corporate teams rather than small businesses seeking simple tax filing.
Who is CSC Corptax best for?
- Large corporate tax departments managing federal, state, and international filings
- Teams consolidating provision and compliance on one governed data model
- Multinational companies preparing for OECD Pillar 2 reporting
- Tax leaders that need API and analytics connections to enterprise systems
Coverage
Integrations
Notable customers
Frequently asked questions
How much does CSC Corptax cost?
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CSC does not publish a starting price, package prices, or a free plan. Capterra lists the starting price as not provided by the vendor, and G2 lists no entry-level pricing, so buyers need a custom quote covering the required scope.
How does CSC Corptax work, and how long does implementation take?
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Corptax centralizes tax data and applies configurable rules, calculations, workflows, and filing outputs across provision, compliance, planning, and analytics. The vendor does not publish a standard implementation timeline; Capterra reviews describe implementation as costly and complex.
How does CSC Corptax compare with ONESOURCE?
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Both target enterprise tax departments and support broad corporate tax operations. Corptax emphasizes one system spanning compliance, provision, planning, analytics, and global minimum tax, while ONESOURCE is a major enterprise alternative; a Capterra reviewer described Corptax as better than OneSource but also cited costly implementation.
What integrations does CSC Corptax support?
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Official Corptax materials list connectors for Microsoft Excel, Alteryx, Power BI, and Power Automate, plus a Web Services API and Data Exchange Manager. These support spreadsheet workflows, repeatable data preparation, dashboards, workflow automation, and custom transfers.
Who is CSC Corptax for?
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It is built for enterprise tax departments managing multiple entities and jurisdictions, especially multinational companies with provision, compliance, planning, and Pillar 2 requirements. CSC says the platform supports 1,000 corporate clients in 100 countries.
Is CSC Corptax secure and accurate?
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Corptax offers hosted deployment options, encryption of data at rest, audit trails, security controls, and governed data access. Its automation provides validation and traceability, but tax teams remain responsible for configuring rules, reviewing outputs, and meeting filing obligations.
Sources
Facts and pricing verified on October 19, 2026. Vendors change pricing often, so confirm with CSC Corptax before buying. How we research
