183 天規則計算機

各管轄區的 183 天規則

多數國家以 183 天規則判定稅務居留，但細節各不相同。以下是快速參考：

• 183 天，曆年制：多數國家，德國、西班牙、法國、義大利、墨西哥、新加坡、日本、葡萄牙（12 個月滾動）。
• 184 天 + 住所：紐約、紐澤西、麻薩諸塞、康乃狄克、賓夕法尼亞。
• UK SRT（Statutory Residence Test）：在英國課稅年度（4 月 6 日至 4 月 5 日）內，與聯繫掛鉤的天數測試。
• 澳洲：在澳洲所得年度（7 月 1 日至 6 月 30 日）內的 183 天。
• 加拿大：183 天視同居民規則，與居住聯繫測試並行。
• 阿聯：持居留簽證並有住所時為 90 天，一般情形為 183 天。

如果專門處理 Schengen 90/180，請使用專用的 Schengen 計算機。若是 IRS 的 Substantial Presence Test，請使用 SPT 計算機。

The threshold is not always 183

Reaching for a 183-day calculator and then applying 183 to a jurisdiction that uses a different number is a common and expensive mistake. Set the threshold field to your own rule:

• 180 days: Thailand, on the calendar year.
• 182 days: India, on a financial year running 1 April to 31 March, and Malaysia on the calendar year. India also has a second route at 60 days for people with substantial presence over the preceding four years.
• 184 days: New York, and in practice any rule written as "more than 183 days", which includes the statutory-residency tests in New Jersey, Massachusetts, Connecticut and Pennsylvania, each of which also requires a permanent place of abode.
• 200 days: Oregon and Hawaii.
• 270 days: Idaho, alongside a home kept in the state for the whole year.
• About 214 days: Alabama and Oklahoma, whose statutes are written as seven months rather than as a number of days, so the day figure is an approximation and the shorter reading is the safe one.
• No fixed threshold: California, where more than nine months creates a rebuttable presumption of residence while less than nine months creates no presumption the other way, and Illinois, which turns on domicile and purpose rather than on a day count.
• Fewer than 90 days: Cyprus can treat you as resident on 60 days when its other conditions are met in the same year, and the UAE has a 90-day route for specified people with a permanent place of residence and a job or business there.

「一天」怎麼算

多數管轄區把曆日內的任何停留都算成完整一天。有些要求午夜在境內（UK SRT）。有些對過境日設有排除。閱讀完整指南： 183 天規則詳解。

The conventions that decide whether a given date lands in your total:

• Any part of a day: New York and several other US states count any presence at all, including a connection between two flights, as a full day. It is the most punitive convention and the one to assume when you do not know which applies.
• Presence at the end of the day: the UK statutory residence test generally counts a day only if you are in the UK at midnight, with limited exceptions for transit and for exceptional circumstances beyond your control, plus a separate deeming rule for people with several UK ties.
• Both ends of the trip: the Schengen 90/180 rule counts the day you enter and the day you leave in full. That is an immigration limit rather than a tax test, and it runs on a rolling 180-day window instead of a year.
• Days that are excluded: the US substantial presence test disregards, among others, days of exempt individuals, days you are in transit between two points outside the United States and are in the country for less than 24 hours, and days you could not leave because of a medical condition that arose while you were there.
• A window that moves: some rules count within any rolling twelve-month period rather than a fixed year, so the window shifts by one day every day and there is no 1 January reset to plan around.

Common mistakes and edge cases

Almost every day-count dispute comes down to one of these:

• Counting nights instead of days. A Friday to Sunday trip is three days under most rules, not two. Repeat that across twenty trips and your count is twenty days light.
• Assuming the year starts on 1 January. The UK tax year runs 6 April to 5 April, Australia's income year 1 July to 30 June, and India's financial year 1 April to 31 March. Set the window before you enter a single trip, or every total is measured over the wrong period.
• Treating the threshold as a safe harbour. Staying under the number is not the same as being non-resident. Domicile, a home kept available to you, where your family lives and where your economic interests sit can each make you resident on far fewer days, and several systems have a deliberate low-day route.
• Forgetting that residence usually covers the whole year. Crossing on 26 December generally makes you resident from 1 January, not from 26 December. Split-year and part-year reliefs exist, UK split-year treatment and the US dual-status year among them, but they are specific reliefs with their own conditions rather than the default outcome.
• Mixing the immigration clock with the tax clock. A 90/180 visitor limit and a 183-day tax test are different rules with different windows and different consequences. Being comfortably inside the 90 days says nothing about your tax position, and a stay that is perfectly legal on immigration can still create a residence question.
• Counting from memory at the end of the year. Tax authorities expect contemporaneous evidence: boarding passes, hotel folios, card transactions. Where the burden of proof sits with you, an undocumented day tends to be counted against you, and reconstructing a year afterwards is usually the moment people discover they were already over.
• Watching only one country. Days out of one place are days in another. Cutting to 150 days somewhere while spending 200 days somewhere else swaps one residence question for a worse one.

If more than one jurisdiction is in play, count them together in the multi-country day counter.

Setting the calculator to your rule

The calculator counts every distinct calendar day inside the window you set, counting entry and exit dates in full and de-duplicating days shared by overlapping trips. To match your rule:

• If your rule says "183 days or more", enter 183. The threshold is reported as met on the day the count reaches it, which is what that wording means.
• If your rule says "more than 183 days", enter 184, the first day that actually makes you resident. The same logic turns any "more than N" rule into a threshold of N plus one.
• Set the window to the jurisdiction's own year, not the calendar year, unless the two are the same.
• Add one row per continuous stay, entry date and exit date. Days covered by two overlapping rows are counted once.
• Enter trips you have not taken yet. The projected crossing date is calculated from everything in the list, so scheduled travel shows you the date you would cross before you commit to it.

Where a rule excludes certain days, transit days under the US substantial presence test for example, leave those days out of the trips you enter rather than expecting the calculator to know about them. It counts calendar days, it does not apply any one jurisdiction's exclusions.