Hong Kong Time Apportionment of Employment Income for Salaries Tax Filing

Hong Kong Time Apportionment of Income for Salaries Tax

An employee who works partly outside Hong Kong pays salaries tax only on the portion of income attributable to services rendered in Hong Kong. The Inland Revenue Department (IRD) uses a time apportionment of income to isolate that portion. The calculation divides assessable income based on working days spent in Hong Kong against total working days. Employers and employees must understand how the hong kong time apportionment formula works, what records the IRD expects, and how the calculation interacts with the 60-day rule.

When Does Time Apportionment Apply

Time apportionment applies when an employee’s duties are performed partly in Hong Kong and partly outside. Hong Kong salaries tax follows the territorial source principle: income arising in or derived from Hong Kong from an office, employment or pension is chargeable. Where an employee physically works across multiple jurisdictions, the IRD accepts a days-based formula to isolate the Hong Kong portion.

The formula:

Number of working days in Hong Kong ÷ Total working days × Assessable income (excluding non-recurring items such as bonuses unless similarly prorated).

The IRD does not prescribe a specific form for the calculation. Taxpayers include the computation in their tax return or supporting schedules. Expect to provide supporting documents, such as travel records, calendars, flight itineraries and employment contracts demonstrating the place of work.

Time Apportionment Hong Kong Salaries Tax

The time apportionment formula for hong kong salaries tax divides working days in Hong Kong by total working days. The result is applied to gross income from the employment, excluding any clearly offshore source items such as commission earned from sales made entirely outside the jurisdiction.

A working day is any day the employee physically rendered services in Hong Kong, regardless of duration. Days spent on annual leave, sick leave or public holidays are generally not counted as working days unless the leave was taken in Hong Kong and the employee would otherwise have worked. Weekend days are not counted unless the employee actually worked. The IRD’s practice notes advise that a day of presence in Hong Kong for work counts as a full day, even if the employee left after a few hours.

Submit the calculation with Form BIR60, the individual tax return. Where the employee has already been taxed through the employer’s return (Form BIR56A with Forms IR56B), the time apportionment is reflected in the employee’s own return for the year of assessment.

Time Apportionment of Income Hong Kong

The time apportionment of income hong kong basis applies to salaries tax, not profits tax. It is one of several methods the IRD uses to assess income when the source is partly in Hong Kong. The IRD’s Departmental Interpretation and Practice Note 21 (DIPN 21) addresses the locality of profits for profits tax, but the time apportionment for salaries tax is derived from case law rather than a specific DIPN publication.

The formula is the IRD’s accepted benchmark. A taxpayer seeking to depart from it must provide clear evidence that the days-based approach overstates or understates the Hong Kong component. An employer or employee who wishes to challenge the apportionment may present an alternative method, such as a value-based allocation reflecting where decisions were made. The IRD generally expects a days-based calculation unless the alternative is demonstrably fairer.

Hong Kong Employment Tax Time Apportionment

The hong kong employment tax time apportionment calculation requires careful record-keeping throughout the year of assessment. Employers report employment details through the annual employer’s return (Form BIR56A and Forms IR56B) and through event-driven notifications: Form IR56E (new employee), Form IR56F (employee about to cease employment), and Form IR56G (employee about to leave Hong Kong). Where an employee has performed duties partly outside Hong Kong, the employer should note this on the relevant forms or in accompanying correspondence.

The employee ultimately reports the time-apportioned income on Form BIR60, accompanied by a supporting schedule showing the working-day calculation. The IRD may request travel records, employment contracts and calendars to verify the days claimed.

Interaction with the 60-Day Rule

The 60-day rule is a separate provision. It provides that an employee who spends 60 days or fewer in Hong Kong during a year of assessment is not subject to salaries tax on that employment income, regardless of where the duties are performed. This is a complete exemption, not a time apportionment.

The time apportionment formula is only relevant once the 60-day threshold is crossed. If an employee is present in Hong Kong for more than 60 days but performs a material amount of work outside, the time apportionment calculation applies. The two rules operate side by side: one determines whether tax is payable at all, the other determines how much is payable when it is.

Reporting Through Form BIR60

Employees file Form BIR60 as their individual tax return. The form asks for total income from employment. The taxpayer claims an offshore reduction where duties were performed outside Hong Kong. The reduction is calculated using the time apportionment formula and supported by a separate schedule attached to the return.

Employers do not file the individual return. Their obligation is to submit the employer’s return on Form BIR56A together with Forms IR56B for each employee. Where an employee has performed duties partly outside Hong Kong, the employer may record the amount of income attributable to Hong Kong duties if known. The final position is determined by the employee’s own return.

Provisional Tax and Time Apportionment

Provisional tax for the following year of assessment is based on the assessable income of the preceding year. If that income was time-apportioned, the provisional tax is calculated on the same apportioned amount. An employee whose offshore duties increase or decrease in the following year may apply for a holdover of provisional tax on the grounds that the assessable income will be less than the prior year. The holdover application must be made before the due date for payment of provisional tax. The IRD requires supporting evidence of the changed circumstances.

Employer Obligations

Employers must notify the IRD of new employees via Form IR56E within three months of commencement. When an employee ceases employment, Form IR56F must be filed at least one month before the cessation date. If the employee intends to leave Hong Kong, Form IR56G must be filed at least one month before departure. These forms are separate from the annual employer’s return and carry their own deadlines.

Where an employer knows that an employee’s duties are partly outside Hong Kong, the employer should not assume that time apportionment is automatic. The IRD may query the classification. Retain supporting documentation, including employment contracts specifying the location of duties, travel records, and any correspondence with the employee about work locations.

Documentation Required

The IRD expects taxpayers who claim time apportionment to maintain contemporaneous records. Acceptable documentation includes:

• A daily calendar or diary showing work locations
• Flight itineraries and boarding passes
• Hotel receipts or accommodation records
• Employment contracts stating the principal place of work
• Correspondence or memos directing the employee to work outside Hong Kong

Without such records, the IRD may tax the full amount as Hong Kong-sourced income. The burden of proof lies with the taxpayer.

Summary of Key Points

• Time apportionment divides working days in Hong Kong by total working days.
• The formula is applied to assessable income from employment.
• The 60-day rule provides a complete exemption; time apportionment applies only when that threshold is exceeded.
• Employees report the calculation on Form BIR60.
• Employers file Form BIR56A and Forms IR56B and event-driven forms IR56E, IR56F, and IR56G.
• Contemporaneous records of travel and work locations are essential.