Hong Kong advances iXBRL for profits tax e-filing
Hong Kong’s Inland Revenue Department (IRD) has taken an important step in the digital transformation of tax administration, with the first phase of mandatory electronic filing of Profits Tax returns now in effect for larger companies. The phased programme starts with in-scope multinational enterprise groups, which must e-file Profits Tax returns and supporting documents in iXBRL format for years of assessment beginning on or after 1 April 2025 – meaning that for most companies they are due around the middle of May. The IRD’s long-term objective is full-scale mandatory e-filing, moving progressively from large businesses to smaller entities.
The programme provides practical support for preparers. IRD has published dedicated taxonomies covering full HKFRS financial statements, private entity and SME reporting, and tax computations, alongside free iXBRL Data Preparation Tools. Updated English and Traditional Chinese taxonomy packages and tools were launched on 1 April 2026.
Preparers may use their own iXBRL-enabled software or IRD’s tools, with validation available before submission. Minimum tagging requirements, mandatory items and guidance are designed to improve data quality while recognising the transition effort. We look forward to hearing about the results — on the face of it it seems to be a strong example of digital reporting infrastructure delivering better accuracy, efficiency and reliability for both taxpayers and tax authorities.
Read details about the program and the taxonomies here.
