A passport stamp tells a border officer you were somewhere on a date. A citizenship or residence application asks something much harder: exactly how many days, over several years, and on which dates did you cross each border.
Residency is earned by the day
Most routes to permanent residence or citizenship rest on a physical-presence or absence test — a count of the days you were actually inside the country (or away from it), measured across a fixed qualifying period. The exact thresholds vary by country and change over time, so always check the official guidance for your own case. But the shape is strikingly consistent: be present enough, be absent little enough, and be able to prove it.
It helps to see this as a third, separate clock. It is not the Schengen 90/180 rule, which caps short visits, and it is not the 183-day tax-residency test, which decides where you owe tax. Citizenship and residency counts have their own qualifying windows, their own arithmetic, and their own forms — and they can run for years.
Four countries, four day-counts
Each of these is a count of days, kept over years, that you must be able to document.
| Country | What it counts | The general threshold |
|---|---|---|
| United States | Physical presence + continuous residence over 5 years (3 if married to a citizen) | At least 30 months present in the 5 years; list every trip of 24h+ |
| United Kingdom | Days of absence over 5 years (3 if married to a citizen) | No more than 450 days absent in 5 years; ≤90 in the final 12 months |
| Canada | Physical presence in the 5 years before applying | At least 1,095 days present |
| Australia | Lawful residence over the 4 years before applying | No more than 12 months absent in total; ≤90 days in the final 12 months |
Sources, in order: USCIS, GOV.UK, IRCC and Australian Home Affairs. These are the standard routes; exemptions and special cases exist, and the numbers are reviewed periodically — treat the table as a map, not the territory.
The rules even disagree on how to count a single travel day. US guidance counts the day you depart and the day you return each as a day of physical presence in the country; UK guidance counts only whole days of absence and excludes the days you actually travel. On a borderline case, that difference alone can decide eligibility.
"List every trip" is meant literally
The clearest example is the US Form N-400. Its travel section asks you to list every trip of 24 hours or more taken outside the United States during the qualifying period — each departure and return date, every time. USCIS uses those dates to test two separate things at once: continuous residence (did the US stay your home?) and physical presence (were you actually here for at least 30 of the last 60 months?).
The others ask for the same thing in their own format. Canada's application is built around an official physical-presence calculator that you complete and submit, in which days spent as a temporary resident before you became a permanent resident count as half-days, up to a cap. The UK and Australia both ask you to total your days of absence and check them against the limits above.
The presumption can run against you
Here is why precision matters well beyond tidiness. Authorities don't only add up the total — they read the pattern, and gaps can count against you. Under US rules, an absence of more than six months but less than a year during the qualifying period is presumed to have broken your continuous residence; the burden then falls on you to rebut that presumption with evidence. An absence of a year or more generally breaks continuity outright.
In other words, the default assumption may not be the one you want — and your own record is your defence. Increasingly these counts are cross-checked against digital border systems that log every entry and exit automatically, whether or not your passport was ever stamped.
Why the count goes wrong
Almost nobody keeps the record as they go. Then, at application time — often years later — they reconstruct it from memory, old boarding passes, and a passport full of faded, illegible, or simply missing stamps. That reconstruction is precisely where errors creep in, and the cost of an error here is not abstract: a request for further evidence, a delayed decision, or a refusal. Our guide to counting days without losing the plot walks through why this is harder than it sounds.
Keep the record before you need it
You cannot go back and recount years you never logged. The only dependable answer is a contemporaneous record — every entry, every exit, every country, with the dates intact — kept quietly while you travel rather than assembled under pressure at the end.
That is the unglamorous job Countly does on your phone: it keeps an exact, private, per-country log of your days and border crossings — no account, no cloud, nothing leaving the device — so that when a form asks for every trip in the last five years, the answer is already written down, not dredged up from memory.
Requirements differ by country and change often; this is general information, not legal or immigration advice. Always confirm the current rules with the official immigration authority before you apply.