Question 1

What is the 183-day tax rule?

Accepted Answer

The 183-day rule is a common threshold used by many countries to determine tax residency. If you spend 183 days or more in a country during a tax year, you may be considered a tax resident and liable to pay taxes there. However, each country applies this rule differently — some use calendar years, some use rolling windows, and some have additional qualitative tests.

Question 2

How is the Schengen 90/180 day rule calculated?

Accepted Answer

The Schengen rule allows stays of up to 90 days within any rolling 180-day period. For any given date, count backwards 180 days and total the days spent in any Schengen country. This must not exceed 90 days. The window moves forward daily, so your available days change constantly.

Question 3

What is the US Substantial Presence Test?

Accepted Answer

The US SPT is a weighted formula across 3 years: current year days × 1, plus prior year days × 1/3, plus two years ago × 1/6. If this total is 183 or more AND you were present at least 31 days in the current year, you may be considered a US tax resident.

Question 4

How does the UK Statutory Residence Test work?

Accepted Answer

The UK SRT is a three-tier test. First, automatic overseas tests check if you're conclusively non-resident. Then, automatic UK tests check if you're conclusively resident. If neither applies, the sufficient ties test counts your connections to the UK (family, accommodation, work, etc.) and compares your days present against a threshold that depends on how many ties you have.

Question 5

Does the Schengen 90-day counter reset when you leave?

Accepted Answer

No. Leaving the Schengen Area does not reset your days. Days only drop off your count when they fall outside the 180-day lookback window. If you used all 90 days consecutively, you'd need to wait roughly 90 days outside the zone before your full allowance is restored.

Question 6

Do transit days count toward the Schengen 90-day limit?

Accepted Answer

Any day you are physically present in a Schengen country counts as a full day, including arrival and departure days. Airport layovers count only if you pass through immigration. Airside transit without clearing immigration does not count.

Question 7

What happens if you overstay Schengen by even one day?

Accepted Answer

Fines range from approximately €500 to over €3,000 depending on the country. You may also receive a re-entry ban of 1 to 5 years across all 29 Schengen countries and a flag in the Schengen Information System (SIS). With the EES system, overstays are now detected digitally.

Question 8

Which countries does this calculator support?

Accepted Answer

Currently: all 29 Schengen Area countries (90/180 rule), United States (Substantial Presence Test), United Kingdom (Statutory Residence Test), UAE (183-day rule), Portugal, Spain, Thailand (180-day rule), and Singapore. More countries are being added.