Mexico tax residency: there is no 183-day rule
Mexico has no statutory day-count rule — residency turns on your home and ties (see below). The day count is simply the part we can calculate, so we track 183 days as a practical flag. Source: Servicio de Administración Tributaria (SAT), last reviewed 2026-05-27.
183 days isn't the only route — Mexico can also treat you as resident on non-day grounds (permanent home (casa habitación), centre of vital interests — mexican-source income (>50%), centre of vital interests — principal professional activities, mexican nationality presumption (ordinarily-resident concept), mexican state officials / government employees, tax-haven (refipre) clawback, loss of residency requires formal notice). See every test below.
Spend 183 days or more in Mexico during the calendar year (1 January – 31 December) and it will generally treat you as a tax resident for that period.
Reviewed by Quentin Dupard, founder · last reviewed 2026-05-27 · How we research
- Threshold
- 183 days
- Counting window
- Calendar year
- Day-based test
- 1
- Last reviewed
- 2026-05-27
How does Mexico count days for tax residency?
According to Servicio de Administración Tributaria (SAT), you become a tax resident of Mexico once you spend 183 days or more there in the calendar year (1 January – 31 December). Because the count is per calendar year, it resets every 1 January and days from a previous year do not carry over — though a single stay that spans New Year is split across two years’ totals.
183 days (practical flag — Mexico has no statutory day test)
183 days · the calendar year (1 January – 31 December)Spend 183 days or more in Mexico during the calendar year (1 January – 31 December) and it will generally treat you as a tax resident for that period.
Mexico has NO statutory day-count residency test. Residency is set by your home (casa habitación) and centre of vital interests — see below (Art. 9 CFF). We keep a 183-day flag because it is the treaty tie-breaker / immigration figure and a practical warning sign, but days alone do not make you a Mexican tax resident, and staying under 183 days does not make you non-resident.
What else makes you a tax resident of Mexico?
The day count is only one route. Mexico can also make you a tax resident through any one of the following — regardless of how few days you spend there. These don't depend on a day count, so Yuravia can't track them for you; weigh them against your own situation.
Permanent home (casa habitación)
You are a Mexican tax resident if you establish your home (casa habitación) in Mexico — this is the primary statutory test under Art. 9-I-a) CFF and applies regardless of nationality or days spent; residency continues unless you also have a home abroad AND your centre of vital interests is not in Mexico.
Centre of vital interests — Mexican-source income (>50%)
Where you have a home in both Mexico and another country, your centre of vital interests (and thus residency) is in Mexico if more than 50% of your total income in the calendar year has its source of wealth in Mexico (Art. 9-I-a) inciso 1 CFF).
Centre of vital interests — principal professional activities
Where you have a home in two countries, your centre of vital interests is also deemed to be in Mexico if the principal centre of your professional activities is located in Mexican territory (Art. 9-I-a) inciso 2 CFF).
Mexican nationality presumption (ordinarily-resident concept)
Persons of Mexican nationality are presumed to be tax residents of Mexico unless they prove otherwise (salvo prueba en contrario) by demonstrating tax residency in another country; the burden of disproving residency rests on the individual.
Mexican State officials / government employees
Mexican nationals who are officials or employees of the Mexican State (funcionarios o trabajadores del Estado) are treated as Mexican tax residents even if their centre of vital interests is abroad (Art. 9-I-b) CFF).
Tax-haven (REFIPRE) clawback
A Mexican national who moves residency to a jurisdiction with a preferential tax regime (régimen fiscal preferente) is still treated as a Mexican resident for the fiscal year of the move and the following five fiscal years, unless that country has a broad information-exchange agreement with Mexico.
Loss of residency requires formal notice
Residency does not end merely by leaving; an individual must file a notice (aviso) of change of tax residency with the SAT no later than 15 days before the change, and failure to file means the person does not lose Mexican resident status.
Mexico at a glance
- Tax year
- 1 January – 31 December (calendar year); annual return due by 30 April of the following year.
- How days are counted
- Mexico does not use a statutory day-count (no 183-day rule) for general individual residency under CFF Art. 9 — residency turns on having a home (casa habitación) in Mexico and, if a home also exists abroad, on the centre of vital interests; so arrival/departure and part-day counting questions do not formally apply.
- What residency means
- Tax residents are taxed on worldwide income regardless of nationality; non-residents (including those who prove tax residence abroad) are taxed only on Mexican-source income. No general first-year/territorial exception, but Mexican nationals moving to a listed tax-haven jurisdiction remain Mexican tax residents for the year of change plus the following five years.
Official source
Servicio de Administración Tributaria (SAT). View the primary guidance ↗
Rule last checked against this source on 2026-05-27.
Count your days in Mexico
The day count is the one test you can actually calculate — the home, family and ties tests above, you can’t. Use a free calculator to see exactly how close you are to Mexico's 183-day flag — or let Yuravia track it automatically across every country at once and warn you before you cross a line.
Your trips to one country
Enter each stay in the country you're checking. Both the arrival and departure day count as days of presence.
Add at least one trip to see how close you are to 183 days in 2026.
Tracking more than one country?
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Frequently asked questions
How many days can I stay in Mexico without becoming a tax resident?
According to Servicio de Administración Tributaria (SAT), Mexico treats you as a tax resident at 183 days in the calendar year (1 January – 31 December) (the "183 days (practical flag — Mexico has no statutory day test)"). Staying under that is necessary but not sufficient — a permanent home, family, or your centre of vital interests can make you resident on fewer days.
Is the day count the only way to become a tax resident of Mexico?
No. Beyond the day count, Mexico can treat you as resident through permanent home (casa habitación), centre of vital interests — mexican-source income (>50%), centre of vital interests — principal professional activities, mexican nationality presumption (ordinarily-resident concept), mexican state officials / government employees, tax-haven (refipre) clawback, loss of residency requires formal notice — any one of these can apply even if you stay well under 183 days. They don't depend on counting days, so confirm them against your own circumstances.
What counts as a day of presence in Mexico?
In most jurisdictions any day on which you are physically present — including the arrival and departure days — counts as a full day. Treating both as counted is the conservative assumption. Always confirm the exact rule with Servicio de Administración Tributaria (SAT).
What is the official source for Mexico's tax-residency rule?
Servicio de Administración Tributaria (SAT). The rule on this page was last checked against that source on 2026-05-27. Thresholds and tests change, so confirm before relying on it.
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