Hong Kong Company Tax: 2026-27 Budget Relief and E-Filing Mandate Take Effect

Hong Kong's corporate tax landscape is undergoing a major shift in mid-2026. Three interconnected developments—the enactment of 2026-27 Budget tax measures, the launch of mandatory electronic filing for profits tax, and the operational rollout of the global minimum tax regime—are reshaping compliance obligations for businesses operating in the city. Here is what company owners and tax professionals need to know.

Budget Tax Relief Enacted

On 13 May 2026, the Legislative Council passed the Inland Revenue (Amendment) (Tax Concessions, Concessionary Deductions and Allowances) Bill 2026, with the amendments gazetted on 22 May 2026. The law delivers a one-off 100% tax reduction for the year of assessment 2025/26, covering profits tax, salaries tax, and tax under personal assessment, capped at HK$3,000 per case. Approximately 171,000 businesses are expected to benefit. The reduction is applied automatically in final assessments; no separate application is required.

Starting from the year of assessment 2026/27, personal allowances have been increased. The basic allowance rose from HK$132,000 to HK$145,000, the married person's allowance from HK$264,000 to HK$290,000, and the child allowance from HK$130,000 to HK$140,000 per child. These adjustments reduce the effective tax burden for entrepreneurs and employees alike.

Mandatory E-Filing and iXBRL Now Live

The first phase of mandatory electronic filing of profits tax returns took effect on 1 April 2026. Under the Inland Revenue (Amendment) (Minimum Tax for Multinational Enterprise Groups) Ordinance 2025, in-scope multinational enterprise (MNE) groups—those with consolidated revenue of EUR 750 million or more—must file profits tax returns electronically through the Business Tax Portal (BTP). Supporting financial statements and tax computations must be submitted in iXBRL format. Paper submissions are no longer accepted for these entities. The IRD has also updated its Taxonomy Package and iXBRL Data Preparation Tools on 1 April 2026 to facilitate compliance.

Pillar Two Portal Opens for Top-Up Tax Notifications

On 19 January 2026, the Inland Revenue Department launched the first phase of its Pillar Two Portal. In-scope MNE groups can now submit top-up tax notifications electronically for fiscal years beginning on or after 1 January 2025. This implements Hong Kong's commitment under the OECD's BEPS 2.0 framework to impose a 15% global minimum tax on large MNEs, alongside the domestic Hong Kong Minimum Top-up Tax (HKMTT). The portal is accessed via the BTP, and entities must register for MNE group codes before filing.

What This Means for Businesses

For ordinary SMEs, the immediate impact is the automatic tax relief and higher personal allowances. For larger or internationally connected firms, the new e-filing and Pillar Two obligations represent a significant compliance step-up. Directors should ensure BTP accounts are active, iXBRL workflows are in place, and group structuring is reviewed before the next filing deadline.

Hong Kong continues to offer a competitive tax environment—profits tax remains at 8.25% on the first HK$2 million and 16.5% thereafter—but the administrative bar is rising. Staying ahead of these changes is no longer optional.