Welcome to the World of Time Basis!

Hello there! Today, we are diving into a topic that often feels like a puzzle: Time Basis Assessment. This is a crucial part of Salaries Tax in Hong Kong. Essentially, we are trying to answer one question: "If a person works in multiple countries, how much of their salary should Hong Kong actually tax?"

Don't worry if this seems a bit technical at first. We will break it down step-by-step using simple rules and real-life scenarios. Think of it as fair play—the Hong Kong government only wants to tax the portion of work that relates to Hong Kong when the job itself is based elsewhere!

Step 1: The Golden Rule – Source of Employment

Before we even talk about "Time Basis," we must determine the Source of Employment. This is the most important step because "Time Basis" only applies to people with Non-Hong Kong Employment.

How do we know if an employment is "Non-Hong Kong"?

The Inland Revenue Department (IRD) looks at three main factors. You can remember them with the mnemonic "M-R-C":

1. M (Management and Control): Where is the company’s central management and control located? (Is the "boss" or the headquarters outside HK?)
2. R (Remuneration): Where is the employee's salary paid? (Is it paid into a bank account outside HK?)
3. C (Contract): Where was the employment contract negotiated and signed? (Was it signed outside HK?)

Quick Review Box:
- Hong Kong Employment: If the source is in HK, usually 100% of your income is taxable (unless you qualify for specific exemptions). Time Basis does NOT apply here.
- Non-Hong Kong Employment: This is where Time Basis saves the day! You only pay tax on the days you spent working in Hong Kong.

Step 2: Understanding the Time Basis Formula

If you have a Non-Hong Kong employment, the IRD uses a simple "day-counting" method to figure out your Assessable Income.

The Formula:
\( \text{Assessable Income} = \text{Total Income} \times \frac{\text{Days spent in Hong Kong}}{\text{Total days in the year (365 or 366)}} \)

Example: Sarah works for a US tech company (Non-HK Employment). Her annual salary is \$1,000,000. During the year, she spent 90 days in Hong Kong for work meetings and the rest of the time in the US.

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Sarah's HK Assessable Income:
\n\( \$1,000,000 \times \frac{90}{365} = \$246,575 \)

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Key Takeaway: With Non-Hong Kong employment, if you aren't in Hong Kong, you aren't paying HK tax on that portion of your income!

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Step 3: How to Count "Days" (The IRD Way)

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Counting days sounds easy, but the IRD has a specific rule: The "Presence" Rule. Any part of a day counts as one full day.

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How it works:
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1. If you arrive in HK on Monday night and leave on Tuesday morning, that counts as 2 days of presence.
\n2. If you are in HK for a 2-hour transit at the airport and don't pass through immigration, it usually doesn't count.
\n3. If you are in HK for a holiday or personal reasons, those days still count as days of presence for the time-basis calculation because you were physically in the territory.

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Did you know? Even if you come to HK just for a Saturday brunch with friends and leave, that counts as a full day in the eyes of the taxman!

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Step 4: The Famous "60-Day Rule"

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This is a "Free Pass" for many business travelers. Under Section 8(1B) of the Inland Revenue Ordinance, an individual is exempt from Salaries Tax if they render all their services outside Hong Kong and their visits to Hong Kong do not exceed 60 days in a year of assessment.

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Important Details:

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- This is an "all-or-nothing" rule. If you stay 61 days, you lose the exemption entirely.
\n- It applies to "visits". If you are a Hong Kong resident with a home here, this rule is much harder to claim.
\n- It doesn't apply to directors (sorry, directors are taxed differently!).

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Common Mistake to Avoid:
\nStudents often think the 60-day rule means you subtract 60 days from your total. No! If you stay 59 days, you pay $0 tax. If you stay 61 days, you pay tax on all 61 days.

Step 5: Comparing the Scenarios

Let's summarize how we decide what is taxable based on the source and the 60-day rule:

Scenario A: Hong Kong Employment
- Rule: Taxable on 100% of income.
- Exception: If you perform all services outside HK (the "60-day" rule applies here too, but it's rare for HK employment).

Scenario B: Non-Hong Kong Employment + Stayed < 60 days
- Rule: Full exemption. You pay \$0 HK Salaries Tax.

Scenario C: Non-Hong Kong Employment + Stayed > 60 days
- Rule: Use Time Basis. Taxed on (Days in HK / 365) x Total Income.

Quick Summary & Final Tips

Key Summary Table

- Source = HK: Full Tax (Time basis usually doesn't apply).
- Source = Non-HK: Apportionment (Only pay for days in HK).
- Under 60 Days: Total Exemption (for visits).

Memory Aid: The "Source Check"

Always ask: "Where is the job rooted?" If it's rooted outside HK, you are on the Time Basis path. If it's rooted inside HK, you are on the Full Tax path.

Final Encouragement: Time basis assessment is just about counting days and checking the "root" of the employment. Master the "M-R-C" tests and the day-counting rule, and you've conquered this chapter! Keep practicing those calculation questions!