IRIS Accountancy Suite Support Downloads

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.NET 4.8 and MSVC 2022 notification

From April 2024 IRIS Accountancy Suite requires .NET 4.8 and MSVC 2022.
Microsoft .NET 4.8 can be downloaded from here.
MSVC 2022 can be download from here.

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New Installations

For brand new installations, please ensure to download and install SQL Server before starting the IRIS installation.
The SQL Server 2019 Express download can be obtained from here.

Note: SQL Express – is available from Microsoft for free and is only recommended for use for up to 6 users. Full System Requirements can be found here.

To download and learn more about the limitations of SQL Express against the SQL Server Standard version, visit the Microsoft website here.
Detailed instructions for installing SQL (in the example) can be found here and instructions for installing IRIS can be found here.

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Terminal Server/LPO Downloads

Both Terminal Server(s) LPO and the main IRIS installer must continue to be maintained at the same version and build number at upgrade time; the version and build number can be seen in any Help/About dialog.
To download LPO Installations please click here.

IRIS Installations

Please download the required release depending on which version is installed. To find the version installed, open IRIS and go to Help | About. The version will be shown on the right-hand side.

Full Install denotes a Full release that can be used for fresh installations and upgrades.  All Full installs need to be upgraded in succession, it is not possible to skip any updates.

Upgrade Only denotes a Service Pack, used to upgrade existing installations.

We recommend that you review the Known Issues before installing the latest release of IRIS Accountancy Suite.

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Winter service pack release v25.4.12 – coming soon

This optional release includes updates to Company Secretarial paper forms to reflect Companies House fee increases effective the 1st February 2026 and, Accounts Production updates.

Important Installation Guidance
If you require any of these new features before 1st February 2026, please ensure that you and your team have completed all your tax return processing before installing this release. Installing the update prior to finishing your current processing may affect your workflow, so we strongly recommend following this guidance to avoid any disruption.

Note: Please read the release notes before installing this update.

Note: All features delivered in this service pack will be available in the Spring release v26.1.0, due w/c 30th March 2026.

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Main releases

Software versions prior to v22.1 are available here.

IRIS Anti – Money Laundering 

IRIS Docs

For further details and support on upgrading IRIS Docs, visit the IRIS Help Centre.
For the latest System Requirements, click here.

IRIS VAT Filer