Hong Kong · Administrative guidance
Hong Kong opens Pillar Two return filing and electronic assessments
On 26 October 2026, Hong Kong’s Inland Revenue Department launched top-up tax return filing through the Pillar Two Portal. Part 4AA entities of in-scope multinational groups can use the functions for fiscal years beginning on or after 1 January 2025.
- Official document:
- IRD26October2026 portal announcement; Inland Revenue Ordinance Part4AA and Schedule63 sections9 and11
- Development date:
- 2026-10-26
The launch provides an electronic route under the existing Inland Revenue Ordinance, rather than introducing a new minimum tax. Schedule 63 section 11(3)(a) requires an electronic record sent through the Commissioner’s designated system. IRD identifies BIR82 as the top-up tax return and describes an ordinary process that does not accept paper filing; the Commissioner’s statutory exceptional powers remain separate.[2][3]
Filing and assessed entities need the relevant Business Tax Portal accounts. Authorised signatories use an organisational e-Cert with AEOI functions. Electronic assessment notices and any payment vouchers go to those accounts, so designated paying entities also need access. IRD says the account arrangements apply to joint-venture groups too.[2]
The portal’s availability is not a deadline extension. Schedule 63 section 9 retains the earlier of the statutory 15-month period—or 18 months for the group’s transition year—and any date specified in a section 4 notice. Groups should confirm the filing entity, transition history and account permissions before relying on a calendar date.[3]
Official sources
- [1] IRD announcement: Pillar Two return-filing functions launched26October2026
Hong Kong Inland Revenue Department · Document date: 2026-10-26
Dated26October entry,lines158–160: launch,Part4AA,in-scopegroups,fiscalyearsstarting1January2025 andelectronicassessment notices.
- [2] Global minimum tax and Hong Kong minimum top-up tax: compliance and Pillar Two Portal
Hong Kong Inland Revenue Department · Document date: 2026-10-26
Launch157; existingframework186/202; BIR82electronicreturn272–276; portal/accounts/e-Cert/assessment/paymentvouchers349–356. UndatedFAQ/BIR82notes separatelyread as background, not assigned an inventedpublicationdate.
- [3] Inland Revenue(Amendment)(Minimum Tax for Multinational Enterprise Groups) Ordinance2025,Ordinance21/2025
Hong Kong Special Administrative Region Gazette · Document date: 2025-06-06
Schedule63sections3,8–11,printedA2777,A2797–A2805 read. Section9 earlier-of deadline;11(3)(a) designatedelectronicrecord/system;11(7)/(8) exceptionalacceptance discretion. LawfulHTTP200 originaldownload; SHA2564bc982a2313582051162ba7c0202aa4911bb5fc6f10f9f1428b797f59694fd3d. No complete lateramendment-chain claim.