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Sage Corporation Tax

Free#15 of 25 in Corporate Tax Software

Online UK corporation tax preparation and HMRC filing for accountants.

6.6/10★★★☆☆Editor score

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At a glance

• Editor score
  6.6 / 10
• Pricing
  Free plan
• Best for
  Budget-conscious UK tax practices
• Free plan
  Yes
• Paid from
  None
• Electronic filing
  Yes
• Founded
  1981 · Newcastle upon Tyne, UK
• Facts checked
  20 Sep 2026

• Where it wins

  • Free access with unlimited clients
  • CT600, supplementary pages, iXBRL and validation
  • Group relief and accounting-system integrations

• Where it doesn't

  • Feature depth is narrower than leading enterprise suites
  • Browser-based deployment only
  • Access is provided through Sage for Accountants client management

Our verdict on Sage Corporation Tax

Sage Corporation Tax is browser-based software for accountants and accounting practices preparing UK company tax returns. It covers CT600 returns, supplementary pages, tax computations, iXBRL files, validation, attachments, reports and HMRC submission workflows. The product is suited to practices that want a focused corporation tax tool rather than a broader enterprise tax suite, particularly where free access and accounting-system connectivity are important.

Pricing is the clearest differentiator. Sage Corporation Tax is presented as a free complementary feature of Sage for Accountants, with access for all clients currently free. The published plan includes unlimited clients, CT600 and supplementary-page preparation, and an HMRC submission workflow. Its workflow also supports computation reports, validation before submission, document attachments and HMRC submission files, helping practices prepare returns and check them before filing without a separate Corporation Tax subscription.

The product fits most naturally into the Sage ecosystem. It integrates with Sage Practice Solution, Sage Final Accounts and Sage Accounting, while also supporting other bookkeeping solutions. Accounting data can flow into corporation tax returns, which may reduce repeated entry for connected practices. It supports group relief claims and surrenders, adding useful capability for companies handled within group structures. However, its verified feature depth is narrower than leading enterprise suites, and deployment is web-based. Choose Sage Corporation Tax for cost-conscious UK practices needing core return preparation, validation and filing workflows; larger teams seeking broader enterprise tax functionality should consider a more expansive alternative.

Sage Corporation Tax pricing

All 1 Sage Corporation Tax plans and prices →

Sage Corporation Tax fact sheet

Sage Corporation Tax integrations

Sage Corporation Tax lists 4 integrations on its own site.

• Sage Practice Solution
• Sage Final Accounts
• Sage Accounting
• other bookkeeping solutions

Alternatives to Sage Corporation Tax

• Tax SeriesA broad compliance and provision platform for multinational U.S. tax teams.—
• ONESOURCE Income TaxA broad corporate tax system for complex federal, state, local, and international compliance.—
• GoSystem Tax RSA cloud platform for firms managing complex, high-volume corporate filings.—

See all Sage Corporation Tax alternatives →

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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

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