What CSC Corptax does

CSC Corptax is a division of Corporation Service Company (CSC), founded in 1974 and operating as a privately held enterprise corporate-tax software vendor headquartered in Buffalo Grove, Illinois (with the parent headquarters in Wilmington, Delaware). The company builds a unified enterprise tax software platform — branded the Corptax Single Solution — that centralizes tax data and workflows for corporate tax departments across compliance, income tax provision, and tax planning. Its portfolio comprises modular products including Provision (supporting GAAP and IFRS), U.S. Domestic Compliance, U.S. International Tax Compliance (Forms 5471, 8858, 8990, 8992, 8993, 1118, plus PTEP, GILTI, FDII, and Foreign Tax Credit tooling), Global Tax Compliance, Global Minimum Tax (Pillar 2) with GIR/QDMTT capability, and Analytics and Planning, with a Tax Transformation Suite and Professional Services (implementation, loan-staffing, GMT Readiness Assessment) layered on top. Underlying technology combines rule-based tax calculation engines with AI-informed automation, predictive analytics for real-time provision forecasting, and a recently introduced Corptax IDP module for intelligent document processing.

The customer base spans 1,000 corporate clients across 100 countries, including 50% of the Fortune 500 and 60% of the Fortune 100, with named logos spanning insurance (Farmers Insurance, New York Life), energy (ConocoPhillips, Kiewit), manufacturing (Sherwin-Williams), retail/pharmacy (Walgreens), financial services (Capital One, Royal Bank of Canada), technology (Microsoft, Canon), and sports (NHL). The commercial model is enterprise subscription licensing on annual billing, sold through direct enterprise field sales rather than channel partners, with pricing undisclosed and quoted per engagement. Recent strategic emphasis has been on Pillar 2 (Global Minimum Tax) compliance — reflected in dedicated GMT modules, schema-aligned OECD GIR reporting, and a 2025 partnership with BDO USA on co-delivered implementations. Long-tenured operational commitments include TSIA Support Staff Excellence certifications held consecutively since 2009 and a 99% reported customer support satisfaction rating, supporting the company's positioning as a high-stickiness regulatory-translation platform for large multinational tax functions.

Name

CSC Corptax

Legal name

Corporation Service Company

Website

https://corptax.com

Company type

Private

Founded year

1974

Operating status

Operating

Headcount range

251–500 employees

Short description

CSC Corptax is an enterprise corporate tax software vendor (division of Corporation Service Company) that provides a unified compliance, provision, and planning platform — including Pillar 2 GMT capability — to 1,000 corporate clients across 100 countries, including half the Fortune 500.

Ownership category

akta.pro rank

Product category

Corporate Tax Software

NAICS

Software Publishers (513210), Accounting, Tax Preparation, Bookkeeping, and Payroll Services (54121)

SIC

Services-Computer Processing & Data Preparation (7374), Services-Computer Programming Services (7371)

akta.pro primary industry

Revenue Systems, E-Filing & Digital Tax Administration (BPAIADAO)

akta.pro secondary industries

Risk, Controls & Governance (GRC) Platforms (FSAFAOAG), Governance, Risk & Compliance (GRC) Platforms (BPAEAPAA)

Keywords

• Corporate tax software
• Tax compliance solutions
• Tax provision software
• Pillar 2 GMT compliance
• Enterprise tax automation

Headquarters

HQ city

Buffalo Grove

HQ country

United States

HQ region

North America

Offices33 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Marketing or Sales, Infrastructure, Operations

Revenue model

1. Enterprise Tax Software Licensing: CSC Corptax provides corporate tax software as an enterprise licensing solution. Companies license the software to manage tax compliance, income tax provision, and reporting in one single system. The platform supports Global Minimum Tax and Corporate Alternative Minimum Tax components that can be licensed together or separately.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

CSC Corptax provides an integrated enterprise tax software platform that centralizes corporate tax data and workflows for income tax provision, U.S. and global tax compliance, Pillar 2/Global Minimum Tax, and analytics/planning. The single-system architecture combines AI-informed automation and analytics to support multinational enterprises across multiple entities and jurisdictions, sold via enterprise subscription licensing with professional services for implementation.

Product overview

CSC Corptax is a unified enterprise tax software platform built for corporate tax departments, offering a single tax system that centralizes tax data and workflows. The portfolio consists of the Corptax Single Solution as the core architecture platform, with integrated modules including Provision (GAAP/IFRS), U.S. Tax Compliance, U.S. International Tax Compliance, Global Tax Compliance, Global Minimum Tax (GMT) for Pillar 2, Analytics and Planning, and Tax Transformation Suite. Supporting services include Professional Services (implementation, consulting, loan-staffing), Customer Support Solutions, and Product Training. The platform combines AI-informed automation and analytics to support compliance, provision, and planning for U.S. and global tax operations across 1,000 corporate clients in 100 countries.

Differentiator

Problem solved

Functional benefit

Brands

• Corptax Single Solution: Best system architecture for the corporate tax life cycle with total transparency, instant data access, and full data governance
• Corptax Provision
• Corptax U.S. Compliance
• Corptax U.S. International and Global Compliance
• Corptax Global Minimum Tax (GMT)
• Corptax Analytics and Planning
• Corptax Professional Services
• CONNECT Conference
• Eye on Pillar 2

Products and services

• Corptax Single Solution Unified enterprise tax platform providing the system architecture for the corporate tax life cycle with total transparency, instant data access, and full data governance. Serves as the underlying platform for all other Corptax modules.
• Corptax Provision Global and domestic income tax provision solution supporting GAAP and IFRS with instant Real-Time Provision (RTP), predictive analytics, and concurrent reviews for multi-entity tax provision calculations.
• U.S. Tax Compliance (Domestic Compliance) Federal and state income tax compliance solution that automates calculations, data dependencies, adjustments, and apportionment, with state and local income tax return support across all U.S. jurisdictions for separate-company and consolidated filing.
• U.S. International Tax Compliance International compliance solution covering U.S. international tax requirements including Forms 5471, 8858, 8990, 8992, 8993, 1118, with tools for PTEP, GILTI, FDII, and Foreign Tax Credit tracking and optimization.
• Global Tax Compliance Comprehensive global tax compliance solution for multinational enterprises covering planning, analytics, and reporting across international jurisdictions outside the U.S.
• Global Minimum Tax (GMT) Total Pillar 2 solution covering the complete tax lifecycle including Top-up Tax calculations, Safe Harbor evaluation, IIR/UTPR analysis, GloBE Information Return (GIR) generation, and QDMTT filings across 60+ jurisdictions.
• Analytics and Planning Tax analytics and planning module enabling performance of analytics within Corptax, data flow to and from BI applications, and information sharing internally and externally for strategic tax planning.
• Tax Transformation Suite Suite of tools supporting tax transformation initiatives through workflow automation and tax data analytics for enterprise tax departments.
• Corptax IDP Intelligent Document Processing (IDP) solution for automating tax document handling within the Corptax platform.
• Corptax Professional Services Implementation support, consulting services, loan-staff services, and GMT Readiness Assessment Package for Corptax deployment and strategic tax planning.
• Customer Support Solutions 24x7 technical and tax law expert support available every day including after hours during busy season, staffed by TSIA-certified support professionals.
• Product Training Training opportunities including in-product videos, webcasts, and CPE classes for Corptax users.

Quantifiable outcome

• 99% customer satisfaction rating
• +2 more outcomes

Named customers11 records

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability5 records

Feature7 records

Partnerships

Two partnerships are on record, tiered core.

• BDO USAcoreImplementation/ SI/ Consulting Partner · 1 October 2025BDO led the implementation of Pillar 2/Global Minimum Tax compliance for FM, leveraging deep Pillar 2 experience and a trusted client relationship to design a compliant process. Corptax worked behind the scenes to guide setup and mapping, share best practices, and outline a roadmap for current and upcoming GMT functionality.
• FMcoreOthersFM is the end-user customer who partnered with BDO and CSC Corptax to implement Pillar 2 compliance. The collaboration transformed a complex compliance workflow into an efficient, automated process allowing FM to own their tax data with accurate results and transparency.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Thomson Reuters (ONESOURCE): Thomson Reuters ONESOURCE is the closest direct competitor to Corptax, offering enterprise corporate tax provision, compliance, international and indirect tax software to large multinationals. It competes head-to-head in Fortune 500 accounts on tax technology and content depth.
• Wolters Kluwer (CCH): Wolters Kluwer's CCH tax software suite competes directly with Corptax in corporate tax compliance, provision and international tax workflows. It pairs tax software with deep tax research and content, similar to how Corptax pairs software with CSC's services.
• Vertex, Inc. Vertex provides indirect tax (sales/use/VAT) compliance software and has expanded into corporate income tax and Pillar 2, competing with Corptax in multinational enterprise tax. It is a direct peer in Pillar 2 and global compliance workflows.
• Longview Solutions (now part of insightsoftware): Longview is an enterprise tax and financial planning/analysis platform competing with Corptax in tax provision, ETR analysis, and analytics for large corporates. Comparable in customer profile (Fortune 500 tax departments) and core functionality.

Emerging players

• Bloomberg Tax: Bloomberg Tax has built a modern enterprise tax research and software platform that overlaps with Corptax's international compliance and analytics workflows. It competes for Fortune 500 tax department budget, particularly around research-driven compliance and Pillar 2.
• Workiva: Workiva provides a connected reporting platform used by enterprise tax departments for tax provision, ETR and ESG/regulatory reporting. It overlaps with Corptax in provision and analytics workflows and is increasingly viewed as an alternative platform for tax and finance reporting.

Broad incumbents

• SAP (S/4HANA Finance for Tax): SAP offers embedded corporate tax capabilities within its S/4HANA finance suite and competes with Corptax by bundling tax into the broader ERP footprint. It is a broad incumbent alternative rather than a specialist.
• Oracle (E-Business Suite / Fusion Tax): Oracle's Fusion Tax and E-Business Suite tax modules compete with Corptax in provision and compliance for large Oracle ERP customers. It is a broad incumbent whose strength is strongest inside existing Oracle ERP accounts.
• Avalara: Avalara is a large tax compliance platform focused primarily on indirect tax, but increasingly overlaps with Corptax in compliance automation and Pillar 2. It is a broader incumbent rather than a direct corporate-tax specialist.

Others

• Deloitte Tax LLP: Big-4 tax advisory firms (Deloitte, PwC, EY, KPMG) co-implement Corptax at large multinational clients and sometimes develop proprietary tax technology that competes with vendor offerings. They are an adjacent/partner-and-competitor category rather than a direct software peer.

Market position

Strengths1 record

Weaknesses1 record

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/corptax

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CSC Corptax