Hong Kong Tax Residency: The 180/300-Day Cumulative Trap
Hong Kong tax residency turns on a 60-day visit rule plus a 180-day or 300-day-over-two-years treaty day count. Here's how to track all three correctly.
Hong Kong has no single 183-day residency switch. For treaty purposes you are generally a Hong Kong resident if you stay more than 180 days in one year of assessment, or more than 300 days across two consecutive years. Separately, salaries tax uses a 60-day visit exemption and a related 60/183-day split for treaty relief. The 300-day cumulative count is the rule expats miss most, because it adds up across two tax years instead of one.
Start with the territorial principle
Hong Kong taxes on a territorial, not residence, basis. Salaries tax applies to income from employment, an office, or a pension where the source is in Hong Kong, broadly, where the services are rendered. There is no general worldwide-income tax, no capital gains tax, no dividend tax, and no estate duty. Because of this, the most important question for many people is not 'am I resident?' but 'is my employment income sourced here, and how many days did I spend rendering services in Hong Kong?'
Hong Kong's tax year, the 'year of assessment', runs 1 April to 31 March, not the calendar year. Day counts that span a calendar boundary still sit inside one year of assessment, and vice versa. Track against the right window.
The 60-day visit rule for salaries tax
If your employment is sourced outside Hong Kong but you visit and render some services here, your Hong Kong-source income can be fully exempt under the '60-day rule.' Income from services rendered during visits to Hong Kong is not taxed if your total visits do not exceed 60 days in the year of assessment.
- It only applies to 'visits.' If Hong Kong is your base, you live and work here, you are not 'visiting,' and the 60-day exemption does not apply at all.
- The midnight rule does not apply here. For the 60-day count, the Inland Revenue Department (IRD) generally counts any part of a day of presence as a day. A morning flight in and an evening flight out can each count.
- Cross 60 days and you lose the whole exemption, not just the portion over 60. You then fall back on the time-apportionment basis for the days actually worked in Hong Kong.
Because partial days count for the 60-day rule, frequent short business trips to Hong Kong add up fast. Three trips a month of two or three days each can breach 60 days before you notice. This is the single most common way people lose the exemption.
The 180-day / 300-day cumulative residency test
'Resident' in the day-count sense matters mainly for claiming benefits under one of Hong Kong's comprehensive double taxation agreements (CDTAs), and for the treaty tie-breaker if another jurisdiction also claims you. Under the standard CDTA definition, an individual is a Hong Kong resident if they ordinarily reside here, or if they meet a presence test:
| Test | Threshold | Window |
|---|---|---|
| Single-year stay | More than 180 days | One year of assessment |
| Two-year cumulative | More than 300 days | Two consecutive years of assessment |
| Ordinarily resident | No fixed day count | Settled, habitual presence with a home |
The 300-day-over-two-years test is the trap. You can stay, say, 170 days in one year of assessment and 140 the next, under 180 each year, but 310 cumulatively, and still qualify as a Hong Kong resident for treaty purposes. People who watch only the single-year 180 figure miss this entirely. The two-year window must be consecutive years of assessment.
Midnight rule vs. any-part-of-a-day
This is where Hong Kong day-counting gets genuinely confusing, because two different counting conventions live side by side:
- The 60-day visit rule generally counts any part of a day of physical presence as a day, closer to a 'touched the ground' standard.
- The 180/300-day residency and the 60/183-day employment apportionment tests are commonly applied on a presence basis where a day you are physically here counts, but the IRD's practice and treaty commentary lean toward counting days of presence rather than only nights.
Compare this with the UK, where the Statutory Residence Test counts days you are present at midnight, or the US Substantial Presence Test, which counts any day you are physically present. Because Hong Kong leans toward counting presence rather than only midnights, the safe approach is to log every day you set foot here and check against the relevant threshold. See our overview of day-counting variations by country for why these conventions matter.
The 60/183-day employment apportionment
For employees of a non-Hong Kong employer rendering services here, treaty relief and time-apportionment often turn on a 183-day count. Broadly, employment income for services performed in Hong Kong may stay exempt under a CDTA if you are present here for not more than 183 days in any 12-month period, your remuneration is paid by (or on behalf of) a non-resident employer, and the cost is not borne by a Hong Kong permanent establishment. Cross 183 days and the days worked in Hong Kong generally become taxable.
Three different numbers, 60, 180/300, and 183, apply to three different questions: the visit exemption, treaty residency, and the dependent-services treaty relief. Decide which question you are answering before you count, then track that specific window.
Common Hong Kong day-count mistakes
- Counting against the calendar year. Hong Kong's year of assessment ends 31 March. A December–February stretch sits inside one assessment year; an April reset starts a fresh count.
- Treating the 300-day rule as 150 per year. It is a single cumulative figure over two consecutive years, weighted however your travel actually falls.
- Assuming partial days don't count. For the 60-day visit rule they generally do, short trips accumulate quickly.
- Forgetting layovers. A transit through Hong Kong International (HKG) without clearing immigration usually does not count, but the moment you clear immigration it can. See layovers and partial days.
When two jurisdictions both claim you
Many Hong Kong residents also touch mainland China, Singapore, the UK, or the US. If two places both treat you as resident, the relevant treaty's tie-breaker decides, looking at permanent home, then center of vital interests, then habitual abode, then nationality. Your day counts in both jurisdictions are the foundation of that argument. If China is in the picture, read our guide to the China 183-day and six-year rule, which can pull worldwide income into the mainland net. For the mechanics of the tie-breaker itself, see tie-breaker.
Track all three Hong Kong thresholds at once
Tax Days tracks your Hong Kong days against the 60-day visit rule, the 180-day single-year and 300-day two-year residency tests, and the 183-day employment apportionment, all on Hong Kong's 1 April–31 March year of assessment. Log a trip and the app shows where each count stands, so the cumulative two-year figure never sneaks up on you. You can also run quick what-ifs with the 183-day calculator.
Frequently asked questions
What is the 300-day rule in Hong Kong?
For treaty (double taxation agreement) purposes, an individual can be treated as a Hong Kong resident if they are present for more than 300 days across two consecutive years of assessment, even if they stay under 180 days in each single year. It is a cumulative figure, not 150 days per year.
How many days can you stay in Hong Kong without paying tax?
If your employment is sourced outside Hong Kong and you are only visiting, income for services rendered during visits is exempt as long as your visits do not exceed 60 days in the year of assessment. Cross 60 days and the exemption is lost entirely, not just the excess.
Does Hong Kong use a midnight rule for counting days?
Not for the 60-day visit rule, any part of a day of presence generally counts. The residency and treaty tests lean toward counting days of physical presence rather than only nights, so the safest approach is to log every day you are in Hong Kong.
When does Hong Kong's tax year start?
Hong Kong's year of assessment runs from 1 April to 31 March, not the calendar year. All day-count thresholds, 60, 180/300, and 183, are measured against this window, which is a frequent source of miscounting for new arrivals.
Does Hong Kong tax foreign income?
Generally no. Hong Kong uses a territorial system and taxes income with a Hong Kong source. There is no general worldwide-income tax, no capital gains tax, and no tax on dividends. The key question is usually whether your employment income is sourced in Hong Kong and how many days you worked here.
Is the 183-day rule the same as the 180-day rule in Hong Kong?
No. The 180-day (and 300-day over two years) figure relates to treaty residency. The 183-day figure relates to the dependent-services relief under a treaty for employees of a non-Hong Kong employer. They answer different questions and should be tracked separately.
Sources & further reading
Every rule on this page is drawn from primary sources. Verify the current law before making a residency decision.