183-Day Rule Calculator: Count Your Days in Any Country

Pick a country and a year, then tap the day you arrived and the day you left. The tracker shows how close you are to 183 days, planned stays included.

Last verified: October 2026

Count your days

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Keep counting as you travel. Free app for iPhone and iPad.

1. Make sure AtlasDays is installed on your iPhone or iPadFree on the App Store.
2. Scan the QR code to load all trips into AtlasDaysCheck them, then tap Import.

1. Get AtlasDaysFree on the App Store. Already have it? Skip to 2.App Store
2. Open your stays in the appCheck them, then tap Import. Nothing is saved before that.Open in AtlasDays

1. Get AtlasDaysFree on the App Store for iPhone.App Store
2. Import your stays with a fileThat is more stays than a link can carry. Download the file and open it on your iPhone with AtlasDays.Download file

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Everything stays in your browser: nothing you enter is sent or saved.

How the calculator counts

• Any part of a day counts. The day you arrive and the day you leave are both days in the country, so 1 to 10 June is ten days. A travel day between two countries counts for both.
• One country, one year. Pick the country in the tracker and the window above it: a calendar year, a tax year from the day it starts (6 April in the UK, 1 July in Australia, 1 April in New Zealand and India), or the last 12 months. Only days inside that window count.
• Stay below, or reach 183. Most people want to stay under 183 days. If you need 183 days to become resident somewhere, set the goal to Reach target: the bar turns green once you get there.
• Planned stays count too. Mark a trip you have not booked yet to see whether it would take you past 183.

When your country counts differently

Most countries count days the way this calculator does. Where yours has its own rule, its guide explains it, and AtlasDays has a ready-made tracker that counts it exactly:

• Midnights. The UK counts the days you are there at midnight. See the UK Statutory Residence Test; the AtlasDays UK tracker counts midnights.
• More than 183. Spain needs more than 183 days, not 183. See Spain; each AtlasDays tracker uses its country's exact threshold.
• Three years at once. The US Substantial Presence Test also counts part of the two previous years. See the Substantial Presence Test; AtlasDays has a tracker that does the weighting.

Days are not the only test: a home or family can make you resident with fewer. The 183-day rule explains these ties, and tax residency by country has every country's guide.

Keep counting as you travel

The calculator checks the days you remember today. AtlasDays keeps counting your days in every country as you travel, privately on your iPhone, and warns you before a trip would take you past a limit.

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FAQ

Does the day I arrive count as a day in the country?

In this calculator, yes: any part of a day counts, so both the day you arrive and the day you leave are days in that country. Many countries count this way. The UK counts midnights instead, and the UK guide explains how.

Does spending 183 days in a country make me tax resident?

Often, but not always. Many countries treat 183 days in their tax year as residence, some use a different threshold or period, and other ties such as a home or family can make you resident with fewer days. The calculator shows the count, not the decision.

Is my data stored?

No. The calculator runs in your browser and does not send, log or save the dates you enter. Closing or reloading the page clears them. To keep them, tap Track this in AtlasDays.

About this article: AtlasDays provides general information, not legal, tax, or immigration advice. Rules change and outcomes depend on your circumstances, so never rely on it alone: check the linked official source or ask a qualified professional.