4.Impact of post-filing adjustments
The GloBE Rules require an increase in Covered Taxes for a previous fiscal year as a result of a post-filing adjustment be treated as an increase in Covered Taxes in the current year (i.e. the year in which the post-filing adjustment is made). In contrast, a decrease in Covered Taxes for a previous year due to a post-filing adjustment generally requires a re-computation of the ETR and top-up tax for that previous year. However, if the decrease is immaterial (i.e. less than EUR 1 million) and the taxpayer has made an election, the decrease can be dealt with in the current year. The Commentary explains that this approach is adopted for simplicity reason on one hand and for effective recapture of any avoided top-up tax in previous years on the other hand.
For Hong Kong which does not allow for loss carry-back, post-filing adjustments may arise due to (1) an error in the computation of the CE’s accounting income or taxable income or (2) a subsequent adjustment to the profits tax liability of a given tax year made by the Inland Revenue Department (IRD) (e.g. by issuing an additional assessment) to subject certain income to tax or disallow the deduction of certain expenses. The simplified example below illustrates the impact of a post-filing adjustment resulting from additional profits taxes charged by the IRD subsequently.
Example 2:
- Assuming the Income Inclusion Rule (IIR) becomes effective in Hong Kong from 1 January 2023
- HK Co with a December year end files the 2023/24 profits tax return with an offshore claim on its interest income in August 2024 and the GloBE information return in June 2025
- The IRD issues a tax assessment for 2023/24 based on the tax return filed initially but disallows the offshore claim on interest income after 2 years (i.e. in 2025/26) after certain rounds of enquiries
The table below shows HK Co’s GloBE Rules positions in 2023/24 (i.e. the year to which the post-filing adjustment is related) and 2025/26 (the year in which the post-filing adjustment is made):
GloBE Rules position for year ended 31 December 2023 | GloBE Rules position for year ended 31 December 2025 |
Interest income (offshore) Other income (onshore) Expenditure (30 related to the onshore other income and deductible) | 200 50 (50) | Interest income (onshore) Other income (onshore) Expenditure | 300 100 (150) |
GloBE income (loss) | 200 | GloBE income (loss) | 250 |
Taxable profit (loss): 50 - 30 | 20 | Taxable profit (loss) | 250 |
Profits tax liability for 2023/24: 20 x 16.5% | 3.3 | Profits tax liability for 2025/26: 250 x 16.5% | 41.25 |
Change to Covered Taxes due to post-filing adjustment | 0 | Change to Covered Taxes due to post-filing adjustment (for 2023/24): (200 – 20) x 16.5% | 29.7 |
ETR: 3.3 / 200 | 1.65% | ETR: (41.25 + 29.7) / 250 | 28.4% |
GloBE top-up tax: 200 x (15% - 1.65%) | 26.7 | GloBE top-up tax | 0 |
As shown in the above table, since the increase in Covered Taxes resulting from the post-filing adjustment for 2023/24 (i.e. disallowance of the offshore claim on interest income) has to be included as Covered Taxes for the year 2025 rather than year 2023, HK Co ends up in an undesirable position of paying GloBE top-up tax in year 2023 whereas its ETR for year 2025 is well above 15%.
The same issue will arise if Hong Kong is going to introduce a domestic minimum tax (DMT) regime. That is, a top-up tax of 26.7 will be imposed under the DMT regime (instead of the GloBE Rules) in the year the return is filed and when the IRD subsequently disallows the offshore claim on the interest income, there will be additional profits tax of 29.7, leading to a double taxation in Hong Kong unless the DMT paid will be refunded or can be used to credit against the additional profits tax liability arising from the post-filing adjustment.
Key takeaway: The impact of any post-filing adjustments on a CE will depend on the CE’s ETR in previous as well as future fiscal years. Similarly, as accrued current or deferred tax expenses relating to an uncertain tax position (UTP) need to be excluded from the Covered Taxes amount in the year of accrual and can only be included as Covered Taxes in the year the taxes are actually paid, an undesirable consequence similar to the one in the above example may be resulted for a CE with a UTP. Business groups with uncertain tax issues or issues pending settlement with the IRD should consider the potential impact of such issues on the group’s GloBE Rules positions and evaluate whether any potential adverse impact can be mitigated by an early settlement of the outstanding tax issues with the IRD.