Calculators
183-Day Calculator: Tax Residence Days by Country
183-day calculator: log trips by country and count days in a calendar year, any 12 months or the UK tax year, plus days left before 183.
Answer
Portugal: 168 days in this period, 15 left before the 183-day threshold.
- Most days
- Portugal: 168
- Days left in Portugal
- 15
- Threshold date in Portugal
- 30 Jul 2026 if your latest trip continues
- Portugal168
- Spain21
- PortugalDays in window: 168Days left: 1530 Jul 2026 if your latest trip continues
- SpainDays in window: 21Days left: 162Not reached in this window
Arrival and departure dates both count as days in the country. A date you enter for two countries, such as a transit day, counts for each of them; trips to the same country that overlap count each date once.
Countries count differently: Colombia counts entry and exit days towards 183 days in any 365-day period, Portugal and Serbia test 12-month periods, and the UK uses its tax year with HMRC’s rules for which days count. For a “more than 183 days” rule, such as Spain’s calendar-year test, set the threshold to 184.
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This counts days against the threshold you choose. Each country sets its own tax year, residence tests and rules for counting arrival and departure days, and home, family and work ties can decide residence too.
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Decision framework
This 183-day calculator counts the days you spend in each country from a trip log, for a calendar year, any 12 months ending on a date or the UK tax year, and shows the days left before 183 and the date you would reach it.
Enter each trip as a country with an arrival and a departure date, then choose the counting window and the threshold. Arrival and departure dates both count as days in the country, so a transit day entered for two countries counts for each of them. The table sorts countries by days in the window, shows the days left before the threshold and gives the date it is reached, either by the trips you logged or if your latest trip there continues without a break. Countries count in their own way: Colombia counts entry and exit days towards 183 days in any 365-day period, and Spain tests more than 183 days in a calendar year, so set 184 for Spain. For a quick total without dates, switch to “Just count days”.
Example: Portugal and Spain in 2026
Portugal from 10 January to 30 April, Spain from 30 April to 20 May and Portugal again from 20 May to 15 July, counted for calendar year 2026: Portugal has 111 + 57 = 168 days and Spain 21, because 30 April and 20 May count for both countries. Portugal has 15 days left before 183. If the stay that started on 20 May continues past 15 July, day 183 falls on 30 July.
Keep the log usable as evidence
- Pick the window the country tests: the UK uses 6 April to 5 April, Portugal and Serbia look at 12-month periods.
- Enter every trip, including short visits and transit days, with dates from tickets or passport stamps.
- Set the threshold the country uses: 183, 184 for a “more than 183 days” rule or 182 for Malaysia’s test.
- Keep tickets and booking confirmations with each trip.
Related next steps
FAQ
Do arrival and departure days count?
In this calculator, yes: both dates count as days present. Countries count differently. Colombia counts entry and exit days, and the UK applies HMRC’s day-counting rules to its tax year, so check the country you are assessing.
Can I count a rolling 12 months?
Yes. Choose “12 months ending on a date” and pick the end date. The calculator counts the 12 months up to and including that date and gives the first date on which a 12-month period reaches the threshold.
How is the UK tax year counted?
Choose the UK tax year and enter the year it starts: 2026 counts 6 April 2026 to 5 April 2027. In the UK, 183 days or more in the tax year makes you automatically resident.
Can I be tax resident with fewer than 183 days?
Yes. Your Europe’s EU guidance explains that a permanent home and personal or economic ties can also decide where you are resident, and Cyprus has a 60-day rule with its own conditions.
Are my trips sent anywhere?
The trip log is saved in your browser. A share link carries only the counting window and the threshold.
Tax, visa and residence rules depend on your situation, so confirm them with the official authority. How we compare