IRIS Business Tax – AiB

IRIS Business Tax reliably handles your corporation tax requirements.

Learn More About IRIS Business Tax for corporate finance departments

Learn more about IRIS Business Tax for corporate finance departments

You can be confident that IRIS Business Tax will reliably handle your corporation tax requirements and enable accountants in business (AiB) to complete important tax tasks with ease online at the touch of a button.

Our tax software for in-house accountants can be integrated with the IRIS Accountancy Suite for accounts, company administration and practice management, offering maximum efficiencies and no need for data to be re-keyed.
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Why you’ll love IRIS Business Tax software

A great feature for finance departments is iXBRL compliance, with all computations automatically generated with no user intervention.

Saves significant time when used in conjunction with IRIS Accounts Production, thanks to minimised data entry and ensuring consistency between your tax and accounts work.

You can eliminate manual intervention in calculating depreciation, lease, hire purchase liabilities and finance charges.
  • Requires almost no data entry – wholly or partially disallowed accounts are flagged within the database and automatically treated correctly.
  • Provides quick asset creation by importing from csv file, amend and update assets using the on-screen browser.
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iXBRL compliant computations are automatically generated with no user intervention.

Handles group relief and the allocation between companies.

Comprehensive capital allowance calculations.

Fast completion of returns for non-resident limited companies liable for UK tax via dedicated module.

Key Features


iXBRL compliant, providing you peace of mind in knowing all submissions made meet HMRC requirements. You get fully automated iXBRL tagging for greater productivity and automated apportionment for extended period computations.


No time-consuming manual tax calculations are required as Business Tax automatically carries out all tax calculations using the data already entered. No manual intervention is required in producing a compliant iXBRL Tax Computation. No separate tools or software are required to handle the split of values between multiple trades, as these are all dealt with in Business Tax. With IRIS you can import a trial balance from any system, Sage, Oracle, SAP or any other ERP system.

Fully integrated

Compliance work is easy and efficient thanks to integration with IRIS Accounts Production, IRIS Personal Tax, IRIS Trust Tax and the IRIS Dividend Service. This allows the data to be shared seamlessly removing the need to rekey any data, saving time and reducing the risk of error.

Quick and easy

Easy navigation of the product and quick access to the right data entry field is enabled through Interactive CT600s which allows the CT600 to be edited directly from the onscreen preview.


  • How do I find support for this software?

    We have a dedicated support section on this website. We also have live chat and a dedicated support telephone number: Support contact numbers.

  • Is this software compliant?

    Assurance and compliance are the primary services of any firm. We understand that you rely on software solutions to get it right, every time – no compromise. Speak to us and find out why IRIS are the leaders in compliant software; call 0344 844 9644.

  • How do I buy this software?

    Speak to us today about how you can get started with IRIS. Call 0344 844 9644 to discuss your requirements; we’ll help you get started.