Case Study: Mazars LLP achieves HMRC iXBRL compliance with IRIS Software Group's OpeniXBRL

Mazars LLP chooses IRIS OpeniXBRL to meet mandatory Corporation Tax regulations

Mazars, an international audit, advisory, accounting and tax firm, needed to convert client accounts into iXBRL to comply with HMRC’s mandatory Corporation Tax filing rules—particularly for clients whose accounts were produced in Microsoft Word and Excel rather than Mazars’ standard accounts package. To address this gap, Mazars selected IRIS Software Group’s IRIS OpeniXBRL (powered by CoreFiling).

IRIS Software Group delivered IRIS OpeniXBRL as a SaaS solution featuring an intelligent learning engine, built‑in HMRC validation checks and an exportable review spreadsheet for offline signoff. The deployment simplified and automated tagging, sped final approvals, ensured exported iXBRL files validated at the HMRC Gateway, and reduced costs via scalable licensing—enabling Mazars to meet the mandate reliably and more efficiently.

Mazars

Benjamin Levy

Senior Manager